US2005137A - Rotary machine - Google Patents

Description

June 1935- D. s. FAULKNER ET AL- 2,005,137

ROTARY MACHINE Filed Dec. 26, 1930 6- Sheets-Sheet l Attorneys June 18, 1935.

D. s. FAULKNER T AL ROTARY MACHINE e Sheets-Sheet Filed Dec. 26, 1930 w\ w & E w $0 6' M. Mg.

wuwntozd J ne 18, 19 5- D. s. FAULKNER ET-AL 2,005,137

ROTARY MACHINE Filed Dec. 26, 1930 6 Sheets-Sheet 3 June 18, 1935- D. s. FAULKNER ET AL. 2,005,137

ROTARY MACHINE- Filed Dec. 26, 1930 6 Sheets-Sheet 4 June 18, 1935.

D. S. FAULKNER El" AL ROTARY MACHINE Filed Dec. 26, 1930 6 Sheets-Sheet 5 June 18, 93 D, s. FAULKNER El AL 2,005,137

ROTARY MACHINE Filed Dec. 26, 1950 e SheetS -Sheet 6 In wanton;

Patented June 18, 1935 UNITED STATE no'rAaY MACHINE David SLFaulkner, Los Angeles, Allen Erwin Rice,

Hermosa Beach, and

Lewis E. Zerbe, Moneta,

CaliL, assignors, by mesnc assignments, to The National Superior Company,

Toledo, Ohio, a

corporation of Delaware Application December 26, 1930, Serial No. 504,758

66 Claims.

day well drilling apparatus.

An object of this invention is to provide a rotary machine having a one piece base which entirely encloses all working parts and protects such working parts from mud, water and other foreign matter. 7

Another object of this invention is to provide a rotary machine having a one piece base which supports a unitary pinion shaft assembly intact permitting the removal of the pinion shaft as a unit and which provides a means for positively maintaining the pinion shaft in alignment with.

the rotary table supported by the base.

Another object of this invention is to provide a rotary machine including a one piece base to which a unitary pinion shaft assembly is secured and in which rotary machine there is provided an enclosed pinion shaft lock which is enclosed to protect such pinion shaft lock from mud, water and other foreign matter, and which also prevents and makes impossible the injury of the operator of the rotary machine when actuating the pinion shaft lock.

Another object of this invention is to provide a smooth-running rotary table in which there is no side slap during the operation of such rotary machine and in which structure the supporting bearings are positively lubricated at all times.

Another object of this invention is to provide a rotary machine including a base and a rotary table and in which rotary machine the rotary table is held down by means of threading to the table skirt an adjustable ring which supports the bottom race of the hold-down bearings and forms an oil seal.

Another object of this invention is to provide a rotary machine having a one piece base and the provision in such a rotary machine of a detachable two-speed attachment which may be optionally connected with the pinion shaft assembly of the rotary machine or detached therefrom as desired.

Other objects and advantages of this invention it is believed will be apparent from the following detailed description of a preferred em-, bodiment thereof as illustrated in the accompanying drawings.

In the drawings:

Figure 1 is a top plan view partly in section of a rotary machine embodying our invention.

Figure 2 is a'sectional side elevation thereof.

Figure 3 is a sectional end view taken substantially on the line 3-3 of Figure 2.

Figure 4 is a fragmental side elevation illustrating the two-speed attachment mounted upon the base and connected with the pinion shaft.

Figure 5 is a plan view partly in section of the structure illustrated in Figure 4.

Figure 6 is an end elevation of the structure illustrated in Figure 4.

Figure 7 is a detached elevation of the shifter and control plate therefor of the two-speed attachment.

Figure 8 is a fragmental sectional view of the two-speed attachment illustrating the same as connected with the pinion shaft assembly.

Figure 9 is a fragmental sectional view of the base of a rotary machine illustrating the lubricant ducts and inlets.

Figure 10 is a fragmental sectional elevation of the structure illustrated in Figure 9.

Figure 11 is a sectional end elevation taken substantially on the line Il-II of Figure 8.

Figure 12 is a fragmental elevation of the upthrust bearing ring lock embodied in our invention.

Figure 13 is an enlarged fragmental sectional view illustrating locking means for the closure ringembodied in our invention.

In the preferred embodiment of our invention illustratedin the accompanying drawings, I indicates the base of a rotary machine which'is of one-piece construction and includes an upstanding fiange 2 formed integral with the base I and providing a bearing race way 3, the flange 2 being formed to definethe vertical passage formed axially of the base I. Formed integral with the base I at a point spaced from the flange 2 is an annular bearing retaining flange 4. Formed integral with the base I is a pair of spaced skids '5. The skids 5 extend outwardly from the annular portion of the base I and are formed integral with the outwardly extending unitary pinion-shaft portion 6 of the base I and the supporting base 1 to which a two-speed attachment means is removably secured.

The outwardly extending portion 6 of the base I is also cast integral with a housing 8 for the unit pinion shaft assembly hereinafter to be described. The housing is formed integrally with the base as to insure at all times the perfect aligning of the unit pinion shaft assembly radially with the table 9 of the rotary machine which is rotatably supported by the base I in the axial opening thereof.

The rotary table 3 includes a table ring portion I upon which a gear ring II is shrunk and supported on an annular shoulder I2. The

gear ring II is formed on its under surface with bevel gear teeth I3 which are adapted to mesh with the teeth of the bevel pinion I4 of the pinion shaft assembly.

The rotary table 3 is formed integral with a downwardly depending skirt I5 which extends through the upwardly extending flange 2 of the base I. Mounted in the bearing race way 3 is the main supporting bearing I6 which is interposed between the flange 2 and the shoulder formed as illustrated at H by the extension of the skirt I5 from the ring portion I0 of the table 3. includes upper and lower race rings I8 and I3 between which balls are mounted and retained by means of a retaining ring 20.

Mounted between the lower race ring I3 and the base are a plurality .of shims 2I utilized for the purpose of adjusting the main supporting bearings I6.

Inorder to provide for the holding of the table 9 down relative to the base I, and to provide for the closure of the space between the table 9 and the base I so as to prevent the introduction of rotary m'ud, sand or other foreign matter into the bearings 22, I6, or the' of the flange 2, thereby providing a means for preventing the flow of rotary mud under pressure, sand, or other foreign matter to within the workingmechanism of the rotary machine. The closure ring 23 likewise provides a means for supporting an up-thrust or hold-down bearing 22 which is interposed between the closure ring 23 and the annular shoulder 25 of the upwardly extending flange 2 of the base I. The bearing 22 is preferably of the ball type and includes upper and lower races 25 and 2'! between which the balls are positioned and held by means of a retaining ring 28. Ball race 26 is supported by the ring 23 on its under surface and by the annular rib 29 on the skirt I5 on its inner surface. Its concave race receives the balls of the bearing 22. The ball-race 21 is supported on its upper surface by' the shoulder 25 and on its outer surface by the inner periphery of an annular wall 30 of the flange .2.

