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Topic: Projection room vs Bio box
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William Hooper
Phenomenal Film Handler
Posts: 1879
From: Mobile, AL USA
Registered: Jun 99
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posted 02-27-2004 12:23 AM
quote: Does the "booth" or "box" designation apply only to the room with the projectors or also to adjacent rooms with related equipment? It seems pretty common in older houses for there to be a large room with at least two film projectors and maybe a slide projector (Brenograph) and/or followspot, as well as a separate rewind/film storage room and a third room for rectifiers/generators and dimmer rheostats (sometimes located underneath the room with the projectors).
In the 19teens it was typical for the whole mess to be in the one fireproof room: projectors, rectifiers, etc. By about 1924 it was more typical to have a separate room for the rectifiers/motor generators. The room would either be off the booth, or in the entry hall/vestibule to the booth. In both cases, the construction of the room (or hall if there were rectifiers or generators there) was also bomb-proof concrete like the room with the projectors. In blueprints, I've seen it identified as either rectifier room or motor room. I don't know if it was an NEC or building codes thing, but designs seemed to be fairly univerally adopted as they went along, for safety or to play it safe with regs. By the time of the SMPTE Motion Picture Projection & Presentation Manual's 1969 diagram of a basic booth in "Physical Aspects of the Projection Room", the rectifiers are just sitting in the same single booth space with the projectors, etc.
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