US1414166A - Typewriting machine - Google Patents

Description

E. E. BARNEY. TYPEWRITING MACHINE.

APPLICATION FILED OCT. 26, I920.

Patented Apr; 25, 1922.

4 SHLEIS-SHEET I.

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1 m J 1 w d ml INVENTUR WITNEEEEEI Hi5 ATTURNEY E. E. BARNEY.

TYPEWRITING MACHINE.

APPLICATION FILED OCT, 26, 1920.

- WITNESSES 4 SHlzETSSHEET Z.

Patented Apr. 25,1922.

HIS ATTORNEY E E. BARNEY.

TYPEWRITING MACHINE.

AFPITICATIQN FILED OCT. 26, 1920.

Patented Apr. 25, 1922.

4 SHLETS-SHEET 3.

INVENTEIR M 5 5 WITNESSES HIS ATTURNEY E. E. BARNEY.

TYPEWRITING MACHINE. APPLICATILIN FILED ocr.2s,192o.

Patented Apr. 25, 1922.

4 SHEETSSHEET 4,

Inn

WITNESSES 7%. M

INVENTUH M;

HIS ATTORNEY UNITED STATES PATENT o-FFIcE- EDWIN E.- BARNEY, OF NEWARK, NEW ASSIGNOR TQ REMINGTON TYPE- WRITER COMPANY, OF ILION, YORK,; A CORPORATION OF NEW YORK.

- 'ryrnwnrrme MACHINE.

To all whom it may concern} Be it known that I, EDWIN E. BARNI'QY,

.citizen of the United States, and resident of Newark," in the county of Essex and State of New Jersey, have invented certainfnew and useful Hnprovements in Typewriting Machines, of which the following is a specification.

My present invention relates towarriage feeding or escapement devices for typewriting machines, and its principal object is to provide new and improved devices of the character specified and which are particularly adapted to cure defects heretofore en countered when the space key has been operated.

' taken on the plane indicated by the dotted line t-t in Fig. 2. Figure 4 is a view corresponding to Fig. 3 but showing the parts in a different relationship. i I

Figure 5 is a horizontal, vertical, sectional view taken on the plane indicated by the dotted line 'vc in Fig. 4

Figures 6 and 7 are views corresponding to Fig.2 but showing different relationships of the e'scapement devices.

' ,Figures' 8 and 9 are horizontal, sectional views taken respectively on planes indicated I by the dottedlines 'w'wii1 Fig. 6'.and.w'w

in Fig. 7. I (I Figure 10 is a fragmentary perspective view showingpart of the escapement release connections.

Figure 11 is a vertical, sectional view j taken on a plane indicated byt he dotted line y-y in Fig. 2, and looking in the direction of thearrow at said line.

Figure 12-is a fragmentary, vertical, sec- Specifica'tion of Letters latent.

particularly point- ,erates with astationary gui e bar 7 which e-xtends'cross wise of the machine and is securedby screws Patented Apr. 25, 1922.

Application filed October 26, ieaofimenal 110 19345.

tional view corresponding-in partto Fig. 11

but showing certain of the ent-relationship. t

Figure 13 is a vertical, sectional view taken on a plane indicated by the dotted line 2-2 in Fig. 11, and looking in the direction of the arrow at said line.

t Figure 14: is a perspective view of a dea1 I In the horizontal sectional views, the esdevices in a difl'ercapement wheel is represented by a Wheeltooth in section.

Referring first to Fig. '1, the main frame of the typewritingmachine illustrated there- 1n comprises side plates or frames 1 which are connected atthe front by a U-shaped frame 2 that encloses the keyboard, and at the rear by a cross ,p-late, not shown, but to which the side are rigidly connected. Arrangedfor reciprocation above the main frame is a traveling carriage prefer-' ably power driven by spring drum mechanism of the character disclosed in my application Sr. No. 364,644.,filed March 10, 1920, said carriage comp-rising an inclined plate or bar 3, to the ends of which are secured forwardly extending side or end plates 4.- .The top and bottom of the plate 3. are formed withgrooved ball-seatsor runways 5 which receive sets of anti-friction prior rollers 6.. The upper set of rollers 6. co-op- .0Ved ball-seat formed in a 8 to the upper end portion of an angular bed plate, or support 9, which is mounted on the upper rear end portions of. the frame plates 1 and is suitably secured thereto. The

guide bar 7 is fixed to thetop of the vertiing carriage 3, 4 is a roller platen 10 withwhose frontface co-operate type bars or printing instrumentalities 11. The set of typebars'are arranged in an arc of a 011- cle below the platen and are normally horizontally disposed, their free-ends resting on.

a pad '12 mounted on a curved rest or support 13. At their rear said type bars. are pivoted on a pivot wire 14, common to all of the type bars and mounted on a vertical type bar support or segment 15. Each type bar is provided, forward of its pivot, with a contact face 16 for co-operation with the carriage feeding or escapement devices, and has below its pivot an inclined cam slot'17. Engaging with the slot 17 is a headed pin 18 projecting laterally from the free end of the longer arm of a. bell crank 19, the series of hell cranks 19 being arranged inguide slots 20 formed in the support 13 at its rear, the bell cranks having a common pivot wire 21 mounted on said support. The shorter arm of each bell crank 19 is connected by a. link 22 with an angular lever 23 pivoted at 24 in a sub-frame. 25 detachably mounted in the base or lower portion of the main frame. Each angular lever 23 is provided with a headed pin 26 which engages in a slot 27 formed in the rear arm of a key lever'28, the set of key levers extending forward and being pivoted-on fulcrum wires 29 mounted in the sub-frame. its forward end in an upright stem portion which is provided with a. cap or key 30. It will be understood that when one of the printing keys 30 is depressed it will actuate its. key lever 28 and the connected lever 23, causing the associatelink 22 to swing its bell crank 19 on its pivot so that the actuating pin 18 will operate the associate type bar 11, said type bar being swung upward and rearward into printing contact with the platen 10 and the paper thereon.

