> > > >

1948-49 Theatre Catalog, 7th Edition, Page 422 (409)

1948-49 Theatre Catalog, 7th Edition
1948-49 Theatre Catalog
1948-49 Theatre Catalog, 7th Edition, Page 422
Page 422

1948-49 Theatre Catalog, 7th Edition, Page 422

A Light Duty and Portable 35mm. Sound Projector

The Post-War Return of a Quality Product to Serve Small Theatres, School Auditoria or Industrial Uses

Projection equipment for small theatres and for industrial and institutional usage represents a tributary but important branch of the motion picture theatre equipment industry. One outstanding product in this specialized fieldethe Simplex Sound Projector Type "SP"#is not new in the contemporary sense of the word but it has been out of circulation for some years due to the war, and may, therefore, be unknown to many industrialists, educators, and small theatre owners now actively engaged in projection on a medium or small scale. Others who could probably use such equipment to good advantage may have forgotten it during its dormant period. For these reasons, THEATRE CATALOG is presenting detailed data on this special projection equipment for the purpose of acquainting the trade with


its engineering, parts, advantages and even its limitations.

The Proiecl'or

The Simplex tiSPll was designed and constructed for use in smaller theatres and auditoria where the seating capacity does not exceed 800, and the daily program is more frequently of an intermittent nature than a continuous, unremitting grind of 14 to 20 hours a day. Although built for a less strenuous life than its big brotherse-the famous Simplex E-T and Super-Simplex Projectorse the Simplex ISim incorporates many of the features of the heavy-duty models.

In actual performance, the Simplex 0813" gives highly satisfactory results. It delivers to the screen pictures that are brilliant and without vibration; and recreates with excellent Fidelity the

sound produced by Hollywood.

The Simplex Sound Projector Type TSPT has been designed primarily for small auditoria and intermittent rather than continuous 35 mm. usage. For this reason it is ideal projection equipment for the smaller theatre, in,dustrial and institutional work. The mechanism is described in this article and its main component parts analyzed. In addition, related equipment is mentioned. The purpose of this entire survey is to re-alerl veteran readers to its post-war return to [he 35 mm. equipment held; as well as to introduce it to many newer industryin with no prior acquaintance.

. a.

Economically, the projector is inexpensive to maintain and is designed to stand up well under all kinds of treatment. The manufacturer claims that it will give fine dependable service at all times. Structurally, the mechanism is well designed, being housed along with the sound unit and lower magazine in a handsome, compact case of durable masonite. Panels are easily removed for effective access to all parts of the mech anism.

Three Types of Lamps Available

For small auditoria, of limited seating capacity, or where the utmost simplicity of operation is required, illumination by Mazda lamp may be desirable. Duplex construction (One metal lamphouse within another) provides for passage of air from ventilating fan in the projector. This extremely efhcient cooling system with motor-driven fan permits the use of either a 1000 or 1500 watt 105120 volt pre-focused lamp. Model is equipped with Mogul prefocus socket for T-20 lamp, B & L reflector, Fresnal con(lensing lens, and switches for sound and picture changeover.

A low intensity reflector arc lamp, designed to project a picture of a size and brilliancy comparable with any of the larger projectors equipped with low intensity arcs, is also available. Carbons are fed automatically and continuously so that a uniform arc gap is secured without manual control. The lamp can be operated from 15 to 21 amperes at 55 volts DC. 7 mm. negative and 10 mm. positive 8" long carbons are used. Model has a mercoid sound changeover switch on dowser and other modern improvements which are similar to those used on larger and more costly equipment.

LEFT, with low intensity reflector arc light source.
1948-49 Theatre Catalog, 7th Edition, Page 422