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 862
arily closed, thereby releasing one portion of thelock on the back of the switch roller. Upon the com-pletion of the movement of the switch the indicationcircuit is again broken, and permits the operator to com-plete the throw of the switch lever. The only communi-cation between the tower and the… … 832 TABULATING MACHINE.
Mechanical engineering
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