During printing movements-the type bars will actuate the carriage feeding mechanism or escapement devices which are in themselves novel and which areconnected with and control the carriage through new and improved connecting mechanism best shown in Figs. 1 and 10 to 14. This connecting mechanism is not claimed per se herein as it is the invention of John H. Barr, being disclosed and'claimed in his pending application, Sr. No. 423,629, filed November 12,

1920. Suitably supported on the carriage, 4, is a feed rack 31 which constantly meshes with a feed-pinion 32 that is mounted on a horizontal shaft 33. The end portions of said shaft are reduced, as indicated at 34, to co -operate with sets of anti-friction balls 35, the set of balls at the rear being seated in aball-cup or bearing 36, the outer face of which is threaded so that the ball-cup may be screwed into a downwardly projecting portion of the bed plate 9, the bearing member 36 being provided with a nick 37 to accommodate a screwdriver. A check nut 38 retains the bearing member 36 in adjusted position. A ball retainer in the form of a split ring 39 is received in a groove in the seat-portion of the member 36 and prevents displacement of the balls 35. A similar ballcup or bearing member 40 is threaded into a front downwardly extending portion of the bedplate 9' and seats the front set of is loosely confined between 25. Each. key lever terminates at balls 35 which" are retained in place by a split ring retainer 41. A check nut 42 holds the front ball-cup 40 in adjusted position.

Said shaft 33 is provided with a flange 33 and a bearing face 33 which is somewhat larger than the left end portion of the shaft on which-the pinion 32 bears. Said pinion the enlarged bearing portion 33 and a circular retainer 43 which may be of wire bent circularly and. seated in a groove 44 in wheel 45, which is provided with the shaft 33. The escapement pointed teeth 46 beveled at their rear faces as indicated at 47, is mounted on the bearing portion 33 0f the shaft and is held in fixed relation therewith by rivets 48 which are received in openings formed in the body of the escapement wheel and in the flange 33 Preferably there are four of these rivets, it having been found that these will firmly secure the escapement wheel to the flange and maintain said wheel inrigid relationship with its shaft The escapement wheel 45 and flange 33 project upward through an opening 9 in the horizontal feed'pinion 32 with the co-operate with the teeth of the pinion 32.

At its tooth end the pawl member 49 is perforated to receive a rearwardly extending pin 52, which is suitably fixed to the pawl and which has a pointed end 53. The pawl member 49 bears on a headed pin or rivet 54 which is secured to the escapement wheel 45 near its perimeter and pro ects from the front face thereof, the bearing opening 50 inthe pawl member engagingwith said pin and the pawl member being loosely confined between the head of said pin and the face of the escapement wheel. The pointed pin 52 projects rearward through an elongated slot 55 cut in the escapement wheel.- The pawl tooth 51 is constantly pressed towards the pinion 32 and is normally maintained engaged with said pinion by a semi-circular spring 56 preferably made of music wire, one end of the spring being bent around and anchored to a headed pin 57 secured to the escapement wheel, and the opposite end of said. spring being bent inward and engaging in a hole 58 in the pawl member. The consruction is such that to-and-fro -movemen s of the carriage are transmitted from the feed rack31 to the feed pinion 32, and normally leftward turning movements of the feed pinion are transmitted through I r the pawl member 49 to the escapement wheel 45 and its shaft 33. As stated, return or backward movements of the carriage are also participated in by the pinion 32.but the constructionand relationship of the pawl member 49 to the pinion is such that the pawl tooth 51 will bob in and out of the teeth of the pinion as said pinion rotates, so that its rotary movements will'not be communicated to the escapement wheel and its ,ing a sleeve 59 which' is slidably mounted on the shaft 33 behind the escapement wheel. Said sleeve is provided with two flanges 60 and 61, the front flange 60'being beveled as indicated at 62 for co-operation with the pointed end 53 of the pin 52, and said flange also being countersunk as indicated at 63 to ass over the flange 33 when the sleeve 59 1s slid forward to release the escapement wheel, as presently explained. The sliding movements of the sleeve 59 are controlled by a lever 64, which is pivoted at 65 on the right-hand end plate 4 of the carriage, said lever comprising a long forwardly and upwardly extending arm 66 terminating in a,

key (not shown) and a short downwardly extending arm 67. v The arm '66 is formed,

with a guide slot 68 which co-operates with a headed screw 69 secured to the end plate 4. The lower end of the lever arm 67 terminates in anose 67 which is adapted to engage with a release bar7O arranged behind the carriage bar 3 and extending therealong,

said release bar being provided at its ends with pintles 71 which are received in hearingmembers 72 secured to the carriagebar 3, whereby the release bar 70 depends loosely v from the carriage. The release bar 70is adapted to co-operate with an angular lever member 7 3 which cfinprises a vertical body portion 74 and two arms 75 and 76 bent angularly to thefbody and extending oppositely from the upper and lower ends res ectively of said body or cross portion 74,

he lever member'7 3 is pivoted on astationary screw pivot 77 secured to the bed plate 9 and is so arranged that the free end of the arm7 5 is contactive with the rear lower part of the release-bar-70 while the free endof the arm 76 terminates in a head 76 which fits loosely between the flanges and 61 of the sleeve 59. The construction is such that .when the lever 64 is operated by depressingv its key, it will result in swinging the bar rearward, said arm acting to swing'thelever member 73' on its pivot, causing the head. 7 6 to slide the sleeve 59-forward from trated in 12. Thisforward movement is transmitted through the bevel or cam surface 62 to the pin 52 on the pawl 49 resulting in the swinging of the pawl tooth 51 outward until-it disengages from the teeth of the pinion 32. As a conse uence the escapement wheel 45 is release position by suitable restoring spring mechanism, the pawl tooth 51 returning to engagment withthe pinion 32 by reason of the action of the spring 56.

