US975168A - Type-writing machine. - Google Patents

Description

A. W. SMITH.

TYPE WRITING momma.

' APPLIOATIO! FILED MAR. 11, 1910. i 975, 168, Patented Nov. 8, 1910.

2 sums-si n 1.

\/\/ITNElSSES= VENTEIR HISATTDRNEY A. w. SMITH. TYPE WRITING MACHINE.

APPLICATION FILED MAIL-11, 1910. 975, 1 68, Patented Nov. 8, 1910.

2 SHEETS-SHEET 2.

- HISATTEJRNEY STATES PATENT OFFICE.

COMPANY, or r r'oN, NEW YORK, A-CORPORATION OF NEW YORK.

TYPE-WRITING- MACHINE.

Specification of Letters Patent. I

Patented m. s, 1910.

Application filed March 11, 1910. Serial No. 548,578.

To all whom 'it concern:

Be it knownthat I, ARTHUR W. SMITH,

. citizen .of the United States, and residentof the borough of Manhattan, city of New York, in the county of NewfYork and State of New York, have invented certain new and. useful Improvements in Type-Writing Machines, of w ich the following is a specification.

My invention relates devices for such machines.

. Heretofore great objection has been found- .-t the noise produced through the operav,ti lon} of the carriage escapement mechanism of typewriting machines, the noise .ordimost pronounced at each. drop of t e carriage in the letter feed movements thereof.

narily bein One of the main objects of my invention is to provide simple and eflicient mechanism to overcome these ob'ections, the mechanism being so constructe as to greatly reduce or entirely eradicate the noise "ordinarily produced by an operation of the escapement devices.

j the above and other ends which will "hereinafter appear my invention consists ,v

in the features 0 construction, arrangements of arts and combinations of devices .to be hereinafterdescribed and particularly pointed outin the appended claims.

In ,the' accompanying drawings wherein like reference characters ind cate corre sponding parts in the various views, Figure list a vertical central fore and aft sectional view showing a sufiicient number of parts of one form of typewriting machine to illustrate my invention in its embodiment therein. ..Fi 2 is an enlarged detail fragmentary p an view showin parts of the escapement mechanism. ig. 3 is an enlarged I detail perspective view of the feed dogs and carrier on which they are formed.

-I have shown my invention embodied in tlife present instance in a Yost visible machine but it should be understood that the invention may be embodied in various styles of typewriting machines and that the es capement devices may be variousl arranged, constructed and applied within the broad aspects of my invention, the particular construction in the presentv to typewriting machines and more particularly to escapement being but one form which I have chosen to illustrate my invention, although from ceroppositely grooved rails 7 formed as a part of a carriage 8 provided with upwardly extendlng end plates 9 to which parallel links 1.0 are pivoted at 11, the forward ends of said links being pivoted at 12 to a platenframe 13 which supports a cylindrical platen 14. The carriage has pivoted thereto at 15 depending arms 16 which carry at their lower ends a feed rack 17. The depending W. smrrn, or NEW YORK, N. Y., ASSIGNOR r0 YOST WRITING MACHINE arms 16 are likewise provided with rearwardly extending arms 18 with which leaf springs 19 coiipera'te to, move the arms 16 forwardly around their pivots to maintain the feed rack 17 in mesh with its cooperative feed pinion 20. The feed pinion 20 is fixed to a shaft 21 supported by a bracket arm 22 at the upper end portion thereof and supported at its lower end by a bearing screw 23. An

escapement rack 24 which in the present in stance is shown as a circular rack or escapement wheel, is operatively connected to the shaft 21 by the usual clutch mechanism contained within a housing 25. A spring drum 26 has a cord or band 27 connected at one end thereto, the other end of the band being connected to the carriage to move it from right to left across the machine under control of the escapement mec'hanism. Key levers 28 are pivoted at. 29 to an auxiliary frame 30 secured to the main frame of the machine. Each key lever is provided wit-h a finger ke 31. connecte to an upwardly extending link 32 which in turn is connected at its upper end to the forwardly extending arm of an angular lever 33 pivoted at 34 to a hanger 35.

Each key lever is pivotally.

The upwardly projecting arm of each angular lever is connected to'the forward end of a pull link 36 which in turn is connected.

atits rearend to a driver 37 pivoted at 38 to a hanger 39. The driver 37 is pivoted intermediate its ends, as at 40, to a type bar proper 41. The forward end of the type bar is pivoted at 42 toa guide link the rear or type carrying end of the bar normal y bearing against the face of an ink pad 44. At each depression of the finger key 31 the type carrying end of the associated type bar moves in the path indicated by the dotted line in F ig. l and strikes against the front face of the platen.

