> > > >

1945 Theatre Catalog, 4th Edition, Page 330 (306)

1945 Theatre Catalog, 4th Edition
1945 Theatre Catalog
1945 Theatre Catalog, 4th Edition, Page 330
Page 330

1945 Theatre Catalog, 4th Edition, Page 330

The rugged mounting plate assures precise alignment of the entire projector mechanism. The precision jig, drilled and machined, allows immediate replacement of parts requiring service with maximum certainty of correct operating realignment.

A synchronizing adjustment is provided for quick, easy timing of shutter with intermittent movement.

A safety shutter protects the film against damage should the light source he accidentally connected and directed against the aperture while the projector is not in motion.

The lens housing is completely enclosed to prevent dust from settling on the lens. Facilities are incorporated for microscopic focusing.

Projector cases of heavy sheet steel have been designed to furnish the maximum protection to the projector mechanism and to insure positive door alignment.

Threading the new DeVry projector is quick and simple, the film virtually iiowing into operating position. A threading lamp is provided to illuminate the filmhandling mechanism while threading. A secondary aperture separates the pilot lamp, giving clear vision to the film or threading in frame.

The lamphouse carriage is designed to accommodate any standard arc lamphouse. A heavy-duty, alternating-current driving motor supplies all the mechanical power required for operating the projector and sound head.

The projector pedestal is constructed

of iron castings and is of sufficient floor area to guarantee adequate maintenance of alignment between the projector and projector ports. A positive tilting. device/acting in a manner to minimize projector misalignment with port when projector is tilted, is incorporated.

12000 Series

In a dress of old ivory, with chrome trimming, and with levers, switch buttons, and adjusting-mechanism-heads in bright red, the 12000 series theatre projector and amplifier were unveiled last fall. Outstanding feature is its builtin projectorahead which incorporates projection mechanism and sound-head in one compact, complete, and readily accessible and unplaceable unit. The projector head can be removed for servicing or replacement in a few minutes time, without the use of special tools.

Refinements in the picture projector mechanism of the 12000 series result in reduced temperatures at the film gateless than 150 degrees when operating with high-intensity arcseadding greatly to the convenience of the operator in the handling of film. These improvements also eliminat any possible damage to the film from high aperature-rail temperatures.

The pedestal of the 12000 series incorporates several refinements, including; (1) four-point leveling; (2) improved and more rugged elevator mechanism; and (3) a training mechanism which allows projector to be swung from side to side for screen alignment. The new


base is interchangeable for all types of arcs and projector heads. The new base is designed for absolute rigidity, to assure vibrationless performance.

The 12000 series projector is pinned and registered to the arc lamp pedestal in such a way as to allow about five minutes for changeover of the complete mechanism-#expediting any required servicing. All wiring terminates in a barrier-type terminal strip, eliminating any necessity of splicing during projectoris installation.

For the 12000 series, film magazines are available up to 4000-foot capacity. Both the feed and take-up magazines are instantly removable for servicing or adjustment.

The 12000 series is an addition to the DeVry line of motion-picture sound equipment, and will be available, when desired, in either battleship gray and in the new ivory and chrome Victory dress.


A good projector is one which assures an audience of pictures that are steady, bright, clean, and in focus, but a poor projector impairs these qualities. It is not enough for a mechanism to produce ideal screen results only when it is brandnew. A cheaply-and-carelessly-built device might do almost as much when it is just fresh from the factory. But it would not stand up very long under the kind of strain a projector must endure. In the mechanism, the most sensitive, delicate and important parts are just the ones that have to come to a full stop and start again 160,000 times to show one feature picture. Yet it must continue to deliver ideal screen results after many years of that kind of strenuous operation. Otherwise, it is not a practical machine for practical theatre business.

The almost endless field of the mechanical arts has been searched and researched from end to end for devices and materials to be used in motion picture projectors. The field of the mechanical arts is so large that there is always more than one way of doing a given thing. Each separate requirement of good projection can be met by a number of different mechanical arrangementsethere is no ifone and only" way of dealing with these technical problems.

But the designers of Simplex projectors are convinced that in solving most of them there is only one best way. This conviction they derive from a great many years of experience, for the companies now merged in International Projector Corporation were the pioneer companies of the business.

Their experience has taught them not only what devices and methods in a projector mechanism will best give the desired screen results, but what methods will best continue to give them year after grinding year.

Sieadiness of Image

To illustrate, consider one or two details of the problem of maintaining a steady screen image. Here is what seems to be a trifl%Simplex E-7 intermittent sprockets are ground to dimensions after hardening. In other words, when the sprocket has been ground and gauge-inspected, it is put on the pro THEATRE CATALOG-1945
1945 Theatre Catalog, 4th Edition, Page 330