US1789043A - Timepiece - Google Patents

Description

G. JACOT TIMEPIECE Jan. 13, 1931.

Filed Feb. 10, 1950 INVENTORI Q Ja a W W AZTORNEY Patented Jan. 13, 1931 g 4 UNITED STATES enonens mcor, or GENE A, SWITZERLAND, ASSIGNOR T BULOVA WATCH COMPANY, 1

PATENT OFFICE INC., OF NEW YORK, N. Y.

v TIMEPIEGE Application filed February 10,1930, Serial No.

This invention relates to a timepiece wherein the mainspring is reenergized by means of a winding mechanism including an oscillating mass and its object is the provision of simple and reliable means whereby the oscillations of the mass are made ineffective when the mainspring is fully energized.

In the accompanying drawing, illustrating an embodiment of the invention,

Figure 1 is a plan view of the winding mechanism of the timepiece,

Figure 2 is a section taken on the line II-II of Figure 1. r

In Figure 1, 1 indicates the movement of the timepiece and 2 a-circular groove along which the mass 3 is adapted to oscillate. This mass is fixed on or integral-withan arm at. A toothed sector 6 is rotatably mounted on the shaft 7' of a ratchet wheel 8 and is adapted to be moved by a pinion 9 which is mounted on the arm l. A pawl 10 is supported on the sector 6 by means of a screw 11 so as to slide along an are shaped slot 12 provided on the sector. The pawl 10 cooperates with the teeth of the ratchet wheel 8 and is normally held at the upper end of the slot 12 by means of a spring 13 mounted on the sector 6. A second spring 1-1 maintains the pawl 10 in constant engagement with the teeth of the, ratchet wheel. The pinion 15 is mounted on the ratchet wheel and is gearedto the spring drum 16 by means of the two wheels 17.

The operation of the described mechanism is the following. a When the mass 3 swings in the direction of the arrow f, the pinion 9, turning in the same direction, drives the sector 6 in the direction of-the arrow 7. The pawl 10 is held in its position at the upper end of the slot 12by means of the spring 13 and acts upon the ratchet wheel 8 which winds the spring drum by the intermediary of the wheels 15 and 17.v

Then the mass swings in the direction opposite to the arrow 7, the sector 6 swings downwardly as seen in Figure 1 and the pawl 10 slides over the teeth of the ratchet wheel without turning the latter.

When the spring drum is wound up tight 427,301, and in Switzerland January 8, 1930.

the ratchet wheel is unable to turn and the Y the ratchet wheel and adapted to be moved by the oscillations of said mass, a, supporting member slidably engaging the pawl, and spring means interposed between the pawl and the supporting member, the tension of said means being such that normally the pawl is prevented to slide relative to its supporting member, but when said mainspring is wound up the pawl can slide relative to the supporting member against the action of said spring means.

mainspring winding timepiece mechanism comprising an oscillating mass, 7

a ratchet wheel operatively' connected with the mainspring, a toothed sector mounted on the axis of said ratchet wheel and adapted to be turned thereabout by the oscillationsof said mass, said sector being provided with an are shaped slot, a pawl mounted on said sector in slidable engagement with said slot, and spring means interposed between said sector and said pawl and normally holding the pawl at one end of the slot, but when the nainspring is wound up permitting a sliding movement of the pawl relative to the sector.

In testimony ture.

GEORGES J AGOT.

whereof I afiiX my signa-

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