US1447638A - Typewriting machine - Google Patents

Description

Mar. 6, 1923.

L H. BARR. TYPEWRITING MACHINE.l

2 SHEETS-SHEET I.

FILED NOV. l2, 1920.

HIS TTRNEY WITNESEEE f QQM Mar. 6, 1923.

YI. H. BARR.

YPEWRITING MACHINE.

2 SHEETS-SHEET 2.

FILED NOV. l2. 1920.

INVENTR /m www-5555 .f

JOHN H. BARR, OF NEW YORK, N. Y., ASSIGNOR TO REMINGTON TYPEWRITEROOM- PANY, 0F ILION, YORK, A CORPORATION NEW YORK. l l

TYrEWaITING MACHINE Application led November 12, 1920. Serial No. 423,629.

To all whom-t 'may concern:

Be it known'that I, JOHN H. BARR,citizen of the United States, and resident of the borough of Manhattan, city of Newv York,

5 in the county of New York and AState of New York, have invented certain new and useful Improvements in Typewriting Machines, of which the following isaspecification.

My present invention relates to carriage feeding devices, to mechanism for connect-l ing the traveling carriage of a typewriting machine with the carriage feeding devices and for disconnecting the connecting mechanism atwill .so that the carriage may be caused to travel independently of its feeding devices; and the main object of the invention is to provide new and improved mechanism and devices of the character specified.

To the above and other ends which will hereinafter appear, my present invention consists in the features of construction, combinations of devices and arrangementsv of parts hereinafter described and particularly pointed out inthe claims.

In the accompanying drawings Figure 1 is a fragmentary side elevation partly in section of the upper rear part of a typewriting machine embodying my invention.

Figure 2 is a fragmentary horizontal sectional -view taken on a plane indicated by the dotted line w-w in Fig. 1 and looking in the direction of the arrow at said line.

Figure 3 is a fragmentary vertical sectional view taken on a plane indicated by the dotted line -m in Fig. 1 and looking forward. l l

Figure 4 is a vertical sectional view taken on a plane indicated by the dotted i line y-y in Fig. 2 and looking in the direction of the arrow at said line, said Fig. 4 being drawn to an enlarged scale.

Figure 5 is a vertical sectional view taken on a plane indicated by the dotted line z-z in Fig. 4 and looking in the direction of the arrow at said line.

Figure 6 is a fragmentary sectional view corresponding to Fig. 4 but showing some of the parts in different relationshipsv and omitting other parts. l

Figure 7 -is a perspective view of a novel pawl device.

Figure 8 is a perspective view of a modication. 'fzbar 17 has rearward extensions 19 In Fig. 1, which. illustrates a typewriting machine of the general character more fulllgI disclosed in the joint application of 1J Barr and E. E. Barney, Sr.

