We use Optical Character Recognition (OCR) during our scanning and processing workflow to make the content of each page searchable. You can view the automatically generated text below as well as copy and paste individual pieces of text to quote in your own work.
Text recognition is never 100% accurate. Many parts of the scanned page may not be reflected in the OCR text output, including: images, page layout, certain fonts or handwriting.
MANAGERS AND PROJECTIONISTS 739
Motiograph De Luxe Model
THE Motiograph, De Luxe Model, has a lamphouse of ample dimensions. At the time this work goes to press there is a lamphouse and lamp of heavier construction in process of making. The present lamphouse (1921) is illustrated in Fig. 274 A. The metal is of heavy Russian iron. Doors are double walled, with a 5/8 inch ventilated air space between. Top has a vent for attaching to a pipe leading to open air or projection room vent flue. Dimensions are, front to back 16.5 inches, Fig. 274 A, with a recess under the condenser, which allows of bringing the arc very close to condenser. In effect it adds 2% inches to length of lamphouse. Floor to top of gable is 28 inches.
The condenser casing is so arranged that the projectionist has easy access for replacement or cleaning. The condenser lenses are held in metal rings which are calculated to equalize expansion and contraction of thin edge and thick center of lenses, which to an extent controls breakage. There is means provided for altering distance between collector and converging condenser lenses at will. The dowser is an "outside" one. Maximum possible distance obtainable between center of condenser and aperture 21 inches; minimum distance 13 inches. Minimum distance crater may be placed from face of collector lens when lamp is at ordinary working angle, 2% inches.
The arc lamp wire terminal clamps are shown in Fig. 274 B, details of the clamp being clearly shown in the picture. The carbon clamps are made of a fine grade of gray iron. They have a plunger of steel. The gripping surface is sufficient to insure good contact between clamp and carbon.
USEFUL DATA. — The following tabulation shows necessary distance of center of Motiograph De Luxe model pedestal from wall when projector is set at different angles, allowing a five inch clearance between upper magazine and wall at all angles. In this you will of course understand that as the projector is tilted at an angle the upper magazine is moved forward toward the wall, therefore the base must be moved Lack correspondingly. These figures will be of use in determining the position of the wire outlets and front to back length of the room when same are being planned.