The closure ring 23 is formed to provide an upwardly extending closure flange 3| which on its inner periphery surrounds in part the upper ball race 21 and provides the closure for the retaining of lubricant within which the bearing 22 runs.

In order to adjustthe up-thrust bearing 2' so as to prevent relative vertical movement of the table 3 in relation to the base I, and still to provide for running clearance for the said bearings, the closure ring 23 is threaded to the,

skirt i5.

in order to lock the closure ring 23 in adjusted position, the ring is provided with a downwardly extending boss 32 into which is threaded a bolt 33. A look bar 34 is slidably mounted-on the bolt 33 and is-yieldably held in position by means of a spring 35 mounted on the bolt 33 in a recess formed in theboss 32 at one end, and in positionto engage a washer 36 The bearing I6 asherein illustrated mounted on the bolt 33. The washer 33 enases the end of the cylindrical stop sleeve 33a secured to the lock bar 34 at its opposite end. The washer 36 is adjustably held in position by means of a lock nut 31a threaded upon the bolt 33. In order to prevent accidental displacement of any of the parts of this look, the bolt 33 is welded as indicated at I33 to the boss 32 and a cap I34 is welded to the outer end of the bolt 33.

The lock bar 34 is formed elongated so that its intermediate portions will flt between a pair of ears I35 which extend outwardly from the boss 32 when the lock bar 34 is in locking position. The lock bar- 34 is moved from looking position by forcing the same downwardly against the tension of the spring 35 and rotating same through 90 so that its ends will rest upon the surface of the ears I35, holding the same from engagement from within the spaced locking detents I36 formed around the end of the skirt I5 of the table 3.

The closure ring 23 is at its outer periphery formed with a curved annular mud flange I31 formed to follow the curvature of the base 2 at this point to prevent mud, sand or other detritus splashing upward into the bearing 22.

The flange 2 is provided with an upwardly extending ring portion 31 which extends upwardly above the bearing I6 mounted within the race 3 providing an enclosure for the retaining of lubricant within which the bearing I6 runs. The, overflow of the lubricant from the channel formed by the ring 31 and flange 4 runs down into the up-thrust bearing 22, filling the channel provided bythe ring flange 3| of the ring 23, maintaining both the bearings I8 and 22 running continuously in a bath of oil. The overflow from the channel provided by the flange 3| runs over the top of the flange 3| and down out of the rotary machine through the space provided between the flange 3I and the inner surface of the flange 2 of the base I.

Lubricant is supplied to the channel formed by the ring portion 31 and flange 4 from a lubricant inlet 33 communicating with this channel through a conduit 39 east during the formation of the base I. A cap 46 is threaded into the inlet 38 to prevent foreign matter finding its way to the bearings I6 and 22.

Cast integral with the base I is a pinion shaft housing 4| which, at its upper surface, is formed as a horizontal extension of a closure ring 42 of the base I. The closure ring 42 extends annularly around the main portion of the base i in position to fit within a ring groove 43 formed from the under surface of the ring gear El secured to the table 9. The ring 42 fitting within the ring groove 43 continuously around the table 3 prevents the introduction of foreign matter such as mud, water and the like into the rotary machine or to the gear ring II.

The pinion shaft assembly carrying pinion gear I4. which meshes with the gear teeth I3 is formed as a complete unit and is inserted into the housing 4|. The pinion shaft assembly which is fitted within the housing 4| is of substantially the same construction for the rotary machine in either of the cases where the ro-' tary machine is utilized with or without the two speed attachment, as hereafter described, except for the manner of connecting the drive sprocket to the pinion shaft so as to either utili'ze the two speed attachment or provide a direct connection to the pinion shaft where no such two speed attachment is employed.

The pinion shaft assembly, being formed as a unit, is completely removed from the housing 4| when it is desired to convert the rotary machine from a single speed to a two speed machine. The pinion shaft assembly for the two speed attachment is carried directly by the two speed attachment and is insertable in the housing 4| as a unit. The pinion shaft unit which carries the overhanging drive sprocket as illustrated in Figure 2 is a separate removably mounted pinion shaft assembly which is insertable in or removable from the housing 4|. Each of these assemblies is the same in so far as their construction within the housing 4|, except for the pinion shaft 45which is used for the single speed rotary and the pinion shaft 45 which is required for the rotary when equipped with a two-speed attachment.

The shaft 45 is supported on spaced bearings 45 and 41, preferably the roller type, between which bearings there is provide on the shaft 45 a locking ring 48. The locking ring 48v is keyed as indicated at 49 to the shaft 45. The bearing 46 is held from endwise movement along the shaft 45 at one end by engagement with the end face of the pinion l4, and at its opposite end by engagement with the inner hub 58 of the lock ring 48. Interposed between the bearing 41 and the lock ring 48 is an end-thrust bearing 5| which is preferably of the ball type and is constructed to include a race ring 58 which is supported on an outwardly extending annular flange 53 of the lock ring 48 and provides a race for the balls 54. Theballs 54 are held by a suitable retaining ring and also ride within a race ring 55 which is supported within the bore of a bearing spider or retaining ring 55. Interposed between the race ring 55 and the end of the bearing 41 is a thrust washer 51. The bearing spider ring 55 is formed integral with the housing cap 58 which is fitted to the end of the housing 4| and isv adjustably secured thereto by the interposing of shims 59 between the end face of the housing 4| and the inner face of the housing cap 58. The shaft 45 extends axially through the housing cap 58.

' The outer end of the bearing 41 engages the inner face of the housing cap 58 and the bearing 41 is positioned within bearing spider ring 55 so that the bearing spider ring 55 forms a sub-housing for the bearing 41 within the main housing 4|. A similar bearing spider or retaining ring 50 provides a sub-housing for the bearing 45 and is mounted around the bearing 45 and fits the cut-away portion 5| of the lock ring 48 in substantially the same manner as the spider 55 fits the cut-away portion 52 of the lock ring 48.

The bearing assembly thus provided, including the lock ring 48, is assembled as a unit before it is mounted in the housing 4|.

-In order to prevent pinion 4 from meshing too deeply with the ring gear l3, a collar 58 is threaded to the shaft 45 as indicated at 54.

' The collar 58 istlocked in position in. the case where the single speed rotary is employed by the use of a tongued key 65 which fits into an extension of the sprocket key-way 55 formed in the shaft- 45. In the case of a single speed rotary machine, the overhanging sprocket 44 is mounted on the projecting end of the shaft 45 and is keyed thereto by means of a key 58 which fits within the key-way 55 and is held in position by means of a cap 58 secured to the end of the shaft 45 by means of a cap screw 18.

