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US5206891A Operational control counter circuitry for electrical apparatus 失效
电气设备操作控制计数器电路

Operational control counter circuitry for electrical apparatus
摘要:
An electrical apparatus (e.g., copying apparatus) equipped with a counter for counting the number of specific cycles. Allowance or prevention of an operation cycle is controlled in accordance with voltage changes at a predetermined position of the controlling circuitry supplying a driving voltage to the counter. A specific operation of the electrical apparatus is enabled by connection of counter.
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