US1011786A - Type-writing machine. - Google Patents

Description

P. W. HILLARD. TYPE WRITING MACHINE. APPLICATION FILED Nov. 10, 19021 Patented Dec. 12, 1911.

2 SHEE'fSSHBET 1,

WITNESSES: I INVENTOR P. w. HILLARD; TYPE WRITING MAG HINE. APPLICATION FILED NOV.'10 ,1 902. L I I 1,01 1,786. Patented Dec. 12,1911

2 SHEETS-SHEET 2.

-W|TNESSES: INVENTQR 1896,'which has been and steady UNITED STATES PA ENT. onrion.

FRED'ERIC W'. HILLARD, OF NEW YORK, N. Y.

TYPE-WRITING MACHINE.

i Specification of Letters Patent. Patient-ed -Dee, 12; 1911 Original application filed August 25, 1896, Serial No. 803,845.

Divided and this application filed November 10, 1902. Serial No. 130,756.

To all whom it may concern:

Be it known that- I, FREDERIC W. HILLARD. a resident of Tottenville, in the county of Richmond and city andSt-ate of New York, have invented'certain new and useful Improvements in. Type-VVriting- Machines, of which the following is a specification.

My present application .is a. division of my application filed in the-United States Patent Ollice on the 25th day of August, serially numbered (303,845.

The invention described in this application relates to an improved escapemcntfor the spaced member of type\\"riti1'1g machines, and has for its object to provide such a construction thereof as willresult in a. quick feed of the spaced member. as well as to permitthe key levers to be worked with a. lightfinger pressure. The escapement herein described has man y advantages in common with the escapements described in my prior patents, viz: No. 554,874, dated February 18th, 1896: No. 577,992, dated March 2nd, 1897; and No. (316,840, dated December 27th, 1898, to which patents reference is hereby made for the disclosure of the general principles involved in the action of the present escapement.

I will, in the accompanying specification and claims. point out and claim the several features particular to this invention and which 1 desire to protectby Letters Patent of the United States.

Referring to the accompanying drawings. in which corresponding parts are designated by similar marks of reference: Figure l is a detail side elevation of a typewriting machine equipped with my improved escapement, some parts of the machine being/cut away in longitudinal section to more clearly show the escapement mechanism. Figs. 2- to 13 inclusive are detail and positional views of thecscapement. Figs. 2. 3 and 4 are positional views in single spacing, the rack being shown in dotted lines. Figs. 5, ti and T'show the positions of the parts in double spacing. with the rack shown in dotted lines. Figs. 8. 9 and 10 are. front elevations of the parts in the positions which they assume, 1st in their normal st'ate .-2nd

in their position for single spacing, and 3rd in their position for double spacing. Fig.

11 is a detail of the rear dog, and of the spring for'the rear dog, as seen from the rear of the detent. Figs. 12 and 13 are respectively front and side views of the front and rear dogs deta-c ied from the escapementrocker, showing the method of pivoting the frontrdog to the rear dog and the rear dog to the rocker. Fig. 14 is a detail View ofthe carriage main spring, main spring barrel and a modification of the escapement. Figs. 15, 16 and 17 are positional views of the escapement of Fig. 14;; Fig. 15 showing normal position, Fig. 16 that when a key is partially depressed and Fig. 17 that corresponding" to the full depression of a key.

' Fig. 1 shows a sectional view of the base frame 1. Extending in a perpendicular direction from the back portion of the base frame are the brackets 2 (only one of which I is shown) for the carriage guide rail 3 and the parts mounted on the guide rail. The principal parts which are mountedon the guide rail are the carriage 41., the rack 5 journa led on the rail 3 by the collars 2G. and the carriage shifting frame At the front of the machine is placed the key board. The type bars '7 are pivoted on a suitable plate (not shown) in front of the platen 8, and are. operativcly connected with the key levers 9 by means of the key lever connecting wires 10, bell, crank levers 11 and type bar connecting. wires 12. In their normal 35 positions of rest the type bars lie in a basket or butter 13 as is usual in typewriters, and upon depression of any key 14 the connected type bar is caused to swing rearwardly to bring its type 15 to the printing point at the platen-to effectthe printing.