The housing M is provided with a removable inspection plate ii and is removably secured in position over an opening formed in the housing 4| by means of cap screws 12. The plate 1| is provided to enable inspection of the pinion l4 so as to enable the adjustment of the pinion 14 to .be inspected. The inspection plate 1| is provided with an opening 18 which is normally capped by means of a cap 14 permitting a grease fitting 15 to be threaded into the spider 58 for the purpose of lubricating the bearing 45. Bearing 41 is lubricated from a grease fitting 18 which is threaded in a passage 11 formed in the plate 58. and which communicates at its lower end with a longitudinally extending grease passage 18 formed in the spider 55, providing a 'means for conducting lubricant to the bearing The pinion I4 is mounted in a sump 18 formed in the base i by the flange 2 on one side, and by the casting structure forming the housing 4| on its opposite side, which sump is enclosed by the casting forming the base I, and communicates at its opposite ends with a trough 88 defined by the horizontal web 8| of the base I and the ring 42 and the ring 81. Means are provided for filling the sump 178 with lubricant in which i the pinion Ml is maintained. This means includes a passage 88 formed in the base I communicating with the sump 18 on one end and with a cap opening 88 at its opposite end.

Lubricant picked up by the pinion M from the sump '15 is transferred to the gear ring i8 during the meshing of the pinion M with the gear ring I3 and as the lubricant drips from the gear ring l8, it falls into the trough 88 and is by the trough 88 returned to the sump 18. The trough 88 is at its ends where it communicates with the sump 19 provided with a pair of shallow dams 84 so that a depth of lubricant is maintained in the trough 88, permitting all foreign matter to settle from the lubricant in the trough 88 before the lubricant flows over the shallow dam 84 back into the'sump 19.

An opening is formed in the ring 42 intothe trough 80 which is normally plugged by means of a plug 85, the removal of which permits the withdrawal of the lubricant from the trough 88 and the cleansing of the trough 88 to remove foreign matter therefrom. The sump 18 is also formed with a plug opening 85, permitting draining of the lubricant therefrom when it is desired to renew the lubricant or cleanse the sump 18.

The lock ring 48 is enclosed within the housing 4! and, together with lock pawls 81, provides an enclosing means for locking pinion shaft 45 from rotation. The enclosing of this pinion shaft lock adds greatly to the safety of the operation of the rotary machine embodying our invention, eliminating the possibility of serious accidents heretofore caused by the open type of pinion shaft locks commonly used.

Two lock pawls 81 are provided mounted upon opposite sides of the pinion shaft 45 within the housing 4|. Each of the locking pawls 81 is secured to a lock pawl shaft 88, which is jourfalling into engagement with the locking lugs 81' of the lock ring 48.

Journaled on lock pawl shafts 88 on the end of said shafts extending through the housing 4| are weighted actuating levers 90, the journal hubs 9| of which are provided with a clutching face 92 which is adapted to engage the clutch collar 93 keyed to the lock pawl shaft 88 and held in position thereon by means of a nut 94 threaded to the end of the lock pawl shaft 88. The opposite end of the lever 90 is provided with a weighted head 95. The lever 90 is journaled on the shaft 88 so that the said clutch faces of the hub 9I and the clutch collar 93 are engaged when the lever has been rotated to off center position to either hold the locking pawls 81 in engagement with the locking lugs 81 of the'lock ring 48 or to hold the locking pawls81 out of engaging position against the inner surface of.

, the off center positions described, and also permits the ratcheting of the pawls when in'the engaged position and the shaft is rotating in the direction counter thereto without causing movement of the operating levers.

A packing gland 96 is provided for packing the lock pawl shaft 88 where said shaft projects from the housing 4|. I

The construction so far described provides a single speed rotary machine. Our invention also contemplates the construction of a rotary machine so as to enable the use of an attachment providing a two-speed drive for the rotary machine which, as heretofore described, may be spaced bearings 98 mounted uponthe shaft 45 on the exterior of the housing 4|. The shaft 45 is rotatably supported at its outer end in a hearing carried within the cover portion of the housing IIII.

The sleeve 91 is keyed as indicated at 99 to Y sprocket I00, which differs slightly in construction from the sprocket 44.

In order to permit replacement of the sprock et I00, as this part becomes worn more quickly than any other part of the rotary machine, without necessitating the disassembling of the unitary pinion shaft assembly and the two-speed attachment, the sprocket I is formed as a split, or. two-piece, sprocket held together. at flanges I00 by means of bolts IOI'. The two half sections of the sprocket I00 are secured to the sleeve 91 by means of the two keys 99, one being provided for each half of the sprocket I00, and by means of spaced cap screws I02. This construction allows for the removal and replacement of the sprocket I00 without disturbing the adjustment or setting of the unitary pinion shaft assembly, or the two-speed attach ment.

The sleeve 91 projects into the interior of-the two-speed attachment housing IM and is on its inner end provided with gear teeth I02.

the countershaft I04 secured in position within the two speed attachment housing III. The hub I of the gear I09 extends longitudinally of the shaft I04 and is at its outer end provided with gear teeth I06 which are adapted to mesh with a speed-shifting gear I01 which is splined to the shaft 4."; so as to move longitudinally of the shaft 45 in a splined key I08.

With the gears in mesh, as thus described, the drive to the rotary machine pinion shaft 48 is from the sprocket I00 through the gear teeth I 02 to the gear I08 from the gear teeth I08 to the shifter gear I01, and from the shifter gear I01 to the shaft 45'}, thus providing a low speed drive for the rotary machine.

A shifter fork I09 engaging the edge faces of the gear I01 is provided for shifting the gear I01 along the shaft 45 so that the gear I01 is moved out of mesh with the gear teeth I06 and is shifted to a position where the teeth III engages with the teeth I 02 providing a direct drive from sprocket I00 to the shaft 45. The shifter fork I09 is pivotally mounted on an arm III which in turn is secured to a shifter fork shaft 2 which projects through the shifter plate H3 removably secured by means of bolts II4'to the housing I0l.

Secured to the shifter fork shaft H2 on the face of the plate H3 is a shifterlever II! by means of which the shifter fork I09 is actuated.

In order to lock the two-speed attachment in selected positions, a pair of lock lugs H6 speed drive, the shifter lever I I5 is released from. between the lugs H6 and is rotated through- 180 in a plane substantially perpendicular to the axis of the shaft 2. The lever H5 is then rotated upon the pin which secures it'to the shaft II2 back into position where it is and will again fall between the pair of lugs H6, and the pin H8 is replaced to lock. the shifter lever in position again.

- The housing IN is removably secured to the S pporting base 1 by means of bolts I I9.

The gear I03 and its longitudinally extending lug'I05 isjournaled upon the shaft I04 on spaced bearings I20 and I 2I held in spaced relation by means ofa spacing ring I22. The bearings I 20 and HI are by this means located immediately within the gear I08 and the gear provided by the teeth I06 formed on the end of the hub I05.

The housing IN is of fluid-tight construction, enabling a lubricant to be maintained within the housing in which the gears I02, I88, I06 and I01 run. The sleeve I24 is fixed on quill 91 between the teeth of gear I02 and the split sprocket I 00 and the sleeve I24 projects into the housing II and is packed thereto by means of a packing gland I28.

Having fully described our invention, it is to be understood that we do not wish to be limited to the details herein set forth, but our invention 'is of the full scope of the appended claims.

