US230596A - Stem winding and setting watch - Google Patents

Description

(MOdeL) '0, V. WOERD. Stem Winding and Setting Watch.

No. 230,596. Patented July 27,1880.

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CHARLES V. WOERD, OF VVALTHAM, MASSACHUSETTS.

STEM WINDING AND SETTING WATCH.

SPECIFICATION forming part of Letters Patent No. 230,596, dated July 27, 1880.

(Model.)

To all whom tt may concern:

Be it known that I, CHARLES V. Woman, of Waltham, in the county of MiddleseX and State of Massachusetts, have invented a new and useful Improvement in Watches, which improvement is fully set forth in the following specification, reference being had to the accompanying drawings, forming a part thereof, in which Figure 1 represents a plan view of the part of a watch-movement embodying my invention, Fig. 2 being an elevation of the same.

My invention relates to the hand-setting mechanism of stem-whirling and hand-setting watches, and has for its object to prevent the jumping of the hands when the mechanism is moved before or after effecting the setting operation.

My invent-ion consists in attaching a friction-wheel to the center staifand a corresponding one to the swing-yoke, both to take the place of toothed gears as heretofore used; and, further, my invention consists in a springlever for retaining the swing-yoke firmly in position when the latter is set for the setting operation and pressing the two friction-wheels together, so as to insure the rotation of one by l which normally holds its gearing out of connection with the handsetting mechanism. Upon the yoke g is formed a point or projection having two faces, g and g 11 represents acurvcd lever, pivoted at c and provided at one end with a spring-arm, c, (which is adapted to be slightly deflected toward the fulcrum of the lever 1),) and at the other end with an arm or handle, d, projecting outwardly through the case. When the lever b is turned on its pivot, by pulling the handle 61 outwardly the end of the spring-arm c bears against the face g and forces the yoke g to ward the center staff until the yoke is moved to such a point that its gearing is suitably engaged with the hand setting mechanism. When this point is reached the movement of the yoke is necessarily stopped and the springarm 6 yields sufficiently to pass over the apex of the point or projection and bear upon the face 9 The spring-arm is thus engaged with the yoke in such a manner as to hold it firmly in position to operate the winding mechanism.

hen it is desired to disconnect the yoke from the winding mechanism a slight inward movement of the handle (I will cause the arm 6 to leave the face g and pass over the apex of the projection, thus releasing the yoke, which is forced outwardly by its spring 5.

By the stem and the usual mechanism motion is given to the gearing on the yoke g. To the under side of the pinion h of the yoke is attached a V-grooved friction-wheel, t, and to the center staff and minute-pinion is secured a friction-wheel, It, the edge of which may be rounded. When the two friction-wheels are in contact the grooved periphery of the wheel 1 presses against the rounded edge of the wheel k and rotates the latter wholly by friction. By this means I overcome the chief objection to toothed gear-wheels heretofore employed in place of the wheels i7tviz., the liability of causing the minute-hand to jump from its proper position when the yoke is moved either to connect or separate said gears, particularly the latter, one gear being liable to be accidentally rotated by the other sufficiently to jerk the hand. It will be seen, however, that the friction-wheels can be pressed together and separated without the slightest liability of one being accidentally rotated by the other, said wheels giving the minute-hand a free, easy, and even motion.

1 do not confine myself to the shape of the edges of the friction-wheels, as shown in the drawings, but to any form which gives sufficient friction to carry the hands.

I am aware that a pivoted lever has been before employed to hold and release a swinging yoke in hand-setting devices, the lever being entirely rigid in construction-that is to say, having no yielding spring-arm to bear upon the yoke.

It will be seen that the elasticity of the arm 6 causes it to press the friction-wheclt against the friction-wheel It of the center shaft and maintain a uniform pressure between the two wheels when the yoke is adjusted for the handsetting operation, so that any inequalities in 2. In combination with the swinging yoke g, having a friction-Wheel, 6, adapted to engage with a corresponding wheel, is, on the center staff, the pivoted lever I), having a springarm, 6, adapted to press the Wheel 1' against the wheel 7; and insure the rotation of the latter by the former during the hand-setting 2o operation, as set forth.

CHAS. V. WOERD.

Witnesses:

M. WILDE, W. J AOKSON.

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