The principal novelty of the invention as carried out in the present instance resides in the dog mechanism whi'ch has beenprovided to co-operate with the escapement or disconnected. from the carriage which will thus be free The release 4 wheel or-circular rack. Generally stated,

this mechanism comprises a dog carrier or rocker carrying three dogs or detents. Said rocker is actuated from the printing keys to cause a pair of said dogs to co-operate with the escapement wheel to produce what is known in the art as an ordinary or no drop by step on the upstroke of the printing keys during the course of printing operations.

One of said pair of dogs, together with the third dog is mounted on an anchor member or lever which is carried bythe 'dog rocker operating as an anchor escapement only from .actuations of the space bar or key of escapement, so that the carriage is fed step the machine, and when so operated causing step by step movements during depressions of the-space key,- affording 'what is called a reverse or full drop escapement- During the operation of the anchor escapement, the dog rocker remains motionless, serving merely as a pivot for-the anchor member which vibrates transversely of, the path of movement of the rocker and the escapement wheel. "The purpose of this novel construction is primarily to prevent what is known as a spread or the striking of the first character of a word at the point or place on the the ordinary or no 'ClI'Op escapement as it has heretofore usually been constructed, the space key, as well as the printing keys, has operated so that no movement or substantially no ovement of the carriage has been afforded on the downstroke or depression,-

a substantially full letter space movement or 'step resulting on the return or upstroke;

These prior constructions have been inherently slow because of the fact that operators 65 the Fig. 11 position to the position illusare not usually so speedy with the thumb as with the fingers, the thumb being employed to actuate the space bar; and for this reason, as well as for the further one that there is a common tendency on the part of operators to dwell on the space bar, liability to produce spreads is quite prevalent. Obviating this defect and substantially preventing spreads is accomplished in the present instance by providing a space key mechanism which changes or varies the time of let-off, causing a full letter space movement when the space key is depressed and which does not as heretofore require that the space bar shall return towards normal position to effect such movement. As a consequence spreads are avoided since even should the operator dwell-on the space bar at the bottom of the stroke the spacing of the carriage will nevertheless have been previously accomplished. A further improvement resides in so constructing the novel devices as that the printing keys may be operated while the space bar is held depressed without interfering with the proper functioning of the letter spacing mechanism.

Also should the operator chance to actuate the space bar before releasing one ofthe printing keys means are provided whereby the actuation of the space key is not blocked or prevented.

Referring specifically to the means by which the above stated results. are accomplished in the present case, there is provided a dog carrier or rocker which is in the form of a plate, best shown in Figs. 1, 2, 3, 11 and 13, which plate as a whole is designated by the numeral 78. Said plate or rocker frame is provided with cutouts 79 and 80 and at its lower end has; oppositely projecting lugs or ears 81which are slightly curved or off-set rearward and are formed with conical depressions 82" which receive the pointed or conical ends of bearing pins or screws 83 secured in the lower ends 011 arms 84 which are preferably integral with the bed plate 9 and extend downward therefrom at the right and left sides of the open" ing 9*. The bearing pins or screws 83' are adjustably secured in place as by set screw 85 and check nut 85*. At theupper end of the rocker 78 and preferably integral therewith is an upwardly projecting holding or fixed dog 86 which is beveled for cooperation with the front sides or corners "of the wheel teeth 46. Secured to the front face of the rocker'is a stop arm 87 provided at its upper end with a lateral stop portion 88, its lower end terminating in a T-shaped head 89 i which is perforated to receive headed securing screws 90 that are threaded into the rocker. 'Interposed between the screw heads and the T-shaped head is an angular plate 91, the lower end of which extends below the rocker and carries a rearwardly extending pin 92 to which is secured the lower end of a rocker spring 93, said rocker spring extending upward and being anchored to a finger 94 which may be part of a plate 95 that is secured by screws 96 and 97 to the left-hand arm 84. Said plate 95 further comprises fingers or extensions 98 and 99, the purpose of which will hereinafter be explained. The upper securing screw; 97 is preferably a shouldered screw and provides a pivot for a wheel detent 100 which at one end co-operates with the wheel teeth 46 to assist in preventing undue movements of the wheel and at the opposite end is provided with an off-set or stop 101 which normally is maintained against the side of the arm 84 by a suitable detent spring. Across the rear upper side of the rocker plate 78 is arranged a stop plate 102 which is secured to the rocker by screws 103 and is held spaced therefrom by spacing washers 104. This stop plate is ada ted to co-operate with the rear sides of t e wheel teeth away and beveled atits front side to afi'ord suitable clearance as will be understood from Figs. 1, 3 and 11. At its lower end the dog member 11]. terminatesin a stoppingi portion or lug 113 above which is a curved stop face 114. These stop faces 113 and 114 are adapted for co-operation with a spring stop member 115 pivoted on the pivot screw 116 to the rear face of the rocker plate, and comprising a horizontally extending arm or stop proper 117 and a downward projection, or lug 117 having a hole through which is hooked a coiled stop spring 118 extending horizontally leftward and hooked at its left end through a hole 119 formed in the plate 91 above the pin 92. The spring 118 constantly tends to swing the stop arm 117 upward and normally maintains it in a horizontal position in contact with a stop pin'120 as shown in Fig. 2. Pivoted at 121 to the outer end of the arm 108 is a third dog 122 formed at its upper end with a dog tooth 123 for cooperation with the wheel teeth .46. The dog members 111 and 122 are formed respectively with curved guide slots 124 and 125 which co-operate with pins 126 and 127 fixed to and projecting forward from the opposite ends of a controlling member or lever 128 which is pivoted on a shoulder screw 129 projecting from the rear face of the dog rocker. The two dog members 111 and 122 are connected by a coiled spring 130 which extends diagonally of the dog rocker and is hooked through a hole 131 in said dog member while the opposite end of said spring is hookedin a hole 132 in' the dog member 111 below its pivot. The effect of the spring is consequently to swing the dog teeth 112 and 123 towards the right as viewed from the rear as in Fi s. 2, 4, 6 and 7. Normally .the dog .123 wil be arrested by one of the washers 104 which acts as a stop therefor but the action of the spring 130 on the dog member 111 is normally overcome by the main spring or spring drum of the machine which is not shown herein but which may be of any suitable construction so connected with the carriage 3, 4 as to constantly urge it left- -ward, this'urge or impulse of'the spring drum or carriage motor being transmitted through the-carriage feed rack 31, feed pinion 32 and pawl or detent 49 to the escapement wheel 45 and tends to turn the teeth at the lower side constantly in the direction indicated by the arrow in Figs. 2, 4, 6 and 7 The dog tooth 112 being normally engaged with one of the wheel teeth 46 is held in the Fig. 2 position with the closed end of the slot 124 engaged with the pin 126 which acts as a sto for the stepping dog 111. The dog toot 112 is normally held up in the path of the wheel tooth 46 I through the action of a coiled spring 133 hooked at one end through a hole in the arm 10 the anchor member, the opposite end of said pring being anchored to the-pin 92. Sald spring normally maintains the arm 108 in contact with a stop pin 134onthe rocker 78. The dog rocker and the parts mounted thereon are adapted to be swung or vibrated fore and aft of the machine when the printing keys 30 are operated, movement from the printing keys to the dog rocker being transmitted in the present instancethrough the type bars whose contact faces 16 are adapted to co-operate with the front edge of a universal bar 135-illustrated in 1. Said universal bar is arcuate in shape and is housed in a seat or depression 136 in the"r.e'ar of the type bar segment 15. Since the universal bar and the train of operating connections to the dog rocker are not claimed in the'present case they will be but briefly described. Near its ends the universal bar 135 has rearward extensions 137 which are pivotally connected at 138 with crank arms 139 fixed to a shaft 140 from which said crank arms project upward.

