US458911A

US458911A - Safety attachment for stem-winding watches

Info

Publication number: US458911A
Authority: US
Publication date: 1891-09-01
Anticipated expiration: 1908-09-01

Description

(No Model.)

B. A. LUCAS & G. P. PHELPS. SAFETY ATTACHMENT FOR STEM WINDING WATCHES.

No. 458,911, Patented Sept. 1,1891.

a Q) Q Q \T a N N g WITNESSES:

IIVVE TOR: 2/ MM/ UNITED STATES PATENT OFFICE.

RAYMOND A. LUCAS AND CASPER F. PHELPS, OF KOIIALA, HAWAII.

SAFETY ATTACHMENT FOR STEM-WINDING WATCHES SPECIFICATION forming part of Letters Patent No. 458,911, dated September 1, 1891. Application filed January 29, 1891- Serial No. 379,592. (No model.)

To all whom it may concern.-

Be it known that we, RAYMOND A. LUCAS and CASPER F. PHELPS, of Kohala, Hawaii, Hawaiian Islands, have invented a new and Improved Safety Attachment for Stemindin g Watches, of which the followingis a specification, reference being had to the annexed drawings, forming a part thereof, in which Figure 1 is a front view of a watch-move ment provided with our improvement. Fig. 2 is a partial front View with parts broken away to show the internal construction, and Fig. 3 is atransverse section taken on line a; on in Fig. 1.

Similar letters of reference indicate corresponding parts in all the views.

The object of our invention is to provide an attachment for stem-winding watches by means of which the winding-gear will be disengaged when the spring is wound.

Our invention consists in the combination, with the winding mechanism, of a bevel wheel attached to the winding-wheel, a threaded spindle provided with a bevel pinion engaging the bevel-wheel on the winding-wheel, an internallythreaded pinion placed on the threaded spindle, a wide-faced pinion journaled in a mortise in the front plate of the movement and en gaging the intern ally-thread ed pinion, a bevel-wheel secured to the spring barrel, and an arbor provided at one end with a pinion engaging the bevel-wheel on the barrel and furnished at the opposite end with a bevel-Wheel engaging the wide-faced pinion, all as will be hereinafter more fully described.

The watch-movement A is provided with a winding-stem B of the usual description, carryin g a bevel-pinion a, which engages the bevel-wheel b, pivoted concentrically with the lever c to the front plate C of the movement.

To the lever c is pivoted the hand-setting pinion d, which is continually in engagement with the wheel I) and is capable of engaging the spur-wheel e on the minute-hand arbor when the watch is adjusted for setting. To the lever c is also pivoted a spur-wheel f, which continually engages the wheel I), and which may be thrown into engagement with the spur-wheel g on the barrel-arbor it. The lever c is moved by drawing out the windin stem B, or in any other well-known way,

To the front plate of the watch-movement is pivoted a spring-pressed click '2', which engages and retains the spur-wheel g so as to prevent it from retrograde movement. A bridge 3', attached to the front plate of the movement, supports the upper end of the barrel-arbor.

To the under surface of the bridge j is pivoted a U-shaped lever D, one end of which touches the lever 0, while the other end reaches round to the opposite edge of the wheel g. In the bridge j and the bracket 7.5, attached to the front plate of the movement, is journaled a screw Z, upon which is mounted an internally threaded pinion m. The screw Z also carries a bevel-pinion 'n, which is engaged by a bevelwheel 0, secured to the face of the wheel g.

In a mortise in the plate C is journaled awide-faced pinion p, which engages the pin ion on on the screw Z.

I11 supports projecting from the inner face of the front plate of the movement is journaled an arbor 7, provided at its outer end with a bevel cog-wheel 4', which engages the wide-faced pinion p. The opposite end of the arbor q carries a bevel-pinion s, which is engaged by a bevel wheel t on the head of the spring'barrel E. A stud it, projecting from the inner face of the lever c, is engaged by a spring c, which presses the stud forward, so as to hold the wheel f normally in engagement with the wheel g. IV hen the spring is wound by turning the stem B in the usual way, the turning of the screw Z, by virtue of its connection with the barrel-arbor h, results in the moving of the pinion m forward toward the arbor h, the said pinion being prevented from turning by the wide-faced pinion p, and the parts are so proportioned that as the spring is wound sufficiently the boss of the pinon m is brought into contact with the lever D, which lies in its path and the forward movement of the lever D forces the lever c away from the wheel g, thus disengaging the wheel f from the said wheel g, so that the continued turning of the stem B results only in the movement of the wheels a, b, and f. As the watch runs down the turning of the barrel E turns the wide faced pinion 19 through the medium of the bevel-wheel 1 carried by the barrel, the pinion s, arbor q, and pinion o, and the said wide-faced pinion 1) turns the pinion m on the screw Z, causing the pinion to return to the position of starting.

It is obvious that if the watch is wound when only partly run down the pinion m will advance through a shorter distance to throw the winding mechanism out of gear, so that the length of the screw-threaded arbor to be traversed by the pinion m is always proportional to the amount of spring unwound.

Having thus described our invention, we claim as new and desire to secure by Letters Patent 1 1. The combination, with the winding-wheel and barrel of a stem-Winding watch, of a screw-threaded arbor arranged to take motion from the winding-wheel, a threaded pinion placed 011 the threaded arbor, a wide-faced RAYMOND A. LUCAS. CASPER F. PHELPS. Witnesses:

C. J. FALK, .T. WILLIAMs.