The detcnt or cscapement rocker 16 is pivotally mounted in the. machine frame below and to the rearof the carriage, and is provided with rcarwardly extending arms atcither end, to which are rigidly secured the universal bar 17 which rests upon the rear ends of the key levers. The key levers are hung upon the fulcrum l8'at a point in front of the universal bar 17, so

since the type bars are positively connected to the key levers for positive movement therewith toward and from the platen, it

follows that they will be returned from their printing position at the platen to their normal positions. in the buffer by means of the key lever springs 21, or by any other means which exert force to lift the keys when they are depressed.

The carriage is normally held in check by the engagement of the rack 5 withthe front dog or tooth 19. A rack guide 22 .holds the rack in its normal position. The

rack guide may be held in its normalposition by any sultable means, as say a spring 'or gravity, and returned by such means to its normal position after it has been moved to disengage the rack from the dog 19. Onthe guide 22 is a strip '23 which'is bent around so that it passes under the rack and engages it on each side. On the left hand end'ofthe carriage is the carriage release key 24 which is pivoted to, a shaft on the opposite end of which the hook 25 is fastened. The hook 25 engages the rack guide 2 2. By pushing the release key 24 back ward the rack is swung forward, revolving the rack on its journals 26 and so disengaging the rack from dog 19'. The carriage can be .then moved to any desired position ma ually and upon the release of the key 24: the rack guide will return to, its normal plosiuon, thus 'rengaging the rack with the in the operation of my present escape.- ment-, -.1pon depression of a key 14, the dog 19' is .fii-st disengaged from the rack, and

.under thev impulse of the carriage propelling power (which may be the main spring contained in a spring barrel of the usual constructionand attached to the carriage by the usual connecting band,'a s.say carriage main spring-27, spring barrel 28 and connecting band 29 shown-in Fig. 14) the carriage starts forward, meaning thereby toward the left hand sideof the machine looking from the positionassumed by the operator in manipulating the keys, and continues its forward movement until the rack comes in contact with dog or tooth 20 which has been brought into line with the rack by the frontward swinging movement of the rocker 16. At this time the bevel faced wing- 30 of dog 20 engages with the,

roller 31,.pivoted'on the stationary pin 32;

the dog, bevel faced wing, roller and pin,

key is held downf If the key is still further depressed after the engagement of the rack with dog 20 and after the engagement of the wing 30 with the roller 31, the rack and carriage will thereby be cammed back- -ward, meaning thereby toward the right hand side of the machine, as is fully described inmy said Patent No. 554,874; and in my present escapement such camming back, as well as the extent thereof, depends, in connection with the extent of the depression of the keys, on the relative adjustment of the bevel faced wing 30 and its roller 31, as well as on the adjustment of the adjustable stop screw 45 which determines the rack holding position of the normally engaged dog-1f) on the rocker 16, but instantly, upon the release of the depressed key. as soon the disengagin movement 4 between the rack and dog begins, thecarriage at and rack 5 start to advance along their lines of feed, this being-due to the disengagement of the feeding bevel a of wing 30 from the roller. The rack and carriage continue to feed during all of the time that the bevel faced wmg is being disengaged be rocked too far frontward the main spring could. not disengage the dog from:

the rack, but so long as the wing 30 is in engagement with the roller to the rear of the pivotal point of the roller, the pull of 'the main spring tends to disengage the dog 20 from the rack and to retingage the dog 19 therewith, as is fully described in my Patent No. 580,281. Hence the normally engaging members in the escapement are disengaged by the stroke on the keys, andthey are re'e ngaged by the pullof thecarriage propelling power. which also lifts the depressed keys and 'disengages the-normally disengaged' dog from the rack.

The. type bars areconnected to the key levers for positive movement therewith away flOllT as well as toward the platen,

and hence are also retu'rned tonormal position, or at any rate started back toward normal position by the pull of the carriage propelling power,

. In order to insure that the dog 20 shall buffer 33 placed on frame 34, against which the front dog 19 is pushed when it has been rocked to the limitef its trontward movelnent, and which {prevents any accidental rocking of the detent too far frontward. From the-above it will be seen thatthe escapement parts-are started back towardnormal position,.- the key started upward and the type;bar-1-started away from the platen, all by -:aid;of the carriage propelling; power, as ,SOODfaS the depressed key is released. But the carriage propelling power may exertits pressure on the depressed key prior to its release, tending thereby to repulse or repel the finger of the operator as fully described in my said Patent No.