Centrally the shaft 140 has a rearwardly ex-- tending crank arm 141. The lower middle portion of the universal bar 135 is provided with a rearwardly extending arm 142 carrying afcontact devices or upturned rear end portion 143, which is adapted to engage with an adjustable contact screw 144 secured to and projecting forward from the free end of a crank arm 148 fixed to a pivotal axis 149 which also carries'a rearwardly extending crank arm 150. The crank arms 150 and 141 are connected by a link 151, which together with the crank arms 141 and 150' and'the crank arms 139 and 148 synchronizes the movements of the universal bar frame comprising the curved universal bar 135 and its rearward extension 142. This frame is supported from the axes 140 and 149 which are so mounted that they '80 participate in any case shifting movements to which the type barsegment 15 may besubjected, the result being that the universal bar at its front edge is always in position normally to receive actuations from the con-- tact devicesor edges 16 of the type bars.

The universal bar frame is provided with a coiled restoring spring 152 which is horizontally disposed and at its rear end is hooked over a pin 153 projecting upward from the arm 142. The forward end of said spring isfixed to .an adjustable anchorage. 154 mounted on a pin or screw 155 supported on an arm 156 fixedly connected to and extending downward behind the type 'bar segment 15. The spring 152 normally maintains the universal bar in contact with the front wall of the depression 136 and at this time the contact 144 on the dog rocker is contiguous to the end portion or contact piece 143 of the universal bar, the dog rocker being maintained in this position normally by its spring 93. When one of the printing keys 30 is depressed it acts through 'the train of type bar actuating devices to swing the connected type bar to operating position in contactive engagement wlth the platen and causes the contact face of said type bar acting against .the uni versal bar to move the latter rearward against the pull of the spring 152, this movement being transmitted through the screw 144 to the dog rocker which at this time is in the :normal position illustrated in Figs. 1-3 where said rocker is maintained by'its spring 93 which acts to hold screw stop 98* against the'rear face of the finger or stop 98. The universal bar moving rearward will act to swing the dog rockerrearwardfrom the Figs. 1-3 position to the Figs.

4-5 position. As a result of this rearward swinging movement of the 'dog rocker the dog tooth 112 f the'stepping dog will be swung rearward out of the path of the wheel tooth 46-with which it had been en- 125.

