US1367145A - Typewriting-machine - Google Patents

Description

H. N. JOSLEYN.

TYPEWRITING MACHsNE. 1 APPLECATION FILED IUNE23. 1915.

15367, .Patented Eeb. 1, 1921.

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y UNITED STATES PATENT OFFICE.

HUBBARDN. JOsLnYN, on sYRAoUsE, NEW YORK, `iissrerron To REMNGTON TYPE- Wnrrnn COMPANY, or TLION, NEW YORK. A OORPORATIONOF NEW YORK.

TYPEWRITING-MACHINE.

My present invention relates to connect-` ;L@ ing devices between disconnectible parts of typewriting` machines and its general object is to provide new and improved devices of the character specified and which promote noiselessness and ease of operation.

e `More specifically stated the object of my invention is to provide automatic means for disconnecting and separatingpawl and ratchet connecting devices which while they may be employed in various constructions are preferably embodied in the connections between the spring drum and the ribbon mechanism of a typowriting machine so that they are effective to connect the ribbon feed-` ingdevices with the spring drum during '5 movement of the carriage in one direction;

but during1 the return or reverse movement, the pawl and ratchet devices are automatically entirely disconnected, `thus eliminating;` the noise due to the clicking or scraping of the pawl idly over the ratchet teeth and also doing away with 'the friction.

'llo the above and other ends my present invention consists in the features of construction, combinations Of devices and ariane/sinceras of parts hereinafter described and particularly pointed out in the claims.

In the accompanying' drawings which illustrate 'the preferred form of my present invention,

Figure 1. is a front to rear vertical`sectional view of so much of a Monarch typewriting machine as is necessary to a complete understanding of said invention which is embodied in said machine.

Fig. 2 an enlarged face view of the spring` drum and associated parte.

Fig. 3 is a vertical sectional view taken en a plane indicated by the dotted `line in l? 2 and lookingin the direction of the arrow.

Fig. t is a fragmentary face view showing the pawl and ratchet devices in different re'u lationships from those shown in Fig. 2.

Fig. 5 is a plan view partly in section 5 showing the pawl and ratchet devices.

Specicaton of Letters Patent.

Patented Feb. 1, 1921.

Application led June 23, 1915. Serial No. 35,838.

As shown in the drawings the main frame of the machine comprises a base 1, posts 2 anda top plate 3 above which are Oppositely zgrooved fixed track-ways 4 that cooperate through anti-friction balls 5 with the slide bar of a carriage 6 on which is mounted aplaten 7. Coperative with the front face of `theplaten are type bars 8 pivotally mounted on a segmenti), each type bar beingl connected by a link 10 with a sublever 11 pivoted to a key lever 12. The set ofkey levers cooperate with a fulcrum plate 13 mounted in the rear partof the base and each is adapted to depress a universal bar 14.- that is carried by a frame having a rod or shaft 15 supported from the sides of the base.k Comprised in said frame is a rearwardly extending arm 16` that is connected by a link or device 17 with a dog rocker 18 pivotally supported on a station'- ary bracket 19 and having pivoted near its upper end two escapement dogs 2O and 21 that cooperate `with a toothed `escapement wheel 22. Operatively connected with the escapement wheel 22 by devices including a shaft (not shown) having a fixed bearing is a feed pinion 23` `that is normally enzraged by a feed rack 24 supported on arms 25 that are pivoted on the carriage 6.

