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1953-54 Theatre Catalog, 11th Edition, Page 312 (276)

1953-54 Theatre Catalog, 11th Edition
1953-54 Theatre Catalog
1953-54 Theatre Catalog, 11th Edition, Page 312
Page 312

1953-54 Theatre Catalog, 11th Edition, Page 312

Model 403 utilizes full width of standard quarter-inch tape.

Arc Slide Proiecfor

The development of a new universal high intensity arc slide projector said to project pictures of a size and brilliancy comparable to large screen theatre projection, was recently announced by the Strong Electric Corporation.

Able to accommodate slides from two inches by two inches, to four inches by five inches, it is said to have many uses for drive-ins, TV and movie studios, and auditoriums. This high intensity arc projects a snow white light as compared to the yellow light of the Mazda, heretofore relied upon for slide projection. Said to be extremely simple to operate, any llfJ-volt A. C. convenient outlet is all that is needed to obtain a power supply.

The projector is '78 inches in length and adjustable legs permit establishment of the optical center at a height of from 36 inches to 56 inches. A projection angle of as much as 27 degrees downward, and of 10 degrees upward is afforded.

Hy-Arc Lamp

An economical new carbon-arc lamp engineered especially for indoor and medium size drive-ins is available from the RCA Victor Division, Radio Corporation of America.

The new lamp, designated the RCA lly-Arc, has a light output of approxie mately 18,000 lumens. ll operates with a 9mm by 20-inch high-intensity posi. tive carbon and a 5/1li-inch by 9-inch negative carbon at currents from 70 to 90 amperes. with low arc voltage for

reduced carbon consumption, it is claimed. The lamp has accessible controls for ease of operation.

Included among the new features of the lamp are provisions for magnetic stablization of the arc flames; a watercooled, non-rotating positive carbon; 21 large 15-inch high-speed reliector; an extra large interior for cool operation; and a construction affording maximum protection of all operating components from dirt, it is claimed. The doors are large, and expose a maximum of the interior of the lamphouse when raised. There are no obstructions on the door of the lamphouse. making it easy to keep the lamp clean.

Wide Screen Frame

An all-purpose curved, metal wide screen frame, adaptable to any size theatre, has been developed by the Drive-In Theatre Manufacturing Coinpany.

The metal uSed in the frame is said to be such that it is light enough to fly up to the left in vaudeville houses, yet strong enough to withstand the stress imposed upon it. The steel is rolled into the proper arc at the steel mill, and by installing special adapters, the proper radius is kept at all times. The itAu frames are positioned so as to allow room for three sets of speakers, they also permit the frame to be tilted to any desired angle, and may be folded in for maximum room when the frame is moved

to the back wall.

A special type of lacing hook is spaced around on the. face of frame, allowing the picture to be kept as low as possible. For masking ease, and fast installation, DlT>MCO also developed a curved metal masking frame that has the proper curvature to match radius of the frame.

Heaf Deflech

A method of successfully reducing the projector heat with a small loss of light was recently announced by the C. S. Ashcraft Manufacturing Company, Inc.

A cast aluminum blower housing and duct is mounted upon the front of the projection lamp with the light aperture coinciding with the light beam opening in the lamphouse front.

A five-inch heat reflecting glass mounted in a suitable frame, and held in position by spring clips, is set at an angle approximately 15 degrees to the optical axis. The angular position of this glass and frame is said to accomplish the following:

It reflects the heat beam downward toward the base of the lamphouse away from the mechanism. It presents a maximum area to the air cooled blast in the duct. lt defiects the air stream away from the interior of the lamphousing where. it would cause arc turbulence. It makes unnecessary the use of glass between the rear shutter and lamphouse, which ordinarily prevents the shutter fan from disturbing the arc, but reduces the total light about 10 per cent.

A ball bearing shunt wound motor is mounted on an extension of the blower and duct casting. This motor is connected directly to the arc terminals, and has a speed of about 3,500 rpm. A squirrel cage fan is mounted directly on the motor shaft so that an extremely high velocity and large volume of air is directed upon the filter glass. Suffcient heat is thus removed to prevent deterioration of the coated surfaces, it is claimed.

FOR MANAGEMENT Tickef Issuing Units

The Argus Manufacturing Company, is marketing its new, individually motqu ized ticket issuing units. The attractively finished cabinets accommodate three, four, or five individual units, any of which may be quickly and easily removed without affecting the operation of the others, according to the manw facturer.

Tickets, in sets of from one to four, are automatically dispensed in an upright position. Not more than one key of the same unit may be operated at one time, and it is said that the machine will not repeat if the key is held down. The delivery chute will not jam, if tickets are accidentally pushed back. When the ticket magazine is empty, the unit locks automatically, The sales total is recorded on tamper-proof, non-reversibile counter, and is always instantly

1953-54 Theatre Catalog, 11th Edition, Page 312