Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics (1892)
Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 864
FiG 1 —Perspectue of circuit closing pre^s. … Fig. 3.—Dctnil of circuit-closing press. -actuated points, so hung as to drop exactlyinto the center of the lit-tie mercury cups below.These pins are so con-nected that when apunched card is laid onthe rubber plate againstthe guides or stops andthe box is brought down,all the pins that arestopped…
Mechanical engineering
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