We claim:

1.: In a rotary machine, the combination of 'a base having a vertically extending opening therein and an annularrecess surrounding said opening, a table mounted in said opening, table supporting bearings carried by the' base for rotatably supporting said table, up-thrust bearings between the table and the base for holding the table from upward movement relative to the base, and means secured to the table and confined in part within said annular recess for supporting and enclosing said up-thrust bearing and for enclosing the said supporting bearing to prevent introduction of foreign matter into said bearings.

2. In a rotary machine, the combination of a base having a vertically extending opening therein, bearings supported by said base, a rotary table mounted upon said bearing, the base being provided with an outwardly extending integral pinion shaft supporting portion, a gear ring secured to the table, a unitary pinion shaft assembly mounted on said pinion shaft supporting portion of said base in radial alignment with said table, and a two-speed attachment means removably secured to the outwardly extending portion of said base and adapted to be releasably secured to said pinion shaft assembly.

3. In a rotary machine, the combination of a base havinzg a vertically extending opening therein, a rotary table rotatably supported by said base in said opening, the base being provided with an outwardly extending integral pinion shaft supporting portion terminating in an integral two-speed attachment base, a unitary pinion shaft assembly mounted on said outwardly extending portion and adapted to drive the rotary table, and a two-speed attachment removably secured to said two-speed attachment base portion and providing a multiple speed drive for the pinion shaft of the pinion shaft assembly.

4. In a rotary machine, the combination of a base having a vertically extending opening therein, a rotary table rotatably supported by said base in said opening, the base being provided with an outwardly extending integral pinion shaft supporting portion formed integral with a pinion shaft housing, a pinion shaft rotatably supported by spaced bearings within said housing, a lock ring mounted on said shaft within the housing between said spacedbearings,

and pinion shaft lock pawls mounted within said housing and adapted to be releasably en gaged with said lock' ring.

5. In a rotary machine, the combination of a base having a vertically extending opening therein, a rotary table rotatably m'ounted on the base, the base being provided with an outwardly extending integral pinion shaft supporting portion, providing an integral pinion shaft housing, a pinion shaft mounted within said housing and provided at one nd with means for driving the rotary table and projecting from said housing at its opposite end, a drive sprocket secured to the projecting end of said shaft. spaced bearings mounted within said housing for rotatably supporting said pinion shaft, and lock means mounted within said. housing between said spaced bearings and adapted to engage said pinion shaft to hold said rotary table from rotation.

6. In a rotary machine, the combination of a base having a vertically extending opening therein, bearings supported by said base, a .rotary table mounted upon said bearings within said opening, the base being provided with an outwardly extending integral pinion shaft supporting portion providing a pinion shaft houssupportin'g bearing means on ing, and a two-speed attachment provided with a pinion shaft assembly adapted to be removably secured to said outwardly extending portion of the base so that the said pinion shaft assembly thereof fits within said housing in position to drive said rotary table at selected speeds.

7. In a rotary machine for well drilling, the combination of a base, a rotary table mounted on the base, supporting bearing means between the base and the table, hold-down bearing means between thetable and the base below the supporting bearing means, means for conducting lubricant to the supporting bearing means, retaining means for retaining a head of lubricant in which the supporting bearing means operate, retaining means for holding a head of lubricant within which the hold-down bearing means operate, and the hold-down bearing means being lubricated by lubricant passing the supporting bearing means lubricant retaining means.

8. in a rotary machine for well drilling, the combination of a base having a vertical opening therethrough, defined by an upstanding integral flange providing a bearing raceway, a bearing mounted in the bearing raceway, and an annular bearing retaining flange extending upwardly from the bearing raceway on the inner periphery of said raceway, providing a lubricant retaining wall for retaining a head of lubricant in the bearing raceway, a rotary table supported on said bearing and having a downwardly depending annular skirt, upthrust bearing means supported at the lower end of the skirt for holding the rotary table from being thrust upward relative to the base, means for retaining a head of lubricant around the upthrust bearing means, means for conducting lubricant to the first of said bearings, and the upthrust bearings being lubricated from lubricant passing the inner retaining flange for the first of said bearings.

9. In a rotary machine for well drilling, the combination of a base having an opening therethrough, a rotary table having a. downwardly thrust bearing means between the table and the base, the-latter said supporting means including a curved flange around the outer periphery of the upthrust bearing means to retain a head of lubricant around the upthrust bearing means, and said flange being curved to the contour of the base to provide a mud barrier for holding mud from being thrust into said bearing means, and the surfaces between said curved flange and base being lubricated by the overflow of lubricant over the retaining means from the upthrust bearing means.

10. In a rotary machine, the combination of a base having a vertical opening therethrough, a rotary table, supporting bearing means interposed between the rotary table and the base, an annular flange completely surrounding the their outer periphery, and defining the outer periphery of a bearing lubricant chamber and the inner periphery of a gear ring lubricant chamber, said annular flange extending vertically upward substantially beyond the center line of said supporting bearing to form a barrier to hold lubricant within the bearing chamber formed and to hold the lubricant from mixing with the lubricant in the gear ring lubricant chamber, a gear ring secured to the rotary table above the annular flange, a pinion adapted to mesh with the gear ring, a shaft for rotatably supporting the pinion, means for driving the shaft to drive the rotary table, and separate means for conducting lubricant to the bearing lubricant chamber and to the gear ring lubricant chamber.

11. In a rotary machine, the combination of a base having a vertically extending opening therein, a rotary table rotatably supported by said base in said opening, the base being provided with an outwardly extendingpinion shaft supporting portion, a pinion shaft housing supported thereby, a pinion shaft rotatably supported within said housing, drive means carried by theshaft and adapted to drive the rotary table, a lock ring mounted on said shaft within the housing, means within the housing to engage the lock ring and hold the pinion shaft from rotation, and means extending through the housing for operating the lock means from the exterior of said housing.-

12. In a rotary machine, the combination of in the housing for engaging the lock means to' hold the shaft from rotation, and means extending through said housing for operating the latter said means to and from engagement with said locking means.

13. In a rotary machine, the combination of a base having a vertically extending opening therein, a rotary table rotatably mounted on the base, an outwardly extending pinion shaft supporting means extended outwardly from the base, a pinion shaft housing supported by said portion, a pinion shaft mounted within said housing and providing at one end means for driving the rotary table and projecting from said housing at its opposite end, drive means secured to the projecting end of said shaft, bearings mounted within said housing for rotatably supporting the pinion shaft, lock, means mounted within said housing on the shaft, and means within said housing adapted to engage said lock means tohold the shaft from rotation, and means extending through said housing for actuating the latter said means to and from locking position.

14. In a rotary machine, the combination of a base having a vertically extended opening therein, a rotary table including a gear rotatably mounted on the base, the base being provided with an outwardly extending integral pinion shaft housing, a unitary pinion shaft assembly mounted within the housing, the pinion shaft assembly including gear means on the shaft having rolling contact with the table gear to impart rotation thereto for driving the rotary table means on the outer end for driving the shaftjaxially spaced bearings for rotatably supporting the shaft within said housing, the said pinion shaft assembly being insertable into the housing as a unit from the outer end thereof in position to drive the rotary table, and means secured to the outer end of said housing for retaining the pinion shaft assembly in driving position within the housing.