led Aug. 16, 1920, and the application vof f E. E. Barney, Sr. #419,745 filed Oct. 26, 1920, the main frame of the machine comprises side plates'or frames 1 and arranged for reciprocation above said main frame isA a traveling carriage comprising an inclined plate or bar 2 to the end's of which are se.f cured forwardly 'extending end plates 3, grooved seats or runways 4 being formed at the top and bottom of the plate 2. .As appears from Fig. 3 the body of the bar 2 is provided with cut-outs as indicated at 5 so that in effect the carriage bar 2 is composed of upper and'lower parallel grooved parts 4 which are joined or connected by a series of cross portions or webs. The runways or grooved bars 4 receive sets of anti-friction rollers 6, the upper setv co-operating with a grooved seat formed in a stationary guide bar 7 which extends crosswise of the machine and is secured by screws 8 to the upper end portion of an angular bed plate or supporting member 9 fixed to the frame plates 1. The bed plate 9 has a forwardly extending horizontal portion which terminates in an upward extension 10 formed withja grooved guideway for the lower antifriction rollers 6. Journaled on the traveling carriage 2, 8 is a roller platen 11 with whose front face (zo-operate type bars'or printing instrumentalities 12 which are arranged in an arc of a circle below the platen being pivoted on a pivot wire 13 that is mounted on a vertica type bar support or segment 14. Each type bar is provided forward of its pivot with a contact face 15` for co-operation with the carriage feeding or escapement devices and has below its pivot an inclined or cam slot 16 through which it is connected with type bar actuating devices, vnot shown. Said carriage feeding devices are operated from aumiversal bar mechanism which comprises an arcuate universal bar 17, said universal bar being normally seated in a groove or depression 18 formed in the rear of the type bar segment 14, the contact faces 15 of the type bars being adapted to engage with the front edge of said universal bar and actuate the universal bar mechanism during printing operations. Near its ends the universal which are pivotally connected at 2O with crank /frame to transmit movement from the uniarms 21 fixed to a rock shaft 22 from which said crank arms pro-ject upward. Centrally said rock shaft has a rearwardly extending crank arm 23. The lower middle portion of t-he universal bar 17 is provided with a rearwardly extending arm 24 carrying a contact device or upturned rear end portion 25. y The arm 24 carries a downwardly extending slotted lug 26 which co-operates with a pin 27 projecting laterally from the upper free end 0f a crank arm 28 fixed to a. pivotal axis 29 which'also carries a rearwardly extending crank arm 30. The crank arms 30 and 23 are connected by a link 31 which assists to synchronize the movements of the universal bar frame comprising the universal bar proper 17 and its rearward extension 24. Said frame is supported from the axes 22 and 29 which are so mounted that vthey participate in any case shifting movements to which the type bar system may be subjected. The universal bar frame and its mounting have been but b-rieiiy described as they are not claimed in the present application.

The carriage feeding or escapemnt devices actuated from the universal bar include, as appears from Figs. 1, 4 and 5, a dog carrier or rocker, designated as a 'whole by the numeral 32, and comprising an uprightl plate-like portion 33 and a cylindrical cross portion 34, the latter formed at its ends with conical seats which receive the coned ends of bearing pins or devices 35 mounted on stationary parallel bearing arms 36 projecting downward from the bed plate 9. The dog rocker carriestwo escapement dogs or detents 37 and 38. the dog 37 being preferably in the form of a lug or projection rising from the top of the plate-like portion 33 and beveled at its working face. The dog 38 is a feed orvstepping dog and is angular in form comprising a long vertically disposed arm 39 terminating at its free end in a dog tooth 40 and rising from a hub portion 41 from which latter projects horizontally a tail piece 42. Said hub portion bears on a headed pivot pin 43 which /is secured in a boss 33a projecting forward from I`the plate 33, the pivot pin being adjustably held in place by a set screw 44 threaded into the side of said boss. A stepping dog spring 45 is hooked at its lower end through a hole inthe tail piece 42 and at its upper end is anchored to the plate 33. The dog arm 39 is adapted to vibrate back and forth between two stop lugs or studs 46 and 47 projecting from the rear face of the plate 33, the inner sides of said stop lugs being fiattened to provide suitable stop faces. A screw 48 is threaded through the stop lug 46 from the rear and projects forward beyond the front face of the plate 33, its point .being adapted to co-operate with the` contact device 25 on the universal bar versal bar to the dog mechanism. The upper end of the dog spring 45 is anchored to the rear portion of the screw 48, said spring constantly tending to throw the dog arm 39 against the stop 46. The dog rocker is provided with aspring 49, the lower end of s aid spring being hooked over a pin 50 projecting rearward from the rocker elow its pivotal axis and the upper end of said spring being anchored to a pin 51 projecting rearward from' a bracket or stationary arm 52 that is secured by screws 53 to the front face of the left-hand arm 36 and projects -inward or towards the right therefrom. Said arm 52 besides supporting the pin 51 also serves as a stopl for the dog rocker, said rocker being provided with a screw sto-p 54 which i's threaded forward through the lug 46, the point of said screw projecting beyond the front face of the plate -33 and being normally maintained in contact with the stationary arm 52 by the dog rocker spring 49. The contact or screw 48 is so adjusted that at. this time it is slightly separated from the contact -25 of the universal bar frame as shown in Fig. 1. Said universal bar frame is normally maintained in the Fig. 1 position by a spring 55, the rear end of which is connected to a post 56 on the arm 24, the J front end of said spring being anchored to a nut or device 57mo-unted on a screw 58 fixed to a member or bracket 59'rigid with the segment 14. The spring 55 normally maintains the front edge of the universal bar 17 inv contact with the inner wall of the seat 18. j