The parts of each type action are assisted in their restoration to normal position by a restoring spring i A universal bar it? ex; tends beneath the he;' levers and is operatively and adjustably-connected to a. rock shaft 47 by screws The rock shaft 47 constitutes part of a dog rocker which is mounted to turn on pivot screws l9 received in tapped openings in the side plates 1 of the machine. The rock shaft is provided with a rearwardly extending bifurcated arm .50 which is adapted to receive in the slot- 51- thereof an arm 52 formed as a part of a sheet metal dog carrier 53 The dog carrier is struck up as shown in detail in Fig. 3 to provide two rigidly connected feed dogs til and 55 spaced apart as shown-in Figs. 2 and An arm or pro ection 56 is formed on the carrier and is resilient so a's'to constitute a sprin for normally maintaining the carrier and .eeddogs in normal position and in fixed relation with reference to the dog rocker. A pivot pin.57'passes'through openings in.the bifurcated rocker arm 50 and through an opening 58 in the. dog carrier so asto provide a pivotal connection between the feeddog carrier and the arm 50. The

' rock shaft 47 is provided with a. slot or cutout 59 at one side thereof for the reception of the lower free end of the spring member" or portion 56 of the dog carrier. Thus it will be understood that the lower free end of the spring is anchored to the rock shaft 47, whereas, the'part intermediate the lower end of the spring and the body portion of the dog carrier is adapted to he flexed as will hereinafter more clearlyappear.

The construction and arrangement of the feed dogs is such that the escapement wheel 24 normally bears against the feed dog 55. The pressure of the escapement wheel under the power of the springidrum 26 is effective normally to slightly. flex the spring 56, turn ing the dogcarrier 53 slightly on the pivot 57 as indicated in Fig. 2, although the power of the spring 56 is preferably such asfto sub stantially balance: the effective powerv of the A depression of a finger vkey 31 o'r'of the space key 31 isefl'ective to depress. the universal bar, thereby turning the rock shaft 47' i and elevating the feed dogs to carry the dog 55 out of-engagement with the engaged tooth a of the escapement wheeland bringing the toot-h 54': into thepatlr of. theoncbming, p re- .111 the present instance. -"As pressure is released on the depressed finger key the universal bar and dog rocker are restored-to normal position by a spring 60, thus again lowering the dog 55 into the path of the oncoming tooth b of the escapeinent wheel and disengaging the feed dog 54 from engage ment with the tootha. This movement of the dog rocker aflordsa half drop of the escapeinent wheel duringf'the movement of the tooth 6 into engagement with the feed dog, 55. It will be understood that at each half drop of: the. escapelnent wheel the im pact of the wheel. underjthe power of the carriage spring is received against one of the feed dogstii and which are rigidly connected together and are fixed orfheld against feed movement These dogs; however, are resiliently supported by the spring 56 Whichresists the novemennof the dogs;

from normal position, and the'shock of impact at letter space movements of the escape ment wheel and the weight of the spring-inn pelled carriage against-the feedfdogs is borne and resisted wholly tyne spring 56 which resiliently receives and absorbs the shock and greatly reduces or' entirely 'eradicat e's the no1se ordinarily incident to an actuation of the escapement mechan sm. The constructi'on and arrangement of the parts and such that the spring 56 "will he but very slightly overcome or fiexedby the pressure of the carriage spring exerted through the escapement wheel on the feed dogs. flexure' of the spring 56 under impact of the teeth of the escapement Wheel on the feed dogs may vary in; degree depending on the or having an appreciable effect upon the let'- ter space movement ofthe carriage. It should be understood that at each letter feed movement of a power driven. carriage a V the tension-of the spring 56 are preferably The r sho'ck'isgordinarily exerted throughout the entire train of connections between the can riagg a'nd the final point" of resistance or support. In the present construction the final point of resistance would be the shoul-:

dered pivot 49 which is the pointat which the thrust of the dog rocker under the im-' pact of the escapement wheel on the dogs is communicated to the solid frame-Workjof the machine. v

' 'l Vhilein the present instance I have elected to'plac'e the spring 56 in the position shown to absorb the shock and thus provide a practicallynoiseless escapement, I may,

nevertheless, from the broader aspearts of my invention, place the spring at any point in the train of connections between -the carriage and the final point of resistance. Thus for example, I have disclosed in a companion application Serial No. 548,57 9, filed of even date herewith a spring that opposes axial movement of the dog rocker 47 to the right so that the shock is borne at the point of final resistance. Certain of the claims contained herein are intended to cover such a construction. It will be understood there fore that various changes may be made without departing from my invention.

