US2292892A - Milling machine - Google Patents

Description

Aug. 11, 1942. N. M; MARSILIUS MILLING MACHINE '7 Sheets-Sheet 1 Filed March 18, 1940 INVENTOR NEWMAN M MAR'5\L\U5 ATTORNEY Aug. 11 1942- N. M. MARSILIUS MILLING MACHINE Filed March 18, 1940 7 Sheets-Sheet 2 m RN INVENTOR NEWMAN M. MARSILI ATTORNEY Aug. 11, 1 4 N. M. MARSILIUS I 2,292,392

MILLING MACHINE Filed March 18, 1940 7 Sheets-Sheet 3 J BY KTTORNEY Aug.1 l, N. M. MARSILIUS" 2,292,892

MILLING MACHINE I I Filed March '18, B40 v '7 sheets-sheet 4 INVENTOR I NEWMAN M. mmzaluus I ATTORNEY Aug. 11, 1942. 'N. M. MARSILIUS 292,892

MILLING MACHINE Filed March 18, 1940 '7 Sheets-Sheet 5 FIG-12 ATTORNEY Aug. 11, 1942 N. M. MARSILIUS MILLING MACHINE Filed March 18, 1940 7 SheetsSheet 6 INVENTOR NEWMAN M. MARSILIUS 'ATTORNEY 1942- N. M. MARSILEUS 2,292,892

MILLING MACHINE Filed March 18, 1940 7 Sheets-Sheet '7 FIG. 7

INVENTOR NEWIWAN M MARfiRJU'D ATTORN EY Patented Aug. 11,1942

UNITED STATES PATENT OFFICE MILLING MACHINE NewmanM. Marsilius, Bridgeport, Conn.

Applicati n March 18, 1949, Serial No. 324,655

15 Claims.

This invention relates to new and useful improvements in machine tools and has particular relation to milling machines.

The objects and advantages of the invention will become apparent from a consideration of the following detailed description taken in cone nection with the accompanying drawings where= in a satisfactory embodiment of the invention is shown. However, it is to be understood that the inventionis not limited to the details disclosed but includes all such variations and modifications as fall within the spirit of the invention and the scope of the appended claims.

In the drawings:

Fig. l is a side elevational view showing the machine of the invention;

Fig. 2 is a front .elevational View of a portion of the machine;

Fig. 3 is aside elevation, of the upper portion of the machine, the view being taken as looking from the side opposite that shown in Fig. 1;

Fig. 4 is a view partly in rear elevation and partly in section showing the driving means of the machine, the view being on an, enlarged scale;

Fig. 5 is a sectional view through one portion of the drive means;

Fig. 6 is a longitudinal sectional view through the upper rear portionof the machine;

Fig. 7 is a similar view through the forward portion of the machine;

Fig; 8 is a horizontal sectional view taken as along the line 8.8 of Fig. '7;

Fig. 9 is a vertical sectional view taken as along plane of the line 9-9 of Fig. 7;

Fig. 10 is a detail view partly in elevation and partly in section showing a bracket employed;

Figs, 11, 12 and 13 are elevational views showing cams employed;

Fig. 14 is a side elevational view showing the connection between the indexing cam and the control valve operated thereby;

Figs. 15, 16 and 17 are schematic views showing the cycle of operation of the work indexing and the work holding means the operation of which is controlled or timed by the cam of Figs. 11 and-1,4.

Referring in detail to drawings the machine includes a cabinet-like base generally designated l9 and comprisinga top wall ll about which is an upwardly directed flange l2. Disposed on the top wall II is the bed, of the machine generally designated I3 and which on its upper side is provided with ways 14 receiving the corresponding waysof. a slide generally designated IS. The slide is moved back and forth on the bed l3 during operation of the machine as will later more fully appear. At its forward end slide l5. mounts a cutter carrier generally designated l6 and the construction and mounting of this I part will later be given further consideration.

upper sides supporting the stationary jaw or' A lower forward portion of the bed I3 is provided with ways I receiving the corresponding portions of a slide generally designated I8. Slide I8 (see Fig. 7) is provided with a not or threaded bushing [9 into which is threaded an end portion of an adjusting screw 20 having bearing in a lug 2| and having its outer end portion 22 shaped to be -engaged by a wrench or other tool. With this arrangement it will be clear that as the screw 2!! is rotated in one dimotion or the other, the slide l8 will be moved along the ways I! toward or from the cutter carrier IS. The collar 23 about the outer portion of the screw 20 may be graduated as shown.

