Screw contact switch
 A switch assembly connectible to a circuit board comprises PA1 A. an insulative strip containing first, second and third openings spaced apart in a row, PA1 B. two electrically conductive metallic prongs respectively extending through the strip via the first and third openings, and PA1 C. a fastener having a threaded shank extending into the strip via the second opening and having an electrically conductive head adapted to engage or disengage both prongs at one side of the strip depending on the extent of rotation of the shank relative to the strip. 
The Anaconda Company
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Richard B.
Walker