US556993A - Linotype-machine - Google Patents

Description

(No Model.) j

N. A. LARKIN. LINOTYPE MACHINE.

Patented Mar. 24, 1896.

. UNITED STATES PATENT OFFICE.

NELSON A. LARKIN, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE MERGEN- THALER LINOTYPE COMPANY, OF NEW JERSEY.

LINOTYPE-MACHINE.

SPECIFICATION forming part of Letters Patent No. 556,993, dated March 24, 1896. I

Application filed January 31,1896. Serial No. 577,5 '75. (No model.)

T0 at whom it may concern.-

Be it known that I, NELSON A. LARKIN, of Chicago, county of Cook, and State of Illinois, have invented a new and useful Improvement in Linotype-Machines, of which the following is a specification.

I11 linotype-machinessuch, for example, as those represented in Letters Patent of the United States issued to Ottmar Mergenthaler, dated September 16, 1890, Serial No. 436,53o it is desirable to prevent the operation of the pump-plunger which delivers molten metal to the mold in the event of the matrix-line being too short or of there being no line of matrices in front of the mold. In such event the lever for raising the j ustifying-wedges in the line, commonly known as the justifyinglever, will rise to an abnormal height.

My invention relates to a pump stop device through which this abnormal rise of the justifying-lever is utilized in a simple and effective manner.

The invention consists in a stop lever pivoted to the metal-pot or other suitable part of the machine, its lower end being arranged in position to be acted upon by the justifyinglever whenever it rises to an extreme height and its upper end in position to engage the pump-lever.

The accompanying drawing represents the melting-pot and adjacent parts of the Mergenthaler machine with my improvement applied thereto.

The drawing is limited to such parts as are necessary to an understanding of my invention. In all other respects theymay be of ordinary construction and arrangement.

Referring to the drawing, A represents the melting-pot, arranged to swing forward and backward on a shaft B, which gives support to its legs.

0 is a cam to advance the melting-pot, arranged to act on a roller cl carried by a lever d, which latter has its upper end pivoted between two ears (I at the top of the pot, and its lower end supported by a spring (2 seated on a stud or bolt d passing through the lever cl and through an ear on the bottom of the pot. This lever and roller constitute a spring connection between the cam and the pot, so that a yielding pressure is applied to the pot.

E represents the pump-lever, fixed at fulcrum c and connected at one end to the pump plunger or piston F, the lower end of which, seated in a well in the pot, serves to deliver the molten metal through the mouth of the pot to the mold. The pump-lever is depressed by a spiral spring 6, and is elevated at the proper time by a cam K, which acts against a roller in the lower end of the lever.

J is one of the j ustification-levers arranged to vibrate vertically.

All of the foregoing parts are of the ordinary construction and arrangement and constitute no part of my invention.

In applying my improvement I provide an angular lever H, made in one piece, and mounted preferably, as shown, on the pot stud or bolt 61 as a fulcrum, its upper end being extended upward between the ears (I of the pot in such position that when thrown to the left it will engage under a projection h on the pump-lever to prevent the lever from falling and catching the pump or plunger. The lower end of the stop-lever H is carried to the right, so that it overlies the justification-lever J, and whenever this lever is permitted to rise to an abnormal position by reason of the existence of a short matrix-line it will lift the lower end of the lever H and engage its end with the pump-lever, thus preventing the action of the pump and rendering the delivery of metal to the mold impossible. I prefer to provide the lower end of the lever with an adjustable stud h extending vertically therethrough and having a lock-nut on its upper end. The justification-lever acts against the lower end of this stud. By adjusting the stud the stop may be caused to operate whenever the lever J reaches a predetermined height. This adjustment permits the ma chine to be operated by a greater or less amount of space in the matrix-line, as circumstances may render expedient. Under ordinary circumstances the stop-lever will fall back out of engagement with the pump-lever by gravity, but a spring I is commonly attached to the stop-lever, as shown, to throw it backward.

I am aware that a pump-locking device has been operated by the justifying-lever in a linotype, the connections being indirect.

Having thus described my invention, what I claim is- I oo 1. In a linotype-machine and in con1bination with the pump-lever and justificationlever, a stop-1ever having one end arranged to engage the pump-lever and the opposite 5 end arranged to be acted upon by the justification-lever.

2. In a linotype-machine and in combination with the pot, the pump-lever and the j ustification-lever, the angular stop -1ever II 10 mounted on the pot-stud and arranged to operate with the pump-lever and justificationlevers, substantially as described.

3. In a linotype machine the combination of a pot, pump-lever, the angular stop-lever, its retracting-spring and the justification- 15 lever.

In testimony whereof I hereunto set my hand this 28th day of January, 1890, in the presence of two attesting Witnesses.

NELSON A. LARKIN. \Vitnesses JOHN L. CRAMER, FRED 0. BROWN.

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