US1098057A - Type-writing machine. - Google Patents

Description

M. B. SARGENT ks; A. E. KARLBERG.

' TYPE WRITING MACHINE. APPLICATION FILED SEPT. 9, 1913.

Patentgda 26, 1914.

I INVENTORS 7% l3 q/ W Allnrnr UNITED STATES PATENT oFrIcE.

MARSHAL B. sanennr AND Aavxn E. mnrnm, or OWENSBORO, KE TUCKY.

. TYPE-WRTTING MACHINE.

Specification of Letters Patent.

Patented May 26, 1914.

Application filed September 9,1913. Serial No. 788,900.

To all whom it may concern Be it known that we, MARSHALL B. SAR

ennr and Anvm E. KAnLBnRe, of ()wensboro in the county of Daviess and State of Kentucky, have invented certain new and useful Improvements in Type-Writing Machines;

use the same.

This invention relates to improvements in typcwriting machines and more particularly to paper feeding mechanism therefor,-the

object ofthe invention to provide simple and eiiicicnt means especially adaptable for use with a stenographic writing machine, for accurately moving the paper step-bystep for line feeding during successive manipulations of the key levers. \Vith this object in'view, the invention consists in certain novel features of construction and combinations of parts as hereinafter set forth and pointed out in the claims.

In the accompanying drawings, Figure 1 is a sectional view of a stenographic typewriting machine showing an embodimentof .our invention. Fig. 2 is a perspective view of a portion of the machine showingthe paper feeding devices and their cooperative relation to other parts, and Figs. 3 and 4 are detail views.

1 represents the frame of the machine, wherein is pivotally mounted a plurality. of key-levers 2 provided respectively with keys or buttons 3 and with upwardly projecting rms t. A slotted type bar or comb 5 is disposed'transvcrsely in the upper portion of the framework and in this slotted comb, type bars-G arepivotally supported between their ends and each provided at its upper end with a type 7 ,-the lower ends of said type bars beingpivotally connected with the upper ends of the key-lever arms 4. The top of the casing is made with an opening 8, over the back end of which a yoke 9 is located,

said yoke being provided at its ends with vertically disposed, forwardly projecting arms 10 located at respective sides of the opening 8 in the casing top, andfrom these arms], lateral arms 11 project under the top of the frame or casing 1, to which latter they are rigidly secured.

To the forward yoke 9,. links 12 are hinged and aresupported" at their forward ends by the frame or ends of the arms 10 ofcasing 1. A platen bar 13 (provided with a ylelding strip or platen let) is disposed be-- tween and supported by the forward ends of the links 12,-said platen bar being thus located transversely over the central portion 1 of the framework directly in line with the typeand an inking ribbon and a paper strip are caused to pass between said type and the platen. The paper strip 15 is si'pplied from a roll 16 and, after passing in front of the platen, is passed over a. roller 17 mounted between posts 17 rising from the ends of the platen frame. From the roller 17 the paper strip is passed downwardly and in front of a tension roller 17 b disposed below the roller 17. The journals ofthe roller 17 b are mounted in horizontal slots 17 in the posts 17 ,and springs 17f bearing against said journals serve to press the tension roller forwardly against the paper. From the tension roller, the paper strip passes to the paper feed mechanism, which will be hereinafter described in detail. The spring-pressed roller 17 serves to keep the paper strip taut in front of the'feed devices, and insures the regular and even spacing movements of the looseportion of the strip which passes in front of the platen and over the upper roller 17, eachtime a key is struck.

A hollow rock-shaft 18 is pivotally mounted upon a stationary or'center shaft between the forwardly projecting arms 10 of the yoke 9. This rock-shaft is provided at its ends with upwardly projecting rigid arms 19 having bosses 20 at their upper ends, to which are secured, horizontally disposed screws or mountings 20 for spriugpressed feed fingers 21. These fingers depend from their mountings and are slightly inclined, their lower ends being provided with biting edges .22 which normally rest (when no paper is in the machine) upon the slightly curved up er surfaces 23 of lugs 24: formed or made rigld with the shaft 18 alongside the arms 19. The paper strip passes over the surfaces 23 and under the biting ends of the fingers 21, so that when the shaft 18 is rocked in a direction to cause the arms 19 to move backwardly, the paper will be gripped between said-fingers and the surfaces of the' finger 25 having a biting lower end disposed over a lug 26,said finger being slightly inclined and cooperating with the upper surface of thelug 26 in a manner to grip the paper. The spring-actuated finger 25 is mounted between ears 27 projecting forwardly and upwardly from the central portion .of the yoke 9, and the lug 26 projects forwardly from a plate 28 secured under the horizontal portion of the yoke 9,

A. recess is formed in the under face of the yoke 9 and in this recess a plate 29'is secured in a manner to be spaced slightly above the plate 28,-said plates thus constituting guides for the paper strip as the latter emerges from the feeding devices. The rear edge of the-upper plate 29 is serrated to provide a severing means for the paper strip. 1

A universal bar 30 is pivotally suspended in the framework in position to be engaged by the upwardly projecting arms l of thet key-levers and is maintained normally in and returned to its normal position by means of spring 31. An arm 32 projects rearwardly from the frame of the universal bar and is connected, by means of a link 33 with an arm 34. depending from the rockshaft 18 of the paper feed devices,said link being pivotally connectedat itsrespective ends to the arms 32 and 34:.

