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1954-55 Theatre Catalog, 12th Edition, Page 293 (257)

1954-55 Theatre Catalog, 12th Edition
1954-55 Theatre Catalog
1954-55 Theatre Catalog, 12th Edition, Page 293
Page 293

1954-55 Theatre Catalog, 12th Edition, Page 293

THE Ashcrait Super Power will fit any of the modern type standard make projection machines.

above the arc fiame. This keeps both the redector and the inside of the lamp free of combustion dust. A series of screened ventilating holes in the lamphouse base suck in cool air which instantly forces out heat, dust, and ash without interference with the arc fiame stability.

Convenient dowser control handles are provided on both sides of the lamp at the end toward the screen. Horizontal and vertical carbon adjustments are located on the rear of the lamp. Simple adjustment knobs permit accurate vertical and lateral positioning of the refiector.

Two new motor generators to power the Wide-Arc lamp were also announced by RCA. They are the Type 19 motor generator for use on a 208-volt line, and the Type 20 for operation on a 220-volt line, Both provide 125/250 ampere, 90 volt output.



The Ashcraft Super-Power is the result of 35 years of experience in research and design of arc projectors. The lamp will fit any of the modern types of standard make projection machines. The alignment of the optical system of the lamphouse with the aperture and lens of the projector is of utmost importance. This is particularly so \x'heni-ru'Sed With the high speed f 1.9 or f 2.0 projection lenses"

When the Super-Power Lamp is installed in indoor theatres the distance from the silvered surface of the refiector to the aperture is to be 37% inches. This distance is best for projecting light with maximum illumination together with maximum distribution.

When the lamp is used in drivelin theatres, the manufacturer recommends a distance from the silvered surface of the reiiector to the aperture iof 36 inches. This distance is recommended for the reason that slightly more light will be projected, but with a slight lessening of distribution,

In the absence of aligning tools a simpler, but less exact method is to use a full 36 inch length of straight drill rod passed through the water jacket, the rotating head, and center of the aperture. The rod should then extend through into the lens mount, and if the alignment is correct, the end of the rod will be in the center of the, lens mount. Of course, this is not an exact method of alignment. For this purpose, when a 10mm carbon is to be used, a 13/32 inch diameter drill rod should be used; for the 9mm, the diameter should be 11/32-inches.

Water Supply

The preferred method 'of supplying water for the AG contact head is by means of the Asheraft Water Circulator. The two "siX" foot "hoses supplied with the lamp arelto be connected to

m [NIBEIOE View okthmlamphouse she ng large. high speed reflector. Note unobstructed amp door.


the supply and return connections. It makes no difference which hose is connected to either connection.

The two wires, with terminals, extending from the flexible metal tubing, are to be connected to the lamphouse (or lamphouse switch) terminals, so that the circulator motor will start as soon as the main DC circuit to the lamphouse is closed. Polarity of the motor terminals may be disregarded, as the motor rotates in only one direction regardless of which terminal is connected to the positive lamphouse terminal stud,

The reservoir or tank should be filled to within one inch of the top with water.

As a precaution, if local water contains a high percentage of alkali, then distilled water should be used.

One and one-half pints of water per minute is the normal fion required, slightly less than this amount is adequate, but any amount over one pint is necessary.

Should the water supply fail during operation, no great damage will result, however, the chromium plating on the jacket may be damaged. It is recommended that after such failure the contacts be inspected for pitted or corroded surfaces: and carefully cleaned with a fine carborundum cloth. '
1954-55 Theatre Catalog, 12th Edition, Page 293