US213048A - Improvement in stop-watches - Google Patents

Description

U. A. JUVET. Stop-Watches.

No. 213,048. Patented Mar. 11,1879.

" R5. FHOTOLITHOGRAFHER, vusumsmn, 9 C

UNITED STATES PATENT OFFICE.

'ULYSSES JUVET, ()F GLENS FALLS, NEv T YORK.

IMPROVEMENT IN STOP-WATCHES.

Specification forming part ofLetters Patent No. 213,048, dated March 11, 187i) application filed July 18, 1878.

To all whom it may concern:

Be it known that I, ULvssns A. JUvET, ot' Glens Falls, in the county of \Varren and State of New York, have invented a new and useful Improvement in Stopatches, of which the following is a specification:

The object of my invention is to dispense with the additional movement commonly used to run the independent second-hand in stopwatches, and to obtain an independent secondhand by so mounting the secondhand that it maybe detached from its running-pivot and instantly stopped, or maybe as readily replaced in connection with the pivot so as to run therewith. To this end I attach the second-hand to a split cannon fitting on the pivot of the second-wheel, so as to be driven byhard friction, and having a baseflange, which is engaged between two springs, which may be raised or depressed by the action either of a push-pin in the pendant, or a slide in the edge of the case, or a lever within the case, as preferred, and when raised will remove the cannon or sleeve from the friction of the pivot and hold it still, or when depressed will restore the cannon to frictional connection with the pivot and then release it, so that the second-hand may partake of the motion of the pivot.

My invention further consists in mounting the second-hand of a watch on a pivot or axis made in two parts, so as to render it detaclr able, as hereinafter described.

In order that my invention may be clearly understood, I will proceed to describe it with reference to the accompanying drawings, in which- Figure 1 is a plan view of the movement. Fig. 2 is a section on the line 2 2, looking in the direction of the arrows, and showing the second-wheel cannon in frictional connection with the pivot of the running wheel. Fig, 3 is an elevation of the springs detached. Fig. 4L is an elevation of the lever employed under the present illustration to move the carriage which raises the springs or permits their descent. Fig. 5 is a section, showing the second-hand cannon elevated out of frictional connection with the pivot and held by the springs.

A and 13 are springs, attached by screws a b to the dial-plate 1, and, when free, pressin g down on said plate by their own resilience.

The free ends of the said springs are perforated, so as to encircle the pivot c of the second-hand wheel E, and receive between them the flange d of a split cannon, D, which carries the second-hand S, and when depressed, as shown in Fig. 2, runs with the pivot 12 by hard friction.

To raise the springs when. required to remove the cannon from frictional connection with the pivot, I employ a carriage, 0, having a stud, 0, which projects beneath the springs A B. A spring, F, throws the carriage back, so as to permit the springs A B to descend.

The carriage may be driven in by a simple sliding movement by means of a push-pin in the pendant.

In the present illustration 1 have shown it as an L-shaped lever, fulcrumed at g, and actuated by a lever, H, working on afulcrumserew, 2', and provided with a stud, h, which bears against the inclined back of the carriage 0, so as to throw it forward when the lever H is moved and slips just beyond the projecting angle of the L-shapcd carriage, so as to lock it in its forward position.

The lever H works within a notch, in the margin of the dial-plate, the ends of which notch form stops to limit the motion of the lever in either direction.

The peculiar forms'of the respective springs A B, to adapt them to raise and lock the hand S when the carriage C is moved forward, or to depress and release it when the carriage is moved back, are best shown in Fig. The spring A is bent downward toward its extremity, and interposed between the cannonflange d and the plate P, the inclined shoulder 1 forming a bearing against which the stud c of the carriage engages, so as to throw up the spring and thereby raise the hand.

The spring B, which acts, in combination with the spring A, as a clamp when the cannon is elevated, and is also employed to depress the cannon and restore it to frictional connection with the pivot, surrounds the cannon above its flange cl, and has two shoulders, 2 S, with which the cai'riagestud c engages in its forward and backward movements, in each case raising the spring olf the flange (l; but the shoulder 2 may be dispensed with.

By the invention above described a common to relieve it from hard frictional contact with the pivot e, and clamping it by its flange 6?, so as to hold it still while the pivot continues to run. When the carriage is retracted its stud c recedes from the shoulders 1 and 2 of the respective springs, causing the springs to descend, and the upper one, B, to press the cannon D-firmly down on the pivot 6, so that it will be driven thereby; and'the continued movement of the stud brings it against the shoulder 3, so as to raise the spring B alone, and thus remove it from frictional contact with the cannon-flange d.

It is not material to the invention whether the spring B is provided with a shoulder, 2,

to receive the forward impact of the stud 0. If this shoulder is dispensed with the spring is raised by the same movement of the stud, acting through the medium of the spring A and flange d.

Having thus described my invention, the

following is what I claim as new therein and desire to secure by Letters Patent:

1.. An independent second-hand connected to its running-pivot c by a flanged cannon, D d, in combination with a pair of springs or levers, AB, operating in the manner described, to disconnect the hand from its running-pivot and replace it in connection therewith.

2. In combination with the running-pivot e and the detachable cannon D, carrying the second-hand S, the springs A 13, having shoulders 1 3, and the slide (J,-a'cting on said shoulders to .detach and lock or replace and re- I lease the second-hand, as described.

ULYSSES A. J UVET.

Witnesses:

E. '1. J oHNsoN, O. R. SUMMERs.

Images