F. H. Richardson's bluebook of projection (1935)

Page scan 000689 from F. H. Richardson's bluebook of projection

Record Details:

Title:
F. H. Richardson's bluebook of projection
Date:
1935
Publisher:
New York : Quigley Publishing Company, Inc.
Volume:
F. H. Richardson's bluebook of projection
Leaf #:
000689
Language:
English
Subjects:
Motion Pictures, Motion Picture Technology
Collection:
Books
Format:
Books
Contributor:
Media History Digital Library
Sponsor:
{"Media History Digital Library","Jeff Joseph"}
Coordinator:
Media History Digital Library
Description:
Date Added:
August 01, 2024
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DEFINITIONS 671 Conjugate United in pairs. Coupled. Yoked together. Conjugate Foci Two foci points yoked together and controlled by a lens. Converter A machine in which mechanical rotation is employed to effect certain changes in electric energy. It may be used to (a) change the voltage, (b) change a.c. to d.c. or vice versa; (c) alter the phase of a.c. or (d) alter the frequency of a.c. Coulomb Unity of volume. Is equal to the amount, volume or quantity of electricity delivered by one ampere of current during one second of time. Crater Angle Angle the-crater an electric arc light source makes with the optical axis of the projector lens system, or with the optical axis of a mirror collector. Cycle A series of operations occurring at regular intervals, as, for example, reversals of direction in a.c. Decibel Unit of measurement for gain and loss of energy in sound. Dielectric The insulation medium of an electric condenser. Dimmer An adjustable rheostat employed for raising or lowering the luminosity of circuits of incandescent lamps.