Test Panel at Standard Electric Time in Springfield, Mass., circa 1948. Photo courtesy of Jeffrey Wood.

The copper-clad Standard Electric tower clock in Springfield, Massachusetts.  Presently maintained by Jeffrey R. Wood.


Here's an AR-2 that was built and installed in 2000 in a movie theatre!  This clock system was custom made for that "retro" look.  Not bad, not bad at all!



Here's a 1940 AR 12-inch slave clock.  Notice the two magnets. Both run on 24VDC.  The "AR" clocks later became known as "AR-3" clocks, because they use three wires to run, two wires for normal minute impulses, and the third wire for the hourly correction impulse. On the other hand, the "AR-2" and "AR-2A" clocks use 2-wire for both minute and hourly impulses, the hourly correction impulse being at 48VDC instead of 24VDC.  I believe the AR-3 began production in 1932, and the AR-2 began production in 1948, with the AR-2A coming in the mid 50s.  Photo from Roger Carlson via an ebay auction.


Here's a 10-inch series clock from the early 1940s.  The series clocks were wired in series, had no correction and typically ran on batteries at about 1.8VDC 150mA.  Of course, the voltage of the transformer or batteries providing power varies depending on how many clocks are on the circuit.  This system is the original master/slave clock system that was made by Standard Electric.  Photo from an ebay auction.


More pictures coming soon!

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