gaged, and the holding dog 86 will, be brought into. engagementlwith said wheel tooth. The dogs 112 and 86 are so related that this swinging movement of the dog rocker due to t e depression of one of the printing" keys 30, and the consequent disengagement of the dog 112 from the wheel tooth and the engagement of the dog 86 with saidtooth results in no drop, or substantially no drop,-that is to say, said wheel tooth will not movevto any appreciable extent and there will consequently be no movement of the carriage in letter feed .direction. When -the dog tooth 112 swings rearward clear of the wheel the spring 130 will become effective to swing the tooth rightward as viewed from the rear, the dog member 111 turning on its pivot 110 until arrested by contact of the lower end portion 113 with the end of the stop arm 117. When thus arrested the dog 112 will be in register with the tooth space to the right of that wheel tooth with which it had previously engaged (viewed from the rear). onsequently as the dog rocker swings forward towards normal position under the impulse of its spring 93, which forward swing will take place during the, return or upstroke of the depressed printing key 30, the es capement wheel freed from the control of the holding dog 86 will turn in the dime-- tion of the arrow, Fig. 4, causing the dog tooth 112 to be engaged by the advancing wheel tooth and the dog member 111 to be swungabout its pivot until arrested by engagement of the closed end of the slot 124 with the stop pin 126. This results in the completion of the escapement movement and the consequent advance of the traveling carriage one space in letter feed direction, the entire letter feed or substantially the entire letter feed taking place during theupstroke of the printing key. In other words, during the operation of the printing keys as described the dog rocker and the two dogs 86 and 111-112 mounted thereon will 00- operate with the escapement wheel to provide. an ordinary or no drop escapement for the carriage, that is, an escapement which affords step by step letter feeding movements of the carriage during the return movement or upstroke of the print- 1ng keys.

As aimeans looking tothe prevention of spreads provision. is made for operating the anchor escapement comprising the anchor member 108 and the dog members 111, 122 from the space key or bar of the machine independently of the dog rocker; that is, while the dog rocker remains motionless and serves merely as a support for the pivot of the anchor. The space key in the present instance is in the form of a bar 157, which, as will be understood from Fig. 1, extends from side to side of the machine forward of the latter keys and provides a cross connection for two space bar levers 158, the bar 157 connecting the front ends of said levers, which at their rear ends are fixedly secured to a rock shaft 159 bearing in brackets 25 fixed to and extending downward from the sub-frame 25. The pair of parallel levers 158 (only the left hand one of the pair being shown) and the cross bar 157 constitute with the rock shaft a spacing frame. Arranged about midway of the length of said rock shaft and extending rearward therefrom is a curved arm 160. The forward end of said arm is bifurcated or split to surround the rockshaft and the arms 161 constituting the bifurcated portions are drawn toward each other by a screw 162, the screw clamping the arm or bar 160 fixedly to the rock shaft and causing it to receive rotary movements from said rock shaft when the space key or bar 157 is actuated. The thickened middle portion 159 of the shaft 159, which is preferably constituted by a sleeve brazed to the shaft,

is engaged by the clamping jaws 161, which jaws at their roots are formed with rounded portions to match or embrace the sleeve. In short the opening between the jaw members is substantially in shape a'key-slot. The dis tance between the parallel forward portions of said jaws is'slightly greater than the diamet'er of the lesser part of the shaft 159, so that on withdrawing the screw 162 the arm 160 may readily be detached by movingflit sidewise off the sleeve 159 and then. pulling it rearward so as to withdraw the spaced jaws 161 over the shaft 159. Downward actuations of the space key are limited by a stop device 163 secured to the frame part 2. The rear portion of thearm 160 is curved or bent upward and forward and terminates in an enlargement or head 160. Said head is adapted to co-operate with the free end of the lower arm of a lever 164pivoted between its ends on a pivot 165 which is secured in the lower finger 94 of the plate 95, this finger or extension terminating in an angular forwardly bent portion from which the pivot I 165 projects rightward. The lever 164 which is of the first order is arranged at an inclination, the lower arm overlying the head 160 and the upper arm projecting rearward and upward so that it normally overlies the left-hand end portion of the arm 107 of the anchor member, the left hand portion of said arm being offset or curved forward somewhat so as to bring it under the upper end portion of the lever 164. The finger-98 overlies said lever 164 and acts as a stop to prevent undue upward When the space key 157 is actuated'or depressed it will swing down the arms 158, rock the shaft 159 and swing upward and forward the arm 160. The head 1.60 ofsaid arm pressing upward and forward against the lower arm of the levef 164 will swing it on its pivot so that the rear arm of said lever moving downward will act against the free end portion of the arm 107 of the anchor member 106. This results in stretching spring 133 and swinging the anchor member on its pivot movement thereof.

105 fromthe Fig- 2 to the Fig. 6 position. Referring particularly to these last mentioned figures and also to Figs. 3 and 8-it will be understood that thedescribed rotary movement of the anchor member 106 will carry or move the dogv member 111 bodily downward and the dog. member 122 bodily upward. At the same time the controlling member or stop lever 128 will be turned automatically on its pivot 129 by reason of its pin and slot connections with both of said dog members, thus resetting the lever.128 and maintaining its stop pins positioned for cooperation with the anchor dogs. The downward bodily movement of the dog member 111 will swing its tooth 112 clear of the wheel tooth 46 with which it had been engaged. But said dog member 111 will not turn on its pivot 110 under the pull of the spring 130 when thus freed, for the reason that it will be prevented by the face 114 contacting with the end of the stop arm 117, the parts being so proportioned that as the face 114 slides down over the-end of the stop there will be no pivotal turning or rotation of the dog member 11]. At the same time that the dog tooth 112 swings downward out of the wheel the dog tooth 123 will swing up into the path of the wheel teeth ent'ering'the second space to the left of the wheel tooth disengaged by dog 112 (Fig. 6) so that as soon as the, dog

