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vfuality Changeover Aids By Strong
Made by a Projectionist for Projectionists!
Reel-End Signal
Does not touch the film or reel.
Is strictly mechanical and requires no batteries, no transformers, no governors, and no pre-setting by the projectionist.
Is not dependent upon any change in the normal smooth operation of the projector.
Is installed within 5 minutes, requiring no drilling.
Once installed, forget it — as was conclusively demonstrated by 1200 tests under practical conditions in various projection rooms.
About 75 seconds before the end of the reel the bell begins to ring, continuing distinctly for 15 seconds, after which period of time it ceases. The duration of the bell-signal can be increased or decreased about 15 seconds by simply moving the arm to either the left or the right.
MOVE ARM TO LEFT TO LENGTHEN ALARM PERIOD. MOVE ARM TO RIGHT TO SHORTEN ALARM PERIOD
The Strong Reel-End Signal Is
Adjustable
for Either 4 or 5-inch Hubs PRICE: $8.50 each
Zipper Changeover
ZIPPER Changeovers for all models mount directly on the projector at the aperture and can be installed within 10 minutes without any drilling or tapping, etc., and require no brackets! A new-type treadle foot-switch, utilizing an unbreakable mercury switch, eliminates all switch trouble. Weighs only 20 ounces; guaranteed against trouble for one year after purchase.
The combination Sound-Vision Changeover is now available in all ZIPPER models for use with any RCA sound installation. This method of changeover is EXCLUSIVE with the STRONG ZIPPER, being fully covered under U. S. Patent No. 1,796,970. These combination models for RCA systems are priced at $125 per pair, including foot-switches.
ZIPPER Changeovers available for Simplex (all models) Motiograph (all models) and Kaplan projectors.
PRICE ON ALL MODELS $60 per pair
With Treadle Mercury Switches: $75
ESSANNAY ELECTRIC MANUFACTURING CO.
Makers of Precision Projection Equipment for 25 Years
1241 South Wabash Ave. Chicago, Illinois, U. S. A.
INTERNATIONAL PROJECTIONIST