US334693A - John f - Google Patents

Description

(No Model.) l

J. F. DAWSON.

TYPE WRITING MACHINE. No. 334,693. I Patented Jan. 19, 1886.

N. PETERS. Plwm-Lnhugnpher. wasnmgwn. D. C.

-"Nrrnio STATES JOHl\Tv F. DAVSON, OF NEW' YORK, N. Y., ASSIGNOR TO LEE S. BUBRIDGE,

i O F SAME PLACE;

TYPE-WRITING MACHINE.

'LEC-ICATION ormng part of Letters Patent No. 334,693, dated January 19, 1886.

Application tiled April 24. 1855.

To all whom it may concern:

Be it known that I, JOHN F. DAWsoN, a citizen of the United States, and a resident of New York, in the county and State of New York, have invented certain new and useful Improvements in Typeiriting Machines, of which the following is a specieation.

The object of my invention is to provide a type writing machine of a simplified and i1nproved construction, whereby the paper may be carried upon a longitudinallymovable supy port parallelwith a stationary letter-plate and a stationary type-plate, so as to bring the paper itself into alignment and press it against the stationary type.

The invention will be hereinafter described, and specifically pointed out in the claims, reference being had to the accompanying drawings,l in whichl Figure l represents a plan View of my i1nproved type-writing machine, with parts there` of broken outv to show the construction. Fig. 2 is a front elevationV of the same, as seen in the direction of arrow l of Fig. 1. Fig. 8 is a crosssection of the same, taken on the line x :c of Fig. 1, and seen in direction of arrow 2. Fig. v4 is a detail front view of the same, showing the relative-positions of the type-plate, ink-ribbon, paper, andimpression point ofthe stylus. 'Fig 5 is a detail front view of the device for feeding the paper the distance between two adjacent letters by the upward movement of the handle end of the stylus, the same being drawn on a larger scale than in the other figures.

A is the base or bed plate of the mach-ine, and is provided with ways a, upon which is arranged to slide t-he paper-carrying support or frame H.

To the front of the bed-plate A are secured rearward overhanging arms or brackets B, between which are attached in front and rear of the machine, respectively, the letter-plate C and the type-plate D. The plateD has the type arranged upon its under side in proximity to the slide-frame H, but leaving space for the latter to move freely, and at the end of the overhanging arms B, erosswise to the type-plate, are arranged to revolve in suitable bearings the rollers provided with thumbknobs wherewith to turn them, and to which rollers are attached the ends of the ink-tape Serial No. 163,271. (No model.)

E, which, when stretched by the rollers e, lies in close proximity to the typesurface,as shown in Fig. 4. The letter-plate C is provided opposite to each letter or gure thereon with a notch, c. through which the pointf of the stylus F passes when depressed to imprint the letter opposite to the notch, and by which the stylus is guided on the descent, so as to bring its impressionpoint exactly in proper juxtaposition to' the corresponding letter on the typeplate.

The rear edge of the paper frame H is guided in ways as aforesaid; but in order to lessen the friction of the slide movement the front edge has a lug to which `is pivoted a roller, k, which supports that edge of the frame upon the front surface of the base A.

Between end bearings upon the paper-frame H is pivoted parallel with the type-plate a rubber-covered roller, I, which is depressed upon the flat surface of the frame H by end springs,z', and is provided with a hand-knob, by which to turn the roller, and thereby to move the paper J (which is introduced transversely to the type-plate D between the roller I and the underlying surface of the frame H, underneath the ink-tape E) the desired distance between one complete line and the next following. Upon the frame H is secured a rearward-curved and open plate.j,in which the paper, rolled up, is introduced, so as not to occupy any further space toward the front than as limited by the said curved plate. After printing one line the paper is moved by the roller I away from the operator the space for t-he next line, and the letters being visible on the upper surface of the paper, the operator, while printing one line, can always read before him the lines previously printed.

