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 873
den base encloses the magnets. At the lower endis a rack and pinion by which these can be adjusted with reference to the diaphragm. Tothe center of the latter there is attached a sjrew-threaded pin with thumb-nut and binder atthe top. and encircling the pin loosely is a split-hardened steel ring… … TELEGRAPH. 843
Mechanical engineering
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