Slide 18 in its upper side is provided with ways 24 arranged at right angles to the ways I1 and mounted on the slide l8, andguided by and adjustable along the ways 24, is a casting 25 which is in part straddled and enclosed by a casting 26 also supported on the slide l8 and adjustable therewith but not relativ thereto.

On the, upper side of the casting 26 are a pair of parallel rib-like members 21 (see Fig. 9) defining between them a channel 28 andon their block 29 of a vise means generally designated 3,0. Similarly on the upper side of a portion of the casting 25 and in parallel relation with one another and with the rib-like members 2'1. are rib-like members. 3| defining between them a channel 32 and at their upper sides supporting the stationary block or jaw 33 of a vise means 34 arranged at the side of and of the same construction as the vise means 311.

E ch of e v e m ans 3 and 3.4 inc l fi a piston and cylinder construction and as such constructions are substantially identical, a detailed disclosure of but one is given. The cylinders of the respective constructions are designated .35 and 36, respectively and the vises include movable jaws 31 and 38 respectively. The details of construction of the piston and cylinder assemblies and of the connections of the pistons with the movable vise jaws will be understood from Fig. 7 wherein the mentioned construction of the visa means is disclosed In the cylinder is a piston 39 the rod 40 of which is threaded into a sleeve 4| located within a hollow extension portion 42 of the vise jaw 31. These parts are located within the channel 28 provided in the upper side of the casting 26 and extend beneath the block stationary vise jaw 29. Sleeve 4| has a head-like portion 43 against one end of the tubular extension 42 and a nut 44 is threaded onto the other end of said sleeve and bears against the rear end of the vise jaw 31. Thus the sleeve 4| is clamped to the movable vise jaw.

The relation of the movable vise jaw to the stationary vise jaw may be adjusted by threading the sleeve 4| more or less onto the threaded end portion of the piston rod 40 and this adjustment will require slacking off or taking up on the nut 44. To prevent rotation of the piston rod during the making of such an adjustment a screw or pin 45 is passed through a portion of the casting 26 and enters a longitudinally extending slot 46 in the piston rod. A rod 41 passes through the center of the sleeve 4| and at one end abuts the inner end of the piston rod 40 and at its other end is abutted by a screw 48 which when tightened forces the rod against the end of the piston rod, exerting a pressure to somewhat upset the threads between such rod and the sleeve 4| whereby such parts are securely connected. against relative movement.

Piston 39 is actuated back and forth to shift the movable vice jaw 31 to and from working clamping relation with the stationary vise jaw 29. This may be accomplished by means of fluid under pressure, as for example air under pressure, introduced into the cylinder as will later more fully appear through tubes 49 and 50. Actual work engaging blocks may be arranged between the vise jaws and the configuration and size of such blocks depends upon the shape of the particular work piece.

Cutter carrier I6 includes a plate 52 comprising or including a lug 53 passing through the front wall 54 of the slide I5. Through lug 53 is threaded a screw 55 having bearing in the top wall 56 of the slide I5 and having its outer end 51 shaped for engagement by turning tool. With this arrangement it will be understood that on turning the screw 55 the plate 52 may be raised and lowered relative to the slide I5 and the cutter carrier being mounted on such plate, the cutter will also be raised and lowered.

On the forward side of the plate 52 is a plate 58 having elongated openings 59 therein and through which extend bolts 60 having their heads 60a located in vertical slots in the front wall 54 of the slide. These bolts thus secure the plate 58 to the plate 52 but owing to the presence of the slots 59 the former plate may be adjusted laterally on the latter.