A pin or device 26 that extends downward from the right-hand end portion of the carriage is connected by a band or strap 27 with a cylindrical drum or casing 28, one end of the band 27 being screwed or otherwise secured to the periphery orouter face `Oi. the drum 28 while the opposite end of the band is detachably connected to the pin 26. Said drum 28 is open at its. front side and has fixed to its rea-r Aside by screws 29 a smaller drum 30 containing a coiled main spring 31, the outer end of which is fastened to the drum 30`and the inner-'end to ahorizontal shaft 32 which bears in a portion 19a of the bracket 19. Mounted on a threaded `portion of the shaft behind the bracket or bearing 19T is a ratchet wheel 34 which has a pin and slot connection with saidshaft that arevents relative rotation between them. H1aid ratchet wheel is clamped against a shouldered portionof the shaft by a nut 35, thus fixing the relationship bet-Ween the shaft and the ratchet wheel. Cooperative with the ratchet wheel 3a is a double toothed pawl. 36 pivoted on the bracket 19 and provided with `a, finger piece 37 which may be manipulated to vary the rotative position of the shaft and so regulate 'the tension ot the motor or main spring 31. Normally the shaft is locked against rotation by the coperation ot the pawl 36'with the ratchet wheel 34. Rigid f ith the drum or casing 28 is a forwardly projecting hub 38 that bears on the forward, reduced end portion of the shaft 32, said hub portion being provided with a flange 39 and having threaded into its Jfront end a headed screw 40. Loosely` mounted on the hub 38 and confined between the flange 39 and the head of thescrew 4G is a beveled pinion 41 having a rearward extension or hub 42 on which are mounted tace to tace two ratchet wheels 43 and 44, the forward ratchet v-.fheel 43 `being slightly dished so that the sets ot ratchet teeth are separated a little trom each other. The rear end ot the hub 42 is spread or upset, thus clamping the ratchet wheels 43 and 44 tightly between the upset portion and the back face of the pinion proper 41. In effect the gear and the two ratchet wheels operate as a single piece, being capable ot turning as one on the hub 38.

Means to be hereinafter described and embodying the gist of my present invention are provided for connecting the ratchet wheel 44 with the drum 28 so as to cause the ratchet wheel to turn with the drum during letter space movements of the cai'- riage.V This movement of the ratchet wheel is transmitted to the pinion 41 which is rigid with it and from the pinion tothe ribbon feeding mechanism. A. pawl member or gravity detent 45 coperates with the ratchet wheel `43 to prevent backward rotation oi".

said ratchet wheel and the'parts rigid therewith. Said detent terminates at its tree or lett hand end 11i a rearwardly bent tooth portion which overlies the ratchet wheel 43 andfv coperates therewith. At its righthand end the detent is provided with a U-shaped bearing portion 46 perforated to bear on a screw pin 47 secured in a portion 19" or' the bracket 19 just below the top plate.

The inking ribbon 48 is wound onspools 49 arranged forward of the top plate, one at each side of the machine. Midway between the spools the ribbon is threaded through a ribbon vibrator 50 which is slidably mounted on a guide 51. The stem of the vibrator is pivotally connected with an operating lever'52 which is tulcrumed at 534 ona bearing member 54 depending from the top plate, The rear arm of the operating-lever has a slot 55 which is engaged by an actuating pin 56 projectino` laterally from the upper end of the link 57, said link 'being pivotally connected to the arm 16 ot the universal bar. frame. The construction isV such that whenthe universal bar 14 is depressed the link 57 will actuate the operating lever 52 which will raise the vibrator 50 and bring the ribbon opposite the printing point at the front of the platen and into the path oi' the actuated type bar. The position of the operating pin lengthwise .ot the slot 55 may bc varied in the usual way. by devices comprising the adjustable rotary member 57, to vary the widi'ghwise portion of the ribbon that is presented to the types. Each ribbon spool 49 is mounted on the upper end ot a vertical shai't 58 having a stationary bearing 5S). Fixed to the lower end oit each shalt is n small beveled gear wheel G0 with which constantly meshes a beveled pinion G1 lined to the iorward end of a shaft G2 which bears in lugs` G3 depending from the top plate and extends horizontally rearward. Fixed to the rear end oli each shaft G2 is :i beveled girar wheel 64 which is adapted to inesh with one oi a pair ot beveled gen' wheels 55 that are iixed to a ribbon driving` shaft (i6 extending from side to side ot the machine below the top plate and mounted in bean ings depending therefrom. The driving shaft 6G is movable endwise to bring either gear wheel G5 into mesh with its comp iion gear G4 and thereby connect the associate ribbon spool with the iihlfon driving; dritt, the other ribbon spool at the kfaine time bcing disconnected therefrom. The driving shaft is connected with the beveled pinion 41 by a beveled pinion G7 which is slidahiy mounted on the driving .shalt .36 hut connected therewith that said shaft will always be turned when said pinion is turned. although the sha tt may move endY wise without affecting the pinion (ST which always remains in mesh with the pinion 4l. moifing the shaft 6G hack and forth eiidwise which may be done either by hand or automatically in the usual wu lien spools may be connected in l to the ribbon by the drvi` the direction of longituor leem o."Y the ribbon may be reversed. ll the parts hereinbetore described are or may be such :is are common to the Monarch ty; cv-:iitinn` machine.