tooth 112 frees the escapement wheelit will begin to turn. As it turns, the wheel tooth to the left of that just disengaged by dog 111 will engage with dog tooth 123 and will swing the dog 122 on its pivot against the pull of the spring 130, said dog swinging around its pivot 121 until arrested by the engagement of the closed end of the slot with stop pin 127. When this arrest takes place the escapement wheel and carriage will also be arrested, thus completing the escapement movement and resulting in a corresponding Step or letter space movement of the traveling carriage. This step of the car'- riage it will be understood will take place as a result of depressing the space key 157 and will have been completed when thespacekey reaches the end of its down stroke, at which time the" anchor escapement will be in the position illustrated in Fig. 6. If now the space key be released the parts will be re stored to normal position, the dog tooth 112 entering the escapement wheel so as to prevent any movement of the escapement wheel and of the carriage when the dog 122 has been swung downward far enough to disengage from the wheel. In other words on ther upstroke of the space key no movement of the escapement wheel will occur and consequently the carriage will not move to any appreciable extent. It will be observed then as a result of actuating the space key the dog members 111 and 122 will co-operate with the escapement wheel to provide an. anchor escapement which operates to cause a re verse or full drop feeding movement of the carriage; that is, the carriage will be .fed a full letter space distance on substantially a full letter space distance during the depression of the space key and .will not move dursaid rocker remaining motionless or quiescent during the operation of the anchor escapement by the space key; also that the stop and guide member or lever 128 and the stops 126 and 127 are automatically movable or settable in the same plane as the dogs 111 and 122. Suitable spring mechanism may be provided for restoring the space key mechanism and lever 164 to normalv position if found desirable.

From the foregoing it will be clear that the reverse or full drop escapement is caused by thedown stroke of the space bar and therefore a'full space on the paper will be obtained even if the space bar should not be immediately released. Shouldthe space bar be held depressed until after a letter key is struck the dog rocker will swing backward due to the impulse received from the universal bar frame and the actuated type bar, and as a result ,an ordinary" or no drop escapement action will take place when return swing of the rocker to normal,-

position gccurs, this no drop escapement being due to the co-operation of the dog member 122 and the bevel or holding dog 86 with the escapement wheel. "During such escapement action the dog member 122 will act as a stepping dog, taking the place of the regular stepping dog member 111, which latter will be held down at this time out of the path of the escapement wheel due to the contmued depression of the space key..

In other words, so faras the effect. on the carriage is concerned, the action is the same as if the-space bar had been released and normal operation resumed, the dog member 122 functioningras a stepping dog just as does the dog member 111 when the latter is in use. In fact the space bar may be held in depressed or operated position until the next following word is completely written without affecting the printing or writing of such word, it being onl ingblineis required to be made.

p necessary to release the] space bar before t e next space in the writa printing key has been depressed or actuated it be held'in depressed position, thus maintaining the dog rocker swung back to its abnormal position with the holding dog 86 in engagement with the operating tooth of the escapement wheel. If now the space key be actuated while the printing key is still held down the full downward stroke of the space key will take place without it being interfered with or blocked as in prior constructions, this being due primarily to the fact that the stop member 115 is a yielding or springstop so that it will yield or be swung downward by the under portion of the face 114 of the dog member 111. This face 114 is brought to overlie the end of the stop arm 117 whenever the dog rocker is swung downward to abnormal position as will be understood from Fig. 4, the stop face 114 being held in this overlying position by reason of the engagement of the stop lug 113 with the end of the stop arm 117. Consequently with the dog rocker swung back in abnormal position the depression of the space key and consequent operation of the anchor escapement will cause the un der side of the stop face 114, acting against the top of the stop arm 117, to force the stop member 117 downward, swinging the stop member 115 on its pivot 116 against the pull of the spring 118. As a result of the actuation of the space key at this time the parts will be brought to the position illustrated ifi F'rgsf7' and 9.' It will be understoodthat no stepping movement of the carriage will take place as the space key is depressed, byreason of the fact that the escapement wheelie held against movement by the holding dog 86. However this will be compensated for when both the depressed printing key and the space bar are released as the escapement wheel will advance one tooth to take up the stepping dog 111 and a second tooth to take up the third dog 122 and consequently the carriage will advance two letter space distances. In other words, with the completion of a word in rapid operation should it happen that the operator strike the space key before having released the key for the final character two spaces one for the final character printed and one for the space which is to follow this character will be obtained. l

By my present invention I preserve the advantages of prior construction designed to prevent spreads and faulty operation of the escapement mechanism, while at the same time defects and imperfections found to result from the use of some prior constructions have been cured and prevented.

Various changes may be made without dearting from my invention.

What I claim as new and .desire to secure by Letters Patent, is

1. In an escapement mechanism for a type- 2. In an escapement mechanism for a typewr1t1ng machine, the combinatlon of an escapement rack, a dog rocker, anchor es-' capement devices and an escapement dog independent of said devices, the anchor escapement devices being mounted on the dog rocker and comprising two dogs co-operating with said rack independently of said first recited dog.

3. In an escapement mechanism for av typewriting machine, the combination of a dog rocker, an anchor escapement, and a plurality of keys, certain of said keys actuating said dog rocker and certain of said keys actuating said anchor escapement independently of said dog rocker.

4. In an escapement mechanism for a typewriting machine, the combination of a dog rocker, an anchor escapement, printing keys, and a space key, the space key only operating the anchor escapement.

5. In an escapement mechanism for a typewriting machine, the combination of a dog rocker, and anchor escapement devices, the anchor escapement devices being vibratable in a plane transversely of the path in which the dog rocker rocks.

6. In an escapement mechanism for the carriage of a typewriting machine, the combination of an escapement wheel, a dog rocker, type bars, printing keys effective on said dog rocker to cause letter feed movements of the carriage, a space key, and anchor escapement devices operative by said space key to cause step-by-step movements of the carriage independently of said type bars. r

7. In an escapement mechanism for a typewriting machine, the combination of a rack member, a dog rocker vibratable transversely of the plane of said rack member,

and anchor escapement devices vibratable in the plane of said rack member.