A bearing 6| is secured to plate 58 and supports one end of an arbor or shaft 62 the other end of which is received by a chuck 63 carried by a head 64. Shaft 62 carries any kind or number of cutters 65 depending on the work to be performed. Chuck 63 is partly received in a tapered socket 66 in the outer end of a tubular shaft 61. By means of a bolt 68 the chuck is drawn into the socket to grip the shaft 62. On the tubular shaft 61 is a bevel gear 69 meshing with and driven by a bevel gear I0 whereby the cutters 65 arerotated. The manner in which the bevel gear I0 is driven will later be set forth.

A motor II provides the power for operating the machine and such motor on its shaft carries a pulley I2 over which is trained belts I3 driving a pulley I4 on a shaft I6. This shaft is mounted in bearings 11 and extends rearwar-dly of the machine into a gear casing 18 normally closed at the rear side of the machine as by a cover I9. Within the gear casing the shaft carries a gear and a larger gear 8|. On the rear side of the pulley I4 and also on the shaft I6 is a relatively small pulley 82 which through a belt 83 drives a pulley 84 operating the pump 85 for circulating any or the usual cutting compound or cool-ant.

Mounted to extend through the rear wall of the gear casing I8 are shafts 86 and 81 arranged parallel with one another and with the shaft I6 and carrying gears 88 and 89 meshing with the gears 80 and 8| respectively of the shaft I6. All the gears within the casing I8 are change or pick-off gears whereby the speed ratios may be changed as found desirable.

Also on the shaft 86 is a pulley 90 which through belts 9| drives a pulley 92 supported by a bracket 93 secured to the rear corner portion of the machine bed I3 as by bolts 94. Fig. 10

shows this bracket and the mounting of pulley 92 and it is noted that the bracket includes bearings 95 for the pulley shaft 96. Shaft 96 before the forward most bearing 95 is received in cup-like member 91 which is pivotally connected at 98 to a stud 99 fastened by means of a pin I00 or otherwise in one end of a sleeve IOI. Said sleeve carries keys I02 engaging in splines I03 of a shaft I04, the opposite end of which is attached or fixed to a cup I05 by a pin I96.

A pin I01 pivotally attaches the cup I05 to a second cup I 08 receiving the outer end of the shaft I09 which mounts the bevel gear I0 located within the cutter head 64 above referred to. The described construction provides a flexible extensible drive shaft between the Pulley 92 and the cutter head 64 and with this construction it will be clear that so long as the pulley 92 is driven the cutters 65 will be rotated and this regardless of any adjustments of the cutter carrier I6 to which said cutter head 64 is secured by a pair of bolts 60 as best shown in Fig. 2.

On the rear portion of the shaft 81 above mentioned is a pulley IIO over which is trained belts III extending upwardly at the rear of the machine and driving a pulley II2 tumable about a shaft II 3. In connection with the belts 9| and I II it is noted that the upper wall II of the base I0 is provided with openings II4 for the passage of belts. On the shaft H3 is a clutch means 5 one element I I6 of which is adapted to be shifted into and out of engagement with the other element III thereof on the rocking of a yoke II 8 pivotally mounted at 9.

To the lower end of an arm I20 of the yoke II 8 the rear end of a rod |2I is pivotally connected at I22 and such rod extends to the forward end of the machine where it is provided with a knob or handle I23. As this rod is shifted longitudinally the yoke H8 is rocked to engage or disengage clutch elementsl I6 and I I1. Clutch element II 6 is secured to rotate with the shaft II3. Therefore when such element is being rotated from the pulley II2 through element II! the shaft I I3 will be rotated.

A lug I24 on the yoke I I8 engages with a spring pressed plunger I25 carried by the bed portion I26 of the machine. It will be clear that as the yoke H8 is rocked to snap its lug I24 to one side or the other of the plunger I25 the latter will act to retain the yoke in its new position. However, this holding action of the plunger is easily overcome on manipulation of the rod I2I.

