Hawkins electrical guide ... : questions, answers & illustrations : a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications ; a practical treatise (1914)
Hawkins, N. (Nehemiah), 1833-1928 · New York : T. Audel & Co. · leaf 75
ket wheel F, towhich it is kept by the roller E. The film forms a loop at H2 and passesdownward through the guide grooves made in the gate G. MOTION PICTURES 2,729 Continuing, it passes out past the bottom of the gate, forming a secondloop H3, and then passes between a spring roller I and sprocket… … Figs. 3,889 to 3,891.—Schneider motionpicture camera. Case of mahogany.The film engaging device is a recipro-cating double pin movement. The filmbed is covered with antiseptic velvetribbon, also the aluminum film pressuredoor which is adjustable to any desiredpressure. Two film retorts are…
Electrical engineering
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