| 摘要 |
1,020,040. Automatic speed control. ELEKTROCAS NARODNI PODNIK. Feb. 6, 1963 [Feb. 7, 1962], No. 4861/63. Heading G3R. [Also in Division H3] An oscillator drives through a synchronous motor 10 and gearing one side 15 of a differential gear, the other side 4 being driven at constant speed, controlled by a balance wheel or pendulum escapement 1, so that any error in oscillator frequency or motor speed varies the angular position of the differential gear planet wheel 16 and through a ferro-magnetic link 18 the magnetic reluctance of an inductor core 19 determining the oscillator frequency, to correct its frequency. Alternatively the LC oscillator tuned circuit capacitance can be controlled, or the resistance or capacitance of an RC oscillator. The motor 10 also winds up a coil spring 7 driving the constant speed side of the differential gear, and as both drives to the latter from the motor have equal transmission ratios the spring 7 acts also as a clutch. Different frequencies and speeds may be stabilized, by adjusting a regulator arm 2 of the escapement. The motor 10 may drive the hands of a clock or, through cams, produce master pulses controlling distant clocks.
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