US521616A - Type-writing machine - Google Patents

Description

(No Mod'el.)

J H HUDSON TYPE WRITING MAGHINE.

No. 521,616., Pratented Juney 19, 1894.

W/TNE SSE S.'

A TTUHNEY.

UN/ITED STATES PATENT GFFICH..

JOHN HORAOE HUDSON, OF MARSHALL, TEXAS.

TYPE-*WRITING MACHINE.

SPECIFICATION forming part of Letters Patent No. 521,616, dated June 19, 1894. Applicationledranuay 31,1894.. Sel-n.1 No. 498.576. (Nomad.)

To all whom t may concern:

Be it known that I, JOHN I-IORAOE HUDSON, of Marshall, in the county of Harrison and State of Texas, have invented certain new and useful Improvements in Variable Line- Spacers for Type-Writers; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being had tothe accompanying drawings, and to the letters of reference marked thereon, which form part of this specification.

This invention relates to certain improvements in typewriters and more particularly to improvements in variable line spacers for typewriters. Y

,The Object of the invention is to provide an improved line spacer for typewriters exceedingly simple and durable in construction, and composed of a minimum number of parts and whereby the operator is enabled to adj ust the Spacer so that the lines of typewriting can be located any desired distance apart, vand the spacer can be advantageously adjusted so as to write upon variously ruled paper.

The invention consists in certain novel features of construction and in combinations of parts more fully described hereinafter and particularly pointed out in the claims.

Referring to the accompanying drawings, Figure l is an end view of a typewriter carriage provided with my invention. Fig. 2 is a vertical sectional view through a portion of the typewriter carriage and platen. Fig. 3 iS a detail under plan view of a portion of the carriage andl platen. Figs. 4 and 5, are respectively, a detail side and end view of the locking lever or cam. Fig. 6, is a detail view.

Referring to the drawings, a, indicates the frame of thecarriage.

b, is the rotary platen roll suitably journaled in the carriage to rotate.

c, is the ordinary'spacing lever, in the present instance shown mounted on the front bar of the carriage and provided with the upwardly extended arm ol.

e, is the rigid stop limiting the downward movement of the spacing lever.

f, is the vertically adjustable stop by which the upward swing of the spacing lever can be varied. The stop is here shown as consisting of the vertical adjusting screw extending down through a certain portion of the frame above the spacing lever and provided with a suitable lock nut and milled head, so that the screw can be easily turned and can be locked in the desired position.

g, indicates a metallic head inserted in one end of the platen, preferably the right hand end. This head has an .end formed to enter the end of the roller and has the annular flange provided with screwholes by means of which the head can be secured against rotation by screws passing through said iange and entering the edge of the roller at its outer end and at the exterior of the platen. This head is provided'with the tread h. This head can also have the projecting hub to receive the axle on which the roller turns.

j, indicates a vertically disposed rocking frame or plate between its ends mounted to rock on the same axis as the platen, preferably by being loosely mounted on the projecting hub of the said head or on the journal ofthe platen, so that the upper end of said plate projects above the tread of the head, and the lower endy projects below the lower surface of the platen. The lower end of this plate is provided with a pointer or iinger l, extending beneath the platen to one side of the scale plate m. The parts being so arranged that this pointer is located on one end of the line on which the characters are printed, and so that it moves the distance between the lines. The upper end of this plate extends over the friction tread of said head and is formed hollow and the cam n, is fulcrumed therein between the same so that the upper end of this locking lever or cam n is pivotally joined to the upwardly extending spacing lever by means of alink o, as shown. The lower end of this locking lever or cam is preferably rounded, the parts being so arranged that when th-e spacing lever is moved upwardly the extended end thereof and the link will throw the lower biting edge of the pawl into engagement with the tread of the platen head, and the continuing forward movement of said link and spacing lever will rookthe camv and head together so that the platen is moved around until the spacing lever strikes the adjusting screw forming the limit of upward movement thereof, when the parts are returned to their normal position by the spring p, secured to the carriage frame and to the upper end of the swinging plate or frame carrying the locking lever or cam and tending to pull the upper end forwardly or toward the front side of the carriage with the cam out of engagement with said tread. The rocking plate and cam are provided with upward extensions q, o", so arranged that when they are pressed together by the finger the engaging end of the cam or locking lever will be left from the tread whereby the platen can be moved back when desired. The edges of the hollow head in which the cam is located form stops to limit the movement thereof independent of the plate.