580,281; and such repulsion will be felt, or not, by the finger on the depressed key prior to the fullfdepression of the key, depending on the relative adjustment of roller 30 and bevel faced wing 31 and on the adjustment of stop screw 45 in the rocker 16. Hence I have provided adjustments for varying the period at which the carriage propelling power repels the depressed key and the operators finger thereon. 1

Mr. From the above it \\'lll be seen thatfsince -'the'beveled face a of wing 30 is engaged with the roller to the rear of .its pivotal point when a key is fully depressed, the rack and carriage will begin their feeding movement under the-influence of the main spring instantly the depressed key is released, and that at this time such feed is due to the beveled feeding-face a of wing 30 and to the roller 31. v

The rack engaging face cl of dog 19 is provided with a slight or anti-friction bevel extending across the entire width of the. rackengaging face of the dog, to permit of the keys being easily depressed; but this bevel is not intended to permit any material feed of the carriage nor does it cause the main spring to exert any force for disengaging the normally engaging dog 19 from the rack.

The normally engaging dog 19 is pivoted directly to the side of the normally disengaged dog '20, and the dog 20 is pivoted to the detent.- or rocker 16 by its shaft 46, having coned bearings 48. hen disengaged from the rack the dog 19 isvspaced backward by spring 35, which is fastened at one end to finger 36 on dog 19 and at the other end to dog 20 by the, finger 36 The rearward movement ofdog 19 about its pivot on dog 20 is limited by the abutment of the stop part or finger e of dog 19 against the shaft at} of dog 20. The s'pring'37 holds the dog; 20 forward on the rocker,--the spring and roller 31to'gether serving to properly position the dog for/entering between the rack teeth upon de1')ressi0n-ofany in danger of skipping through" [between tlg'e;

human:

with. P efl ngaszd a 20 assets, 9;??-

the dog X- mmathe p avhen he $398 is cammed backward by roller- 31 F 8 shows. in dotted'lines the relativepositions of the spring 37 and pin 37 b in the normal position of the dog 20 and Fig. ,9 their positions when dogQQhas been cammed; backsp ng eng gednthem h s a d-fi M, e p g da r byi ng rflew d am the pm. y u; sudden-ale .z'm ni' One of the-advantages -of..pivoting;. the normally engaging dog to the normally disengaged dog is, that the danger of skipping.

in-the print is thereby greatly reduced.

In my present escapement whena key is depressed the detent is thereby rocked bodily frontward while at;thesame timetheforce 0f the main pn ng et ng Qa h basal? eee i wing 30 and A3. Her .31 tends,,to prowdpthe, g ward yae lthe gas et-1 Th re}. fore .in case dog;19*a\-'er,e. pivoted directlyyito;

the rocker, asis. customaryyinstead,.of -to 1- dog 20 as I have-shown it, .thedista'nce ,between the adjacent, edges of the two dogswould be greater when dog QOengageS the rack than it would be when do& 19e'ngages.

the rack, and consequently t-l1e.. adjacent edges of the dogs wouldhave to'be'placed I two dogs when at key, ;sho ul d g be, depresse causing skips in the .printxfDur-mg a later. period, afterthe release ofthe depressed kev and while the detent is bein swun u D D rearwardly the dangenof skippingin the print would, under thesame c rcumstances,

be increased. But bypivoting dog19 di-' rectly to dog,-20.t-hese dangers and ,objec; tions are avoided as-dn this casediqtlpgdogs 511? dr araa dlyaieai bs; 9 g liQn gether by the 1 main spying and, il istaxrqe, between theiri arljaeentr;edges glrern ns the same when dog 20 enga gesthe rack asv .1t. when dog 19 is engaged. Y v I have provided means in my eseapement for double spacing-as wellas -for single spacing, and thesekvill now be described. Thereis nostep back of the dog. 1 9 to;

limit its spaciagavhen in linewith ;-t,lie, rael save the sha But a stop 38 pro 19 when that ldegi 1s ro'c of line of the rack by depression of a single spacing key 14; The stop38 is pivoted at its front end by the. pin '39 to'the'frame of the machine, andat its rear end? is; hooked to, the double spacing bail 40, by thelink 41. Theparhof this stop piece in line with dog 19 when that dog is engaged with therack '5 is cut; away so as not to interfere w th thebackward spacing of the dog to tr p it out of the rack when returning the carriage to the starting point for anew when the stop is in its normal or lower position. The face 43 permits of the dog spacing backward one tooth space on the rack, after which it is arrested, in single.