8. In an escapement mechanism for a typewriting machine, the combination of ,a rack member, and a plurality of escapement dogs, certain of said dogs being vibratable -under key strokes transversely of said rack of said dogs being vibratable under key strokes 1n the plane of said rack member to.

cause a feed of the carriage at a different time relative to key strokes from that at which it feeds during transverse vibrations of said dog carrier. 1

10. In an escapement mechanism'ior a typewriting'machine, the combination of a rack member, a. pivoted dogcarrier vibratable transversely of the plane of said rack member, and a plurality of dogs mounted on said dog carrier, certain of said dogs being vibratable in the plane of said rack member independently of movement of said dog carrier. 4 w

11. In an escapement mechanism for a typewriting machine, the combination of a rack member, a pivoted dog carrier vibratable transversely of the plane of said rack member, and a-plurality' of dogs mounted on said dog carrier, all of said dogs moving with said dog carrier when it is rocked transversely of the plane of said rack member and certain only of said dogs being vibratable in the plane of said rack member independently of movementof said dog carrier.

12. In a carriage feeding mechanism for typewriting machines, the combination of a rack member, a plurality of dogs, and means for causing certain of said dogs to vibrate transversely of said rack member and co-' operate therewith to provide an ordinary or no drop escapement for the carriage and for causing certain of said dogs to co-operate with said rack member to provide an anchor escapement for the carriage.

13. In a carriage feeding mechanism for" typewriting machines, the combination ofa rack member, a plurality of dogs, and means for causing certain of said dogs toVibrate transversely of said rack member and cooperate'therewith-to provide anordmary or no-drop escapement for the carnage and for causing certain "of said dogs to co-operatewith said rack member'to provide an anchor escapement for the carriage, certain of the dogs being common. to both styles of escapement. c

14. In a carriage feeding mechanism for typewriting-machines, the combination of a rack member, a plurality of dogs including a holding dog, and-means vfor causing certain of said dogs to vibrate transversely of said rack member and co-operate therewith to provide an ordinary or no-drop escapement for the carriage and for causing certain of said dogs to co-operate with said rack membeer to provide an anchor escapement for the carriage, the anchor escapement being operative both when the holding dog is disengaged from and is engaged with said rack member.

' 15. In a typewriting machine, the combination of a -carriage, an escapement wheel connected thereto, a key actuated dog rocker, a dog. rigidly mounted thereon, and'a pair of dogs movably mounted on said dog rocker, the pair of dogs being operative independently of movement of said dog rocker to effect a movement of the carriage.

16. In a typewriting machine, the combination. of a carriage. an escapement Wheel connected thereto, a key actuated dog rocker, a plurality of dogs mounted thereon, and a space key for actuating certain of said dogs independently of said dog rocker.

17. In a typewriting machine, the combination of a carriage, a platen thereon, type bars co-operative with said platen, an escapement wheel connected to said carriage, a key actuated dog rocker, a fixed dog thereon, anchor escapement devices comprising a pair of dogs mounted on said dog rocker, one of said pair of dogs co-operating with the fixed dog and with the escapement wheel to effect letter feed movements of thecarriage, and said pair of'dogs co-operating with the escapement wheel to effect step-by-step move ments of the carriage independently of's aid type bars.

18. In a typewriting machine, the combination of a carriage, an escapement rack connected thereto, -a key operated dog rocker, a dog on said rocker normally engaging with said escapement rack, a pair of dogs co- 1 operating wlth said rack to provlde an anchor escapement, the anchor escapement being operated both when said rigid dog is disengaged from and engaged w th said escapement rack.

19. In escapement mechanism for typev writing machines, the combination of a key operated dog carrier, dogs mounted thereon, dog stops, and means controlled by the dogs themselves for automatically positioning said stops to co-operate with said dogs.

20. In escapement mechanism for typewriting machines, the combination of a key controlled dog carrier, dogs thereon, a stop carrier, dog stops on said stop carrier, and

ber, dogs pivoted to said anchor member, .a i

stop carrier adjustable in the plane of said rack member, stops, one for each dog on said carrier, and means for automatically setting said stop carrier. 23. In a typewritmg machine,the combination ofa carriage, a rack member connected therewith, a key controlled anchor member vibratable in the plane of said rack member, dogs pivoted to said anchor member, a

24. In an escapement mechanism for type--- Writing machines, the combination of a rack member, dogs, a dog carrier movable to cause said dogs to co-operate with the said rack member, anchor escapement devices on said carrier, means 'for vibrating said devices independently of said carrier, and stop devices vibratable with said anchor escapement devices.

25. In an escapement mechanism for typewriting machines, the combination of a rack. last named dog when sald anchor lever is member, dogs, a dog carrier movable to cause said dogs to co-operate with the said rack member, anchor escapement devices on said carrier, means for vibrating said devices independently of said-carrier, and stop devices automatically settable to co-operate with certain'of said anchor escapement de-' vices.

26. In an escapement mechanism for a typewriting machine, the combination of a rack member, a plurality of escapement dogs, certain of said dogs being vibratable transversely of said rack member and certain of said dogs being vibratable in the plane of said rack member, and stop devices for said lastmentioned dogs vibratable therewith. v

27. In an escapement mechanism for a typewriting machine, the combination of a toothed escapement wheel, a pivoted dog rocker vibratable transversely of the plane of said rack member, a plurality of dogs mounted on said rocker, certain of said dogs being vibratable in the plane of said wheel, and dog stop devices automatically vibratable in the plane of said wheel.

28. In a typewriting machine,

connected thereto, akey actuated dog rocker, a dog rigidly mounted thereon, a pair of dogs mounted to move on said dog rocker independently of its rocking movements, the pair of dogs being operative independently of movement of said dog rocker to efi'ect a movement of the carriage, and stop devices automatically movable with said pair of dogs so as always to be in. position to co-operate with said dogs.

