US1029116A - Stem winding and setting watch. - Google Patents

Description

J. A. FREUND. STEM WINDING AND SETTING WATCH. APPLICATION FILED DEC. 8, 1911.

Patented June 11, 1912.

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JOSEPH A. FBEUND, OF 'W'ALTHAM, MASSACHUSETTS, ASSIGNOR TO THE KEYSTONE HATCH CASE COMPANY, OF PHILADELPHIA, FENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

STEM WINDING AND SETTING WATCH.

To all whom it may concern.-

Be it known that I, Josnrrr A. FREUND, a citizen of the United States, and a resident of Waltham, in the county of Middlesex and State of Massachusetts, have made and invented certain new and useful Improvements in Stem lVinding and Setting atches, of which the following is a specification.

My invention relates to an improvement in watch movements, and more particularly to the type usually known and referred to as pendant set movements, the invention being directed more particularly to the mechanism for winding and setting and movement.

In watch movements as heretofore constructed, more or less objection has been urged against the difiiculty of changing the mechanism from the winding to the setting position, considerable force being necessary to pull out the winding stem to such position as will bring the parts into the setting adjustment. in fact, so great is the pull on the stem necessary, that in many instances the owner of a watch hesitates to change from the winding to the setting position, fearing to injure the movement. Furthermore, as the parts are generally constructed and arranged, the force required to change the adjustment from the winding to the setting position increases with the pull on the stem, for the reason that while the parts are in their winding adjustment, the beveled faces contact at but one point, but which beveled faces, as their positions are altered, become parallel and contact throughout the length of the same, and consequently the force required to further change their adjustment must be gradually increased, so that while it is possible with a slight pull on the stem to partially change the relation of the parts from the windingto the setting position, it requires a much greater force to completely effect the setting adjustment. As a result, it many times happens that the stem is pulled outwardly to such an extent that the clutch will be moved intermediate of the winding and setting pinions, and without contacting with either, so that upon a turn or partial rotation of the crown to which the stem is attached, the movement is neither wound nor set.

In order to overcome these objections, I

Specification of Letters Patent.

Application filed. December 8, 1911.

Patented June 11, 1912.

Serial No. 6%,584.

have so constructed and arranged the mech anism that the hardest part of the pull is required to first move the several parts, after which they readily yield and move to a slight pull on the stem, so that instead of a gradually increasing force being necessary to change from the winding to the set-ting position, a gradually decreasing force is required. This construction is clearly shown in the accompanying drawings, wherein,

Figure 1 is a view in side elevation of a part of a watch movement constructed in accorcance with my invention, the several parts being shown in their winding adjustment; Fig. 2 is a similar view thereof, the parts being shown in their setting adjustment.

Referring to these drawings, 5 represents a watch case of any desired construction, and 6 a dial plate secured therein in the usual way. Through the case 5 extends the winding stem 7, having mounted thereon the winding pinion 8, and the clutch 9, the

latter having a squared opening therein through which passes the squared portion 10 of the stem, in order that said clutch may be rotated therewith. This clutch, as usual, is provided with teeth on its upper and lower edges to mesh with those on the winding pinion 8 and setting pinion 11, when in its raised and lowered positions respectively. Pivoted at 13 to the dial plate 6 is the pendant lever 12, the long arm 1 1 thereof engaging with the winding stem 7 in the usual way, and the short arm 15 provided with the inclined face 16. This leveris adapted to engage with a spring-detent 17 secured at one end to the dial plate by means of the screw 18, the opposite end being provided with a catch 19 provided with two difierently inclined faces, viz., 20 and 21, the former being somewhat shorter in length, and adapted, when the part-s are in the winding position to lie substantially parallel and contact with the inclined face 16 on the short arm 15 of the lever 12 as indicated in Fig. 1. The enlarged end 19 of the spring-detent 17 is arranged to bear upon or against a spring member 22, one end of the latter being secured by the screw 23 to the dial plate 6, the opposite end being adapted to fit in an annular groove or recess 24 formed in the clutch 9, the tendency of said spring 22 being to retain said clutch in its raised position, that is, a position wherein the ratchet teeth on its upper edge will mesh with those on the winding pinion 8.

From the foregoing it will be understood that when the parts are in the adjustment as illustrated in Fig. 1, the inclined face 16 on the short arm of the lever 12 will engage with the inclined face 20 of the spring-detent 17, the extent of the contacting surfaces being sufficient to lock the several parts in their relative winding positions. As these contacting faces are approximately parallel, considerable pull on the winding stem 7 is required to force the springdetent downwardly, but as the inclined face 20 is a relatively short or smaller one, it follows that the same force is not required to change the position of the parts as is necessary in former constructions, wherein the entire height or length of the locking faces is brought into parallel and contacting positions. Again, after the enlarged end 19 has been slightly lowered, that is, to the extent of the length or height of the inclined face 20, the extreme end of the short arm 15 of the lever 12 will then easily ride up the longer inclined face 21 of the spring-detent 17 until it rests upon the upper edge of the enlarged end 19, in which position, of course, the clutch 9 will engage with the setting pinion 11, as illustrated in Fig. 2. By a slight push on the winding stem 7, the longer arm 14: of the lever will be lowered and the shorter arm 15 raised, thereby permitting the parts to again assume the positions as illustrated in Fig. 1.

From the foregoing description it will be seen that in the operation of changing the relative positions of the several parts from the winding to the setting adjustment, the greatest effort will be necessary at the beginning of the pull on the winding stem, that is, until the inclined face 16 on the short arm 15 of the lever 12 rides up to the beginning of the incline of the face 21 on the spring-detent, after which but slight efiort is required to complete the change in the positions of the parts to occupy those of the setting adjustment, as illustrated in Fig. 2; whereas in the mechanism as now ordinarily constructed, the reverse is true, the greater effort to change the adjustment from the winding to the setting position being required after the several parts have started to change their relative positions, that is, the force exerted must be constantly increased as the several parts approach their final setting positions.

I claim:

1. In a watch movement, the combination with a dial plate, of a winding stem having a clutch mounted thereon adapted to move on said stem and rotate therewith, a pendant lever pivoted at one end to the dial plate and engaging with said winding stem, a spring detent secured at one end to said dial plate and provided with a catch at its opposite end, said latter end being formed with two differently inclined faces along which successively is adapted to travel one end of said pendant lever to a final locking position, and a spring-member secured at one end to said dial plate engaging with said clutch at its opposite end and operated by said detent, substantially as described.

2. A watch movement comprising in part a pendant lever, and a spring member secured at one end and provided wit-h a catch at its opposite end, said catch being provided with difi'erently inclined faces along which successively is adapted to travel one end of said pendant lever to a final locking face beyond said inclined faces and at an incline to the latter.

Signed at Waltham, in the county of Middlesex, and State of Massachusetts, this 5th day of December, A. D. 1911.

JOSEPH A. FREUND.

WVitnesses W. G. Coon, J. L. KEENAN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

' Washington, D. 0.

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