'Within certain other aspects of my invention any spring means which wholly supports one of the escapement members or wholly and resiliently resists the impact of one escapement member on another at the letter space movements of the carriage,and when the carriage is brought to rest by said escapement members, may serve the purpose of my present invention.

It will be observed that the devices of my invention are simple in'construction and are efiicient in use, and in accordance with the construction as shown in the present instance the carrier 53, feed dogs 54: and 55 and spring 56 may all be made from a single piece of sheet metal, and the spring 56.directly' supports and resiliently resists the movement of the feed dogs in a letter-spacedirection under the pressure or impact of the teeth of the escapement wheel thereon. Moreover, it will be seen that the feed dogs are adapted to move with the dog rocker in a direction transverse to the plane of the escapement wheel and that the feed dogs and the carrier 53 are also pivoted at 57 to receive a slight movement in a direction at right angles to the transverse, or first mentioned, direction of movement of said dogs.

Although this movement of the feed dogs around the pivot 57' produced at a flexion of the spring 56, is in the general direction of the movement of the escapement rack, such movement is insuflicient to produce or in any manner effect a letter space movement of the escapement, which latter is e'fl'ected and determined in the present instance wholly by the drop between the teeth of the escapement wheel and the dogs. The feed dogs-may therefore be properly referred to as fixed or held against letter space movement. '1

\Vhile ordinarily the spring 56 wliolly resists the movement of the carriage under power of the spring drum thereof and as-a consequence. constitutes a cushion or resilient support for the carriage, yet in exceptional circumstances the arm 52 may be moved sufficiently far to contact with the lower anchored portion of the spring 56' and thus positively arrest the pivotal movement of place on rare occasions as when a positive pressure is exerted, by hand or otherwise, to move the carriage in the direction of its feed while the feed rack 17 is engaged with its cooperative feed pinion. The arm 52 contacting with ,the spring 56 therefore merely operates to oppose apositive resistance in exceptional circumstances and acts as a safety=device to prevent an overfiexing of the spring 56 and a possibility of injuring the spring or other parts 'oi fl e mechanism by such undue fiexmg of the spring.

IV hat I claim as new and desire to secure by Letters Patent, is p 1. In a typewriting machine, the combination of a power driven carriage, escapement devices which afford a free unretarded movement of the carriage at each letter feed, movement thereof, and a shock absorbing spring intermediate the carriage and thedue to the arrest of the carriage at the termination of each letter feed movement is absorbed.

2. In a typewriting machine, the combination of a carriage, a feed rack, one or more feed dogs, the construction of the parts being such that an intermittent step-by-step feed movement of the carriage .is aflorded by a drop between the feed rack and dog or dogs, and resilient means for receivmg the weight of the carriage at each (4 drop? I 3. In a typewriting machine, the combination of a carriage, a -feed rack, two feed dogs cooperative therewith, and spring means I cooperative with both of said dogs, to resist a movement thereof from normal position.

4:. In a typewriting machine, the combina- U011 of a carriage, a feed rack, two feed dogs cooperative therewith, and spring means cooperative with both of said dogs to'resist .a movement thereof from normal position,

the construction of the parts being such that a feed movementiof the carriage is afforded by a relative drop between the feed rack and dogs. v

5. In a typewriting machine, the combination of a carriage, a feed rack, two rigidly connected dogs, and spring means for aflording and resisting a slight movement of both of said dogs due to the shock of arrest at the end of a stepping movement of said rack.

6. In -a typewritin machine, the combination of a carriage, a eed rack, two feed dogs separated to afford a drop of the, feed rack from one to the other, a.nd spring for resisting the movement of both of said dogs in the direction of the feed movement of said rack.

7. In a typewriting machine, the combination of a power driven carriage, a feed rack, a dog. rocker, two feed dogs carried by said dog rocker and which are moved by the dog rocker transversely to the plane of the feed rack, and spring means which resists the movement of both of said dogs from normal position and in the direction of the feed movement of the feed rack.

8. In a' t-ypewriting machine, the combina tion of a power drivencarriage, cooperative escapement devices, and a spring the power of which substantially balances the power employed to move the carriage and which with said cooperative escapement devices resists the feed movement of the carriage at the termination of each intermittent feed movement thereof.