My present invention is particularly concerned with an improved connecting mechanism for connecting the platen carriage with the escapement devices of the machine, which mechanism. will next be described. Suitably supported on the traveling carriage 2, 3 is a feed rack, toothed bar or engaging device 60 which constantly meshes with a feed pinion or toothed connecting device 61 that is mounted on a horizontal shaft 62, as clearly appears from Figs. 1, 2 and 4. It will be noted .that the connecting device 61 is a spur pinion having radial teeth which are symmetrical, that is to say, the tooth faces at opposite sides of a radial plane bi-secting the top of each tooth are symmetrical. The end portions of said shaft are reduced or coned as indicated at 63 to yco-operate with sets of anti-friction balls 64, the set of balls at the rear being seated in a ball-cup or bearing 65, the outer face of which is threaded so that the ballcu ma be screwed into alug 66 rojectin P Y P g justed position. A ball retainer in the form of a split ring 69 is received ina groove in the depressed or seat portion of the member 65. A similar ball-cup or bearing member 7 0 is threaded into a lug 71 extending down-4 ward from the front edge portion' of the bed plate 9 and seats or contains the fronti set of balls 64 which are retained in place by a split ring 'retainer 72. A check nut 73 holds the front ball-cup `70 in adjustedl position. The shaft 62 is provided with a fiange 62a' and a circular bearing surface 62b which is forward of said flange. The

' pinion 61 is mounted loosely on the shaft 62 forward ofthe bearing portion 62b which is ofslightly greater diameter than the shaft portion on which said pinion bears. The pinion is loosely confined between the bearing portion 62b and a retainer 74 which may be of wire bent circularly and seated in a groove 5 in the shaft 62. A circular v escapement rack toothed member or wheel rigid relationship with its shaft 62. The. lescapement wheel or rack member 76 and the flange 62a are yaccommodated in an opening 9b in the horizontal portion of the bed plate 9.l In order to connect the loose feed pinion 61 with the escapement wheel 76 which is contiguousto] it at its rea'r side novel devices are provided comprising a curved or goose-neck pawl or toothed device 79 (shown detached in Fig.A 7 which is preferably made of spring steel and is perforated at one end to provide a bearing.

opening 8O andat the'opposite end terminates in a tooth 81 which is :adapted to cooperate withvthe teethof the pinion 61 behind the rack or engaging device 60. `It' will be noted that the`teeth of the pinion or rotary connecting device 61 are uniform in character from one face of the pinion to the other and that therefore the parts of the pinion teeth engaged by the devices and 79 arealike'. At itsl toothed end the pawl 'member 79 is perforated to receive va rearwardly extending pin 82' which is suitably fixed to the pawl and vwhich has a conical end 83.. The pawl member 79 bears on'a headed pin orv rivet 84 which is secured to the escapement wheel 76 near its perimeter and projects from the front face thereof, the

l bearing opening 8() in the Vpawl member en- `gaging with said pin 84 and the pawlmern- .be'r beingloosely confined between the head of said pin and the face of the escapement` iwheel. `The pointed pin 82 projects rearward through an elongated slot 85 cut in the escapement wheel. The pawl tooth 81 is constantly pressed toward the pinion 61 and is normally maintained engaged with said pinion by a semi-circular or bow spring 86 preferably made of music wire, one end of said spring being secured to a headed pin 87 projecting from the 4escapement wheel and the opposite end of said spring being suitably secured to the p-awl member 79.

