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16 MOTION PICTURE PROJECTION
CIRCUIT-CLOSED. A circuit closed so as to give the current a continuous path.
CIRCUIT, OPEN. A circuit with its continuity broken, as by the opening of a switch.
CLOSE-UP. Scene or action taken with the character close to the camera.
COLLODION. A solution of pyroxylin (soluble gun cotton) in ether. Used in film cement.
COMMUTATOR. That part of a dynamo that changes the direction of the currents.
COOLING PLATE. The plate around the film aperture on gate which protects the gate itself from getting overheated from the rays of light from arc lamp.
CONDUCTOR. Anything that will permit the passage of electricity. A wire.
CONDENSERS. A lens or set of lenses used to gather the rays of light from the arc lamp and bring them to a fixed point of focus on aperture in gate.
The lens combination which deflects the diverging rays of the luminant into the objective.
Collector Lens. The lens next to the source of light. Converging Lens. The lens nearest the objective. Middle Lens. Of a three-lens combination, the lens lying
between the collector lens and the converging lens.
CONDUIT. A metal pipe through which electrical conductors are run.
CONTACT, ELECTRIC. A contact between two conductors giving a continuous path for the current.
CONSTANT LOAD. A load whose pressure is steady and invariable.
CONTINUOUS. Uninterrupted without break, or interruption.
CONVERTER. An electric machine or apparatus for changing the potential difference of an electrical circuit.
CORROSION. Chemical action which causes destruction of a metal, usually by oxidation or rusting.
CORRUGATED. Formed with a surface consisting of alternate valleys and ridges.
COULOMB. The practical unit of quantity of electricity. It is the quantity passed by a current of one ampere intensity in one second.
CRATER. The depression that forms in the positive carbon of a voltaic arc.