Hi Corby:
The clocks were on a synchronization line in series and the source power
supply was 200 VDC. A high power adjustable series resistor was in
series to set the loop current. The loop was closed one second prior to
top of the hour and opened at the top of the hour. The reason for the
high voltage is that the time constant is L/R so the higher the R the
faster is the circuit. This is exactly the same as how Teletype
machines are able to operate. You can use a bench power supply in
constant current mode and just turn up the current until the
synchronizer pulls in and not the voltage across it. See:
http://www.prc68.com/I/SWCC.shtml
http://www.prc68.com/I/SWCC2.shtml
Have Fun,
Brooke Clarke
http://www.PRC68.com
Corby Dawson wrote:
Hi,
I picked up a nice big clock that has "self winding clock co. New York"
and "western union" on the face.
After some research on the web I connected a 3V battery up and it wound
itself OK.
Fiddled with the orientation a bit to get the pendulum swing balanced and
it seems to be running OK now.
How to I advance or retard the hands to set the time?
Also how do I test the synchronizer?
I see two Fahnestock clips That look to connect to the synchronizer
solenoid.
With an appropriate interface can I synchronize it to a GPS 1PPH?
Thanks,
Corby Dawson
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