US93735A - Improvement in stem-winding watches - Google Patents

Description

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JAMES NARDIN, OF LOOLE, SWITZERLAND, ASSIGNOR TO V. T. MAGNIN, GUDIN,

AND COMPANY, OF NEW YORK.

Letters Patent No. 93,735. dated August 17, 1869.

IMPROVEMBNT IN STEM-WINDING WATGHES.

The Schedule referred to in these Letten Patent and making part of the same.

To al! whom it may concern Be it known that I, JAMES NARDLN, of Locle, in Switzerland, have invented a new and useful Improvement in Stem-Winding Watches; and I do hereby declare that the following is a full, clear, and exact de scription thereof, which will enable others skilled in the art to make and use the same, reference being had to the accompanying drawings, forming part of this specification.

rIhis invention relates to improvements in stemwinding watches, and watches having stopping-devices for the second-hands, hayingfor its object to arrange the slides by which the winding-devices are changed to gear with the hands, and the stopping is eected, for better protection against being moved by the accidental contact of the said slides against anything, when the watch is in the pocket or otherwise.

The invention also comprises an improved mode 'of operating the slide of the winding-apparatus, to gear the winding-stem with the hands, for turning them.

Figure l represents a face view, with the dial removed, of a stem-'winding and stop watch, with the gear applied to the hands for turning them,'for setting by the stem, some parts being shown in red.

Figure 2 represents a sectional detail.

Similar letters of reference indicate corresponding parts. v

Stem-winding watches are now commonly arranged' for adjusting the hands by the winding-stem, the toothed wheel thereon being arranged to slide out of gear with the winding-gears, and into gear with wheels gearing with the hands, a spring, moved by a slide, projecting through the case, to be pressed by Ithe thumb to-eiect the said change, the spring restoring the connection with the winding-gearwhen the thumb is removed.

This thumb-picce, projecting outside ofthe case, is liable to be inadvertentlymoved, and to catch in the clothing, Src. Pins, projecting from the cover, have been used to take into holes in these sides, tolock them, but this arrangement is objectionable.

I propose, instead of havingrthis slide B project through the case, to arrange it so as to project only through the bezel A, which holds the glass, and above or into the wall C of the case, where it is equally or nearly as accessible for pressing into gear with the hands as when projectingoutside, and where it is protected from accidental contact with anything tomove it, by the cover D, when closed.

I have also so arranged this slide or thumb-piece,- relatively to the bow E and oneof the collars F, thereon, commonly used to prevent the entanglement of the vest-chain with the milled head G ofthe winding-stem, that when the bow is turned over, in the po sition shown in red, the collar F will press upon the slide B, and force it inward, to effect the gearing with the hand-turning wheels.

a u a represent these wheels, and

b represents the sliding wheel, on the shaft of' the winding-stem, which is nioved into the position shown in red, to gear with the hand-turning wheels a.

d represents a spring-arm, to which the slide B is connected, and by which the wheel d is moved back andforth.

This arrangement of spring-arm d and gcar-whccls is such as commonly used, and I do not .claim it.

H represents the slide for moving the stop-devices for the seconds. The present mode of preventing this from being moved is also by the use of a pin, permanently connected to and projecting from the cover D, and taking into a hole in -the case, and' engaging the said slide H when the cover D is closed..

This arrangement -is objectionable, as the pin is liable to be bent when the cover is opened;` and a greater objection is, that when thehnge of the cover wears loose, the pin is' liable to strike on the iaceof the part k 'of the case, at the side of the hole, in shutting the cover.

I have, therefore, arranged the pin I permanently in the part 7c of the case, through which the slide H wcrks,.and have provided it with a spring, L, which may be coiled, or of other shape, to' throw it up out of the hole in the slide when the cover D opens. The closing of the cover presses the pin down again, and locks the slide.

I am aware'that watches are in use, provided with bows, on one end of which is formed an eccentric prospecified.

3. The arrangement, with the part K of the case, the slide H, and the cover D, of the spring-pin I, substantially as specified.

The above specification of my invention signed by me, this 5th day of' May, 1869.

. JAMES NARDIN.

Witnesses:

Crus. H. UPTON, AMI MAGNJN.

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