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 #:
000493
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:
September 28, 2023
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MANAGERS AND PROJECTIONISTS 941 Figure 366 LOCATING THE LAMP FILAMENT IMAGE.— In center of dowser of lamphouse there is a pin hole. Light the lamp and unlock mirror by turning knob D, Fig. 366, to left and swing mirror over by means of knob C, Fig. 366. The image of the lamp filament is now seen. This filament image should now be centered on the automatic fire shutter. When this is accomplished the image will appear as indicated on Fig. 367, A. The image fairly filling the opening of the cooling plate, it will be noted that dark spaces remain between the filament coils as on A, Fig. 367. NOTICE. — If it is desired to move the lamp toward you it is only necessary to turn knob F to the right, but if you wish to move the lamp from you, you must turn knob F to the left, AND AT THE SAME TIME SHOVE THE LAMP HOLDER IN. This is because the threads on threaded collar U, Fig. 365, engage with threads in part S. Fig. 365, while collar U merely butts up against the end of lug Y, hence turning knob F to the right will pull the lamp back, turning it to the left will have no effect, unless you shove in on the holder at the same time. Examine the parts and you will see how it works.