j The construction is such that to and fro movements of the traveling carriage are transmitted directly from the carriage through its engaging'device or rack 60 to the feed pinion 61, while under normal conditions leftward turning movements of the feed pinion are transmitted directly through the pawl member 79 to the escapement wheel 76 and its shaft 62.` As stated, return or backward movements of the carriage are also participated in by the pinion 61, but the construction and relationship of the pawl member 79 to the pinion are such that ,they automatically break the connection between said pinion and the escapement wheel, the pawl tooth 81 vibrating in and out of the teeth of the pinion as said pinion rotates-backward so that its rotary movements will not be communicated to the es- `/capement wheel and its shaft. In other words, the pawl and pinion provide a direct one-way connection between the escapement wheel and the carriage, one which operates when the vcarriage movesr leftward but not when it moves rightward. Both said wheel and said shaft will remain stationary during such return movements of the carriage, the escapement wheel being held by the usual detent pawl (notshown) which normally engages with one of the wheel teeth 77. As the pawl tooth clicks in and out of or bobs .over the teeth of the feed pinion the pawl member 79 will turn or rotateV slightly on its pivot pin 84, the spring 86' alternately yielding to permit the tooth 82 to be forced out of the space between the pinion teeth and acting to force the tooth back into such an engagement.v rlihe power of the carriage motor or spring drum (not shown), which is as usual connected to the carriage and tends constantly to impel it leftward, is transmitted'through the feed rack and the described train of connections to the escapementwheel or circular rack so that theengaged tooth thereof acting against the stepping or feed dog 40 will normally overcome the'dog spring v45 and maintain the arm 39 engaged with'the stop 47 as shown in Fig. 5. When one of the type bars 12 is actuated to print, it's'contact face 15 acting against the universal bar 17 will move the universal bar vframe rearward against the spring 55, causing the contact device 25 to act against 'the screw or, contact` device 48 to swing the dog rocker rearward on its pivotal p axis,

carrying'the s tepping dog .40 out of engagement with the escapement wheel and the holding dog 37 'into engagement therewith.

As soon as the stepping dog 40 is' disen- 'gaged, the'dog -member 38 will be swungl on its. pivot 43, until the arm 39 contacts with the stop- 46, so that When the dog rocker returns to'normal the stepping dog V40 will pass behind the wheel tooth 77 from which it had previously disengaged and will l move into the-path of the next advancing Iwheel tooth 77 which will pick up the stepping dog and swing it back until the dog arm 39 reengages with the stop 47 which will arrest the escapement Wheel and connected parts including the carriage, 4resulting in a letter space advance movement of the latter -on the upstroke of the actuated printing key. When the escapement wheel is arrested as described, vby the engagement of the dog arm 39 with the stop 47, the pawl member 79 and its tooth 81 -will likewise be arrested and said'tooth being at the timeA Fig. 5 under the influence-of the spring` 'drum transmitted through the rack 60, and this tendency will be resisted by the pawl tooth 81 and the pawl member-79of which it is a part or byl which it is carried. Ow-

' ing to the special U-shape or goose-neck shape of this pawl member and the 'further fact that it is constructed of resilient or spring metal there will be a tendency to yield on the part of the pawl 79 to the pinion tooth, resulting in'cushioning the parts. In other-words, lthere is interposed in effect a spring or cushion in the train of connections between the carriage and the escapement wheel which becomes eective during escape'ment operations, and it has been found in practice that this results in materially lessening the noise due to the contact or striking together of escapement ele'- ,ments, that is in the present instance the Awheel teeth 77 and the stepping dog member.38.