The iresent exeniplilication ot my i tion embodies novel iawl nicf:-li.-'n` connecting the spring drum or drii i able ele-nient through t. with the ribbon drivii moi e element 4i. effective when the d 1w iu the direction oit the aimw (Figi. Qi to the carriage lettward: lint s nisni automatically separa from i'hi` ratchet wheel 44 when the direction ol Voir. tion of the spring drum is rcversid the carriage is restored or moved li;i .-.\-.:iri'i from left to right. Said pawl mechanism comprises a pawl G8 pivoted on a headed shoulder screw G9 which is threaded into thm li-o llii

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lill) Afl t near its periphery, a washer 7() being interposed between the bottom of the drum 28 and the pawl as best shown in Fig. 3. The construction is such that the pawl is always maintained in the plane of the ratchet wheel although it may turn on its pivot so as to engage with and disengage from the teeth of said ratchet wheel. interposed between the :tooth of the pawl 68 and its pivot G9 is a bow spring 7l, the loop of the spring extending to the opposite side of the pivotal axis of the pawl `from the pawl tooth. @ne end of the spring is vprovided with an ear 72 which is perforated to receive a headed screw 73, said screw being threaded into the pawl 68 between its pivot and its tooth or free end and thus iixedly clamping one end of the spring to said pawl. The opposite or free end of the spring is bent slightly down ward as indicated at 74 so as to engage with the teeth of the ratchet wheel 44. The constant tendency of the spring is to expand,`

that is, its opposite sides or blades tend constantly to move away from each other. This or engaged with the ratchet wheel 44 shown in Fig. 2.V The instant, however, that the pull of the main spring 3l is withdrawn, which. occurs when the carriage is started toward the right and the directionof `rotation of the spring drum is reversedas indi-` cated by the arrow in Fig. 4, the bow spring 7l will expand and forcethe pawl 68 out of engagement with the ratchet wheel 44. At

the same time that the Sides of thespring 71 separate further, the spring as a whole, since it is rigidly connected to the pawl, will turn about the axis of thepawl as the pawl itself turns and said spring will, as a whole, approach closer to the ratchet wheel 44. As a result of the initial turning of the spring drum in reverse direction the parts will be brought to the position shown in Fig. 4. Thus the pawl '68 is automatically entirely disconnected from the ratchet wheel and the connection between the spring drum and the ribbon feeding devices or mechanism is automatically broken, so that the noise. due to the clicking of the pawl, heretofore employed, over the ratchet wheel during return movements of the carriage is avoided, the v only sound from the pawl mechanism being that due to the slight click of the free end portion of the spring 7l over the teeth of the ratchet wheel 44. This sound is `so slight as to be scarcely noticeable.` At the end of the return movementof the carriage and the withdrawal of rightward pressure by the operator therea ainst, the main spring operates automatica ly to restore the pawl 68 to the F i0. 2 or operative position, so that dur ing leftward movements the ribbon feeding mechanism will again be operatively connected with the spring drum.

