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INTERNATIONAL PROJECTIONIST
December 1931
TWO NOTEWORTHY ACHIEVEMENTS IN PROJECTION EQUIPMENT
Complete rear shutter attachments showing framing device, shutter adjusting device, framing light, hinged eye shield, cooling plate, fire shutter lever and gate opening device.
B. &S. Rear Shutter
reduces aperture heat by 70%, minimizes effect of warped and buckled film, and keeps film free from dust and dirt. Exclusive blade feature of this shutter keeps hot air from film and insures constant supply of cool air around the aperture. The results of a test by the Massachusetts Department of Public Safety in a Boston theatre on January 19, 1930, are as follows:
Without B. & S. Rear Shutter Aperture Heat: 1250° F.
With B. & S. Rear Shutter Aperture Heat: 340° to 350° F.
Installation can be made in one hour on any single or double-bearing projector mechanism, without any cutting or drilling. Periodic oiling is the only maintenance requirement. Rear shutter equipment includes cooling plate, framing device, shutter timing adjustment, and a framing light. A hinged eye shield permits easy accessibility to the mechanism.
B. & S. Change-over
consists of two shutter blades contained in a housing designed for attachment to the cone of the lamphouse and operates on either A.G. or D.G., at 110 to 125 volts. Novel design eliminates any possibility of double exposure on the screen, and makes the change invisible to the audience. B. & S. Change-overs operate efficiently on either A.G. or D.G., but coils for the proper current will be supplied on specification. Goils of the B. & S. Ghange-over will stand up under heavy overloads and will not burn out.
The constant arcing in an ordinary change-over switch soon causes the metal contacts to burn and corrode. All B. & S. switch contacts are made of carbon that cannot corrode. B. & S. unique design also prevents the flash from touching any part of the switch. This switch cannot stick or bind and is positive in operation. B. & S. Ghangeovers have been used for many years in Publix, R-K-O, and other major theatre circuits.
BASSON & STERN
For fifteen years manufacturers of high grade motion picture equipment 749 EAST 32nd STREET, BROOKLYN, N. Y.