US1434990A

US1434990A - Watch-winding chuck

Info

Publication number: US1434990A
Application number: US387812A
Authority: US
Inventors: Bascom J Brown
Original assignee: Individual
Current assignee: Individual
Priority date: 1920-06-10
Filing date: 1920-06-10
Publication date: 1922-11-07
Anticipated expiration: 1939-11-07

Description

B. J. BROWN. WATCH WINDING CHUCK. APPLICATION FILED 11m: 10, 1920.

Patented Nov. '7, 1922.

INVENTOR 5, JBeomv ATTORNE wind the watches on hand and this Patented Nov. 7, 1922.

retinas BASCOM J. BROWN, OF ENSLEY, ALABAIVIA.

WATCH-WINDING CHUCK.

Application filed June 10, 1920. Serial No. 887,812.

To all whom it may concern:

Be it known that I, BASCOM J. BROWN. a citizen of the United States of America, residing at Ensley, in the county of Jefierson and State of Alabama, have invented certain new and useful Improvements in Watch-Winding Chucks, of which the following is a specification.

This invention relates to a watch makers tool especially adapted for winding all sizes of watches. At the present time watch makers and repairers are required daily to involves a very considerable waste of time and energy.

The object of this invention is to provide a very simple and inexpensive chuck or tool adapted to be inserted in the watch makers lathe and which carries a rubber or friction pad of such shape and dimension as to receive the various sizes of watch crowns and to frictionally grip same so that the crown is'turned with the chuck and the watch thus mechanically wound.

It is of especial importance in connection with my invention to note that the watch maker skilled in the art can by hand so regulate the frictional engagement between the crown and the friction pad of the chuck as to insure slippage when the spring is sufficiently wound. In this way the watches with the longest springs and small wristwatches with lightest springs can all be wound with the same device and without danger of breaking the spring.

While it is understood that my invention may be variously constructed, I have illustrated' in the accompanying drawings what I regard as the preferred embodiment of the same.

As illustrated in the drawings Fig. 1 shows the chuck in side elevation with a watch crown. pressed thereagainst for the purpose of winding the watch.

Fig. 2 is an end view of the chuck; and

Fig. 3 is a detail sectional view through the friction pad.

Fig. 4 is a cross-sectional View through the chuck clamp showing the rubber pad in elevation.

Similar reference numerals refer to similar parts throughout the drawings.

The chuck comprises a body member 1 having a shank 2 adapted to fit into the ordinary watch makers lathe. The body has a knurled rim 3 and within is threaded to receive the threaded extension 4 on the chuck member 5, which is provided with a knurled rim 6. This chuck member 5 is provided with.an enlarged annular opening 6 at its outer end through which projects the concave working face 7 of a friction pad 8 which is held in the chuck by be ing clamped between the members 1 and 5 and which may be made of rubber or any suitable friction material. The concave working face of the rubber pad is concentric with the axis of the chuck shank 2 and is wide enough to accomodate the largest watch crowns. The concave working face gives the most satisfactory frictional engagement with the crowns of different sizes that may be fitted thereinto.

Having assembled the chuck in the lathe and started the lathe, the watches are wound as fast as they can be picked up and their crowns pressed to the rapidly rotating friction pad. When the spring is sufficiently wound its resistance causes the crown to slip, thus automatically protecting the spring. The friction pads are inexpensively and readily replaceable so that the life of the tool is indefinite. The type of the friction pad holder may be widely varied and the construction and material of the friction pad itself may be changed to meet the different conditions. but I have obtained best results from a soft rubber pad.

Without intending to limit myself to the specific details of construction described, what I claim as new and desire to secure by Letters Patent, is

1. A watch winding tool comprising a chuck having a shank adapted to fit into a watchmakers lathe and having a socket. a rubber friction pad mounted in said socket and having in its outer end a deeply indented cone shaped seat, the axis of which is in alignment with the axis of the shank, and demountable means to clamp said pad in said chuck socket.

2. In a watch winding tool, a chuck having a shank adaptedto fit into a watchmakers lathe, a recess in the outer end of said chuck, a rubber friction pad having chuck to clamp the pad base firmly in said its base adapted to fit into said recess and recess, substantially as described. 10 having a reduced outer end formed with In testimony whereof I afiix my signaa deeply indented cone shaped socket disture. v

osed with its axis in ali ment with the xis of theshank, and a sa div sleeve adapt- ,BAbGOM T O ed to slip over'the indented end of the pad Witness: and to have threaded engagement with the Norma WELSH.