[GreenKeys] Motor Start Control ?

[John P. Caldwell]

I came across a couple of what appear to be motor start controls in a box of
RTTY parts I picked up at a hamfest recently.  These are marked MULTIPLEX
COMMUNICATIONS INC, Long Island, NY, Model MC110.  There's a barrier strip
w/ contacts for Line +/- , Selector 1 & 2 and a switched 1/6A 120V outlet.
The units are marked 5 Minute Delay, which I take to mean when the line
contacts go hot, the timer starts.  My assumption is teleprinter in series
with the box would then power up and remain so for the 5 minute duration,
ready to receive a message?.  A google search yielded nothing

 

Does anyone have any info on these units?

 

Regards,

John WD8INC

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