US654030A - Line-spacing mechanism for type-writing machines. - Google Patents

Description

No. 654,030. Patented luly l7, moo.

E. s. SHIMER.

LINE SPACING MECHANISM FOR TYPE WRITING MACHINES.

(Appl (No Model.)

M m m m: norms PCYERS co. PNOTO-LITNO a: I r

ELMER S. SHIMER, OF MILTON, PENNSYLVANIA.

LINE-SPACING MECHANISM FOR TYPE-WRITING MACHINES.

SPECIFICATION forming part of Letters Patent No. 654,030, dated July 17, 1900.

Application filed April 20,1900. Serial No. 13,620. (No model.)

To aZZ whom it may concern:

Be it known that I, ELMER S.'SHIMER, a citizen of the United States, residing at Milton, in the county of Northumberlandand State of Pennsylvania, have invented new and useful Improvements in Line-Spacing Mechanisms for Type-WVriting Machines, of which the following is a specification.

My invention relates to line-spacing mechanism for type-writing machines; and the objects of the same are to provide simple and efficient means for operating the spacing mechanism automatically with the carriage shift to give either a single or a double space between the lines at each return of the carriage and to so locate the lever for operating the spacing mechanism that it may be moved in the line of movement of the carriage to effect the spacing and the return movement of the carriage. I attain these objects by means of the mechanism shown in the accompanying drawings, which form a part of this specification, and in which- Figure 1 is a perspective view of one end of the platen-roll of a type-writing machine and showing my invention. Fig. 2 is a detail perspective view of the rocking rod for operating the spacing mechanism. Fig. 3 is a similar view of the pawl and its carrier. Fig. 4 is a detail perspective view of the gage-plate. Fig. 5 is a perspective view of the pawl-carrier. Fig. 6 is a similar view of the pawl. Fig. 7 is a perspective view of the spring.

Like numerals designate like parts wherever they occur in the different views.

The numeral 1 designates the platen-roll, and 2 is the ratchet-wheel on one end thereof. The framework 3 of the carriage is provided with a lug 4l,proj ectin g outward therefrom and having a hole therein which serves as a bearing for a sleeve 5, having bevel-cogs 6 at the outer end thereof. Secured to or formed with the sleeve 5 is a pawl-carrier 7, the outer end of which is bifurcated at 8 to form a bearing for the pawl 9. The pawl is pivoted between the bifurcations 8, and a spring 10 bears against the short arm 11 of the pawl, said spring being screwed to the pawl-carrier 7. The pawl consists of the long arm 12, the short arm 11, the pivot-bearing 13, the curved end 14, and the too 15. A gage-plate 16 is pivoted at 17 on top of the pawl-carrier, and at the opposite end from the pivot the gage is provided with downwardly-projecting ears 18, which straddle the pawl-carrier, but are of such distance apart as to permit a slight lateral movement on the pivot 17. The front edge of the gage is cut away on one side, so as to form a bearing 19, which maybe swung under the heel 20 of the pawl in order to change its position relatively to the ratchet-wheel 2, so that the platen-roll may be moved the distance of either one or two of the teeth of the ratchet-wheel 2 for the purpose of giving single or double space between the lines. The pawl is actuated by a rocking rod 21, journaled in lugs 22, projecting outward from the end of the carriage-frame. A beveled pinion 23 is keyed to the rod 21 and is in mesh with the cogs 6 on the sleeve 5. To limit the movement of the rocking rod, pin or stop 24: is used, said stop designed to come in contact with a part of the frame when the rod has been rocked the desired distance to perform its function.

The pin or stop 24 is screwed into the rocking rod 21 in the desired position to permit the rod to rock the required distance and to stop further movement of said rod by coming in. contact with a part of the frame.

The rod 21 extends outward and is curved downward to form a convenient handhold to operate it. A coiled spring 26 encircles the sleeve 5 and is secured at one end to the pawlcarrier at 27, and its opposite end bears upon the carriage frame. The function of this spring is to return the pawl and carrier to their original positions after they have been actuated by the rocking rod 21 to feed the paper.

From the foregoing it will be understood that when the gage 16 is set so that the bearing 19 is immediately under the heel 20 of the pawl the fulcrum of said pawl is changed, so that a greater scope is given to said pawl in order that the platen-roll and the paper may be fed the distance of two teeth on the ratchetwheel. Then the gage is turned so that the heel of the pawl rests on the pawl-carrier, the distance of one tooth will be given to the platen-roll by rocking the rod 21.

It will be noticed that there is but a single movement necessary to be given to the rod 21 to accomplish both the paper-feed and the return of the carriage and that this movement is in the line of travel of the carriage.

Having thus fully described my invention, what I claim is 1. In a type-writing machine, the line-spacing mechanism consisting of a ratchet-Wheel on the end of the platen-roll, a spring-pawl mounted on a sleeve having cog-teeth at one end, and a rocking rod carrying a pinion in mesh with the teeth on the sleeve, substantially as described.

2. In a type-writing machine, the line-spacing and carriage-shifting mechanism comprising a ratchet-wheel on the end of the platenroll, a pawl pivoted upon a pawl-carrier, said pawlcarrier being pivoted to the carriageframe, a rocking rod jonrnaled in the earriage-frame and provided with a pinion, cogteeth on the pawl-carrier in mesh with the pinion, said rocking rod being extended outward and downward to form a hand-lever to space and return the carriage, substantially as described.

3. A type-writing machine having a ratchet wheel on the end of the platen-roll, a pawl pivoted to a carriage journaled in the frame, cog-teeth on the carrier, and a rocking rod having a pinion thereon which engages the cog-teeth on the pawl-carrier, said rocking rod being journaled at right angles to the pawl-carrier and designed to be moved laterally to effect the line-spacing and to shift the carriage, substantially as described.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

ELMER S. SHIMER.

Witnesses:

W. H. BECK,

C. F. BALLIET.

Images