| 摘要 |
TIMED TELEPHONE SWITCH DEVICE A timed telephone switch device for a telephone wired to a telephone system circuit by at least a pair of wires, one of said wires being supplied with voltage. The timed telephone switch device includes a clock that may be set to predetermined times. A switch is connected to the voltage supplied wire in order to switch between connection and disconnection from the telephone system circuit, the switch being operably engaged with the clock so that the telephone will be disconnected from the telephone system circuit and connected to the telephone system circuit at predetermined times.
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