KBK update for Tuesday, 24th August

Universal Technology is another of those highly obscure switch manufacturers, discovered by way of a single un-illustrated advertisement for their MOD 220 coding switches. Indications go that they were in business for at least seven years, but as with so many other brands of the time, nothing that they produced has knowingly been discovered. MOD 220 is the second type discovered that provides a separate diode for each output bit, instead of separate switch contacts.

Unimax Switch Corp is even more obscure. With Universal Technology we have not just the series name but also the relevant patents. For Unimax Switch, there is nothing more than an advertisement for their product brochure. Their angle on the subject was a form of pulse output switch, an approach best known in the form of Micro Switch PB keyboard switches.

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