US442409A - George w - Google Patents

Description

(No Model.)

G. W. N. YOST & G. E. MEBRITT.

TYPE WRITING MACHINE.

Patented Dec. 9, 1890.

@V w MM Uivrrn STATES PATENT ()rrrcn.

GEORGE IV. N. YOST, OF NElV YORK, N. Y., AND CHARLES E. MERRITT, OF

SPRINGFIELD, MASSACHUSETTS, ASSIGNORS TO THE YOST IVRITING MA- CHINE COMPANY, OF NEW YORK, N. Y.

TYPE-WRITING MACHINE.

SPECIFICATION forming part of Letters Patent No. 442,409, dated December 9, 1890.

Application filed May 16, 1837. Serial No. 238,364. (No model.)

To all w om i may C ce n: is attached the feed-racks G G 110w com- Be it known that we, GEORGE XV. YosT, monly in use. A stud H projects backwardly of New York city, in the county of New York from the inner rack G and has pivoted to it and State of New York, and CHARLES E. one end of a connecting-link I, the other end 5 )IERRITT, of Springfield, in the county of of which is jointed to the upper portion of a Hampden and State of Massachusetts, citizens spring-actuated driving-arm J, all in the of the United States, have invented certain usual manner.

new and useful Improvements in Type-YVrit- 2 2 represent standards or supports for the mg Machines, of which the following is a ends of a rock-shaft 3, which carries a feed IO specification. pawl or dog 4, that engages with the teeth on Ourinvention in type-writing machines has the racks G and G and operates to permit a special reference, first, to the rock-shaft with movement of the carriage to the left of the which the feed-dog is connected, and, seemachineonlyoneletter-space at a time. The

ondly, to the release-key by which the feedrock-shaft is preferably composed of three 15 dog is disengaged from the carriage to perportions a, b, and c, the part a being a solid mit a rapid movement of the latter toward rod, the part Z) a hollow rod or tube, and the y the left of the machine; and our invention, partcaslotted frame orhonsingwith threaded having for its main objects to simplify and ends to receive the inner threaded ends of the cheapen the machine, consists in the features portions a and I). From the lower side of the 20 of construction and combinations of parts housingc depend brackets or lugs 5,in which hereinafter more fully described, and particuthe feed-dog 4 is pivoted to vibrate in the slot larly pointed out in the claims. 6, and from the rear side of the housing ex- In the accompanying drawings, Figure 1. is tends an arm 7, to which is coupled the upper a perspective view, looking from the rear, of end of a rod or link 8, whose lower end is 25 the upper portion of a type-writing machine connected to the universal bar, which is embodying our several improvements, various not shown. The latter maybe f any desired 7 parts usually employed therein, but immateconstruction and may be arranged as heretorial to our invention, being omitted in order fore or as shown in a separate application not to complicate the drawings. Fig. 2 1s a filed by us Collars (Z (Z, secured to the 0 rear elevation of the rock-shaft, the supports rocker-arm, prevent any cndwise movements therefor, the feed-dog, and the release-key. thereof. Fig. 3 is a vertical longitudinal section taken The release-key is designated by the numercentrally through the parts illustrated at Fig. al 9, and consists of a rod or shank and a but- 2; and Fig. 4 an enlarged vertical crosston-head screwed upon its outer end. The

