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THE PROJECTOR 205
71. What is the relation between intermittent speed and the light that is allowed to pass by the rotating shutter?
72. What are the limiting factors in intermittent speed?
The Modern Rotating Shutter, page 228
73. Did the old type of rotating shutter have any effect on the heat applied to the film?
74. What damage did the high temperature at the aperture do?
The Disc Type Rear Shutter, page 228
75. How far is the rear shutter located from the aperture?
76. What is the relation of the rotary speed of the master blade edges to the distance between the shutter shaft and the center of the light beam ?
77. Though the time interval of cutting the beam is short why is its effect considerable ?
78. May either blade of most disc type rear shutters be used as the master blade ?
79. Do rear shutters create an air current at the aperture and thereby reduce aperture temperature?
The Horizontal, Cylindrical Type Shutter, page 230
80. Describe the horizontal cylinder type rotating shutter.
81. Describe the location and housing of the horizontal, cylindrical type shutter.
82. Why does the ratio between width and speed of the disc type shutter blades not apply to the Motiograph shutter?
83. Does either blade of the Motiograph shutter act as both) master and cut-off blade?
84. How does the Motiograph shutter create air currents at the aperture ?
85. In which direction does the Motiograph shutter move the
air?
Regulating the Front Shutter, page 231
86. What is meant by "point of aerial image" ?