Brackets I21 on the upper side of the bed I3 toward the rear end thereof support a cam shaft I28 extending transversely of the machine in the rear of the slide I5. Secured to such cam shaft is a worm gear I29 with which meshes a worm I35 on the shaft II3. With this arrangement it will be clear that when the clutch elements H6 and H1 are engaged the cam shaft I28 will be driven.

A cam I3I on said shaft (this cam is shown in Fig. 13) abuts a roller I32 mounted by a member I33 secured to the slide I5. The securing means in this instance comprises a screw I34 adapted to be adjusted on the turning of a nut I35 whereby to locate the roller I32 with respect to the slide. The rear portion of the slide is stepped whereby it has rear wall portions I36, I31 and I38 so that the parts I33, I34 and I35 while attached to the wall portion I 36 are actually located between other portions of the slide.

The weight I 39 on which any required additional weights I46 may be disposed is secured by a chain or other flexible means to the slide at I42. Chain I4I is guided by pulleys or rollers I43 and it will be clear from an inspection of Fig. 6 that the weight tends to move the slide I toward the cam shaft I28 and thus to keep the roller I32 against the cam I3'I. Thus it Will be understood that as the cam shaft turns the cam acts to move the slide I5 and thus the cutter carrier I6 and the cutters 65, toward the work holding vise 30'to have the cutters engage work held by such vise. As the high point of the cam recedes from the roller the weight I39 imparts return movement to the slide and parts carried thereby, retracting the cutters.

It will be understood that'the shape of the cam I3I will be varied depending on the work to be performed and attention is invited to the fact that the cam is in two 'pieces or sections being split along the lines I44 whereby it is easily removable from the shaft I28 for replacement. In practice the cam is secured in place. by screws I45 which pass through openings I46 in the'cam and enter a hub I41 permanentlysecured-to. the cam shaft.

Indexing movement of the casting 25 in the ways 24 whereby the vise means 34 is-moved to- Ward and from the vise means 36 to feed work thereto (as will be described) is controlled by a cam I48 (shown also in Fig. 12) on the cam shaft I28. Cam I48 is provided with a groove I49 in which islocated a roller I53 secured to the upper end of a bar I5I having rack teeth I52 meshing with the teeth of a pinion I53 on the rear end of a shaft I54 extending longitudinally of the machine.

With this arrangement it will be apparent that as cam I 38 is rotated the bar I5I will be raised and lowered or reciprocated vertically and will impart an oscillating movement to the pinion I53 and thus to the shaft I54. At its forward end, shaft I54 is splined as a I55 andv this splined portion passes through the hub of a segment I56. Thuswhile the segment may move along the shaft it is so secured to it that as the shaft is oscillated in the manner above described the segment will be given similar movement.

Segment I55 meshes with the teeth of a rack bar or slide I51 mounted for movement in directions parallel with the ways 24 and supported in the slide I8 above described as adjustable longitudinally of the machine on turning of the screw 28. Such slide I8 includes a pair of spaced portions I53 and I59 through which the forward end of shaft I54 passes and between which is located the segment I56 on saidshaft.

Rack bar I51 is cut out or provided with recess I60 into which depends pins I6I and I62 carried by the casting 25. A screw I63 carried by the rack bar is adjustable relative thereto but as shown in the drawings is in engagement with the pin I6I. With this construction it will be clear that on the segment I56-being rocked toward the left in Fig. 9the rack bar will be shifted in that direction and will carry the screw I63 with it and the latter engaging the pin I6I the casting 25 will be moved towardthe left along the ways 24 carrying the vise means 34 away from the vise means 30.

The extent of this throw of the vise means is determined by the adjustment of the screw I63 since it will be clear that if in the normal posi-- tion of the parts this screw is spaced from the pin ISI then a part of the throw of the rack bar will be expended in bringing the screw up into engagement with'said pin. A bracket I64 carries an adjustment screw I55 which is adjusted in accordance with the adjustment of the screw I63 so as to be engaged by the casting 25 at the limit of its movement whereby there will be no overthrow of the casting but the latter will be given anexact movement and at the extreme of its movement will be held between the screws I63 and I65.

