KBK update for Saturday, 5th October

I discovered on Friday that, in July, Bitsavers scanned in a guide to keyboard technology, published by Electronic Engineer magazine in 1971 in conjunction with Micro Switch. This guide has some interesting definitions of switch types.

Depicted in that document is a mercury switch, that is clearly a Mercutronic type from Mechanical Enterprises. After discovering that the all the archive scans of Electronics Australia were removed from americanradiohistory.com for copyright reasons, I went looking to see where it had gone, and found one more mention of Mercutron(ic)¹ that I missed: a depiction in Computerworld—also from 1971—of the exact same switch (complete with the external return spring and base missing from the other diagram), along with its model: MC-210. This implies MC series.

¹ both “Mercutron” and “Mercutronic” can appear together …

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