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全部拍賣 / Nautica, Technica & Optic / C.F. Palmer of London electro-mechanical time/signal switch,...
C.F. Palmer of London electro-mechanical time/signal switch, circa 1940s, 4.5" square ** A pair of electrical contacts connected to the pallets of the spring driven thirty hour pin pallet movement energises a coil, advancing a drum once per second. This action is the same mechanism as in a Synchronome slave clock. The drum is fitted with projecting nibs which operate contacts to provide outputs at one second, ten second or one minute intervals ** From the David Read Collection
估價:$52.87
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