The second above mentioned pin designated I62 is shown engaging an adjustable screw I66 threaded into a sleeve I61 which passes through a pocket I68 in the rack bar and which has a head I69 bearing against one end portion of a coil spring I10" located within said pocket.

A pin I61'a prevents turning of the sleeve during adjustment of the screw I56 therein. On return movement of the segment (that is as it is moved in a clockwise direction following movement in a counter-clockwise direction) the screw I56 engages the pin I52 and shifts the rack bar toward the right as viewed in Fig. 9. A hardened lug III on the casting 25 is located to engage an' adjustable stop screw I12 at the limit of the return movement of casting 25 and vise means 34 and any overthrow in the segment results only in compression of the spring I18 as the screw I66 is forced against pin I62. In this way return movement of the vise means 34 to a predetermined position is assured. It is noted that the Vise jaws are somewhat wider than the blocks 29 and 33 (see Fig. 9) whereby the bar of stock comprising the work may be fed from the movable to the stationary vise means down to the last small part.

As above suggested the vise means 35 and 34 are both opened and closed by the use of compressed air. The latter is distributed under the control of a valve I13 in turn controlled by a cam I14'(see Figs. 4, l1 and 14) secured on the cam shaft I28. The track of this cam in which is located a roller I15 on the upper end portion of a valve stem I15- is so arranged that the valve stem moves through a cycle involving three posi tions of which the first and third positions are the same while the second and fourth are different. The valve stem I16 is provided with rack teeth I11. meshing with the teeth of a segment I18 on the stem of a valve element I19. With this arrangement the valve element I19 is advanced through three steps above suggested. It is advanced from the first to the second position and then back to the first and then to the fourth.

The arrangement and the timing are such that during a cutting operation both vise means are closed and gripping or clamping the work and. at such time the vise means 34 is spaced from the vise means 30 having been indexed outwardly from the latter but being closed and gripping the bar constituting the work. When the cutters have finished their work they are moved rearwardly with the slide I5 and the jaws of the stationary vise means 30 are opened and the vise means 34 is indexed inwardly toward the vise means 30 feeding a new piece of work to the latter and possibly using the new work to force the finished piece out of the stationary vise means. Thereafter the stationary vise means is closed to grip the work and the index vise means is then opened or released from the work and moved outwardly to grip the bar of work in a new place.

Cam I14 moves in the direction indicated by the arrow I8! and the cycle of operation of the vise means is illustrated in Figs. 15, 16 and 17 wherein Fig. 16 schematically illustrates the position of the valve element I19 and the conditions of the vise means during the mentioned first and third steps of the machines operating cycle. Valve element I19 is supplied through its center port I82 with air under pressure and it is adapted to distribute this air through ports I83, I84, I85 and I86. The element is also provided with exhaust ports I81, I88, I89 and I90. These various ports are adapted to register with ports I9I, I92,

I93 and I94 in the casing I95 of the valve.

For the purpose of this description the cutting operation is considered as the first step in the cycle of the machines operation. Therefore attention is directed to Fig. 16 wherein it is as sumed that the roller I15 is in the dwell I80 of the cam groove. In Fig. 16 it will be noted that owing to the extensions on the ports I81 and I84 the work holding vise means 30 is closed due to the introduction of air under pressure into the cylinder 35 through pipe 49 from the port I84, and the exhausting of air from the other end of the cylinder through pipe 50 to the exhaust port I 81. In addition because of the extensions on the ports I86 and I89 air under pressure is now being supplied to the forward side of the piston of cylinder 36 through pipe I91 and exhausted from the outer side thereof through pipe I96. Thus both vise means are closed or in clamping relation.