spacing, by the stop 38, in position for the dog to reengage with the rack in the-next toothback of the one from which it was disengaged. 'VVhen a double spacingkey 14 is depressed the stop 38 is lifted by the lifting of the double spacing bail, so that the stop is in line with and at the level of the cut away part'44 above'the shoulder 43 on the dog 19 when the dog is rocked frontward out of the rack. The dog can then space backward far enough to reengage with the rack two teeth back, where it is stopped bv the abutment. of the face 6 against the shaft of the dog 20 in position for double spacing. Partof the keys are arranged to lift double spacing ba1l 40 and hence are double spacing keys, their key levers ex- -tending to the rear underneath thebail 40; and the remainder. of the keys are adapted to rock the detent 16 and swing the type bars to the platen without lifting the bail 40,- since their key levers are so short as not to extend beneath ball 40,, and hence are single spacing keys. All'of the key levers, both single spacing and double spacing, extend underneath the universal bar or single spacing ball 17 and operate 1t.

The stop 381s provided with the beveled face 42 on the side next the dog 19 in or der,

for one reason, to prevent any liability of the dog butting on the edge of the stop. The bevel face 42 also acts, in single spacing, to cam the dog 19 f(ll \\'tll(l on the rocker when the frontward wringing of the rocker is continued by a further depression of a key after dog 19 has been swung out of .the rack and after the dog has been spaced backward by its spring 35 into contact with theface 42. 1f this dog is thus cammed forward it is obvious that the resistance of the spring 35 must be overcome by pressure applied on, the depressed key, and the spring t-hus'extended to-permit of the dog swinging forward on the rocker, the pressure on the key thus serving to store up energy in the spring, which stored energy may be utilized, upon the release of the key,

to aid in lifting the key and restoring its connected type bar to normal'position in the buffer 13 and in rocking the detent 16 rearwardly, thereby disengaging dog 20 from the rack and reengaging dog 19 therewith, by means new to be described.

- After the release of the depressed key the spring 35, pressing'the dog 19 forcibly against the beveled face 42, tends to rock the detent rearwardly, as the dog slides down the beveled face 42, thus tending to lift the depressed key and to disengage dog 20 from the rack and reengage dog 19 therewith. Hence it is apparent that, as soon as pressure on the key lever is released by the release of the depressed key, bevel face 42, acted-on by force of the spacing spring 35, cooperates with beveled face a, acted on by the carriage, main spring, in

thereby reiingaging the normally enging dog 19 with the rack and disengaging the normally disengaged dog therefrom, as well'as in lifting the depressed key and starting the returning the detent to normal position and type bar back toits normal position. During the return movement, upon the reengage aent of dog 19 with the rack, the dog is drawn forward with the rack by the carriage main spring to its forward limit on the rocker 16, where it is stopped by its contact with the adjustable stop screw 45,the main spring thus serving to impart tension or force to be stored up in spring 35; which force is transmitted. upon depression of a key, through dog 19, and-beveled face 42for rcstoring said parts to their normal positions after they have been operated. In my herein described escapcmentI dcpen'd wholly on the means above enumerated for restoring the dctent. 16 and its parts to normal-position, and have dispensed with the usual escapement returning sprmg, but WlSll to have it understood that such a returning spring may be also employed if desired.

The two dogs 19 and 20 are so placed on the detent 16 that in single spacing the car riage is fed part of the tooth space by the dog 20 and theremainder of the tooth space by the dog 19; and in double spacing the carriage is fed part of onetooth space by the dog 20 and one and a part tooth spaces by the dog 19. The two dogs' are staggered with respect to each other on the rocker. By

iineai'is ofthe adjustable stop screw 45 the portion of the feed to be performed under I control of either dog may be varied.

