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August, 1929
The INTERNATIONAL PHOTOGRAPHER
Eleven
How Bell & Howell build
Silence into
SOUND CAMERAS
Silence . . . and yet mobility!
Thus the order came to Bell & Howell engineers and designers. And again there was a demonstration of that great precision and accuracy, that thorough-going engineering skill which has made Bell & Howell a by-word in nearly every major studio.
Felt linings, fiber gears, solid bronze bearings, endless fabric belts, sponge rubber coverings . . . every known method of cancelling, intercepting, and muffling mechanical noises was brought into play. The result is the Bell & Howell Standard Sound Camera, which operates within ten feet of the microphone, without a booth, and not the faintest click registers on the sound track.
Consultations on any phase of sound-recording installations are invited.
Bell £i Howe!! 1000-ft. Sound-Proof Magazine equipped with Silent Belt Tightener that keeps uniform tension on endless fabric bt It
Silent Belt Tightener on Bell & Howell 400ft. Magazine. 1. Endless fabric belt
1,000-ft. Sound-Proof Magazine shown Speed movement of Bell & Howell
disassembled: 1. Sound intercepting camera equipped for sound work — 1.
holes drilled in back of magazine drums Check-pawl super-speed movement — ?.
— 2. Front of magazine with rubber Felt lining of camera door — }. Endless cover removed—}. Three-inch spool— 4. fabric belt— 4. Belt tightener
Rubber outer cover—}. Film roller — 6. Oilless film roller bearing
Bell & Howell check pawl super-speed
movement — 1. Driving finger — 2.
Formica {fiber) gear
BELL & HOWELL COMPANY
Dept. H, 1851 Larchmont Ave., Chicago, Illinois
NEW YORK, 11 W. 42ND ST. HOLLYWOOD, 6324 SANTA MONICA BLVD.
LONDON (B. & H. CO., LTD.), 320 REGENT STREET .... ESTABLISHED 1907