Now as the cutting operation is completed roller I 15 is engaged by a rise I98 of the cam groove and elevated thereby with the result that valve element I19 is rocked to the position of Fig. 17. There, due to the location of the ports I83 and I90 air is now being supplied to the outer side of piston 39 and exhausted from the inner side thereof so that the stationary vise means 30 is opened. At this time the movable vise means 34 remains closed gripping the work since the efiective relation of the ports I86 and I89 with the pipes I91 and I96 remains the same. Now the cutters having been moved back from the work the vise means 34 is indexed inwardly to feed new work to the vise means 30 andthis operation takes place while the roller I15 is in the dwell I80a of the cam groove. The piece of work which has been completed may fall onto the chute 200 for removal from the machine.

A new piece of work having been fed to the stationary vice means roller I15 is engaged by the rise I99 of the cam groove and the valve element I19 rocked back to the position of Fig. 16. Rise I99 efiects a counter-clockwise movement of the valve element and such movement of said element does not change the supply of compressed air to the cylinder 36 but it does reverse the feed to the cylinder 35 with the result that the jaws of means are closed to grip the work. This relation at this particular point in the cycle of the machine's operation lasts but a short time, only while the roller I15 is in the short dwell I80b of the cam groove. In fact the gripping of the work by both vise means at this time comes about only since it is desirable that the vise means 34 maintain a grip on the work until after vise means 30 closes.

Next a rise 20I of the cam groove engages roller I 15 rocking the valve element I 19 further in a counter-clockwise direction. This moves element I19 to the position of Fig. 15 from the position of Fig. 16 and does not change the efiective relation of the ports I 84 and I81 with the cylinder 35 so that vise means 30 remains closed. However, it does result in port I 85 supplying compressed air to the outer end of the cylinder 36 and in port I88 permitting the exhausting of air from the inner end of said cylinder. Thus vise means 34 is opened. Now as the roller is in dwell I80c of the cam groove the indexing vise means 34 is moved outwardly to a new position with respect to the work (the throw being effected by the rack I51 and its associated parts as above set forth) and the cutters may start back toward the Work.

Thereafter rise 202 engages roller I15 and elevates the same and the valve stem I16 rocking the valve element I19 back to its first position as in Fig. 16. There the vise means 30 remains closed and the supply of compressed air is so directed that vise means 34 is closed and thus both such means are gripping the work as the roller is back in dwell I and the cutters 65 are functioning. From this it will be appreciated that dwells I80 and I80b are the same radial distance from the center of the cam I14.

Having thus set forth the nature of my invention, what I claim is:

1. In a milling machine, a base, work holding and indexing means on said base in position to support work to be engaged by a cutter, said indexing means comprising a pair of vises in sideby-side relation of which one is arranged to hold the work during engagement thereof by the cutter, means mounting the other of said vises for sidewise bodily movement toward and from the first vise to index the work longitudinally thereto, and means for causing opening and closing of'said vises in timed relation with one another.

2. In a milling machine, a base, work holding and indexing means on said base, said work holding and indexing means comprising a stationary means for gripping the work during engagement thereof by a cutter and said indexing means comprising a vise in side-by-side relation with and bodily movabl laterally toward and from said holding means to index the work longitudinally thereto, means for so moving said vise, and means for causing opening and closing of said vise and work holding means in timed relation with one another.

3. In a milling machine, a base, work holding means on the base for supporting work during engagement thereof by a cutter, means for feeding work to said holding means, said feeding means comprising a vise, means mounting said vise in side-by-side relation with and for sidewise bodily movement toward and from said holding means to index work longitudinally thereof, means for so moving said vise, and means for causing opening andclosing ofsaid vise and holding means in timed relation with one another.

4. In a milling machine, a base, work holding means on the base for supporting work during engagement thereof by a cutter, means 'for feeding Work to said holding means, said feeding means comprising a vise, means mounting said .vise for bodily movement toward and from said holding means, means for so movingsaid vise, means for causing opening and closing of said vise and holding means in timed relation with one another, and said means for moving said vise including adjustable means whereby the amount of movement or the stroke of the vise and thusthelength of the work fed the holding means maybe varied.

