US981657A - Stop for universal bars of type-writing machines. - Google Patents

Description

W. P. KIDDER & G.-W. SPONSEL. R UNIVERSAL BARS OF TYFE WRITING 11111011111 STOP F0 1905. RENEWED JUNE 3, 1910,

APPLIQATION FILED SEPT. 11 Patented Jan. 17, 1911.

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/%l /VVEIVEOH$ ATTORNEYS WEE;

WITNESSES.

W. P. KIDDER & 0. W1 SPONSEL.

STOP FOR UNIVERSAL BARS OF TYPE WRITING MACHINES. APPLIOATION FILED SEPT. 11, 1905. RENEWED JUNE 3, 1910.

2 SHEETS-SHBET 2.

WITNESSES.

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. elements and arran of such construction as UNITED STATES PATENT OFFICE.

OF HARTFORD, CONNECTICUT}.

wnLLmeroN r. xrnnnn, or Bos'roN, massacrrusnr'rs, AND cHAnLns w. sroNsnL,

assronons, BY.M1NE nssronmnn'rs,

TO THE NOISELESS TYPEWRITEB- COMPANY, OF MIDIDl'ali'l-ONN', CONNECTICUT LCOBPOEA- 'IION OF CONNECTICUT.

I .s'ror ron unrvnnsansans or 'rYPE-wnrrmoi macnmns;

Application filed September 11, 1905,

Specification of Letters Patent.

Patented Jan. 17, 1911.

Serial No. 277,914. Beneviedl'une 8, 1810. Serial No. 564,855.

To all whom it may concern:

Be it known that we, 'WELLINGTON P. Kinmm and CHARLES W. Sronsrn, residing, re- ?pectively, at Boston, in the county of Sufolk and State of Massachusetts, and Hartford, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in tops for Universal Bars of Type-WVriting Machines, of which the following is a full, clear, and exact description, such as will enable others skilled in the art to which it appertains to make and use the same. t

This invention relates to typewriting machines and particularly to those known as silent typewriters.

It has for one of its objects to providemechanism in a machine of the above type to substantiall eliminate noise during the operation'of t e ma- Another-object is to provide mechanism designed to reduce to a minimum impact or concussion of moving parts during the operation of the machine.

Another object is to provide mechanism adapted silently toarrest the stroke of the universal bar upon which the key levers are supported.

Other objects will be in part obvious and in part pointed out hereinafter.

The invention accordingly consists in the features of construction, combinations of ement of will be exemplified in the mechanism hereinafter to be described, and the scope of the application of which will ,be indicated in the a is. illustrated Inthe accompanying drawings, wherein one of the various possible embodiments of our invention, Figure 1 is a side elevation of the same showing a key lever supported u on the universal bar. Fig. 2 is a front e evation of a portion of mechanism shown in Fi tron. elevation similar to ig. 2 but showing a key leverand, the universal bar in a de ressed position. imilar reference characters refer to similar parts throughout the several views of the drawings.

Preliminary to a description of the s ecific features of our invention and inbrder trative em parts which.

.' 1. Fig. 3' is :1

to render certain objects thereof clearer of understandin it may be here noted that, in machines oft is type wherein a silent operation in all respects is desired, it is of rime importance that the stroke of the key evers 1 be arrested without impact or concussion; In the accomplishment of thisand other advantageous results, we have found it desirable to arrange a sto in the ment of the universa bar sue that a downward stroke thereof, when one of the ke levers supported thereon is depressed, wil .be yieldingly resisted ed without impact or concussion, insuring a practically silent operation. i v The above and other advantages are secured in constructions of the nature of that hereinafter described.

Referring now to the drawings, a portion of the, frame of the machine is represented at A, and extending between the side walls thereof is a rod 1 to which the ends of key levers 2 are pivoted, as clearly shown in Fig. 1. The key levers rest upon a universal bar B, whichis sus ended by links 3 from rocker levers 4, whic are in turn suitably connected to the spacing mechanism, ribbon feeding mechanism, or other operative parts of the machine usually directly or indirectly the universal bar. In this illuswe have shown but one this illustration being operated b hodiment, levers,

of the ke deemed su cient for the complete disclosure of our invention, as it will be readily understood that the others in the set or series are of similar construction and similarly mounted.