- 15. In a rotary machine for drilling wells, the combination of a base, a rotary table including a gear rotatably supported by the base, a pinion shaft, gear means on the shaft having rolling contact with the table gear to impart rotation thereto whereby said pinion shaft drives said rotary table, a housing supported by said base, a pair of bearings within said housing for rotatably supporting the pinion shaft, said pinion shaft, bearings and rotary table drive means being removable as a unit.

through the outer end of said housing, and thrust bearing means adjacent the outer end of said housing for holding the pinion shaft assembly in driving position with relation to the rotary table.

17. In a, rotary machine for drilling wells, the combination of a base, a rotary table including a gear rotatably supported by said base. a pinion shaft, gear means on the shaft having rolling contact with the table gear to impart rotation thereto whereby said pinion shaft drives said rotary table, a housing supported by saidbase, a pair of bearing means mounted on said shaft for rotatably supporting said pinion shaft within said housing, means between said bearings for maintaining the bearings in spaced relation, including end thrust bearing means, and means secured to the outer end of said housing for closing the outer end thereof, and for transposing the end thrust imposed upon said end thrust bearings to said housing.

18. In a rotary machine for drilling wells, the combinatiofi of a base, a rotary table including a gear rotatably supported by said base, a pinion shaft, gear means on the shaft having rolling contact with the table gear to impart rotation thereto whereby said-pinion shaft drives said rotary table, a housing supported by said base, a pair of bearing means mounted on said shaft for rotatably supporting said pinion shaft within said housing, means between said bearings for maintaining the bearings in spaced relation, including end thrust bearing means,

means secured to the outer end of said housing for closing the outer end thereof, and for transposing the end thrust imposed uponsaid end thrust bearings to said housing, and the latter said means being removably secured to said housing to permit the pinion shaft assemdriving the rotary table from the pinion shaft,

a pinion shaft housing supported by the base.

axially spaced bearings carried by the shaft for I.

accents rotatably supporting the pinion shaft within said housing, said pinion shaft bearing means and rotary table drive means being removable as a unit through the outer end of said housing.

20. In a rotary machine for drilling wells, the

combination of a base, a rotary table rotatably supported by the base, a pinion shaft, meansfor driving the rotary table from the pinion shaft, a housing supported by said base, a pair of bearings for rotatably supporting the pinion sha'ft within the housing, a pair of spaced bearing retainers for said bearings, a spacing means on said shaft between said bearings, end thrust bearing means interposed between the spacing means and the outer of said bearings, and means for securing the outer bearing retaining means to the outer end of said housing.

21. In a rotary machine for drilling wells, the combination of a base, a rotary table rotatably supported by the base, a pinion shaft, means for driving the rotary-table from the pinion shaft, a housing supported by said base, a pair of bearings for rotatably supporting the pinion shaft within the housing, a pair of spaced bearing retainers for said bearings, a spacing means on said shaft between said bearings, end

thrust bearing means interposed between the spacing means and the outer of said bearings, means for securing the outerbearing retaining means to the outer end of said housing, the latter said means being removably secured in position to permit the pinion shaft assembly, including the pinion shaft, retainers, bearings, and rotary table drive means, being removed from the outer end of said housing as a unit.

22. In combination with a rotary machineya rotary tabledrive means including a pinion shaft, a housing for the pinion shaft, bearings for rotatably supporting the pinion shaft in the housing, the pinion shaft extending from the housing, a quill shaft journaled on the pinion shaft, means for driving. the quill shaft, means for connecting the quill shaft directly to the pinion shaft, and means for connecting the quill shaft to the pinion shaft through a train of change speed gears.

23. In combination with a rotary machine, a rotary table drive means including a pinion shaft, a housing for the pinion shaft, bearings for rotatably supporting the pinion shaft in the housing, the pinion shaft extending from the housing, a quill shaft journaled on the pinion shaft, means for driving the quill shaft, means for connecting the quill shaft directly to the pinion shaft; means for connecting the quill shaft to the pinion shaft through 'a train of change speed gears, ahousing for the said means for connecting'the quill shaft with the pinion shaft, and means for actuating the said connecting means including an actuating lever ex:

' tending from said housing.

.24. In combination with a well drilling rotary machine, of a rotary machine table drive including a pinion shaft, means for rotatably'supporting the pinion shaft, a quill shaft journaled on the pinion shaft, a drive sprocket removably secured to the quill'shaft, a change speed gear housing within which the pinion shaft is jour- ,naled, means within the housing for directly of change speed gears, and means for actuating the said quill and pinion shaft connecting means. 25. In a rotary machine for drilling wells, the

combination of a base having a vertically ex tending annular flange, an opening in said flange, a housing extending outwardly from said flange and said opening of said flange, a rotary table rotatably supported by said base, a pinion shaft assembly mounted within said housing, said pinion shaft assembly including spaced inner and outer bearing supporting means, bearings supported thereby, and a rotary table drive pinion, and being removable outwardly through the outer end of said housing, said inner bearing means having limited axial freedom and closing the opening in said annular flange, and said outer bearing supporting means" being axially immovable in operation.

26. In a rotary machine, the combination of a base having a vertical opening therein, a table mounted in the vertical opening from the top thereof, a supporting bearing carried byv the basefor rotatably supporting said table, a closure ring secured to said table, said closure ring having a'curved annular mud flange interposed between the base and the table near the lower end of said table to protect said supporting bearing from foreign matter. s

27. In a rotary machine, the combination of a base having a vertical opening therein, a table mounted in the vertical opening from the top thereof, supporting bearing means between .the table and the base for rotatably supporting said table, a closure ring interposed between; the base and the table near the lower end ofsaid table, upthrust bearing means supported by said closure ring and a portion of said closure ring being of greater diameter than the opening in said base surrounding the upthrust bearing to form a barrier for deflecting foreign matter from the entrance to the bearings between the base and the table.

28. In a rotary machine, the combination of a base having a vertical opening therein and an annular recess in said base surrounding said opening, a table mounted in the opening, a supporting bearing, between the table and the base for rotatably supporting said table, 'a closure ring positioned in part inv said recess and being secured to the lower end of said table, an upthrust bearing between said base and closure ring, said closure ring being formed to provide a lubricant reservoir in which the upthrust bearing operates.

29. In a rotary machine, the combination of a base having a vertical opening therein, a table mounted in the vertical opening, supporting bearings means between the base and the table for rotatably supporting the table, the table having adepending skirt extending downwardly in the opening of said base, anupthrust bearing between the table and the base, a ring adjustably secured to the downwardly depending skirt .of said table for supporting said upthrust hearing, and means secured to the ring and adapted to engage the skirt to lock the ring in adjusted position, the latter said means including a threaded pin member secured to the ring, a-lock block slidably mounted on said pin member and having a projection to engage a notch in said table, a nut threaded on said pin member to clamp the block to said ring, means to prevent ing the supporting bearing assembly circumferentiallyto define a separate lubricant chamber for. the bearing, an outer upstandingiannular wall on the base cooperating with the table to define a separate lubricant chamber between the inner and outer annular walls, an opening in said outer wall below the upper edge thereof and drive means insertable through said opening to rotate within the outer lubricant chamber and drive the table.

