Richardson's handbook of projection (1930)

MANAGERS AND PROJECTIONISTS What will be the effect if the loops be not set exactly right ? 1053 Using Fig. 392, explain why it is necessary that the loops be set exactly right ? 1054 What is the exact distance between the center of the picture aperture and sound aperture of a projector, along the correct film path ? < 1054 Using Western Electric equipment, explain how you would set the loops the correct size 1056 Is there a difference in threading requirements with different types of apparatus ? . 1056 Where may you obtain correct instructions for threading sound film in any type of apparatus?... 1056 Will an error in loop setting of even so little as one sprocket hole injure synchronism ? 1056 Sound Gate What is the "sound gate" ? 1049 What trouble may occur at the sound gate of certain types of installation ? 1049 With apparatus in which deposit may occur on the sound gate film track, what attention is imperatively necessary at each threading of the projector?.... 1050 How should deposit be removed from the sound gate track and what damage may wrong procedure . in this respect cause ? 1050 How often should the projectionist examine the entire film track from upper to lower magazine?.. 1050 Just what should be examined with relation to the film track through the projector? 1050 Sound Gate Aperture What attention should it have ? 1051 Should you start the projector and find you have failed to close the sound gate, what would you do? 1060 Pick-Up Optical System What attention should be given the pick-up optical system each day ? 1052 The Fader What is the Western Electric fader? 1115 Describe the arrangement of the fader elements 1115 Why cannot a variable resistance be used in series with the pick-up and main amplifier? 1118 Where is the fader located? 1118 Explain the location of each half of the coils 1120 What are the switches at the top of the fader for?.. 1122 xxvii