Between the end brackets, upon the slideframe H, is secured a rod, h, upon which, by means of a bored hub, the stylus F is fitted to oscillate and slide, and above and parallel with the said rod h is also similarly secured a bar, h', or rack having ratchet-teeth upon its under side.

l Vhen the stylus F, pivoted as aforesaid, is depressed by its handle end into the position shown in dotted lines in Fig. 3, its point f passes through one of the aforesaid notches opposite the letter to he printed, and its rear end, f', which is dat upon its upper surface, rises by the depression and presses the paper J from the under side up against the corresponding letter on the under side of the type-plate D and (the ink-tape being interposed between the paper and type) imparts a legible impression. On withdrawing the pressure a spring, K, (which is coiled,so as to allow of sufcicnt length and proper elasticity, and which is secured with its forward end to the stylus, and thence is bent over and bears against the stylus-hub, and with its rear end bears against the under side of the frame H,) returns the stylus F into its normal position, or that shown in full lines in Fig. 3.

G is a pawl arranged underneath and parallel with the rack h. This pawl is pivoted between lugs b upon the stylus, and it has two teeth, g g', the former tooth being inclined upon its face, as shown in Figs. 1 and 5, so as to act partly as a wedge in entering the ratchetteeth of the rack when the stylus rises, and thus assist in producing lateral feed movement. The pawl G has a handle or weight at n, which drops when the stylus is depressed, thereby getting the pawl G in an inclined position, which causes the feed-point g to swing toward the right a distance proportioned to the desired distance between two adjacent letters.

Vhen the stylus ascends, the point g of the pawl G engages the next tooth ofthe rack h', and in resuming the position shown in Fig. 5 feeds the rack, and thereby the frame H and paper J, the corresponding distance toward the left. In resuming the said position of Fig. 5 the other tooth, g', of the pawl G also enters between two teeth of the rack, thus locking the pawl G,and thereby the stylus F, temporarily to the rack h, so that when the stylus is moved laterally to bring the paper into alignment it is rigid with the frame H, but when depressed sufliciently to allow of moving the pawl G entirely out of contact with the teeth of the rack h it may be freely slid upon the rod h, as when required to start printing a new line.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. In a type-writer, and in combination with the type thereof, a movable paper-car rying support, and a stylus on said support acting as a handle to bring the impressionpoint ofthe paper into alignment with the type whose impression is to be given.

2. In a type-writer, the combination, with a longitudinally-immovable type-plate and letter-plate, and with a paper-carrying ysupport movable parallel with the said plates, of a stylus mounted upon the said support to bring the impression -point of the paper opposite to the letter to be printed, said stylus being also depressible to cause the impression, and said support moving laterally, by the rising ot' the stylus after each impression, a distance corresponding to the space between two adjacent letters.

3. ln a type-writer, the combination, with the stationary letter-plate C, arranged in the front of the base-plate and having a notch, c, opposite each letter, and with the stationary type-plate D, having the type on its under side, and arranged at the rear of the baseplate, and with the paper-carrying frame H, arranged to slide upon the base A underneath and parallel with the type-plate, of the stylus F, fulcrumed upon the said sliding frame H, and provided at its handle end with the point fto guide it through the notches c, and at its opposite end with the ilat impression-surface f', which, on depressing the handle, rises and presses the paper against the type, substantial] y as hereinbefore set forth.

4. Ina typewriter, the combination of the base A, provided with the stationary letterplate C and type-plate D, substantially as described, the paper-carrying sliding frame H, provided longitudinally with the rod h and rack L, the stylus F, fulcrunied and slidable npon the said rod h, and provided willi the spring K, and the pointsff to work in connection with the said plates C D, respectively, and the feed-pawl G,pivoted to the said stylus and provided with the teeth gg,to engage the teeth of the rackh, all substantially as and for the purpose set forth.

In testimony that I claim the foregoing as my invention I have signed my name, in presence of two witnesses, this 22d day of April, 1885.

JOHINT F. DAWSON.

Witnesses:

W. KNAPP, LEE S. BURRIDGE.

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