29. In a typewriting machine, the combination of a carriage, an escapement wheel connected thereto, a key actuated dog rocker, a plurality of dogs mounted thereon, a space key for actuating, certain of said dogs independently of movement of said dog rocker, and stop devices for certain of said dogsau tomatically settable when said space 'key is actuated.

the combination of a carriage, an escapement wheel.

In a typewriting machine, the combination of a carriage, a rack member connected therewith, a key controlled anchor member vibratable in the plane of said rackmember, dogs pivoted to said anchor member, a pivoted stop carrying-lever, and stops projecting from opposite arms of said lever, said dog's being slotted to co-operate;

with said stops.

31. In a typewriting machine, the combination of a carriage, a rack member connected therewith, a, key controlled anchor lever, dogs pivoted to opposite endsv of said anchor lever, a stop lever, stops projecting from opposite arms of said stop lever, and engaging deviceson one of said dogs co-opcrating with one of said stops, the stop lever being automatically movable through the nected therewith, a key' controlled dog' rocker vibratable transversely of said rack member, a dog rigid on said rocker, a key controlled anchor lever ivoted to said rocker and vibratable in t e plane of said rack member, dogs pivoted to opposite arms of said anchor lever, and dog stops on'said dog rocker co-operative with said pivoted dogs.

so! 34. In a typewriting machine, the com bination of a carriage, a rack member connected therewith, a key controlled dog rocker vibratable transversely of said rack member, a dogrigid on said rocker, a key controlled anchor lever pivoted to said rocker and vibratable in the plane of said rack member, dogs pivoted to opposite arms of said anchor lever, and stop devices on said dog rocker co-operative with said pivoted dogs, said stop devices comprising a stop lever which is positioned when said anchor lever is operated.

35. In a typewriting machine, the combination of a carriage, an escapement wheel connected therewith, a key controlled dog rocker, a holdingdog on said rocker, a key controlled anchor lever pivoted to said rocker and vibratable thereon, dogs pivoted to opposite arms of said anchor lever, a stop lever pivoted on said rocker, and stops'on said stop lever having pin and slot connections with said pivoted dogs' 36. In a typewriting machine, the combination of a carriage, a rackmember conver pivoted to to actuatethe said anchor and said three-arm lever,

nected therewith, printing keys, a dog rocker controlled by said printing keys, a dog rigid on said rocker, a space key, an anchor lesaid' rocker, connections between said anchor lever and said space key, and dogs pivoted to opposite arms of said anchor lever and co-operative with said rack member when said'space .key is actuated.

37. In a typewriting machine, the combination of a carriage, a rack member connected therewith, printing keys, a dog rocker controlled by said printing keys, a dog rigid on said rocker, a space key, an anchor lever pivoted to said rocker, connections between said anchor lever and said space key,

ver, a stop lever pivoted on said dog rocker, and stops on said stop lever co-operatlve with said pivoted dogs, said stop lever being positioned when said space key is operated. I I

. 38. In a typewriting machine, the combination of a carriage, an escapement wheel connected thereto, a dog rocker, an anchor escapement mounted on said dog rocker, a key operated universal bar effective to rock said dog rocker, a space key, a rock shaft to which said space key is connected, an arm fixed to said rock shaft, and a lever having a stationary pivot and operative by said arm escapement.

39. In a typewriting machine, the combination of a carriage, an escapement wheel connected thereto, a dog rocker, an anchor escapement mounted on said dog rocker-v comprising a three-arm lever and two dogs pivotally connected to said lever, a spring connected to one arm of said lever and normally maintaining one of said dogs in the path of said escapement wheel, printing keys effective to actuate said dog rocker, a space key, and connections between said space key said connections comprising a lever engageable with one. of the arms of said three-arm lever to swin the latter on its pivot and overcome sai spring.

40. In a typewriting machine, the combination of a traveling carriage, an escapement wheel connected thereto, a key actuated dog. rocker, escapement dogs thereon, and stop devices carried by said rocker. and cooperative'with said escapement wheel independently of said do to prevent undue swinging movements 0 said. rocker in opposite directions.

dogs {fated anchor lever, two

pivoted to opposite arms of said anchor le- 4 1. In a' typewriting machine, the combi- I nation of a traveling carriage, an escapeprevent undue swinging movements of said rocker in opposite directions, said stop devices comprising an arm secured to one side of said rocker and a cross plate secured to the other side of said rocker. 42. In a' typewriting machine, the combination of a travelin carriage, an escapement wheel connected thereto, a key opervertically arranged dogs pivoted on said lever and co-operatlve with said escapement wheel, stops for limiting the movements of said dogs, and a coiled spring connected to one dog above its pivot and to the other dog below its pivot so that said spring tends constantly to swing-the engagi g ends of both dogs in the samedirection. 43." In atypewriting machine, the combination of a traveling carriage, a rack member connected therewith, a key actuated dog rocker,'a'nchor escapement devices mounted on sai'd dog rocker and operative independently thereof, said devices including a dog which is also effective when said rocker is actuated a yielding stop for said dog, and means for automatically controlling said stop. 44:, In a typewriting machine, the combination of a traveling carriage, a rack member connected therewith, a key actuated dog rocker, a space key, anchor escapement "devices erative independently thereof by said space" key, said. devices including a dog whichis also effective when said rocker is actuated, a yielding stop for said dog, and a' springmounted stop co-operative with the tail of said dog, sald spring mounted :stop being -movable automatically during actuations of the space said dog. a

Si ed at the borough of Manhattan -'city of ew York, in the county of New orkand State of New vYork, this 1 8th-day of October, A. D. 1920.

EDWIN E. BARNEY. Witnesses; 4 CHARLES-E. SMITH,

E; M. WELLS.

key in certain of the positions of mounted on said dog rocker and op-

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