'5. In a milling machine, a base, means for holding .work to be engaged by a cutter, means for feeding work to said holding means, said last means including a vise,.means mounting the vise for bodily movement toward and from said holding means, a bar, power means for imparting a reciprocating movement to said bar, spring means to compensate for over throw of said power means during return movements of said bar, means connecting said bar with said vise for imparting movement to the latter, and means for opening and closing the vise and holding holding work to be engaged by a cutter, means for feeding work to said holding means, said last means including a vise, means mounting the vise for bodily movement toward and from said holding means, a bar, a projection on the vise, a. screw on the bar and adjustable relative thereto, means for moving said bar in one direction to have said screw engage said projection and force the vise in said direction, means for imparting return movement to said vise independently of said screw, and means for opening and closing the vise and holding means in timed relation to oneanother and to such movements of the vise.

7. In a-milling machine, a base, a cam shaft mounted transversely of said 'base at one end thereof, a motor, gear driven from th motor, means including clutch means for driving said cam shaft from said gear, .workholding and indexing means adapted to hold and index work for engagement by a cutter, said workholding and indexing means comprising a stationary vise for gripping the work during engagement thereof by a cutter and a movable vise bodily shiftable toward and from the stationary vise for indexing the work thereto, a cam on said cam shaft, a rack bar mounted for vertical reciprocating movement, means whereby such movement i imparted to said rack bar by said cam, a shaft extending from a position adjacent said cam shaft to a position adjacent said movable vise, gear means on said shaft and meshing with said rack bar whereby as the latter is reciprocated the shaft is oscillated, a rack bar having driving connection with said movable vise, gear means on said shaft and meshing with the second mentioned rack bar whereby as the shaft is oscillated the second rack bar is reciprocated and causes shifting of the movable vise toward and from the stationary vise, and means for causing opening and closing of said Vises in timed relation with one another and with the shifting of the movable vise,

8. In a milling machine, a base, a stationary vise on said base for holding work during engagement thereof by a cutter, a movable vise for feeding a bar to-the stationary vise, a rack'bar, means -mounting saidrackbar for movements-in the direction in which said movable vise is -movable, a pair of pins rigid with said movable vise, a pair of screws movable with said rack bar and each engageable with one of saiclpins asthe rack baris moved back and forth whereby the movable vise is shifted back and forth onsuch movement being imparted to the rack bar, said screws adjustable relativeto the rack bar wherebythe extent'of movement of the movable vise may be varied and whereby to compensate for wear between the pins and screws without varying the stroke of the rack bar, a shaft, asegment onsaid shaft andmeshing with said rack bar, means for oscillating said shaft, and means for causing opening and closing of said Vises in timed relation with one another and with the shifting of the movable vise toward and from the stationary vise.

9. In a milling machine, a base, a stationary viseon theibase'for holding work during engageiment thereof by a cutter,a movable vise for feeding'abar'of work'to the stationary vise, means 'mounting said movable vise on the base for movement toward andfrom the stationary vise, means for so moving said movable vise, said last means including a slide mounted on the base for reciprocating movement in the directions in which said movable vise is shiftable, means for so movingsaid slide, ,a screw carried by said slide and engageable with the movable vise as the slide is moved in one direction whereby suchmovement of the slideisimparted'to said vise, a second screw 'movable with the slide and.engageable with the said'movable ,vise during return movement of the slide whereby such movement is imparted to said vise, said screws ,adjustablerelativeto slide whereby the amountof movement ofsaid movable vise may be .varied without varying the stroke ofthe 'slide, and means for causing opening andv closing of said vises in timed relation with oneanother and with movement'of the movable vise toward and'fromthe stationary vise.

'10. In a milling machine, a base, a stationary vise on .a base for holding work during engagement thereof bythe cutter, a movable vise for feeding aQbar of work to the stationary vise,

means mounting said movableviseonthe'base for movement toward and from the stationary vise, means for so moving said movable vise, said last means including a slide mounted on the base for reciprocating movement in the directions in which said movable vise is shiftable, means for so moving said slide, a screw carried by said slide and engageable with the movable vise as the slide is moved in one direction whereby such movement of the slide is imparted to said vise, a second screw movable with the slide and engageable with the said movable vise during return movement of the slidewhereby such movement is imparted to said vise, said screws adjustable relative to slide whereby the amount of movement of said movable vise may be varied without varying the stroke of the slide, means for causing opening and closing of said Vises in timed relation with one another and with movement of the movable vise toward and from the stationary vise, adjustable means providing a positive stop limiting movement of the movable vise in a direction away from th stationary vise, and other adjustable means positively limiting return movement of the movable vise toward the stationary vise.