Thus it will be seen that the novel pawl and ratchet mechanism or connections between the carriage power or motor and the ribbon feeding mechanism is rendered automatically operative and inoperative in alternation in correspondence with movements of the carriage and the spring drum. Said mechanism embodies a pawl and spring means constantly tending to hold or turn said pawl out of engagement with its ratchet wheel, said spring means boing overcome by the turning movement or rotation of the spring drum or movable element in one direction, and being rendered effective by the turning of the spring drum or element in the opposite direction. While it is prefer able shown to employ said spring means itself as a connection between the pawl and its ratchet wheel., this construction may be changed without departing from some of the principles of my invention.

It will be observed further that by my present invention there are provided two `movable elements, viz., the casing or drum that is turned by the main spring and the beveled pinion 41, in combination with pawl and ratchet connections between said elements, means, viz., the bow or loop sprin in the present instance, which. engages sai ratchet and constantly tends to separate said pawl and ratchet connections, and means, viz., the carriage main spring, which operates during certain movements of one of said movable elements to overcome the spring and force the pawl and ratchet to operatively engage; that the certain movements referred to are rotary movements of the 'springdriun in the direction in which it turns to draw the carriage in printing direction; that when the carriage is restored and the element or spring drum moves oppositely or turns in the reverse dircl'ction the loop spring becomes ef-` fective to separate the pawl entirely from theratchet wheel; that the free end of said spring constantly engages with the teeth of said ratchet wheel that ribbon feeding mechanismis constantly connected to the driven element or beveled pinion 4l; that the ratchet Wheel is co-aXial with the spring drum or carriage motor; and that the ribbon mechanism is constantly connected with said ratchet wheel. p

Various changes may be made without departing from the spirit and scope of my invention. i

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

1. In a typewritin machine, the combination of two movab e elements, pawl and ratchet connections between said elements,

said connections when engaged with each other moving with said two movable elements, and Vmeans constantly tending to separate said pawl and ratchet connections, one

"of said-'movable' elements operating automatically to overcome the tendency of said means and to maintain said pawl and ratchet Vconnections normally operatively engaged.

f separate-,the pawl from the ratchet, one of said movable elements operating automatically to overcome the tendency ot said spring yandto maintain said pawl and ratchet connections' normally operatively engaged.

3, In a typewriting machine, the combination of two movable elements, automatically engageable and disengageable pawl and ratchet devices between said elements, said devices being normally engaged and when engaged vwith each other moving with said vtwo movable elements in one direction ot' rotation, and means constantly tending to separate said pawl and ratchetdevices, said means being overcome by one of said elements movingV in one direction but allowed to exercise its said tendency when said element is moving in the opposite direction..

Ll. In atypewritmg ma chine,the combination of two movable elements, pawl and Vratchet connections between said elements,

said connections being automatically and normally engaged with each other and when so engagedwith each other moving with said two movable elements, and means engaging the ratchet and constantly tending to separate the pawl from the ratchet, said means being overcome when one of said two movable elements is moving infone direction but allowed to exercise .its tendency to separate the pawl from the ratchet when said movable element ismoving in the opposite direction.

5.2111 a typewriting machine, the combination of a motor, motor driven mechanism.. connecting devices comprising a pawl and ratchet wheel between said motor and said mechanism, both said connecting devices when operatively engaged moving with said motor, and means constantly engaging with saidv ratchet Vwheel and tending to separate said pawl therefrom, said motor being etliective; automatically to overcome said means and normally maintain said pawl in engagement rwith said ratchet wheel. Y

6. In a typewriting machine, the combi-- nation of driving mechanism, driven mechanismy devicesY comprising a pawl and a l ratchet wheel Yfor connecting lsaid ydriven mechanism with. said .driving mechanism, saidpawl and said ratchetwheel 'when engaged both moving when said driving mechanism moves, and a spring tending constantly to separate said pawl troni said ratchet wheel, said driving mechanism antomatically overcoming said spring and normally maintaining said pawl in elliective engagement with said ratchet wheel.