5 section taken at the line so a", Fig. 2, with the rod orshank is passed through and supported feed-racks added. within the hollow part b of the rocker-arm In the several views the same part will be and is provided with means at its inner end found designated by the same letter or nuto act as a stop to outward movement. lVe meral of reference. preferably form the shank with an enlarge- 0 AA A A are posts or pillars forming part ment or head 6; but a pin or cross-piece or of the frame-work of the machine and supother device would serve as'well. At the opporting the type-circle or top plate B, upon posite end of the slot is arranged a spiral which are mounted the usual type bars or lespring 10, which bears against the face of the vers, purposely omitted. feed dog. This spring is provided for the 5 0 represents the paper-platen or imprespurpose of keeping the dog in a vertical posion-cylinder, which is journaled to rotate in sition during the oscillations ofthe rocker the carriage-frame D. A yoke E, secured to arm and for the purpose of returning the dog the carriage-frame. extends rearwardly and and the release-key to their normal positions slides upon the guide-rails F F. To this yoke after the actuation of the latter; but so far 'from the teetlrot' the outer rack 3r into engagement with the teeth of the inner rack G, at which time the; outer rack, by means of a spring, is shot forward one tooth. At each release of the key-levers the rock-shaft tilts in the opposite direction and the dog is vibrated backwardly and re-engagedwith the teeth of the outer'rack. Duringthis movement of the dog the driving-arm moves the carriage and its appendages a letter-space or one tooth tc'the left of the machine. The feed-racks and the driving mechanlsm herein shown, it will be seen, are similar to those now in common use, both in construction and mode of operation, and no extended descrip-. tion thereof appears to be necessary in this specification. When the carriage shall have arrived at the extreme left of the machine, the roller may be turned to obtain an unprinted portion of the paper and the whole moved rapidly back to the right-hand ex, tremity of the machine to recoinmence the operation of printing. During this return of thecarriage the teeth of the outer rack slide freely over the dog owing to their inclination and the capability of the dog to vibrate within the slot.

The release-key, it will be understood, is used for the purpose of disengaging the dog from the racks and permitting the carriage to travel quickly to the left. In order to effect this disengagement in the machine herein shown, it is simply necessary to push inwardly the release-key, which abuts against the back of the pawl above its fulcrum, and: the latter is vibrated downwardly, as indicated at Fig. 3 by the dotted lines. Just previous to pushing in the release-key, however, the carriage should be moved slightly to the right to permit the point of the dog to clear the tooth with which it is in engagement. When the carriage shall have been thus driven to the desired position, the operator may remove the pressure upon the releasekey, whereupon the spring 10 will act to right the dog and re-engage it with the racks and at the same time push the release-key out to its normal position.

By locating the rocker-arm above the typecircle instead of below, as heretofore in machines of this class, we are enabled to use the "entire type-circle and get a greater number .of type-bars thereupon, besides avoiding the bending of the two connecting-rods between which the rocker-arm passedin the prior construction of machine.

' By arranging the release-key in the manner shown we are enabled to dispense with the special supports therefor as formerly and improve the appearance of the machine, and

by the employment of the spring 10 to keep the pawl upright and return it and the release-key the pawl may be made much smaller and lighter than in the former machines.

What we claim as new, and desire to secure by Letters Patent, is V 1. In atype-Writing-machine, the combination, with the carriage and the feed-racks, of a rock-shaft having a slotted housing, a dog pivoted to vibrate Within the slot of said housing, and a spring for keeping said dog in a vertical position, as set forth.

2. In a type-writing machine, the combination, with the carriage and the feed-racks, of a rock-shaft composed of the threaded rods a and b and the intermediate slotted housing having threaded ends, the dog pivoted to vibrate within the slot of said housing, and the spring adapted to keep said dog in a vertical position, as set forth.

3. Ina type-writingmachine, the combination, with the carriage and the feed-racks, of the roek-shaft having a hollow or tubular portion, the feed-dog mounted upon said shaft, and the release-key supported and contained within said hollow or tubular portion ofthe rocker-arm, substantially as set forth.

at. In a type-writing machine, the combination, withthe carriage and thefeed-racks, of v the rock-shaft having a hollow or tubular portion, the feed-dog, the release-key, and the spring, substantially as set't'orth.

5. In a type-writing machine, the combination, with the carriage and the feed-racks, of

a housing capable of an oscillatory motion onlyand provided with. a longitudinal slot, a dog pivoted to said housingand within the slot thereof, and a spring to keep said dog normally in a vertical position, as set forth.

7 6. In a type-writing machine, the combination, with a carriage having feed racks, of a longitudinaIly-slottedhousing mounted above the type-ring and capable of an oscillatory motion only, a dog pivoted to said housing and within said slot, and a release-key engaging with said dog to vibrate the same in said slot, as set forth.

Signed at Springfield, in the county of Hampden and State of Massachusetts, this 14th day Of April, A. D. 1887.

G. V. N. YOS'D.

Witnesses:

EDWIN F. LYFORD,

O, J. CHANDLER.

C. E. MERRITT.

Images