1n order at will to rele-ase the carriage from its connection with and control by its escapement devices so that free -leftward movements of said carriage may be had when desired, releasing mechanism is provided which is illustrated in ligs. 1-4 and 6. Said mechanism comprises a spool or vsleeve 89 which is slidably mounted on the shaft 62 behind the escapement wheel and is rovided with two flanges 90 and 91. The y ont ange 90 is beveled as indicated at 92 for (zo-operation with the conical end 83 of the pin 82, and said flange is also countersunk as indicated at 93 to pass over the flange 62a when the releasing spool cam sleeve 89 is slid forward tol release the escapement wheel as presentlyl explained. The sliding movements of the sleeve 89 are controlled by a releasing lever 94 which ispivoted at 95 on the right-hand end plate 3 of the traveling carriage, the body of said lever being in the form of a long forwardly extending arm provided atts end with a key 96. The lever 94 further comprises a short arm 97 extending down below the pivot y95. A long arm of the lever 94 is lformedwith a guide slot 98 which co-operates with a headed screw 99 secured to the end plate 3. lThe lower end of the lever arm 97 terminates in a nose 97a which is adapted to e-ngage with a re-lease bar 100 arranged behind the carriage bar 2 and extending therealong. Near its ends said release bar is formed with slots, indicated at- 101, the narrow parts 102 of said bar above said slots, providing bearingA portions which are received in bends in straps or bearing members 103 secured to the rear upper parts of the carriage bar 2 near its -ends each by a headed screw 104 and a pin or dowel 105. A pair of -leaf springs 106 are arranged behind the carriage bar 2, one near each end thereof; being secured to the bar each by a headed screw 107 and at their free ends against the rear face o-f the release bar which they tend constantly to press forward into contact with the nose 97a. The upper edge portion of the release bar is adapted to bear or engage loosely in a groove or guide Y,

' bending `or twisting of the release bar, which' being of light stock and comparatively long is somewhat flexible and may tend to bend or yield during releasing operations but is prevented by the guide slot 108 which serves in effect as a stiening device for the release bar or member. rlhe release bar 100 is adapted to co-operate with an angular lever member 109 which comprises a vertical body portion H0-joining an upper arm 111 and a lower arm 112 bent angularly from said body portion, respectively at its top and bottom and extending in opposite directions therefrom. 'lh'e lever member 109 is pivoted on a stationary pivot, preferably a headed.

shoulder screw 113 which is threaded into the bed plate 9.y For the sake of clearness,

the part of the bed plate which receives-said screw is omitted from Fig. 1, but it will be understood that the shoulder of said screw abuts against the bed plate surface and that the lever member 109 is loosely confined betweenthe head-f the screw' 11e on which a bears'and the top of the bed plate.9. The

lever member 109 is so arranged that the free end of the arm 111 is contactive with the rear lower part of the releasebar 100 whilethe free end of the arm 112 terminates vin ahead 112el which lits loosely between the flanges 90. and 91 ofthe sleeve 89. The lever 1.09 is provided with a restoring spring 114 which 1s anchored'to a pin 115 .on the bed plate 9 and is hooked'at its opposite end in "a hole 116 in the lower arm 1.12, said resto-r- I ing springnormally maintaining said lower arm 112m contact with a stop pin 117 projecting up from the bed plate. 9, the stop limiting the rearward movement of the lower arm 112 and saidy stop together with the spring 114 determining the normal osition lof the lever member109 and there easing sleeve .89 controlled by said lever. The,

construction is such that when the lever 94 is operated -by dep-ressing'its key 96 it will resultI in swinging the releasing bar 100 rearward, its pivots 102 turning in the bearings.

103, and said -releasing bar 100 actin against the lever member 109 will swing sai lever member on its pivot, causing the head 112a toslide the spool or sleeve 89 forward on the shaft 62 from the position of Figs. 1 and 4 to the 'position illustrated in. Fig. 6. This forward movement will be transmitted through'the bevelj or cam surface 92 to the pin `82 on the pawl member 79, .resulting in overcomingthe spring 86 and swinging the moved uninterruptedlyA leftward. During Asuch movements of course, the' feed pinion 61' pawl member 7 9 on its pivot 84 so thatthe tooth 81 will be swung radially outward from the pinion 61 until it disengages from the teethi of said pinion.v As a consequence the escapement wheel 76 will be released or disconnected from-the carriage which will thus be freed' so that it may move or be.