31. In a rotary machine for well drilling, the combination of a base, a rotary table having an annular bevel gear ring and a reduced annular portion beneath the gear ring, a supporting bearing mounted on the base beneath the reduced annular portion of the table to rotatably support the latter, an inner annular upstanding.

wall in the base completely enclosing the supporting bearing circumferentially and overlapping the reduced annular portion of the table to define a separate lubricant chamber for the bearing, an outer upstanding annular wall on the base cooperating with the table to deflne a separate enclosed lubricant chamber between the inner and outer annular walls, an opening in said outer wall below the upper edge thereof, and drive means insertable through. said opening to rotate within the outer lubricant chamber and drive the bevel gear ring.

32. In a rotary machine for drilling wells, the combination of a base having a vertically extending annular flange, a rotary table rotatably supported by the base and cooperating with said annular flange to form a complete enclosure around the table, an opening in said flange, a housing extending outwardly from the flange and having an opening coextensive with the opening in the flange, a pinionshaft assembly mounted within the housing, the pinion shaft assembly including a shaft, a pinion, a pair of spaced bearing retainers mounted within the housing, bearings mounted within the retainers to rotatably support the shaft, said retainers being removable outwardly through the outer end of said housing. the inner bearing retainer normally closing the opening in the annular flange, and said outer bearing retainer closing the outer end of the housing.

33. In a rotary machine for drilling wells, the combination of a base having a vertically extending annular flange, a rotary table rotatably supported by the base andcooperating with the annular flange to form a complete enclosure around the table, an opening in the flange below the upper edge thereof, an integrally formed housing extending outwardly from said flange and having a circular opening coextensive with the opening in said flange, a pinion shaft assembly mounted within said housing, and including a shaft, a pinion, a pair of spaced circular bearing retainers mounted within the housing, bearings mounted within the retainers to rotatably support the shaft, and separate means cooperating with the housing to prevent rotation of the bearing retainers.

34. In a rotary machine for drilling wells, the combination of a base having a vertically extending annular wall. a rotary table having a .the gear ring on the table, bearing means aligned in said housing to rotatably support the shaft, and a removable inspection hole cover in the housing to permit inspectionof the gear meshing action between the pinion and gear ring.

35. In a rotary machine for drilling wells, the combination of a base having a vertically extending annular wall, a rotary table having a gear ring and rotatably supported by the base i and cooperating with the annular wall to form a complete enclosure around the table, an opening in the flange below the upper edge thereof, an integrally formed housing extending outward ly from the flange and having a circular open-'- ing coextensive with the opening in the flange, a pinion shaft assembly mounted within the housing and including a shaft, a pinion meshing with the gear ring on the table, a pair of bear-.

ing retainers mounted within the housing, bearings mounted within the retainers to rotatably support the shaft, a removable inspection hole cover in the housing, means cooperating with one of said bearing retainers and said inspection hole cover to prevent the rotation of the retainer.

36. In a rotary machine for drilling wells, .the combination of a base having a vertically extending annular wall, a rotary table having a gear ring and rotatably supported by said base and cooperating with the annular wall'to form a complete enclosure around the table, an opening in the flange below the upper edge thereof, an integrally formed housing extending outwardly from the flange and having a circular opening coextensive with the opening in the flange, a pinion shaft assembly mounted within the housing and including a shaft, a pinion meshing with the gear ring on the table, a pair of bear-' ing retainers mounted within the housing. bearings mounted within the retainers to rotatably support the shaft, the inner of said bearing retainers adjacent to the pinion end being slidably mounted within the housing, and the outer of the bearing retainers being rigidly fixed within the housing.

3'7. In a rotary machine, the combination of a base having a vertically extending opening therethrough, a rotary table rotatably supported by the base in the opening, the base being provided with an outwardly extending pinion shaft supporting housing, a pinion shaft rotatably supported by spaced bearings within the housing, drive means carried by the shaft and adapted to drive the rotary table, locking means mounted on the shaft within the housing, means pivoted within the housing for swinging into engagement with the lock means to hold the shaft from rotation, means extending through the housing for operating the latter swinging means-to and from engagement with the locking means; said operating means including a lost motion connection so that the operating means has a greater angular travel than the angular travel of the swinging lock means.

38. In a rotary machine, thecombination of a base having a vertically extending opening therethrough, a rotary table rotatably supported by the base in the opening, the base being provided with an'outwardly extending pinion shaft supporting housing, a pinion shaft rotatably supported by spaced bearings within the housing, drive means carried by the shaft and adapted to drive the rotary table, locking means mounted on the shaft within the housing, means ivoted within the housing for swinging into engagement with the lock means to hold the shaft from rotation, means extending through the housing for operating the latter swinging means to and from engagement with the locking means, said operating means including a lost motion connection so that the operating means has a greater angular travel than the angular travel of the swinging lock means, and counterweight means adapted to hold the lock-engaging means in either the engaged or disengaged position.

39. In a rotary machine of the type employed in the drilling of oil wells, the combination of a base, a rotary table including a gear rotatably supported by said base, a pinion shaft, gear means on the shaft having rolling contact with the table gear to impart rotation thereto whereby said pinion shaft drives said rotary table, a housing supported by said base, and a pair of bearing means for rotatably supporting said pinion shaft, said bearing means being contained in said housing, said pinion shaft and said bearing means being removable as a unit from the end of said housing, while saidhousing is supported by said base.-

40. In a rotary machine of the type employed in the drilling of an oil well, the combination of a base having an upstanding wall, an opening in said wall, and a housing extending outwardly from said wall in communication with said opening, a table rotatably supported by said base, said base, upstanding wall, and said table defining a chamber, aring gear on said table within said chamber, and a pinion shaft assembly including a' pinion. shaft, axially spaced supporting bearings and a drive pinion having rolling contact with the ring gear to impart rotation thereto, said pinion shaft assembly resting in said lubricant chamber and said housing, and being removable outwardly through said housing.

- 41. In a rotary machine of the type employed in the drilling of an oil well, the combination of, a base having an upstanding wall, an opening in said wall, and a housing extending outward- 1y from said wall in communication with said opening, a table rotatably supported by said base, said base, upstanding wall, and said table defining a chamber, 'a ring gear on said table within said chamber, and a pinion shaft assembly including a pinion shaft, axially spaced supporting bearings and a drive pinion having rolling contact with the ring gear to impart rotation thereto, said pinion shaft assembly resting in said lubricant chamber and said housing, and being removable outwardly through said housing, said pinion shaft assembly including means for closing said opening in said upstanding wall.

42. In a rotary machine of the character employed in drilling oil wells, the combination of, a base having a central opening, and a recess formed in the base around the lower end of said central opening, a rotary table rotatably supported on said base, and having an extension tension for completely closing the lower end of said recess and for supporting said hold-down bearing.

