KBK update for Monday, 8th March

Some time ago I wondered why Licon Series 550 was advertised in 1970 with so many wires passing through the switch. The answer is surprisingly simple: wired inductive encoding, in which the encoding of each switch is defined by which bit lines are passed through the ferrite cores. This seemingly short-lived idea may well have been unique to Licon; it seems that PCB-based encoding soon replaced it.

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