| 摘要 |
1,027,842. Ratchet gearing. INSTITUT DR. ING REINHARD STRAUMANN A.G. Jan. 30, 1963 [Jan. 31, 1962], No. 3782/63. Heading F2Q. [Also in Division H2] Oscillatory or reciprocatory motion is converted into rotary motion by a pair of pawls 41, 42 which act alternately on a ratchet wheel 54, electrically excited oscillatory means having two oscillating free end portions each carrying one of the pawls moving the pawls in unison with each other but in opposite directions relative to the ratchet teeth, the tooth spacing Z, the distance B measured circumferentially between the two pawls, and the amplitude A of oscillation from a rest position for each pawl being related thus:- and B = (n +α)Z, where n = 0 or a whole number, and 0<α<1 As shown, the pawls 41, 42 are mounted on the free ends of piezo-electric crystals or rods 43, 44 of piezo-ceramic material excited by a common alternating current supply 45. Alternatively, the pawls may be mounted on two arms of an electronically maintained tuning fork (Fig. 1, not shown), on the free ends of bimetallic magnetostrictive elements 63, 64 (Fig. 3, not shown), or on the free ends of oscillating reeds 73, 74, each of which forms with a fixed plate 75, 76, a capacitor (Fig. 4, not shown). A frequency range for the A.C. supply of 50- 1000 c/s. is mentioned, but a value as low as 1 c/s. may be used. |
