Vacuum wound vehicle clock |
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| 申请号 | US2734337D | 申请日 | 公开(公告)号 | US2734337A | 公开(公告)日 | 1956-02-14 | |
| 申请人 | 发明人 | ||||||
| 摘要 | 726,005. Clocks. GENERAL MOTORS CORPORATION. May 11, 1953 [May 21, 1952], No. 13011/53. Class 139. A winding mechanism for a spring-driven clock comprises a flexible diaphragm mounted in a chamber connectible to a source of repeated suction impulses, such as the intake manifold of an internal combustion engine, deformable in one direction by said impulses against a return spring, and connected to one arm of a bell crank pivoted about an axis substantially parallel to the plane of the diaphragm, the other arm of the bell crank being connected to a member which is pivoted about the axis, normal to the bell crank pivot, of a ratchet wheel connected to the winding spindle of the clock and which carries a pawl for engagement of the ratchet wheel to transmit return movements of the diaphragm to apply a winding force to the spindle. The source of suction impulses is connected to a coupling 42, Fig. 1, of a housing 36 containing a diaphragm 44 clamped at its periphery and carrying substantially flat discs 48, 50 on opposite sides. A rivet like member 52, fixed to the centre of the diaphragm, has an extension 70, Fig. 4, connected to one arm of a bell crank 62 pivoted on a bracket 60. The other arm 72 of the bell crank 62 engages an opening 76, Fig. 2, in one arm of a bell crank 74 pivoted on the winding spindle 28 of the barrel 24, Fig. 1. The other arm of the bell crank 74, Fig. 2, carries a pawl 78 spring-pressed into engagement with the teeth 31 of a ratchet 30 fixed to the spindle 28. The arrangement is such that as the diaphragm is returned to the left by a spring 58 the pawl 78 moves the ratchet 30 and its spindle 28 counter-clockwise to wind the mainspring. A pawl 80 prevents reverse rotation of the ratchet 30. The clock hands 6, 8, Fig. 1, are settable by a knob 16 with respect to the dial 10. The glass 12 is retained by a bezel 14. | ||||||
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