43. In a rotary machine of thetype employed for drilling oil wells, the combination of, abase, a rotary table including a gear rotatably supported by'said base, a pinionshaft, gear means on the shaft having rolling contact with the table gear to impart rotation thereto whereby said pinion shaft drives said table, a closed housing having an inner and an outer opening integral with said base, and a pair of bearing means for supporting said pinion shaft, said bearing means resting in said housing and being held in alignment thereby,-said shaft, driving means and bearing means being insertable into said housing through the outer opening thereof.

44. In a rotary machine of the type employed for drilling oil wells, the combination of, a base, a rotary table supported on said base, a ring gear secured to said table, means forming a closed chamber in which said ring gear is located, there being a chamber opening for said chamber, a

housing supported by said base in communlcation with said chamber opening, the outer end of said housing having an entrance opening, a pinion assembly including a pinion shaft, a pair of bearings for said pinion shaft, and a pinion secured to said pinion shaft having rolling contact with the ring gear to impart rotation thereto, said pinion assembly being insertable through said entrance opening so that said pinion meshes with said ring gear, and said pair'of bearings rest in said housing, and means constituting a port of said pinion assembly for closing said chamber opening when said pinion assembly is installed.

45. In a rotary machine of the'type employed for drilling oil wells, the combination of a base, a rotary table supported by said base, a drive shaft, means whereby said drive shaft drives said table, a fully closed housing supported by said base, bearing means for said shaft in said housing, and lock means for said shaft in said housing.

46. A rotary machine including a base casting having an outer vertically extending flange, an inner flange, and a casing; a cover means for said casing, a rotary table journaled upon said inner flange and forming a seal with said outer flangeja ring gear mounted upon said table, a bearing means mounted in said'outer flange adjacent said casing, a bearing carried by said cover meansin alignment with said last named bearing, a shaft journaled in said bearings ex tending from said easing into the annular space between said outer and inner flanges, and a pinion mounted upon the extended end of said porting the table on the base. the table being formed with a downwardly depending skirt extending into an opening formed in the base, a closure ring secured tothe lower end of the skirt, a shoulder provided on the base below the supporting bearings, an anti-friction upthrust bearing interposed between the closure ring and the shoulder, the closure ring being adjustably secured to the skirt and the closure.

ring and the base being formed to provide a close fit around'the outer periphery of the clo sure ring to prevent the entrance of foreign matter into the upthrust bearing. v

48. In a rotary machine, the combination of a base, a rotary table, supporting bearings between the base and the table for rotatably supporting the table on the base, the table being formed with a downwardly depending skirt extending into an opening formed in the base, a closure ring adjustably secured to the lower end of the skirt, a shoulder provided on the base below the supporting bearings, an anti-friction upthrust bearing interposed between the closure ring and the shoulder, the closure ring and the base being formed to provide a close .fit around the outer periphery of the closure ring to prevent the entrance of foreign matter into the upthrustbearing, the closure ring being adjustably secured to the skirt to enable adjustment of the closure ring on the lower end of the skirt to adjust the bearing clearance between the supporting and the upthrust bearings, and lock means to lock the closure ring in its adjustedposition.

49. In a rotary machine of the character employed in drilling oil wells, the combination of: a base having a central opening, and a recess formed around the lower end of said central opening; a rotary table rotatably supported on said base, and having an extension projecting through said central opening; a hold-down bearing in said recess engaging said base; a closure ring secured to said extension for completely closing the lower end of said recess and for supporting said hold-down bearing; andlubricant supply means for filling said recess with lubricant.

50. In a rotary machine of the character employed in drilling oil Wells, the combination of a base having a central opening, a recess formed around the lower end of said central opening, the rotary table rotatably supported on said base and having a downwardly projecting skirt, a hold-down bearing mounted in the recess engaging the base, a supporting bearing interposed between the table and the base, and cooperating means adjustably secured to the skirt providing a close fit between the skirt and the base for resisting the entrance of foreign matter into said recess.

51. In a rotary machine of the type employed for drilling oil wells, the combination of: a base; a rotary table rotatably supported by said base; a pinion shaft; means whereby said pinion shaft drives said table; a housing supported by said base; a pair of bearing supporting means, bearings supported thereby for supporting said pinion shaft, said bearing supporting means resting in said housing and being held in alignment thereby; and means for securing one of said bearing supporting means from axial movement in said housing, the other of said bearing supporting means being free to move axially in said housing.

52. In a rotary machine of the type employed for drilling oil wells, the combination of a base, a rotary table rotatably supported on said base, a gear secured to said table, means forming an enclosed chamber in which said gear is located, there being an opening from said chamber, a housing formed integral with the base in communication with the chamber opening, the outer end of said housing having an entrance opening, and a pinion shaft assembly including a pinion shaft, a pair of spaced bearings for the pinion shaft and a pinion secured to the pinion shaft, said pinion having rolling contact with the table gear to impartrotation thereto, said bearings being wholly mounted within and enclosed by the housing, and said pinion shaft assembly being insertablethrough the entrance opening so that the pinion meshes with the gear. 7

53. In a rotary machine for drilling wells having a base with a vertically extending opening therethrough, a rotary table rotatably supported by the base in the opening, an outwardly extending pinion shaft housing secured to said base, a pinion shaft rotatably supported by bearing means within said housing, and drive means carried by the shaft and adapted to drive the rotary table, in combination with lock means mounted on the shaft within the housing, means including a pivotally mounted element within the housing for selective engagement with the lock means to hold the shaft from rotation, a pivotally mounted actuating element positioned without the housing, and means operatively con- 'necting said elements, said means including a lost motion connection so that one element will have an angular range of travel greater than the other.

54. In a rotary machine for drilling wells having a base with a vertically extending opening therethrough, a rotary table rotatably supported by the base in the opening, an outwardly extending pinion shaft housing secured to said base, a pinion shaft rotatably supported by bearing means Within said housing, and drive means carried by the shaft and adapted to drive the rotary table, in combination with lock means mounted on the shaft within the housing, means including a pivotally mounted element within the housing for selective engagement with the lock means to hold the shaft from rotation, a pivotally mounted actuating element positioned without the housing, and means operatively connecting said elements, said means including a lost motion connection so that the first named element will be free to have a limited amount of movement when the actuating element is stationary and in the engaged position.

55. In a rotary machine for drilling wells having a base with a vertically extending opening therethrough, a rotary table rotatably supported by the base in the opening, an outwardly extending pinion shaft housing secured to said base, a pinion shaft rotatably supported by bearing means within said housing, and drive means carried by the shaft and adapted to drive the rotary table, in combination with lock means mounted on the shaft within the housing, means including a pivotally mounted element within the housing for selective engagement with the lock means to hold the shaft from rotation, a pivotally mounted actuating element positioned without the housing, and means operatively connecting said elements, said means including a lost motion connection so that the first-named element will be free to move a limited amount independently of the other element.

