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This topic comprises 2 pages: 1 2
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Author
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Topic: Alternative Energy in the projection suite
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David Graham Rose
Expert Film Handler
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Posts: 187
From: Cambridge, UK
Registered: Sep 2002
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posted 05-20-2003 02:23 PM
Greetings All
I have recently been sitting on a Film Council board here in the UK and one of the tasks awarded to my research group has been the investigation of the use of alternative energy sources in the projection room.
As a prelude to my forthcoming round of research on this matter, I would like to take this opportunity to ask members of this forum whether or not they have had any experience in this matter.
The only instance of 'alternative' energy sources that I have encountered over here is back in 1958 when the Star Group of Companies, who operated a number of theatres in the UK at that time, attempted to convert the motor-generators at the Studios 1&2 Milford Haven, Pembs., to run on water power. This involved the use of water wheels, geared favourably and coupled to the rotor of the a.c. motor. A contactor was used to power an electromagnet which in turn held a large an arm at the end of which was a water wheel. On failure of power the contactor would open, thus killing the power to the electromagnet causing the arm to drop and the water wheel to lower into the race of the adjacent flour mill.
Unfortunately for Star Cinemas, this system did not work, since the time between the power failing, and the wheel gaining sufficient momentum to provide the necessary e.m.f. in the motor generator was too great.
Possibly, but having not yet carried out any calculations on a hypothetical mathematical model of this system, a sustained immersion in water and an auto changeover switch for power failure would have been more succesful. I have pictures somewhere of this system, but at present the I.T. Department has my scanner in for repair, so I will post them when next it is retrieved.
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