Servicing projection equipment (1932)

Page scan 00045 from Servicing projection equipment

Record Details:

Title:
Servicing projection equipment
Date:
1932
Publisher:
New York : Mancall Publishing Corp.
Volume:
Servicing projection equipment
Leaf #:
00045
Language:
English
Subjects:
Motion Pictures, Motion Picture Technology
Collection:
Books
Format:
Books
Contributor:
Media History Digital Library
Sponsor:
Media History Digital Library
Coordinator:
Media History Digital Library
Description:
Date Added:
August 15, 2024
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LAMP MECHANISM 29 governor engages and disengages the feeding mechanism. A knob or nut is provided for adjusting the spring that controls the feeding time. First get the arc at the best operating point by hand regulation, then adjust the knob on the dial with the pointer so that this arc length is maintained. Xote: With this, as with other devices, it is a good plan to keep a tabulated check (over a period of time), on the settings that give the desired arc with the various line voltages that usually occur in your particular case. With this at hand you can always re-set quickly to cover such changes as are likely to come up in daily conditions. Warning: Controller motors are invariably D. C. If, in an emergency, you change to A. C, do not use the controller motor. In that case disconnect the lead, or other contact, from the motor to the device and feed by hand ichile using A. C. 6. With Peerless Automatic Same Applies to Motor Relay Types (a) — The arc voltage governs the strength of the magnetic pull which gives contact in the relay to start the motor. The spring acts against this pull to open the motor circuit. By adjusting the spring tension, the instant of feed and stop can be regulated in this type. By such adjustment you regulate the arc length, and hence the arc voltage and the