Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts (1880)
D. Appleton and Company, Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 939
lance-staffs, pinion-leaves, etc. II. Clocks.—The term dug or clock originally meant thestroke of a hammer on a bell or gong, which gave out the timedetermined by the horologe or time-keeper; but at the presentday it is the generally accepted designation of all stationarytime-keepers, whether… … WATCHES AND CLOCKS. 905 state of rest by a finely coiled spring; or it may be a rod suspended by a delicate spring and aheavy bob at the bottom, and brought to rest by its own gravity. In either case the force applied isonly so much as is necessary to overcome the friction of the train, and keep…
Mechanical engineering -- Dictionaries
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