In single spacing I have provided the shoulder 43 which engages stationary stop I 38 to limit the rearward spacing of dog 19 for letter spacing, and for double spacing I --'-have provided the fingere on thedo which 'en'gages the shaft 46-of dog 20,.constituting a movable stop; but I wish it understood.

that I may use either thestationary stop 38 or the'movable stop 46at will. in single spacing, as for example with the modified escape- A dlfiiculty which I- have overcome by the "use of finger e and its abutment 46, is the' liability of the dog 19 to enter the rack a .ment of Figs. 14

to 17, designed for single spacin only.

tooth tothe rear of the one which it should "enter on reengaging the rack upon the re lease of a depressed key, resulting in skipping, via, a double-space feed of the car- "riage where there should be single spacing,

-or atreble feed where there should be double This difliculty is due to the fact that the rack "tion of the keys is exceedingly rapid in printing, so thatioften adepressed key is released and the feed of the rack begins and has progressed so far before the dog 1.9 reenters the rack that in case the backward spacing of thedog is determined by a stationary stop, as is usual, the dog will reenter the rack a tooth' one tooth too far back of the'one from whlch 1t hadescaped; and this is particularly true 111 double spacing, since it takes longer for dog 19 to space backward qdogg-20untilfinger e abuts onashaft 46, lnnlttw'o rack teeth than one. I therefore ar range the stop 46 to space forward and back witlrthe normally disengaged dog, thereby insuring that the normally engaged dog, when disengaged, shall space to a uniform distance backward in the line of feed, relatively to the normally disengaged dog, in all the'positions in that line that the normally disengaged dog occupies while, engaged with the.- rack.:

In the operation of the escapeinent, during vthe. depression of a double -spacingkey, as

soon as dog 19 has been disengaged from the rack, itispaces backward on. 1ts'p1v ot 47 on ing. the vbackward movement of-the dog 19 upondogQO, and proper, positioning the dog reenter the secondracktooth back of the onefrom which it hadbee'n disengaged. .Upon the further. depression; of the key, afterwing 30 has engaged rollerv 31, dog 20 will be cammed backward, together with the.

; rack 5 incase a legato blow is struck (as is fully described in my said Patent No. 554,874), by roller 31 and beveled wing 30, thus permitting dog. 19 to swing still farther backward, in unison with the rack and in I forward and maintaining it in the same rela-' tion with the rack until it reen'gages therewith. It will thus be seen that, upon the release of a depressed key, the carriage propelling power spaces the normally engagingdog-'19 forward in unison with the rack while said dog is disengaged and rior to its reengagement with the rack, as we I as serves to reengage said dog with the rack. In moving the carriage and rack backward manually to bring them to the starting point for a new line of print, the dog 19 trips backward and down out of the rack; first swinging backward and down on its pivot 47 on dog 20 until finger e abuts on the shaft 46, and thereafter, by means of its pivotal connection 47 and the abutment 46 and finger e, forcing dog 20 backward and down on its pivot 48 on the detent, until dog 19 has been swung down sufficiently to clear the rack.

In Figs. 14 to 17, Fig. 14 shows a detail of the carriage main spring 27, wound up in the spring barrel 28, the barrel being broken away on one side for the purpose of showing the spring. The dog 20 is provided with a roller 31", mounted on the dog, which engages with a fixed bevel faced plate 30. The plate '30 is adjustable on the frame of the machine. The dogs 19 and 20 are staggered with respect to each other in the adjustment shown, so thatpart of the tooth space is fed with one dog and part with the other dog. I The backward movement of dog 2O on the detent 16 is adjust ablytlimited by the adjustable stop screw 45*,and the forward movement of dog 19* on the detent is adj usta-bly limited by adjustable sto screw 45 which ma be so .ad-

j usted on the detent as to permit thedesired portion of the feed to be performed under control of each dog. The stop screw 45 shmiltl be so adjusted as to correspond to the various adjustments of cam plate 30".

