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1954-55 Theatre Catalog, 12th Edition, Page 292 (256)

1954-55 Theatre Catalog, 12th Edition
1954-55 Theatre Catalog
1954-55 Theatre Catalog, 12th Edition, Page 292
Page 292

1954-55 Theatre Catalog, 12th Edition, Page 292

Projection Are Lamp Review

A Survey ofthe Latest Advances Made in Projection Arc Lamps Plus Information on Proper Installatibn, Operation, and Care,

BRIEF: In times of great technological change . . . such as the motion picture industry has been going through . . . one of the most (Imicult problems facing the exhibitor is how to keep up with all of the latest advances made . . . One area which has seen a great deal of activity is that of screen illumination. . . . The demand for increased light made by the new systems has made it more important than ever that the theatre operator be aware of what is happening.

In an attempt to ofer some help along these lines . . . we have requested that the leading arc lamp manufacturers submit information and illustrations about their latest products . . . Thanks to their splendid cooperation we have been able to assemble this review . . . in which there is much valuable information . . . not only about the new lamps . . . but data on installation . . . maintenance . . . and operation.

The following firms supplied the information used in this article: Strong Electric Corporation, J. E. McAuley Manufacturing Company, C. S. Ashcroft Manufacturing Company, Inc., and the Theatre Equipment division of the Radio Corporation of America.



New motion picture techniques which gained their first wide acceptance during 1953 imposed new requirements on projection light sources as well as on theatre projectors and sound systems.

A noteworthy advance designed to meet the new screen lighting demands of wide-screen and 3-D productions was the RCA Wide-Arc System announced during the year by the Theatre Equipment division of the Radio Corporation of America.

Generating enough light to provide brilliant images on screens up to 70 feet in width, the new lamp is now widely used in indoor theatres showing pictures in the new dimensions, and also in drivesins, where means of achieving greater screen brilliance is also an obvious advantage.

The RCA WidevArc operates with a 9mm, 10mm, or 11mm standard positive carbon, or with a Hitex 10mm positive carbon. The positive carbon rotates at the rate of 15 revolutions per minute,

or nearly twice the rate employed in lamps of earlier design, providing maximum arc stability. 1

Features of the RCA Wide-Arc include special cooling devices, large 16inch diameter rellector, fool-proof feed mechanism with rotating motion of the positive carbon, accurate positioning controls, and convenient dowser control handles.

Used With Any Proiector

The lamp can be used with any type theatre projector. For operation above 100 amperes, it employes a unique heat reflecting glass with a motor-driven fan, assembled in a convenient housing which is mounted between the arc lamp and the shutter housing. The lamp system also employs a new RCA water circulator which operates directly from the arc voltage. When DC power is supplied to the arc lamp, the water circulator starts automatically.

Heat generated by the Hitex carbons is dissipated from the lamphouse by a low stack assembly located immediately

THE BCA Wide-Arc is seen here in an open (left) and closed (right) View. Some of the special lectures at this lamp are accurate positioning controls, cooling devices. and a 16 inch diameter reflector.

1954-55 Theatre Catalog, 12th Edition, Page 292