9. In a typewritingmachine, the combination ofa power drii'en carriage, cooperating escapement devices constructed and arranged to afford a feed movement of the carriage by a free drop between one escapement device and the other, and spring means which absorbs the shock of each drop.

10. In a typewriting machine, the combination of a power driven carriagean cecapement member comprising a rack, a cooperative escapement member comprising feed dogs both of the latter being. held against letter-space movement, and spring means for absorbing the impact of the rack member on. the dog member.

11. In a typewriting machine. the combination of a. power driven carriage, a feed rack, feed dogs cooperative therewith, both of aid feed dogs being heldagainstletter-space movement-,and spring means wlnch resists the power employed .to move the carriage and which. resists the movement of said dogs in a letter space direction.

12. In .a typewriting machine. the combination of a power drivencarriage. a feed rack, two rigidly connected teed dogs cooperative with said feed rack, 21 dog rocker. a carrier for said feed dogs, said carrier being pivoted to the dog rocker to afi'ord a movement-of the dogs in thedirection ot the feed movement of the rack, and spring means which resistthe said pivotal movementof said carrier. n":

13,. In. a typewriting machine, the combination of a power driven carriage, a feed rack, and two feed dogs which cooperate with saidifeed rack, said dogs being held against letter spa'ce' movement but slightly mbvablein the direction of the letter space movement of the feed rack and resiliently supported. to absorb the impact Ofthe rack against th dogs.

14. In a typewritingmachine, the combination of -a power driven carriage, a feed rack, a cooperative e capement member comprising two rigidly connected feed dogs, and spring means which resist the movement of said dogs in the direction of the feed movement of the rack;

15. I11 a typewriting machine, the combi In a typewriting machine, thecombi- "112111011 of a power driven carriage, a feed rack, and a cooperating escapement member comprising two rigidly connected feed dogs, a spring arm to which said dogs are connected, a dog rocker on which said rigidly connected dogs are pivoted, and means for connecting said spring arm t0. the dog rocker, so that the spring arm will resist the movementof therigidly connected dogs with thefeed rack in a letter feed direction. 17. In a typewriting machine, the combination of a power driven carriage; two escapement members for controlling the movement of the carriage, one ofsaid members being driven by the carriage and the other controlling the movement of the driven member; anda spring which constitutesthe sole resistance to the movement of the controlling memberunder the action of the car-. riage driven member thereon, so that said spring alone resiliently supports the con:

trolling escapement member. against the power which tends to move the carriage.

18. In a 'typewriting machine, the combination of a power driven carriage, two escapement members for controlling'the move.- ment of the carriage, one of said members being driven by the carriage and the other controlling the movement of the driven member and receiving an impact therefrom' at the end of each letter feed movement of the carriage, and a spring. which through its resistance receives the impact of thecompanion or carriage driven member at the end of each letter feed movement of the carriage nation of a power driven carriage, and two cooperating escapement members therefor,

- one of said esca, ement. members moving u-n-. der control of t Ing held againstletter s ace movement but spring supported to w olly resist by its e carriage and the other hespr ng support the impact of the other or carriage driven escapement member thereon "at each letterspacemovement of the car.-

rlage.

21. In a typewriting machine, the combination of a power drlven carriage, two eoope'rating escapement members therefor, one 0 said members being-a rack driven by the carriage and the'othercomprising two feed dogs rigidly connected and held against letter space movements, and a spring rigidly connected to said dogs and which receives and wholly resists the impact of the rack on said dogs.

l In a-typewriting'machinepthe combinat1on of-a power dr ven 'carriage two coo o rating escapement memberstherefor, one- 0 said membersbeing a rack driven by the carriage and vthe other twofeed dogs rigidly connected' and held, against letter space movements but mounted. for movement transversely of the rack, said dogs being ar:

"ranged to afiord a partial drop of the Cal?- riage at each transverse movement in one direction and at each transverse movement -in the opposite direction, and s ring means which "wholly support the ogs against movement -ina letter feed direction and wholly resist the impact of the rack on the dogs at letter space movements.