In the construction of Figs. 14 to 17, the roller 31 and bevel faced plate'30 perform functions similar to the bevel .faced wing 30 and roller 31 of Figs. 1 to 13, but in the two constructions the positions of these my claims.

parts are reversed, serving to illustrate the a fact that broadly it is immaterial whether the roller be mounted on a fixed part of the machine and the bevel faced part co-acting The that the relative location of the parts may be varied, and the rack mounted onthe machine frame and the escapement rocker. on

the carriage; and that the carriage maybe either in the. form of a paper carriage or a type carnage. I mention these various structures not as indicating modifications of my invention, but to illustrate the scope of I use the term spaced memher and spacing member, as defining generally the two parts of the escapement, and the term rack as generic to straight and circular racks.

Having thus described my invention what I claim and desire to secure by patent is:

.gage the other member other of which normally engages .mally engaging 1. In a typewriter escapement, the combination, with a rack, of a spacing rocker and two dogs movable in the line of spacing one of which is dlrectly mounted on the spacing rocker and the other indirectly.

2. In a typewriter escapement, the'combination, with a rack, of a spacing rocker and two dogs movable in the line of spacing. one of which is mounted on the other and the other on the spacing rocker.

3. In a typewriter escapement, the combination of two engaging members, a spacing rocker in one member and two'dogs thereon movable in the line of spacing which alternately engage the other member, one of which dogs is directly mounted-on the spacing rocker and the other indirectly.

at. In a typewriter escapement, the combination of two engaging members, a spacing rocker in one member'and two dogs thereon movable in the line of spacing, one of which is normally disengaged butadapted to enand is directly and the the said other member and is mounted onsaid 'normally disengaged dog.

5. In a typewriter escapement. the combimounted on the spacing rocker,

nation, with a rack, of a spacing rocker, a,

normally disengaged dog movably mounted thereon in the dog movably mounted on said normally disengaged dog.

thereon in the line of spacing,

line of spacing and a nor 6. In a typewriter escapement, the combi-'- nation, with a rack, of a spacing rocker, a normally disengaged dog movably mounted a normally engaging dog movably mounted on said normally. disengaged dog and meansfor spacing the normally engaging dog backward .on the normally disengaged dog.

, 7 In a typewriter escapement, the combination, with a rack, of a spacing rocker, a

normally disengaged dog movably mounted thereon in the line of spacing, engaging dog movably normally disengaged dog, ing the normally engaging dog backward on the normally disengaged dog and an abutment or stop to limit said backward spacing.

8. In a typewriter escapement, the combination, with a rack, of a detent, a normally disengaged dog movably mounted thereon, a normally engaging dog movably mounted on said normally disengaged dog, a spring for spacing the normally engaging dog backmounted on sald a normally a spring for spac- I Y ward on the normally disengaged dog, an'

abutment or stop upon the normally (lisengaged dog to limit said backward spacing, said'stop being arranged and adapted for movement forward and backward in unison with the normally disengaged dog, whereby the backward spaced position of the normally engaging dog is maintained in uniform relation to said normally disengaged dog in all. positions of the normally disengaged dog while the normally engaging dog is disengagcdfrom the rack.

9. In a typewriter escapement, the combination, with a rack, of a detent, two movable dogs mounted thereon one of which normally engages the rackand the other of which is normally disengaged, means r'or disengaging said normally engaging dog, means for spacing it backward relatively to the normally disengaged dog and means-for spacing it backward with said normally disengaged dog.

10. In a-typewriter escapement, the com bination, with a rack, of a detent, two movable dogs mounted thereon one of which normally engages the rack and the other of which is normally disengaged, means for disengaging said normally engaging dog, a spring for spacing it backward relatively to said normally disengaged dog and means operated by a key for spacing both dogs backward together..

" 11. In a typewriter escapement, the combination, able dogs mounted thereon one of which normally engages the rack and the other of which is normally. disengaged, means for disengaging said normally engaging dog, a spring for spacing it backward relatively to said normally disengaged dog and a cam for-spacing both dogs backward together.

with a rack, of a detent, two movv 712. In a :typ'ewriter escapement, the combination, with 'a-rack, ,of a detent, two movable dogs mounted thereon one of which normally engagesthe rack and the other of which isnormally disengaged, means for disengaging said normally; engaging dog,

a spring forspac'ingf'it backward relatively which is normally disengaged, a spring forspacing the normally engaging dog backward on the detent when disengaged, an abntment or stop upon the normally disengaged dog to limit said backward spacing, said' stop being arranged and adapted for movement forward and backward in unison with the normally disengaged dog, whereby the backward spaced position of the normally engaging dog is maintained in a uniform relation to said normally disengaged dog as long as the normally engaging dog is disengaged from-the rack, and means operated by the carriage propelling power for disengaging the normally disengaged dog from the rack.