7. In a typewriting machine, the combination of a spring drum, pawl pivoted thereon, a ratchet wheel with which said pawl cooperates, said pawl and said ratchet wheel when engaged both moving when said spring drinn moves, driven mechanism operatively .connected with said ratchet wheel and a spring tending constantly to throw said pawl out of engagement with said ratchet wheel` said spring drum being automatically clicctive to overcome said spring and normally maintain said pawl in operative engagement with said ratchet wheel.

S. ln a. typewriting machine. the combination of a spring drum, a ratchet wheel coaxial with said spring drum, a pawl pivoted on said spring drum for cooperation with said ratchet wheel, said pawl and said spring drum when cooperative both moving when said spring drum moves, driven mechanism constantly connected with said ratchet wheel, and a spring tending constantly to throw vsaid pawl out et' engagement with said ratchet wheel, said spring drum being automatically eliective to overcome said springand normally maintain said pawl in to said pawl, the other end ol* said spring I engaging with the teeth of said ratchet wheel, said. bow spring being overcome b v said spring drum which maintains said pawl normally engaged with said ratchet wheel.

10. In a typewriting machine, the combination of a spring drum, a pawl pivoted thereon, driven mechanism, a ratchet wheel connected to said mechanism and coperating with said pawl, and a bow spring secured at one end to said pawl, the other end of said spring engaging with the teeth ot said ratchet wheel, said spring drum normally forcing the leaves ot said bow spring to contract and thus to maintain said pawl normally in cooperative engagement with said ratchet wheel, the leaves of said bow spring` expanding and throwing said pawl out of engagement with said ratchet wheel when the direction of rotation of the spring drum is reversed.

1l. ln mechanism of the character described, the combination of a spring drum, a pawl pivoted thereon, a ratchet wheel cooperative with said pawl, a bow spring secured at one end to said pawl and having its other end engaging' with said. ratchet wheel, a second ratchet wheel rigid witl said first ratchet wheel, and a detcnt pawl cooperative with said second ratchet wheel to prevent backward turning oi' both of said ratchetl wheels.

l2. In a typewriting machine, the combi.- nation of a spring drum; a pawl pivoted thereon; driven mechanism comprising a ratchet wheel for coperation with said. pawl, and a bow spring secured at one end to said pawl, the other end ot said spring engaging with the teeth oi said ratchet wheel; a second ratchet wheel rigid with said tirst ratchet wheel; and a detent pawl coperative with said second ratchet wheel to prevent backward turning of both of said ratchet wheels. y

13. ln a typewriting machine, the combiu nation of two movable elements, pawl and ratchet connections between said elements, .said connections when engaged with cach other moving with said two movable ele ments, means constantly tending to separate said pawl and ratchet connections, and means constantly connected with one oi? said movable elements and normally operating to overcome automatically the tendency of said tiret recited means and to maintain said pawl and ratchet connections normally operatvely engaged.

14. In a typewritin machine, the combination" of two movab e elements, pawl and ratchet connections between said elements, said connections when engaged with each other moving with said two movable elements, a spring constantly tending to separate the pawl 'trom the ratchet, and means constantly connected with one of said movable elements and normally operating to overcome automatically the tendency of said spring and to maintain said pawl and ratchet normally operatively engaged.

15. 'In a typewriting machine, the combi nation of two movable elements, pawl and ratchet connections between said elements, said connections when engaged with each other moving with said two movable ele-` ments, means engaging the ratchet and con stantly tending to separate the pawl from the ratchet, and means normally operating to overcome automatically the tendency ot said first recited means and to torce said pawl normally to engage operatively with said ratchet.`

Signed at Syracuse, in the county of On ondaga, and State of New York,` this 21st day of June, A. D. 1915.

HUBBARD N. JOSLEYN. Witnesses:

RAYMOND L. WILLLAMS, CnAs. PRATT.

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