From the construction and arrangement of parts above described, it will be seen that each manipulation of a key or keys to effeet the printing operationof the type, motion will be imparted through the universal bar and its connections with the rock-shaft l8, to rock said shaft and cause the paper to be fed as above described, the distance of movement of the paper at each operation being that which is suitable for line spacing. During the return movement of the key-lever and universalbar, the rock-shaft 18 will also return to its normal position, the feed fingers 21 riding freely over the paper while the latter is held against retrograde movement by the gripping action. of" the finger 25 over the lug 26.

Our improvements are quite simple in construction, but they have been found to be very effectual in operation, insuring. accurate movement of the paper strip without liability of slipping or danger of tearing the paper.

Slight changes might be made in thedetails of construction, ofour invention without departing from the spirit thereof or limiting its scope and hence we do not wish to restrict ourselves to the precise details herein set forth.

Having claim as new and desire to secure by Letters-Patent is: v

1. A paper feed mechanism comprising a rock-shaft, spring actuated fingers carried fully described. our invention what by and movable with said shaft, said shaft also provided with means movable therewith and cooperative with said fingers to grip a paper strip and move it when said shaft is rocked in one direction, and means mounted on a fixed support for gripping the paper strip to prevent retrograde movement thereof during the return of the feed fingers.

2. Paper feed mechanism, comprising a rock-shaft, spring-actuated feed fingers carried by and movable with said rock-shaft, means also movable with said rock-shaft and cooperative with said fingers to grip the paper and nioveit when the shaft is rocked in one direction, a spring-actuated finger supported independently of said shaft, and means also independent of said shaft and cooperative with said last-mentioned finger to grip. the paper andprevent retrograde movement thereof during the return movement of the rock-shaft and feed devices carried thereby.

3. In a typewriting machine, the combination with framework, of a rock shaft, spring-pressed feeding fingers carried by the re ck shaft and cooperating with a fixed part of said rock shaft and movable with the lat er, a paper gripping finger carried by the framework, and a part rigid with the frame-work under said last-mentioned finger to cooperate with the latter to prevent retrograde movement of the paper when the rockshaft and feeding fingers move forwardly.

' 4C. In a typewriting machine, the combination with framework, of a rock-shaft, paper gripping and feeding means carried by said rockshaft, a yoke rigid with the framework, a lug projecting forwardly from said yoke, a spring-actuated gripping finger mounted on the yoke and having its free end disposed over said lug to cooperate therewith and constitute paper gripping .means to prevent retrograde movement of the paper,

5. In atypewriting machine, the combination with framework, of a rook-shaft, paper gripping and feeding means carried by and movable with said rock-shaft, a yoke rigid with the frame-work, a plate secured to and having a part spaced from the lower face of said yoke, a lug projecting forwardly from said plate, and a spring-actuated finy ger mounted on the yoke over said lug and oooperative with the latter to constitute a paper grip to prevent retrograde movement of the paper.

6-. In a. typewriting machine, the combination with keydevcrs, and a universal bar operable by saidkey-levers, of a rock-shaft, paper-[gripping and feeding means carried by and positively movable in both directions with said rock-shaft, connections between said universal bar and rock-shaft'for imparting rocking movement to the latter and the paper gripping and feeding means carare manipulated for effecting line. spacing,

and paper gripping devices: on the framework and operable independently of said" rock shaft and the paper gripping and feed .ing means for preventing retrogrnde movement ofthe paiper durlng return movement- ]of the ifeedlng means.

7. In e' typewriting machine, the combinatio'nwith a platen, paper guiding" means,

paper feeding means in rear of said guiding means,- and means :cor operating the feeding means, of a tension roller mounted on the framework .below said guiding means and independently of the feeding means, said tension roller having journals, horizontal elongated hearings in the framework for said journals and springs bearing against said journals and tending to press the tan sio'n roller against the paper independentlf 20 of end inopposition to the operation of the feeding means.

In testimony whereof, We have signed this speeifioation in the presence of two subscribing witnesses.

- 'MARSHALL B. SARGENT.

ARVID E. KARLBERG.

Witnesses:

, J. M. MATTINGLY,

A. R. GRIFFITH.

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