US335471A

US335471A - Watch-winding mechanism

Info

Publication number: US335471A
Authority: US
Publication date: 1886-02-02
Anticipated expiration: 1903-02-02

Description

2 Sheets-Sheet 1.

(No Model.)

0. M ORLET.

WATCH WINDING MECHANISM.

N0. 335,471. Patented Feb. 2, 1886.

WITNESSES:

ATTORNEYS N, PETERS. PhoXu-Lnhogr (No Model.) 2 Sheets-Sheet 2.

O. MORLET.

WATCH WINDING MECHANISM.

No. 335,471. I Patented Feb. 2, 1886.

WITNESSES: INVENTOR v %L&d- %W %ZVM& M I ATTORNEYS- N PETERs, PhOlO-Lnlwgraphur. Wnshmglun, 0.6.

JNTE D STATES GHARLE MORLET, OF NEXV YORK, N. 1 ASSIGNOR TO HIMSELF AND PROS- PER NORDMANN, OF SAME PLACE.

WATCH-\NINDENG hilECi-iANiSlVl.

EPECKEICATION forming part of Letters Patent No. $35,?71, dated February 2,1836.

Application filed June 7, 188-1. Sciia1 No. 134,161. (No model.)

To aZZ whom it may concern.-

Be it known that I, CHARLES Monnn'r, of the city, county, and State of New York, have invented certain new and useful Improvements in Stem-finding Attachments to Vatches, of

which the following is a specification.

This invention relates to an improved safety attachment for stem-windin g watches, whereby the straining of the mainspring and the break- IO ing of the same by careless turning of the winding mechanism are prevented, and thereby the danger of injury to the spring-barrel and the transmitting gear-wheels of the movement diminished.

[5 The invention consists of the combination, with the stemwinding mechanism and the spring-barrel, of an intermediate safety mechanism or stop-motion by which the winding up of the mainspring is interrupted before overstraining can take place.

The invention consists more especially of the combinatiomwith the arbor of the springbarrel, of a ratchet wheel placed thereon, a spring-pawl engaging said ratchet, a cam or dog for releasing said pawl from the ratchet, and a disk engaging the cam by a projecting pin, said disk being provided with teeth which are engaged by a pin secured to a collar of the arbor of the spring-barrel, as will more fully 0 be described hereinafter, and finally be pointed out in the claim.

In the accompanying drawings, Figures 1 and 2 represent side elevations of two different stem-winding watches with my improved safe 3 5 ty attachment applied thereto, said elevations being taken from opposite sides. Fig. 3 is a vertical transverse section on line 00 m, Fig. 2. Fig. A is a detail side view and a vertical transverse section of the covering plate of the sprii'ig-barrel enlarged; and Figs. 5 and 6 are details of the safety attachment arranged on the cover of the spring-barrel, also enlarged.

Fig. 7 is a view similar to Fig. 3 on a greatly enlarged scale.

Similar letters of reference indicate corresponding parts.

Referring to the drawings, A represents the springbarrel of a wateh-moven1ent, and a the arbor ofthe same. The mainspring bis wound up in the usual manner in stem winding watches by a pinion, (Z, keyed to the stem of the watch, a wheel, d, intermediate pinion, d, and a gearwheel. it, keyed to the arbor a of the spring-barrel, as shown in Figs. 1 and 3. The mainspring b is attached in the usual manuer at its inner end to a collar, 6, of the arbor a, and at its outer end to the spring-barrel A. To the collar 6 is applied a pin, e, which engages recesses fin the circumference of a disk, f, that is guided ina circular depression of the cover A of the spring-barrel A, as shown in Fig. a, the disk f having as many recessesj" as rotations are desired to be imparted to the arbor a. In the drawings three recesses are shown, so that the arbor makes three full rotations for winding up the mainspring. The outer end of the arbor a is further provided with the usual ratchet-wheel, g, and a springactuated check-pawl, g, as shown in Fig. 2, by which the mainspring is retainedin woundup position during the intervals of time when the arbor is not turned.

The mechanisms so far described have been used heretofore in stem-winding watches, and I do not lay any claim to the same. The safety attachment by which unduestrain on the mainspring is prevented consists of a ratchet-whee], ii, that is attached to the gear-wheel at that side facing the cover A, said ratchet and gearwheels being placed loosely on the arbor a, as shown in Fig. 7. A pawl, h, is fulerumed to the disk a and thrown into engagement with the teeth of the ratchet-wheel h by a spring, hi A cam or dog, 7L3, is fulcrumed to the disk at near the spring h, so as to press upon the 8 same when the projecting heel h of the dog It is engaged by a pin, f, of the diskf, as shown in Fig. 5. This takes place when the mainspring has been wound up nearly to its full extent, as thereby the pin 6 has turned the disk f and moved its pin f into the path of the dog 71.. Vfhen the winding of the stem is continued, the dog A is turned on its fulcrum by the pin f, so that its end presses upon the spring M, which throws thereby the pawl h 5 out of engagment with the ratchet-wheel h as shown in Fig. 6. As the disengagement of the ratchet-wheel h by the pawl h takes place be fore the mainspring b is entirely wound up, it is obvious that the overstraining of the same is avoided by the automatic action of the safety attachment. The turning of the winding 5 mechanism may therefore be continued without affecting the mainspring, as the transmittin g-wheel d and the ratchet-wheel h, attached thereto, turn loosely on the sleeve of the disk a without transmitting motion to the arbor a.

IO By the unwinding of the mainspring permitted by the running of the watch, the springbarrel A and its cover A turn on the arbor a in the same direction in which said arbor turned in the spring-barrel in winding, by 15 which these parts move relatively in opposite direction and the dog h returned into its normal position (shown in Fig. 5) by the pressure of the pin f on the longer projecting end of the dog h whereby the latter is in position to 20 actuate the safety attachment at the next winding up ofthe mainspring. By the gradual unwinding of the mainspring the diskf is returned into the position shown in Fig. 4. By vthe winding-up mechanism the safety attach- 2 5 ment is thrown out of gear at the proper moment, so that the overstraining and breaking of the niainspring by careless winding is prevented, and, consequently, any danger of injury to the train of the watch-movement and the winding mechanism in consequence of the breaking of the spring is obviated.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- In a stem-winding watch, the combination of the spring-barrel, mainspring, winding-ar- 5 bor, and winding-up mechanism of a safety attachment consisting of a ratchet-wheel on the transmitting-gear, of the winding-up mechanism, a disk keyed to the winding-arbor, a spring-pawl fulcrumed to said disk, a dog, also fulcrumed to said disk, and a recessed disk turned by the winding-arbor and provided with a pin for engagingthe dog, so as to throw the spring-pawl out of or into engagement with the ratchetwheel of the winding gear, .sub- 5 'stantially as set forth.

In testimony that I claim the foregoing as my invention I have signed my name in presence of two subscribing witnesses.

CHARLES MORLET.

\Vitnesses:

PAUL GOEPEL, SIDNEY MANN.