Handbook of projection for theatre managers and motion picture projectionists ([1922])

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HANDBOOK OF PROJECTION FOR Crater Angle 405 Maintaining Crater Angle 408 How to Find Correct Angle „ 409 License, Projectionists Also see "Examination" general remarks concerning same, 884 Mazda Projection Mazda Lamp Proj ection 815 Advantages of Mazda Lamp Projection 842 to 852 General Remarks 815 to 817 The Lamp 817 How Light Source Is Made Up 818 Short Circuiting in Coils 819 Blackening of Bulb and Its Effect 821 Quality of Light 822 Large and Small Diameter Lenses and the Effect... 823 Relative Light Transmitting Power of Large and Small Diameter Projection Lenses 825 Current Control Apparatus 826 and 855 Synchronous Converter 831 Rheostatic Control 832 Using Lamp Setter 833 Importance of Filament Alignment 836 To Adjust Lamp Filament on Optical Axis 837 Piano-Convex Condensing System 852 to 868 Advantages of Piano-Convex System 854 Focusing Mirror Image, Piano-Convex System.... 867 Focal Distances, Piano-Convex System 866 Mercury Arc Rectifiers Principle of Operation 515 How Bulb Is Started 516 Installation 517 General Electric Rectifier 518 to 530 Old Style General Electric Rectifier 531 to 534 Trouble Chart 533 Westinghouse Rectifier 534 to 543 Motor Generators Also see Current Rectification Motor Generator — What It Is 443 General Instructions Applying to All Motor Generator Sets 444 to 461 Location of Set . 444