lwillrotate freely on-the shaft 62 which will remain motionless. rlhe release bar 100 is of..

such length that this releasing of the escape- 4 ment wheel and freeing of the carriage may be e'ected at any point in the' carriage travel. When the key 96 is released or freed, the parts will be returned to'normal position by their restoring' springs, the pawl tooth 81 -being returned to engagement with the inion 61 by the by the spring 114,- and thejreleasing bar 100 and the lever 94, which if desired maybe f duplicated at theopposite end ofthe carriage, by the leaf springs 106. Briedy stated, the advantages of my present invention consist chiefly in simplifying,

and consequently cheapening, the construction and in rendering 1t moreV accurate. lt

- will be observed that the usual ratchet box and ratchet hitherto employed in most casesv to permit return movements of the carriage y spring 86, the! lever mem r 109 and the sleeve 89 being 4returned independently of the escapement wheel shaft have been dispensed with and that the feed pinion is employed to perform the additional function of a ratchet wheel for the purpose stated. Not only is the construction thereby simplified but it is rendered much more accurate by obviating the diiaculty heretofore encountered in cutting or adjusting the ratchet teeth so that they 'will be in exact register with the feed pinion teeth.- In spite of the exercise of great .care in manufacture and assembling it has heretofore been found practically impossible' to register or align the ratchet teeth and the pinion teeth without some variation or lost motion. It will be apparent that this feature of my invention may be employed with constructions other than that hereinbefore illustrated and described, and an example of the changes which may be effected in this connection is shown in Fig. 8 which illustrates a construction'ior style ofA pawl member differing somewhat from the goose-neck pawl member 79. Said pawl member 79 may be substituted by a lain pawl member 118 which as shown in ig, 8 extends straight from its Abearing opening 119 to its free end which is formed with. a tooth 120 for cooperation with the teeth of the feed pinion 61. Said pawl member at its free end also `carries a pointed pin 121 'for co-operation with the releasing sleeve A89 in the manner hereinbefore explained. v

Besidesthe changes above describedl other changes may be made without departing :from the scope of the present invention.l

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

1. lln a typewriting machine, the combination of a traveling carriage, a rack fixed to said carriage,fa pinion constantly mesh- .ing with said rack, escapementv devices, a-4

wheel; and connections between said carriage andsaid wheel comprising a resilient or sprin pawl, a toothed pinion, and a spring e ective on said spring pawl for normally maintaining itin engagement wlth said toothed pinion.v s v 4. ln a typewritin'g machine, the` comblnation of a traveling carriage, an escapement wheel, and connections between said carriage and said wheel comprising a resilient or spring pawl and a toothed device with which said pawl engages, the construction and arrangement being such that said resilient pawl yields and serves as a cushion when the escapement wheel is arrested.

5. In a typewriting machine, the combination of a carriage, a carriage feed rack, a feed pinion, escapement devices comprising an escapement wheel, and a goose-neck spring pawl mounted on said escapement wheel and co-operative'with said pinion.

6. In a typewriting machine, the combination of a traveling carriage, an escapement wheel, a pinion rotatable by said carriage, a spring pressed pawl mounted on said escapement wheel and having a tooth co-operative with said pinion, and key actuated releasing means comprising a cam effective to disengage said pawl from said pinion.

7 In a typewritng machine, the combination of a traveling carriage, an escapement wheel, a pinion rotatable by said carriage, a spring pressed pawl mounted on said escapement wheel and having a tooth co-operative with said pinion, and key actuated releasing means comprising a slidable cam y effective to move said pawl radially of said pin to inoperative position.

