US151333A

US151333A - Improvement in watchmakers tools

Info

Publication number: US151333A
Authority: US
Publication date: 1874-05-26
Anticipated expiration: 1891-05-26

Description

1. F. YOUNG.

Watch Makers Tools.

Patented May 26,1874.

Jag.

No.l5l,333.

UNITED STA JULIUS F. YOUNG, OF OWATONNA, MINNESOTA.

Specification forming part of Letters Patent No. 151,333, dated May 26,1874; application tiled Aprn 1s, 1874.

The object of this invention is to furnish means for reducing the tension and elasticity ot' hair-springs of watches, so as to vary the time or action of the watch-movement from fast to slow, as may be desired.

In the accompanying drawing, Figure lis a side View of the tool. Fig. 2 is a top View, and Fig. 3 an end View.

Similar letters of reference indicate corresponding parts.

A is the body or bed of the tool, which is confined (when in use) in a vise by griping the lug B on the under side of the bed. O is an adjustable rest, which is designed to hold between it and the stationary stand D any diameter ot'watch balance-wheel with the hair-sprin g and parts connected therewith. This rest O is adjusted, as may be desired, with reference to the stand D, by the finger-screw E. The arbor of the balance-wheel rests in slots in the rest C and the stand, as represented in the drawing. F is a spiral spring on the screw E, between the rest O and the body of the tool, to keep the rest steady and in position. G is the` hair-spring. The balaneewheel with the hairspring being thus confined, the end of the hairspring is taken hold of with a pair of pliers or tweezers, and is gently drawn along under the spring-clamps H and I. These clam ps are first raised by means ofthe fingerscrews J and K. The clamp I is then screwed down onto the haiihspring, and then the clamp II is screwed down. These clamps hold the hair-spring tlat to the bed A, so that with a scraper ot' any suitable kind the hair-spring may be reduced so as to alter the running of the watch i'roin five minutes to an hour and a half in twentyfour hours. \Vhen the clamps are raised the hair-spring is allowed to slip back by its own tension, so as to assume its former diameter, and is readily recoiled. For producing the desired eii'ect it is only necessary to scrape a space of, say, one-halt' inch ot the hair-spring. The balance-wheel and hair-spring are. new taken out by turning the iingerscrew E, and replaced in the watch.

This, it is believed, is the only reliable means of weakening` the hairspring of a watch. By the tool above described this may be done in the inost expeditious and perfect manner.

Hayin g thus described my invention, I claim as new and desire to secure by Letters, Patent- A tool for watch-makers for reducing hairsprings, having a bed, A, and adjustable rest O, a stationary stand, l), clamps H and I, and iinger-screws E and J K, arranged substantially as and for the purposes herein shown and described.

JULIUS F. YOUNG.

IVitnesses:

HENRY Bonennn'r, J. WV. HALL.