Each of key levers 2 is connected by means of a rod 5 to its respective type bar actuatin mechanism.- A cushion 6 of suitable re at-ively resilient material extends along universal bar B and is interposed between said universal bar and levers. Universal bar B is provided wit rollers 7 in the present instance, two in number, one being arranged near either end thereof and rotatably mounted underneath said bar u on pins 8 extending transversely of depen ing lugs 9 and 10. Pivotally mounted upon spur screws 11 extending from frame are wiper cams 12, one cam beingarranged directly under each of rollers 7 with'itspivotal point in exact vertical.

th of move the entire set of key and ultimately arrest 30 points of contact upon cams 12 with their alinement with the bearing point of one of rollers 7. Springs 13 connect lugs 14 upon wiper cams 12 with fixed points upon the frame of the machine, as at 15. Each of springs 13 holds its respective wiper cam in constant engagement with one of rollers 7, as clearly shown in Fig. 2. In this figure,

the parts are'shown in their normal positions, and it will be apparent that the force exerted by springs 13 will, through wiper cams 12, tendto maintain universal bar B and the entire set of key levers supported thereon in their upward or normal position.

' Springs 16 connect each of key levers 2 with a-fixed part of the, machine as at 17 and maintain said key levers in their upward position when the universal bar is depressed.

The surfaces of rollers and cams 12 are preferably hardened to provide against wear and minimize friction.

Having thus described our invention, the

' operation thereof, which should be obvious,

is substantially as follows: When one of key levers 2 is depressed from the position shown in Figs. 1 and 2, the universal bar is forced thereby downwardly and rollers 7 rollingalong the surfaces of wiper cams 12 will force said cams downwardly against-the tension of springs 13 until the position shown in Fig. 3 is attained. In this position, the

respective rollers are upon arcs concentric to the pivotal points of said cams, and further downward movement of the universal bar is therebyprevented as will be apparent. At

this point it may be noted that, during the downward stroke of universal bar B, the

leverage applied upon cams 12 is constantly bar to its normal position upon the release.-

'ment of pressure upon the key levers or spacing mechanism. As herembefore ex plained, there is at all times a constant rolling contact between the wiper cams and the rollers carried by the universal bar.

It will of course be understood that, While we have shown and described but one roller, and its coacting wiper cam and spring, which parts are located near one end of the universal bar, the corresponding parts near the other end thereof being identical in all respects, and, therefore, a description of one group will suflice. It is also apparent that, if desired, but one roller and its co-acting cam and spring may be employed, the mechanism being arranged in any desired location intermediate the ends of the universal bar.

It will, accordingly, be seen that we have provided mechanism well adapted to achieve the objects of our invention characterized by great simplicity and efliciency. The elimination of concussion or impact between the moving parts insures a silent operation, and the rolling contact between the rollers and the wiper cams reduces friction to a minimum and insures a ready and quick response of the universal bar to the touch of the operator or to movement by the spring controlled cams when the pressure is removed from the key levers.

VVhile we have shown and described our invention as applied to atypewriting machine of the above type, we wish it to be understood that we do not intend to limit its employment to this precise relation, as the same is capable of use in a variety of relations in machines of different types.

As many changes could be madein the above construction and many apparently widely different embodiments of our invention could be made without departing from the scope thereof, we intend that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense. We desire it also to be understood that the language used in the following claims is intended. to cover all of the generlc and specific features of the invention which, as a matter of language, might be said to fall therebetween. Having thus described our invention,

what we claim as new and desire to secure by Letters Patent, is

1. In a typewriting machine, in combination, a universal bar, a member rotatably mounted upon said universal bar, a fixed part, and a member rotatably mounted upon 5 said fixed part, the rotatably mounted members upon said universal bar and said fixed part co-acting to arrest the downward stroke of said universal bar.

- 2. In a typewriting machine, in combina- 1 6 tion, a universal bar, a member rotatably mounted upon said universal bar, a fixed part, a member rotatably mounted upon saidfixed part, the rotatably mounted members upon said universal bar and said fixed 1'15 part co-acting to'arrest the downward stroke of said universal bar, and means adapted to hold said rotatably mounted members in constant engagement with each other.

- 3.111 a typewriting machine, in combination, a universal bar, a rotatably mounted member carried thereby, a fixed part, a rotatably mounted member carried by said fixed part, and means for-holding said members in constant engagement thereon, one of said members being adapted to roll over the surface of the other thereof during the stroke of the universal ba'r, said members coacting to arrest the downward movement of said universal bar.

. tion, a movable mem in contact. a

in constant engagement with said roller,

' gagement with said-,roller,-said roller upon member through the medium of said roller.

- other.

tion, a movable member, a roller carried a mounted member dependin 981,657 I v I v 4.- In a typewriting machine, the combination with a universal bar, of rotatably a mounted means carried thereby, and movable means co-acting with 881d rotatably l mounted means to arrest the downward stroke of said universal bar.

