I think Bjarney nailed it. Sounds like Touch-Plate to me.
G.E. made a similar low voltage Residential control which I had dealt with in 1984. It was new then, and maybe that line was circa 1978 +, but it worked about the same as touchplate.
Master control panel(or panels), remotes, single momentary N.O. switches, latching contactors, yadda,yadda,yadda.
Worst part is the transformers are always in the hottest part of an attic!
My Father used to complain endlessly about shooting trouble on a touchplate control system - due to the placement of mechanical items and transformers (i.e. in hard to access places!).
Seems like the contactors were prone to errors.
Scott35 S.E.T.