23.;In 'a'ttypewrit-ing machine, the combination'of apower driven carria e, an escapement rack, rigidly connected eed do arranged to afi'orda half drop at 63.0 forwardandat each backward movement of the feed dog'SQa do rocker to which the rigidly connect'ed' fee dogs are pivoted an by which they are moved transversely of the feed rack, and a spring-rigidly connected to the feed dogs and to said dog rocker and which constitutes the means by which the p feed'do'gs. are prevented from receiving a let ter space movement and which resists the im- 'nationof a spring driven carriage, two espactjof the rack on the'dogs during the letter feed movements of the carriage and 're'-' siliently suplorts the feed dogs when subjected to sucli impacts, the resilient support of the dogs being afforded by said s ring and by. the pivotal connection by whic the dogs are connected to the do rockers In a typewriting mac ine, the combicapementmemberswhich cooperate to control thefeed movement of the carriage, one

a power of the" carriage spring, the energy of f the s of saidmembers being '5 ring supported to resist themovem'ent of t e other under the ring of saidsprin supported member a one s'upporting- -an ol of t e amig P fi-P rfl, i;

.nation of a spring rack at eachforward an resisting:aflett'er 30. I:n aftype wlfi feed movement of both members under conment..members, one resilient-1y 1 25. In a typewriting machine, thecombidriven carriage, an 'es-' capement rack, an an escapemen't dog member, said dog member comprising a piece of sheet metal formed with two dogs and an integral 5 ring which resists the movement of said (i thereon.

26. In a typewriting machine, the combination of a sprin driven carriage, an escapement'rack, an an escapement dog memher, said dog member comprising a piece of sheet metal ormed With two dogs which are spaced apart to afiord a artial' drop of the d ateach backward movement of the dogsthrough the rack, and an integral spring. which resists the movement of said dogs under pressure of the rack thereon. v p

27. In a typewriting machine, the combinationof a power driven carriage, a final 7 point of resistance-which opposes the movement of the carriage atletter feed movements, and intermediate connections between the carr age and the sa d final oint of res1stance, sa1 d connectlons mclu mg escapement'devices which aiforda free drop of the carriage at each. letter feed operation, and a cushion, the cushion resisting the force of the carriage in its letter feed movement only at'thetermination of such letter feed movenation of a ower driven carriage, escapeogs under pressure of the rack ment mechanism therefor, and a spring intermediate the carriage and-the finalpoint of'resista-nce to' the letter feed movements of the, carriage exerted through the'e'scapementdevices, said spring being operative to sustain 'the ,escapemen't device'sagainst letter feed movement under the power of the carriage applied'tosaid devices and to absorb ments of the carriage.

the shock produced bythe step-by-step move- 29. In a typewritlngmachine, the combination of a power driven carriage; escapement mechanism therefor, said. escapement mechanism including an escagement device driven by the power'employe to move the carriage, .acooperative escapement device to yresist" said movement of said first-mentioned escapement member, a support for-the second mentioned escapement device, and a spring interposed between said support and sa d second mentioned jesca'pement device, said spring being operative to prevent letter feed movement of said second mentioned-devices under t Power o t car iage pp i d thereto andto absorb t shock-produced by the step by-step fee nation of a carriage, two} cooperative escape- M ene qi, the ear- I 1 machine, the; combisupported to resiliently resist themovement of the carriage at the termination of the feed movement of the carriage, and means whereby a positive resistance is ofiered to the movement of the carriage when undue pressure is exerted thereon.

31. In a typewriting machine, the combination of a carriage, a feed rack, one or more feed dogs, the construction of the parts being such that an intermittent step-b v-step feed of said dogs when undue pressure is exerted on the carriage.

33. In a typewriting machine, the combination of a spring driven carriage, two escapement members which cooperate to control the feed movement of the carriage, one ofsaid members being spring supported to resist the movement of the other under the power of the carriage, tl'ie'energy of said spring supported member alone supporting and resisting a letter feed movement of both members under control of the carriage spring, and means whereby a positive resistance is offered to the spring supported mem her when undue pressure is exerted on the carriage.

34. In a typewriting machine, the combination of a power driven carriage, a feed rack, two feed dogs which cooperate with said feed rack, said dogs being held against letter space movement but slightly movable in the direction of the letter. space movement of the feed rack and resiliently supported to absorb the impact of the rack against the dogs, and meanswhereby said dogs are rigidly supported when undue pressure is ex erted on the carriage.

In a typewritmgmachme, the combination of a power driven carr age, two cooperative escapement members one of which receives a blow from'the other at the end of -'each letter feed movement of the carriage,

and a cushion interposed in the train of coi1- nections between one of said members and its fina'l point of support or resistance, said cushion beingoperative to receive and absorb the blow of one of said members on the other at the'end. of each letter feed movement of the carriage. I

Signed at the borough of Manhattan, city of Xew York, in the county of New York and State of New York, this 10th day of March. A. D. 1910.

/ ARTHUR XV. SMITH. \Vitnessesr 1 CHARLES E. SMITH, E. -M. WELLs.

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