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 471
e springso slight thaT the pencil will immediately respond to any change of pressure in the cylinder.The spring is of unifiue and ingenious design, being made of a single piece of steel wire,wound from the middle into a double coil, the ends of which are screwed into a head Dwith four radial wings…
Mechanical engineering
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