US247721A - Edwaed wensch - Google Patents

Description

(No Model.)

B. WENSOH.

ESOAPEMENT FOR WATCHES.

Patented Sept. 2'7, 1881 UNITED STATES PATENT ()Frrcie EDWARD WENSOH, OF VIENNA, AUSTRIA, ASSIGNOR OF ONE-HALF TO JOHN JAMES HANHART, OF SAME PLACE.

ESCAPEM ENT FOR WATCH ES.

SPECIFICATION forming part of Letters Patent No. 247,721, dated September 27, 1881.

Application filed June 30, 1881. (No model.)

To all whom it may concern Be it known that I, EDWARD WENsoH, of Vienna, Austria, have invented a certain new and Improved Escapement, of which the following is a specification.

The object of my invention is to provide a new and improved escapement for watches or other machines in which the power is not trans mitted directly from the escapement-wheel to the balance or pendulum, whereby the movement of the watch, clock, or other machine will be more regular and uniform than that of the watches and clocks made heretofore.

The invention consists in an anchor-rod piv- 5 oted on the top plate of the works, and having its lower end T-shaped, with a tooth engaging with the escapement-wheel at the ends of this T-shaped part, and the upper end of this rod is provided with a fork surrounding 2 an eccentric on the shat't'of the balance-wheel, above which eccentric there is a plate with a pin at the edge, which a spring presses against for imparting motion to the balance-wheel.

In the accompanying drawings, Figures 1,

5 2, and 3 are plan views of my improved escapement, showing the same in its various positions.

The balance-wheel b is pivoted to the top plate, P, of the works and the bridge k, and is 3 provided with a hair-spring, S, in the ordinary manner. A small eccentric, e, is mounted on the shaft or arbor of the balance-wheel, and is surrounded or embraced by the prongs of a fork at the end of a rod 9, pivoted to a clip or bridge, 70'', and the top plate, P, and has a T- shaped lower end, provided with the end teeth, a a An eccentric pin or stud, 1', projects from the top of the balance-wheei b, and a spring, f, reaching up to the center of the balance-wheel,

4 is attached to the bridge or clip k of the es eapement-wheel r, and this sprin g f is provided with a tooth or shoulder, a, which is so located that it can engage with the teeth of the escapement-wheel 1". For pendulum-clocks the construction would have to be modified slightly.

The operation is as follows: If the balancewheel 1) moves so farin the direction of the arrow arthat the pint comes in contact with the spring f, as shown in Fig. 1, the eccentric ehas reached its maximum of movement in the direction toward the left, and as the fork of the rod 9 embraces this eccentric the upper or forked end of the rod g has also moved to the left, and by this inovementtthe tooth a is engaged with the teeth of the escapement-wheel, whereas the tooth c is disengaged, and the tooth to thus stops the escapement-wheel r. The spring f presses against the stud t, and, bein gin tension, drives the balance in the inverse direction of the arrow x-that is, in the direction of the arrow y-and the tooth or shoulder a of the springf comes in contact with the next tooth of the wheel r, as shown in Fig. 2. By its own inertia the balance I) is carried farther inthe direction of the arrow 3 and the eccentric 'e and the fork of the rod 9 have now'reached their maximum of movement in the right-hand direction. The tooth a is now. engaged with the escapement-wheel, and the tooth to is disengaged, and the tooth of the wheel 1, which has been previously stopped by the tooth a, is released, and the wheel r moves so far in the direction of its arrow that the next tooth, which previously was free, is stopped by the tooth 01?. During the movement the springf has been put in tension by the action of the tooth a on the tooth a of the spring. The balance b makes its return movement in the direction of the arrow or, the pin i strikes the springf, the shoulder or tooth to is released from the tooth a, and the spring f gives the balance-wheel a fresh impulse, and the above-described operation repeats itself. These movements take place as long as the escapement-wheel r is driven by the motor of the watch or other machine. By these means the escapement-wheel does not directly transmit the motive power of the clock-work to the balance; but the movement depends on the power of the spring j, which always remains'regular. Itfollows that the movement of any clock-work or machine which is provided with my escapement must be most exact, and the movement can never vary, because the motive power of the spring f always remains the same.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent-- 1. In combination, with the balancewheel B, provided with the eccentric pin 0' and the scape- 10o the shaft of the balance-wheel b, the pivoted rod g, provided with a fork at one end and 1' 5 teeth a a? at the other end, and of the spring f, substantially as herein shown and described, and for the purpose set forth.

In testimony whereof I affix my signature in presence of two witnesses.

EDWARD WE NSC H.

Witnesses VICTOR KARMIN, Engineer. HANS KOTIAS.

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