14:. In a typewriter escapement, the, com bination, with a rack, of a detent and two movable dogs thereon, one of which normally engages the rack and the other, of

which is normally disengaged, a spring for spacing the normally engaging dog backward on the detent when disengaged, an abutment or stop upon the normally dis-.

- engaged dog to limit said backward spacing,

said stop being arranged and adapted for movement forward andv backward in unison with the normally disengaged dog, whereby the backward spaced, position of the normally engagingdog is maintained in a uniform relation to said normally disengaged dog as long as the normally engaging dog is disengaged from the rack, and a beveled face on the normally disengaged dog to permit forward'feed-of the rack prior to the reengagementof thenormally engaging dog with the rack.

15. In a typewriter escapement,the combination of a rack and two dogs one of.

which normally engages the rack and the other of which is normally disengaged but adapted to engage the rack, means operated by a' key for spacing both dogs backwardtogether and-means "operated by.- the, carriage propelling power for spacing both dogs forward together.

16; In a typewriter escape'ment, the combination of a rack' and two dogs one of which normally engages the rack and'the other of which is normally disengaged,

means operated by depression of a key for engaging said normally disengaged dog with the rack and means operated by the carriage propelling power for spacing'both dogs forward together while the normally engaging dog is disengaged from the rack and means operated by the carriage propelling power for lifting the depressed key. f

17. In a typewriting machine, the combination of a type bar, an escapement comprising a rack and two dogs one of which normally engages the rack-and the'other of wh ch is normally disengaged,- means operated by a key, for moving the type bar' to print and for engaging said normally disengaged dog with the rack, and means op-v erated by the carriage propelling power for spacing both dogs forwardtogether while the normally engaging dog is disengaged from the rack and means operated by the carriagepropelling power for starting the type bar back toits position of rest.

18. In a typewriting machine, the combination of a type bar, an escapement comprising two movableido'gs and a detent on which they are mounted and a rack, one of said dogs normally engaging the rack and the other normally disengaged, means operated by depression of akey for moving the type bar to print and for engaging said normally disengaged dog with the rack and for disengaging said normally engaging dog, and means operated by the carriage mam spring for spacing both dogs forward with the rack while the normally engaging H dog is disengaged and means operated by the carriage propelling power ior lift-ing the depressed key and starting the vtype bar. back to its position of rest.

19. In a typewriter 'e'scapement, the combination, with a rack, of a movable dog which normally engages therewith, means for disengaging the dog froin' the rack, means for spacing the dog when disengaged, a stop to limit said spacing movement, a member arranged and adapted to control the rack while the dog is disengaged and to permit feed of 'the'rack under the influence of the carriage propelling power prior to the rengagement of the dog with the rack, means for Varying the rack controlling position of said member and for correspondingly. varying" the position of said stop thereby, substantially as described.

bination, with a rack,- of a :movhble dog which normally engages therewlth, means 20. In a;' typewriter escapeni'ent; the comfor disengaging the dog from therack, 7

means for spacing'thedog backward when disengaged anda stop to limit said backward s'pacilrg movement, a bevel faced mem berarranged and adapted to control the rack while the dog is disengaged and to per- 4 -mit feed of the rack under the'intluence of new" 1 the carriage main spring prior to the reengagement of the dog with the rack, and means for varying the rack controlling position of said member and for correspond:

ingly varying the position of said stop thereby.

rack and for spacing it backward when disengaged, a beveled face on-the normally disengaged dog arranged and adap ted to control the rack when the normally engaging 5 dog is disengaged, a stop on said normally disengaged dog to limit said backward spacing of the normally engaging dog, and means for varying the rack holding position of said normally disengaged dog.

Signed by me in New York city, this 7th day of November, 1902.

FREDERIC W. HILLARD. Witnesses:

Gno. N. CHADwIoK, R. G. DAvIs.

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