5. In a typewritin machine, in combinar, a fixed part, rotatably mounted means upon said fixed part, said rota-tabl mounted means co-acting to arrest the ownward movement of said movable member, and means adapted yieldingly to hold said rotatably mounted means 6. In a typewriting machi% in combination, a movable member, a fixed pin; a roller carried by said movable member, and a cam rotatably mounted upon said fixed in' and held in engagement with said rol er, said cam being adapted by a movement rela-' tive to said movable member to arrest the downward movement thereof.

7. In a ty writing machine, in combination, a mova ,le member, a fixed'pin, a roller carried by said movable member, a cam rotatably mounted upon said fixed pin and held said cam being adated by a movement relativeto said movab e member to arrest the downward movement thereof, and a resilient body adapted to maintain said cam and said rol er in constant engagement with each 8. In a typewriting machine, in combination, a movable member, .a roller carried thereby, a fixed'pivot, and a cam pivotally mounted upon said pivot and-held in ena movement of .said movable member. relative to said pivot being adapted to roll along said cam,'sai d 'cam'being adapted to arrest the downward movement of said movable 9. In a typewriting machine, in combinathereby, a fixed pivot, a cam ivotally mounted upon said pivot and held in im positive engagement withsaidroller, said roller upon a movement of said movable member relative to said .pivot being adapted adapted to arrest the downward movement of said-movable member through the me.- dium of said roller, and means adapted yieldingly to oppose a pivotal movement of said cam. 10. In a typewriting machine, the combination with the universal bar, of a rotatably mounted member de ending therefrom, and a wiper cam pivot beneath said member and held in resilient engagement therewith.

11.. In a typewriting machine, the combi-. nation with the-universal bar, of a rotatably therefrom, a wiper cam pivoted to a fixe portion of the frame of the machine beneath said member, and spring means for holding said member and said cam in engagemen. 12, In a typewriting machine, the combination, a universal bar having a pivot, a pivot fixed to the frame of the maehine,a

roller upon one of said pivots, a-wi r cam means for holding said wiper cam an roller in engagement.

13. The combination with a movable part of a typewriting machine, of means for arupon the other of said pivots, an sai resting the movements thereof without--impact or concussion, comprisin a fixed part, a member rotatively mounte upon each of said parts, and means'for holding said rotatively mounted members in constant engagement.

14. The combination with a movablepart of a typewriting machine, of means for arresting the movements thereof without impact or concussion, comprising afixed part, a roller mounted upon one of said parts, an

oscillatory cam member mounted upon the a other of said parts, and spring. means for maintaining a constant engagement between said roller and said cam.

,15.-.The combination with a movable part of a typewriting machine, of means for artesting the movements thereof, comprising aroller carried by the movable part, a cam' member mounted to swing uponafixed pertion of the machine, and spring means conuhember mounted to oscillate upon a fixed portion of the machine and, having a portion of its periphery struck upon an arcwhich is concentric with its axis of oscillation, said roller, being adapted to run along theperiphery of said cam'during a movement of the movable part and swingthe sam'e'until -the portion thereof which is concentric with its axis of oscillation is engaged by said roller, and spring means connected with said cam member and adapted to hold the same in constant engagement with said roller.

17. The combination with a movable part of a typewriting machine, of means for arresting movements thereof without impact or concussion, comprising a fixed part," a roller carried by one of said parts, a cam member mounted to oscillate'upon said fixed part andhaving a portio'n of its peripher struck 'upon' an are which is-concentric wit its axis of oscillation,- said roller during a movement of said movable part being adapt ed to run'along the, periphery of said cam member until it is brought into engagement with the portion of said cam member-, which is concentric with its axis 'of oscillation, whereupon the movement of said movable part Wlll be arres ted,;and a spring con-' necte'd with saidcam member and operating to hold the periphery thereoffin constant engagement with said roller; H 18. 'In a .typewriting machine, the combination with the universal bar and the key levers which rest upon said universal bar, of

meansfor arresting the downward move ments of the key levers without impact or concussion, comprising a roller journaled upon the universal bar, a cam member mounted to oscillate upon a fixed portion of -the framing of the machine, said cam member having a portion of its periphery struck 5 upon an are which is concentric with its axis of oscillation, said roller during a de- 'szud cam member and to assist in the returnwhen the same has been depressed.

In testimony whereof'we aflix our signa- 3G tures, in the presence of twowitnesses. I WELLINGTON ,P. KIDDER.

CHARLES W. SPONSEL. Witnesses: l

J Unrus L. BALDW N, HELEN, M. SEAimNs.

ing of the universal bar to normal position

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