Altman Stage Lighting Company

Buhl Electric, Inc.

Arthur Hewett

A lighting apparatus includes a discharge arc lamp illumination source, an elliptical reflector completely surrounding the illumination source for collecting and projecting light from the illumination source, a shutter for dimming the amount of light generated by the illumination source and emanating from the lighting apparatus. The shutter is mechanically operable to defined an optical passageway therethrough of variable cross sectional area. The shutter includes a plurality of shutter blades mounted in a movable relationship relative to each other in response to user input. The shutter blades is movable to define the optical passageway of variable cross sectional area to dim the amount of light from the illumination source passing therethrough over the range of from about 0 to 100%.

Light fixture with elliptical reflector and mechanical shutter dimmer

Apparatus for positioning apertures in a beam of light including a plurality of drive members coaxially supported on a longitudinally extending shaft, each having a separate electrically operable drive motor mechanically interlocked therewith.

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Berkeley Heights, NJ, United States of America

Arthur Hewett