,indicates an alm pivoted preferably to the rear bar of the carriage, and extending npwardly and provided with the brake block u engaging the tread of the platen head and held yieldingly thereon by means of the spring fu secured to the carriage and to the free end of said arm, whereby the platen is held to the proper movement and against moving beyond the point desired. The biting face of the cam is preferably milled and if desired the face of the tread can be milled, or both of these surfaces can be smooth, or the surface of the tread milled and the cam smooth.

It will be observed that the pointer on the under side of the platen travels the Same distance as the platen at every meeting stroke of the feeding mechanism, so that the operator by means of the thumb screw and the platen moving mechanism can accurately adjust the parts so as to make the lines the desired distance apart by observing the distance that the pointer travels. It will be observed that as the link moves forward with the spacing levers to their normal positions the cam is automatically released from biting engagement with the tread, of the platen head, and when the spacing lever is lifted the link is forced rearwardly, and thereby forces the cam into biting engagement with said tread.

It is evident that various changes might be made in the forms, constructions and arrangements of the parts described without departing from the spirit and scope of my inven tion, hence I do not wish to limit myself to the exact construction herein set forth, but consider myself entitled to all such changes as fall within the spirit and scope of my invention.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent of the United States, is

l. A type writer spacing mechanism eomprising the platen having a circular tread at one end, a rocking frame, the locking lever or cam fulcrumed in said frame and arranged to engage said tread and move the platen forward and a spacing lever pivotally connected to said cam and arranged to positively operate the same, substantially as set forth.

2. In a typewriter, the platen having a metal tread, a swinging plate havin ga pointer at the side of the platen carrying the paper, a locking lever or cam carried by said plate and arranged to engage said tread and move the platen, and a spacing lever positively connected with said cam to operate the same, as set forth.

3. In a typewriter, the combination of the platen having a metallic tread at one end, a rocking frame at said endof the platen at one end having a pointer extended laterally over the face of the platen, the locking lever or cam fulcrumed in said frame so that its biting edge moves int-o and out of engage ment with the tread, the spacing lever and a link connecting the spacing lever and said cam to operate the parts, as set forth.

4. In a type writer the combination of the platen having an end head provided with the circular tread, a rocking plate between its ends fulcrumed at the end ofthe platen and having the pointer at one end, and the hollow head at the opposite end, the locking lever fulcrumed in said head over said tread to bite the same, the vertically rocking spacing lever' havingthe end extended and connected by a link with said cam to rock the same and the plate, and a variable stop limiting the swing of said parts to move the platen around, substantially as described.

5. A type writer havinga rocking frame at one end of the platen provided with a pointer to move over the face of the platen and with a rocking cam therein arranged to engage an edge or tread of the platen and turn the same, a variable stop limiting the feeding throw of the parts and means substantially as described, connected to said cam to rock the same and said frame, substantially as set forth.

6. In a type writer, the combination of the platen, the frame, the rocking plate fulcrumed at the end thereof, and having a pointer, the rocking cam in said plate over and arranged to engage a tread of said platen, said cam and plate having extended ends whereby the cam can be disengaged from the tread, the spacing lever fulcrumed on the frame and connected to said cam to operate the same,aver tically adjustable screw in the frame to limit the upward movement of the Vspacing lever, and a spring to yieldingly hold the parts in their normal position, substantially as described.

In testimony that I claim the foregoing as my own I aiix my signature in presence of two witnesses.

J. HORACE HUDSON.

Witnesses:

F. G. MCCowN, W. R. JENNINGS.

IOO

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