8. In a typewriting machine, the combination of a traveling carriage, an escapement Wheel, a pinion rotatable by said carriage, a spring pressed pawl mounted on sai'd escapement wheel and having a tooth co-operative with said pinion, key actuatedj releasing means comprising a slidable cam effective to move said pawl radially of said pinion to inoperative position, a lever connected to said cam, and a releasing bar for actuating said lever. A

9. In atypewriting machine,the 'combinavtion of a traveling carriage, an escapement wheel, a pinion rotatable by said carriage, a spring pressed pawl mounted on said escapement wheel and having a tooth co-operative with said pinion, key actuated releasing means comprising a slmable cam eHective to move said pawl radially .of said pinion to inoperative position, alever for operating said cam, said lever being mounted on the frame of the machine, a releasing bar mounted on the carriage, and a key lever mounted on the carriage and effective on said releasing bar.

10. In a typewriting machine, the combination of -a traveling carriage, an escapement wheel, a pinion rotatable by said carriage, a pawl mounted on said escapement wheel to co-operate with said pinion, said pawl being provided with a pin projecting through a slot in saidlescapement wheel, a circular cam for releasing said pawl, and means for actuating said cam comprising a release key on the carriage.

11. In a typewriting machine, the combiprovided with nation of a traveling carriage, an escapement wheel, a feed pinion, a pawl mounted on said escapement wheel to co-operate and means for releasing said connections, l

said means comprising a release .key on the carriage and a pivoted release bar having an edge portion loosely engaging in a groove in the part on which it is Pivoted.

13. In a typewritingmachine, the combination of a traveling carriage comprising a grooved bar; an escapement wheel; releasable connections bet'ween said escapement wheel and said carriage; and means for releasing said connections, said means comprising a release key on the carriage and a spring pressed release bar pivoted to and depending from said carriage bar, the vupper edge portion of said release bar engaging with the groove in said carriage bar.

14:. In a typewriting machine, the combination of a traveling carriage, a pinion rotatable by said carriage, a shaft on which said pinion is loosely mounted, an escapement wheel fixed to said shaft, a pawl pivoted to said wheel and co-operative with said pinion, said pawl being provided with a pin projecting through a slot in said wheel, a cam spool slidable on said shaft and eHective on said pin, and key operated releasing means for actuating said spool.

15. In a typewriting machine, the combination of a traveling carriage, a feed pinion, a shaft on which said pinion is loosely mounted, an escapement wheel iixed to said shaft, a pawl pivoted to said wheel and cooperative with said pinion, said pawl being a pin projecting through a slot in said wheel, a flanged spool having a cam and slidable on said shaft, a spring pressed lever having a stationary pivot and a head engaging loosely between the anges of said spool, a spring pressed release bar pivoted to said carriage, and a release key on said carriage.

16. In a typewriting machine, the combination of a traveling carriage, a supporting member, a carriage rack, a feed pinion, a horizontalI shaft on which said pinion is loosely mounted, sets of anti-friction balls co-operative with' the ends of said shaft, screw-cups adjustably secured on said carriage supporting member, an escapement wheel fixed tosaid shaft, releasable connections between said pinion and said escapement wheel, and a key actuated releasing cam slidably supported on said shaft.

17. Ina typewriting machine, the combination of a traveling'carriage, a supporting member, a carriage rack, a feed pinion, a horizontal shaft onlwhich said pinion is loosely mounted, sets of anti-friction balls co-operative with the ends of said shaft, screw-cups adjustably secured on said carriage supporting member, an escapement Wheel secured to a flanged portion of said shaft, and a key 'operated cam spool slidable on said shaft and effective to release said pawl.

18. In a typewriting machine, the combination of a key operated universal bar frame a carriage, an escapement wheel connected to said carriage, a dog rocker comprising a plate portion and a cylindrical bearing portion, an angular stepping dog pivoted to said plate portion, a holding dog fixed to said plate portion, a screw stop threaded through said plate portion, a fixed stop cooperative with said screw stop, a dog rocker spring normally maintaining said stops in engagement, a screw threaded through said plate and co-operative with said universal bar frame, and a spring connected to said stepping dog and anchored to said last named screw.

Signed at the borough of Manhattan, city of `New York, in the county of New York and State of New York, this 10th day of November, A. D. 1920.

J CHN H. BARR.

Witnesses:A

CHARLES E. SMITH, LmLrAN NELSON.

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