contact-makern. a contrivance for completing an electric circuit automatically.
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the world > matter > physics > electromagnetic radiation > electricity > circuit > [noun] > complete circuit or path > device completing
contact-maker1886
1886 Pall Mall Gaz. 25 Aug. 14/1 There are in each compartment two incandescent 16-candle power lamps. By the application of a contact maker, only one is lit at a time.