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 860
entirely removes thestrain and jar of the operating parts from the electro-magnet, and reduces the friction in its armature bar toa very trifling amount, thus insuring great freedom in itsaction. On the main spindle of the machines a threadof a very fine pitch is cut where it projects through… … 7) Fig. 8.—Union signal. Mechanism.
Mechanical engineering
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