Dodge, Mary Mapes, 1830-1905 · [New York : Scribner & Co.] · leaf 103
THE MACHINERY OF A WATCH The power to keep in motion the machinery of awatch is supplied by the mainspring. In windinga watch, this spring is coiled in the central partof its holder, known as a barrel. The main-spring in its constant endeavor to uncoil turnsthis barrel in one direction, and its… … »¥* THE MAINSPRING, COILED IN THE BARREL, IS THE POWER THAT DRIVES THE WATCH. (Magnified abuut five times.) The motion is prevented from being too fast bywhat is known as an escape-wheel, the cogs ofwhich work in connection with the pallet andfork. This lets the motion escape in a seriesof short…
Children's literature
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