Compact shutter assembly for a luminaire

Details Compact shutter assembly for a luminaire Compact shutter assembly for a luminaire

2006-04-25

2006-04-25

Quach-Lee, Y. My (Department: 2875)

Illumination

Light modifier

Adjustable or positionable

C362S277000, C362S283000, C362S322000

Reexamination Certificate

active

07033047

ABSTRACT:
A shutter section includes a stack of circular plates independently rotatable in a nest formed as a laminar formation of rings. The plates have central openings defining a light path. Four central plates in the stack are shutter guide plates with radial guide slots slideably holding shutter blades. Two outer pairs of plates are shutter drive plates connected by cams to the shutter blades. Simultaneous rotation of a shutter guide plate and associated shutter drive plate causes rotation of an associated shutter blade around the light path. Rotation of a shutter drive plate while the associated shutter guide plate is stationary causes the cam to move the associated shutter blade radially. The nest is enclosed by end plates. A motor section has motors driving pinions to rotate the circular plates. The circular plates, rings pinions and shutter blades are made of sheet metal. Shutters may be provided as interleaved pairs each driven by a pair of rotatable drive plates.

REFERENCES:
patent: 5398408 (1995-03-01), Bernet
patent: 5510969 (1996-04-01), Rodger et al.
patent: 6102554 (2000-08-01), Wynne Willson et al.
patent: 6550939 (2003-04-01), Reinert
patent: 6837596 (2005-01-01), Tanaka et al.
patent: 2002/0060911 (2002-05-01), Brockmann et al.
PCT International Search Report and Written Opinion of the International Searching Authority, Jun. 29, 2005; PCT/US04/26099.

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