US321611A - krichevski - Google Patents

Description

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G. KRICHEVSKI 83 A EDMONDS. ESOAPEMENT FOR WATCHES.

No. 321,611. Patented July 7, 188-5..

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G. KRICHEVSKI & A. EDMONDS. ESGAPEMENT FOR WATCHES.

No. 321,611. Patented July 7, 1885.

WITNESSEgE "i MENTOR:

ATTORNEYS.

UNITED STATES ATENT nines.

GERSON KRIOHEVSKI AND ABRAHAM EDMONDS, OF NEV YORK, N. Y.

ESCAPEMENT FOR WATCHES.

SPECIFICATION forming part. of Letters Patent No. 321,611, dated .i'uly 7,1885.

Application filed January 19, 1885.

To aZZ whom it may concern.-

Be it known that we, GERsoN KRIOHEVSKI and ABRAHAM EDMoNDs, both of the city, county, and State of New York, have invented certain new and useful Improvements in Escapements for WVatches, of which the following is a full, clear, and eXact description.

The object of our invention is to reduce the friction and increase the durability of the esoapementmovement of watches; and our invention consists, principally, of acurved or circular detent or lockin g piece for the escapement-wheel.

The invention also consists in giving said detent or looking piece a circular movement for releasing the teeth of the escapementwheel.

The invention consists, also, of the means employed for rotating the eseapement-detent, and of the construction, arrangement, and combination of parts, all as hereinafter described and claimed.

Reference is to be had to the accompanying drawings, forming part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 shows our new eseapement-movement, the parts thereof being in the position they occupy when the escapement -wheel is held by the locking-piece or eseapement-detent, the latter shown in section on line as 00 of Fig. 5. Fig. 2 shows the same, the parts be ing in the position they occupy just as a tooth of the escapementwheel is released by the detent or locking piece. Fig. 3 shows the same after the tooth has passed the detent, showing a tooth of the escapement in engagement with the impulse-pallet to the balance-wheel. Fig. 4c shows the same, the parts being in the position they occupy at the time the disengaging-pallet passes the pawl or spring upon the escapement-lever during the return movement of the balance-wheel, and Fig. 5 is an enlarged edge view of the movement, showing the hair-spring and part of the balancewheel. Fig. 6 is a detail view.

A represents the lower plate, and the balance-wheel, of the watch-movement, and 0 represents the escapement-wheel. 7c is the staff on which the balance-wheel B is secured,

(No model.)

and on the staff It is secured the hair-spring w. (Shown in Fig.5.) The staff is provided with the disk-roller Z, which is formed with the disengaging-pallet m, to act in connection with the escapement-lever e and spring n, as hereinafter described, to vibrate the lever 12. The staff is is also provided with the larger diskroller q, formed with the impulse-pallet that intercepts the teeth of the escapenient-wheel O, and causes the wheel to impart new power to the balance-wheel.

a is the escapeinent-detent orlocking-piece, pivoted on its axis Z), and made practically semi-cylindrical or meniscus-shaped in crossseetion at the point where the teeth of the escapement-wheel come in contact with it. It is formed to present the curved horn or surface a as the point of contact with the teeth of the escapementwheel.

The detent a is rotary reciprocated on its axis by the vibrations of the lever e acting through the disk or arm 0, secured to the detent, and the pin 0, secured to the disk and entering the slot f made in the lever e. The

slot f and pin 0 may be reversed, if desired.

The lever c is pivoted at 6 is held pressed constantly toward the escapement-wheel by the spring h, the free end of which presses against pin 9, secured to the lever, and the said lever is provided with the above-mentioned spring a, that reaches past the free end of the lever, so as to stand normally in the path of the disengaging-pallet m, as shown clearly in the drawings.

The action of our eseapementmovement is as follows: The escapementwheel being held by the detent a, and the balance-wheel B swinging in the direction of the small arrows, (shown in the drawings, the disengaging-pallet m on the fixed disk Zwill strike the end of the delicate spring a and carry the lever e to the dotted line marked 6 in Figs. 1 and 3. In moving to this position the lever a will turn the holding piece or detent a and bring the curved portion a thereof from in front of the 9 tooth of the eseapeinent-wheel O and let the tooth pass. At the same time that the tooth passes the detent a theimpulse-pallet p, fixed to the roller-disk q, is carried to the dotted line marked r in Fig. 1, and the instant the tooth of the eseapenient wheel leaves the curved dctent a the tooth of the escapeinentwheel nearest the line marked 0' will strike the pallet 11 and throw the balance-wheel B, and staff It, and disks 9 Z, and pallets m p partly around the circle, or nearly a whole revolution. The instant the pallet m leaves the end of the spring on the lever e is forced back by the spring h to its orignal position, that shown in full lines in Figs. 1 and 3, which movement of the lever a will turn the locking-pallet a in position to intercept the next tooth of the escapenient-wheel. O. The hairspring a; will now return the balance-wheel, staff 70, disks Z q, and pallets p m, the spring n yielding to permit the pallet m to pass beyond it and past the lever 02 ready for another vibration.

A pin, 8, is fixed in the plate A of the watchmovement to prevent the lever n and detent a from being moved too far, and a pin, 8, is fixed in the plate A below the disk q to prevent vibration of the lever c.

Having thus described our invention, we claim as new and desire to secure by Letters Patent- 1. The detent a, connected with the lever c by an arm or disk, 0, and pin 0, entering a slot in the lever, substantially as described.

2. The semicircular detent a, formed or provided with an arm or plate, 0, substantially as shown and described.

GERSON KRICHEVSKI. ABRAHAM EDMONDS. XVitnesses:

H. A. \Vnsr, O. SEDGWICK.

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