11. In a milling machine, a, base, a stationary vise on the base for holding work during engagement thereof by a cutter, a movable vise for feeding a bar to the stationary vise, means mounting said movable vise on the base for movement toward and from the stationary vise, means for so moving said movable vise, said last means including adjustable means whereby the stroke of the movable vise may be adjusted, and means for causing opening and closing of said vises in timed relation with one another and with movement of the movable vise toward and from the stationary vise.

12. In a milling machine, a base, a stationary vise on the base for holding work during engagement thereof by a cutter, a movable vise for feeding a bar to the stationary vise, means mounting said movable vise on the base for movement toward and from the stationary vise, means for so moving said movable Vise, each of said vises including a stationary and a movable jaw to clamp work between them, a piston and cylinder assembly of which the piston is connected with the movable jaw, and means for supplying fluid under pressure to said cylinders at the respective sides of the pistons in predetermined timed order for causing opening and closing of said vises in timed relation with one another and with movement of the movable vise toward and from the stationary vise.

13. In a milling machine, a base, work holding and indexing means on said base, said work holding means comprising a stationary means for gripping the work during engagement thereof by a cutter, said indexing means comprising a vise in side-by-side relation with and bodily movable laterally toward and from said holding means to move work longitudinally thereto, means for so moving said vise, said vise including stationary and movable jaws and a piston and cylinder assembly of which the piston is connected with the movable jaw, means for supplying fluid under pressure to said cylinder at opposite sides of said piston to cause opening and closing of the jaws in certain timed relation to the movements of the vise, and means for causing opening and closing of the holding means in timed relation with said movement of the vise.

14. In a milling machine, a base, a cam shaft mounted on the base, a motor, a gear driven from the motor, means including intermediate clutch means for driving said cam shaft from said gear, work holding and indexing means on said base at the forward end of said slide, said work holding and indexing means comprising a stationary means for gripping the Work during engagement thereof by the cutter and said indexing means comprising a vise bodily movable laterally toward and from said holding means, means for so moving said vise, means for causing opening and closing of said vise and work holding means in timed relation with one another, said last means including piston and cylinder assemblies, means for supplying fluid under pressure to the cylinders of said assemblies at opposite sides of the pistons thereof in certain timed order to bring about such opening and closing of the vise and work holding means, a valve controlling the supply of said fluid under pressure to said cylinders, and means including a cam on said cam shaft for operating said valve.

15. In a milling machine, a base, a slide on the base, acutter carrier on the slide, a cutter on the carrier, work holding means on the base forwardly of the slide, a driving shaft extending forwardly of the machine at the side of the slide and at its forward end connected to drive said tool, a pulley connected with the rear end of said shaft, a bracket supporting said pulley and said end of the shaft, a cam shaft at the rear of said slide, a cam on said shaft for moving the slide to carry the cutter toward said work holding means, a motor in said base, a shaft at the rear of said base and substantiallyin the longitudinal center thereof, a pulley on said last shaft, a belt driving said pulley from the motor, a pair of gears on said shaft, a pair of shafts arranged parallel with the central shaft but located at opposite sides thereof, a pick-off gear on each of said pair of shafts, said gears meshing with the respective gears on the central shaft, a pulley on each shaft of said pair, a belt trained over one of said pulleys and the first mentioned pulley whereby said motor drives the cutter, a shaft extending at right angles to and below said cam shaft, a worm and worm gear driving connection between said shaft and the cam shaft, a pulley on the shaft below said camshaft, and a belt trained over the last named pulley and the pulley on the other of said pair of shafts whereby the motor drives the cam shaft.

NEWMAN M. MARSILIUS.

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