Switch interface method and apparatus

Communications: electrical – Continuously variable indicating – With meter reading

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Details

340518, 340825100, 340825570, 370 48, H04Q 900, H04Q 139, H04J 306

Patent

active

047680300

ABSTRACT:
An interface for generating a serial bit stream corresponding to one or more switch settings and transmitting that bit stream to a polling circuit. Four parallel bits representing a setting of a decimal switch are converted to serial bit sequence. This sequence is preceded by a start bit and followed by an extended stop bit. In an embodiment where multiple switches are polled, the data sequence is followed by a switch designating sequence and then the extended stop bit.

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GB 2054225A, J. William McNamee, et al., Feb. 1981.

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