56. In a rotary machine for well drilling, the combination of a base having an opening therethrough, a rotary table having a downwardly depending skirt extending through said opening,

supporting bearing means carried by the base for rotatably supporting the table, means carried by the lower end of the skirt and fitting in part within an annular recess in the base for supporting upthrust bearing means between the 75 table and the base, the latter said supporting means including an annular flange around the outer periphery of the upthrust bearing means to retain a head of lubricant around the upthrust bearing means, said flange being offset radially outwardbelow the recess to a diameter greater than the diameter of the annular recess in the base to provide a barrier against the impingement of mud into the space between the flange and the recess in the base.

57. In a rotary machine, the combination of a base having a vertical opening therethrough, a rotary table including a gear ring mounted thereon, means including an upstanding wall on said base cooperating with the table to enclose the gear and to define the outerperiphery of a gear lubricant chamber, an opening in said wall below the upper edge thereof, supporting bearing means interposed between the rotary table and the base, an annular flange completely surrounding the supporting heating means on their outer periphery and defining the outer periphery of a bearing lubricant chamber and the inner periphery of the gear lubricant chamber, said annular flange extending vertically upward substantially beyond the upper level of said supporting bearing to form a barrier to hold lubricant within the bearing chamber formed and to hold the lubricant from mixing with the lubricant in the gear lubricant chamber, said gear ring being secured to the rotary table above the annular flange, a pinion insertable through the opening in said wall to rotate in said gear lubricant chamber and adapted to mesh with thegear ring, a shaft for rotatably supporting the pinion, means for driving the shaft to drive the rotary table, and separate means for conducting lubricant to the bearing lubricant chamber and to the gear ring lubricant chamber.

58. In a rotary machine, the combination of a base having a vertical opening therein, an annular recess in said base surrounding said opening, a table mounted'in the vertical opening from the top thereof, a supporting bearing carried by the base for rotatably supporting said table, a closure ring secured to said table, said closure ring having an annular flange interposed in part within said recess between the base and the table near the lower end of said table toprotect said supporting bearing from foreign matter.

59. In a rotary machine for drilling wells, the combination of a base, a rotary table rotatably supported by the base, a bearing housing supported, on said base, a shaft positioned axially of a bore in said housing, a pinion on said shaft insertable through said bore and adapted to drive said table, radial bearing means positioned within the bore adjacent said pinion to rotatably support the inner end of said shaft,

and bearing means supported adjacent the outer end of said housing to rotatably support the outer end of the shaft, said latter bearing means including thrust carrying means to take the axial end thrust transmitted to the shaft by said pinion.

60. In a rotary machine for drilling wells, the combination of a base, a rotary table rotatably supported by the base, a bearing housingv supported on said base, a shaft positioned axially of a bore in said housing, a pinion on said shaft insertable through said bore and adapted to drive said table, radial bearing means positioned within the bore adjacent said pinion to rotatably support theinner end of said shaft, bearing means supported adjacent the outer end of said housing to rotatably support the outer end of the shaft, said latter bearing means including, thrust carrying means to take the axial end thrust transmitted to the shaft by said pinion, and means to adjust the axial end play of said shaft relative to said thrust carrying means.

61. In a rotary machine for drilling wells, the combination of a base, a rotary table rotatably supported by the base, a bearing housing supported on said base, a shaft positioned axially of a bore in said housing, a pinion on said shaft insertable through said bore and adapted to drive said, table, axially spaced radial bearing means within said bore for rotatably supporting said shaft, and thrust bearing means to take the axial end thrust transmitted to the shaft by said pinion.

62. In a rotary machine for drilling wells, the combination of a base, a rotary table rotatably supported by the base, a bearing housing supported on said base, a shaft positioned axially of a bore in said housing, a pinion on said shaft insertable through said bore and adapted to drive said table, axially spaced radial bearing means within said bore for rotatably supporting said shaft, thrust bearing means to take the axial end thrust transmitted to the shaft by said pinion, and means to adjust the axial end play of said shaft relative to said thrust bearing means.

63. In a rotary machine for drilling wells, having a base, a table rotatably mounted on the base, a drive pinion adapted to drive said table, a pinion shaft rotatably supported on said base to drive said pinion, in combination with a drive sleeve rotatably mounted on the shaft, said sleeve having a drive sprocket and a drive pinion formed thereon, a gear casing on the base being movable axially of the pinion shaft to a position to enclose said drive pinion, means to detachably secure the casing to the base in said position, a bearing in said casing to rotatably support the outer 'end of said shaft, change speed gears within said casing adapted to be driven by said drive pinion, means within said casing for releasably connecting the drive sleeve directly to the. shaft,means within said housing for releasably connecting the drive sleeve to the shaft through said change speed gears driven by said drive pinion, and means operable from without said casing for selectively actuating the aforesaid connecting means.

64. In a rotary machine, the combination of a base, a rotary table having a gear and being rotatably supported by the base, means including a vertically extending annular wall on said base cooperating with the table to form a, complete enclosure around the gear, an opening in the wall, a lateral extension on the base having an opening co-extensive with the opening in said wall and terminating with a flange face, a pinion insertable through said opening to mesh with the table gear, a shaft having a drive member to drive said pinion, bearing means to support said shaft, closure means abutting said flange face for closing the opening in said extension, said annular wall, extension and closure means cooperating to deflne an enclosure for said gear and pinion, a lock element carried by said shaft within said enclosure, lock means positioned within said enclosure and adapted to releasably engage said lock element to secure said pinion against rotation, and means extending through the wall of .said enclosure for operating said lock means from outside the enclosure.

65. In a rotary machine, a base, a table r0- tatably mounted on the base, 'a gear carried by the table, a .drive means for driving the gear, including a pinion and a pinion shaft, means cooperating with the table and the base forming an enclosure for the gear, pinion and pinion shaft to prevent the admission of foreign matter thereto, lock means mounted within the enclosure to engage the drive means to lock the gear from rotation, and means extending through the enclosure for actuating said locking means.

66. In a rotary machine, a base, a table'rotatably mounted .on the base, a gear carried by the table, a drive means for driving the gear, including a pinion and a pinion shaft, means cooperating with the table and the base forming anenclosure for the gear, pinion and pinion shaft to prevent the admission of foreignmatter thereto, lock means including a pivotally mounted locking element mounted within the enclosure to engage the drive means to lock the gear from rotation, and meansextending through the en-' 10 closure for actuating said locking means.

DAVID S. FAULKNER. ALLEN ERWIN RICE L EWIS' E. ZERBE.

CERTIFICATE OF CORRECTION.

Patent No. 2,005,131. June 18. 1935.

' DAVID s. FAULKNER, ET AL.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 5, first column, line 59, claim 5, for "nd" read end: page 6, second column, line 74, claim 19. after "base" strike out the period and insert a comma; and page 7, second colunm, line 12, claim 25, after "hearing" insert the word supporting;.and that the said Letters Patent should be read with these corrections therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 20th day of August, A. D. 1935.

Leslie Frazer (Seal) Acting Commissioner of Patents.

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