US499717A

US499717A - Frederick l

Info

Publication number: US499717A
Authority: US
Publication date: 1893-06-20
Anticipated expiration: 1910-06-20

Description

(No Model.)

F. L. GRASS. TYPE WRITING MACHINE.

N0.499,717. Patented/June 20,1893.

NITED STATES PATENT OFFICE.

FREDERICK L. CRASS, OF ITHACA, NEIV YORK, ASSIGNOR TO THE ITHACA GUN CO., OF SAME PLACE.

TYPE-WRITING MACHINE.

SPECIFICATION forming part of Letters Patent No. 499,717, dated June 20, 1893. Application tiled February l., 1893 Serial No. 460,511. (No model.)

To all whom it may concern:

Be it known that I, FREDERICK L. CRAss, a citizen of the United States, residing at Ithaca, in the county of Tompkins and State of New York, have invented certain new and useful Improvements in Type-VVritin g Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the to art to which it appertains to make and use the same.

The invention relates to that part of the mechanism of typewriting machines by means of which the paper-carrying cylinder is roi5 tated one or more notches at a time for the purpose of changing the lines upon which the writing is to be made, and its object is to provide simple and effective means for rotating the cylinder by a movement in the same direczo tion and from the same handle as that used in returning the carriage at the end of each line, and at the same time leaving the cylinder entirely disengaged from the revolving mechanism whenever the latter is not in the z5 act of revolving it, so that the cylinder may be swung up forward for examination of the work, and so that it may be removed from the carriage without the necessity of first disengaging the revolving mechanism.

3o To this end my invention consists in the construction and combination of parts forming a portion of a typewriting machine hereinafter described and claimed, reference being had to the accompanying drawings, in which- Figure I, is a top or plan view of a portion of the right-hand end of a typewriting machine carriage showing my invention with the parts in their normal positions. Fig. II, is an end view of the same. Fig. III, is a detail top 4o view showing some of the parts separated.

5 represents the carriage.

6 is the paper-holding cylinder mounted to revolve in a frame 7 Vwhich is provided with trunnions Speccentric to the cylinder, whereby the frame is hung in open Y bearings 9. The

cylinder hangs normally below these trunnions while in service and by swinging it upward and forward the line upon which the writing is being done may be examined, and

5c by swinging it a little farther upward the frame is set free so that it may be lifted with the cylinder out from the bearings 9. The cylinder is provided with a ratchet-wheel 10 having teeth around its circumference and upon its ends equal in number and spacing. l1 is a detent provided with a hook l2 to engage the circumferential teeth and with a spring 13 which constantly actuates it into engagement with the teeth and holds the cylinder at any line to which it may be revolved. 6o The detent is pivotcd in the frame 7 at 14 and is provided with a thumb-latch l5 whereby it may be raised out of engagement whenever it should become necessary to revolve the cylinder backward, but the cylinder may be revolved forward by applying a little force against the action of the detent.

16 is a revolver having a cylindrical body 17 journaled in the carriage 5 exactly or nearly concentric with the cylinder 6 when the lat- 7o ter is in its normal position. The revolver has an arm 1S, provided with a deep socket 19, in which the pawl 2O is fitted to slide endwise in a line parallel with the journal 17, and the pawl is impelled outward to its limit of motion in the socket 19 by a spring 2l.

The revolver is provided with a stud 22 upon which there may be an anti-friction roller 23 to engage the spiral slot 24, whose sides Serve as a cam, causing the revolver to 8o rotate upon its axis whenever it slides longitudinally in its bearing.

25 is a spring acting tangentially upon the revolver relatively to its axis of motion to return the revolver to its normal position. By rotating it backward it is also slid backward in the cam. The pawl is shaped at its end with a iiat forward side to engage the rear side of every end tooth of the cylinder, and upon its rear side it is slanted to slide freely 9o backward over the front sides of the teeth. The pawl slides endwise when passing backward over each tooth.

26 is a lever pivoted at 27 upon the carriage and fitted at one end to engage a shoulder or head 28 on the revolver 16.

The operation is as follows: The operator takes hold of the handle 29 of the lever and moves it to the right, that is in the direction to return the carriage and the movement beloo ing continued after the carriage vreaches its stop turns the lever upon its pivot toward the right and slides the revolver toward the left, causing the pawl 20 to engage with the teeth of the ratchet-wheel 10, and as the revolver continues to slide it is rotated by the slot cam 24 in the direction to revolve the cylinder forward.

30 is a stop gage, pivoted at 31 to the carriage, and provided with two

shoulders

32 and 33, either of which may by rotation be located inthe path of the lever 36 to limit the motion of the lever so that it will revolve the cylinder either one or two linesv at each stroke, as may be required. The revolver being journaled to revolve concentrically with the cylinder, carries its pawl 2O exactly in the same circle of revolution as the cylinder so that whether the pawl be moving either forward or backward there is the least possible friction between it and the ratchet-wheel; and the normal position of the pawl being entirely out of the path of movement of the ratchet-wheel, and beyond the plane of the end of the cylinder, the cylinder is left free to be moved forward for inspecting the work or for removal from the carriage. The revolver spring 21 is sufficiently strong to resist the movement of the lever 2G upon its pivot so that the carriage may thereby be returned without revolving the cylinder, but a continued motion revolves the cylinder when the carriage stops, as before described.

Of course there might be known equivalents to a cam, substituted for the stud 22 and the cam slot 24, whereby a sliding motion of the revolver journal 17 would cause it to revolve, Without departing from the spirit of my invention.

Having thus fully described my invention, whatl believe to be new, and desire to secure by Letters'Patent, is the following:

1. The combination in a typewriting machine of a carriage; a paper-carrying cylinder hung to revolve therein; a revolver jou rnaled in the carriage to revolve concentrically with the cylinder and to slide longitudinally with its journal; a cam acting by the said longitudinal movement to rotate the revolver, and a lever communicating with the revolver and pivoted to swing in the direction of the movement of the carriage, substantially as described.

2. The combination in a typewriting machine of a carriage; a paper-carrying cylinder hung to revolve therein; a revolverjournaled in the carriage to revolve and to slide lengthwise in its bearing; and a cam substantially as described whereby the sliding motion of the revolver actuates it to revolve.

3. The combination in a typewriting machine of a carriage; a paper-carryin g cylinder hung to revolve therein, and a revolver located out of the path of the cylinder and journaled in the carriage to revolve and to slide longitudinally in its bearing to engage and revolve the cylinder, substantially as described.

ll. The combination in a typewriting machine of a carriage; a paper-carryin g cylinder hung to revolve therein; a revolver journaled to revolve in the carriage; a pawl fitted to slide in the revolver longitudinally to and from the cylinder and normally located out of the path of the cylinder; and a spring for projecting the pawl, substantially as described.

In testimony whereof l afiix my signature in presence of two witnesses.

FREDERICK L. GRASS.

Witnesses:

P. G. ELLswoRrH, S. E. MoCLUsKY.