Motion picture projector apparatus and high intensity projection

Details Motion picture projector apparatus and high intensity projection Motion picture projector apparatus and high intensity projection

1977-03-14

1978-06-06

Adams, Russell E.

Optics: motion pictures

Projection light sources

352202, G03B 2100

Patent

active

040933660

ABSTRACT:
A motion picture projector is provided with a high intensity projection arrangement for improved image projection that also provides a projection lamp having a longer operating life. The projector is interconnected to a power supply unit by a multiconductor umbilical cable to supply all voltage and power requirements of the projector.
The power supply unit is enabled to supply a high voltage starting pulse to the high intensity projection lamp only upon the occurrence of predetermined conditions to prevent shock hazards. The enabling control of the power supply is accomplished by the use of a standard projector control switch and a housing interlock switch on the projection lamp arrangement. Further, the power supply unit is enabled only when the umbilical cable is properly connected between the projector and the power supply unit by means of a return path continuity detector. The power supply unit is provided with an input power cord which is the only supply source connection of the projector and power supply unit arrangement.
Various conventional power supply sources may be utilized as the input to the power supply unit which is further provided with selection apparatus to supply the projector with a predetermined AC supply voltage, for example 110 VAC.

REFERENCES:
"Big Screen Projection", W. A. Williams, Super 8 Filmaker, Fall 1973, pp. 38-39.

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