Motion picture projection : an elementary text book (1928)

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MOTION PICTURE PROJECTION 943 Tighten socket clamp ring (N-5) by screwing up the clamping screws (N-2) thereby locking the lamp in position in the socket. Gently screw up bottom center socket contact (N-4) against the lamp so as to insure good contact. Open lamp setter gate (M-3) and unscrew the knurled adjusting screws (M-l and M-2) until Fig. 405 Parts of Type H.D.S., Form E, A. C. Regulator they do not touch the lamp. Check the lateral adjustment through the sighting holes (M-6) and, if found to be slightly wrong, correct by screwing or unscrewing the large nickel adjusting screw (N-l) on the socket (N) . This precaution is very important. The socket with its lamp may now be taken out of the lamp setter with the assurance that the lamp will always be in correct position for pro