Hi Hal:
I think there were a number of slave clock systems and some of them could do DST/ST changes and/or catch up from a power
failure.
That very well might have been what you heard.
To me the winding sounds like a muffled air compressor.
The setting sounds like Thunk.
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Hal Murray wrote:
[email protected] said:
The click-click-click... is the self winding. A solenoid vibrates back and
forth and a pawl and ratchet winds the main spring.
I don't think that's what I was referring to. It was a long time ago so my
memory may be buggy.
The click-click-click... that I remember was loud enough to distract the
class. It only happened occasionally, ballpark of once per month or less.
The minute hand was making a step with each click.
I assumed there was some mechanism to remotely set the clock. I think it
ended up roughly correct. (I didn't even have a watch back then.)
Was there any alternative to SWCC technology in the 1950s time frame?
There's a heart shaped cam that forces the hour, minute and if the clock has
one the second hand to 12:00 and holds them there until the sync pulse goes
away. Note the second hand only was used on clocks in radio stations so they
could join the network. For that 1 second was close enough.
Is that one cam that gets all the hands or a separate cam for each hand?
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