Richardson's handbook of projection (1927)

Record Details:

Title:
Richardson's handbook of projection
Date:
1927
Publisher:
New York : Chalmers Publishing Company
Volume:
Richardson's handbook of projection
Leaf #:
000351
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 01, 2024
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MANAGERS AND PROJECTIONISTS 799 HT-44 HT-46 Bi HT-23 HT-213 JL ^t"2I3BP Figure 304 by means of flexible metal ribbon conductors HT-50 Fig. 305, which are attached to the contact blocks by means of wedge-shaped clamping blocks, Fig. HT-52 A Fig. 305, secured by screws HT-52 S Fig. 305. To prevent rapid deterioration .of the contact blocks from the high temperature of the arc, the lamp is provided with metal baffle plate, HT-213 BP Fig. 304, which is held in place by machine screws (two of them), HT-213 S. The baffle plate attaches to the two metal studs which extend out from asbestos guide plate HT-213 Fig. 304, which same support the positive contact arms. The baffle plate is of special heat resisting metal. It has been found that after two hours of continuous operation, while the baffle plate became red hot, the contact block tern* perature was well within the limits of safety from damage by heat. Another important improvement is the change in motor location. It now is mounted on the base plate of the lamp, where it is accessible for oiling, etc. The positive friction clutch has been located above the base plate, C-l Fig. 304, where it is more accessible than formerly for adjustment. The positive and negative feed shafts have been so arranged that the drive on the negative shaft is parallel with the face and