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Old 5th May 2021, 10:31 pm   #5
Dave Moll
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Join Date: Feb 2005
Location: West Cumbria (CA13), UK
Posts: 6,118
Default Re: IBM Factory Clock

I agree that it would be a great shame to replace its mechanism with a quartz movement - assuming that the impulse-driven mechanism is in (or can be brought to) working order.

Presumably the first thing to discover is what voltage is required, though I suppose this could be determined experimentally by starting at the bottom and working up until a response is achieved. I assume that manually pulsing using a battery making momentary contact across the pulsing terminals should a) determine whether it's working and b) how far the hands move and therefore the pulsing interval needed (most likely 30 seconds). Interesting, however, that there are three wires - though maybe this is obvious to those familiar with pulse clocks (which I'm not).
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