Adjustable illuminating device

Claim 2

An illuminating device comprising a housing provided with a window including a pair of transversely spaced parallel translucent plates; a light source in said housing emitting a beam of light; reflecting means in said housing confronting said light source for directing different bundles of light rays from said beam unto respective areas of said window; and a multiplicity of independently displaceable light shields individually interposable in the paths of said bundles for selectively varying the intensity of illumination of said areas.

Claim 3

A device as defined in claim 1, wherein said reflecting means comprises a set of elongate, generally parallel mirrors separated by narrow gaps and inclined at different angles for illuminating contiguous rectangular zones of said window, said light shields being disposed in said gaps.

Claim 4

An illuminating device comprising a housing provided with a window; a light source in said housing emitting a beam of light; reflecting means in said housing confronting said light source for directing different bundles of light rays from said beam unto respective areas of said window; and a multiplicity of independently displaceable light shields individually interposable in the paths of said bundles for selectively varying the intensity of illumination of said areas; said reflecting means including a set of elongate, generally parallel mirrors separated by narrow gaps and inclined at different angles for illuminating contiguous rectangular zones of said window, said light shields being disposed in said gaps, and a common reflector for all light rays reflected by said mirrors.

Claim 5

An illuminating device comprising a housing provided with a window; a light source in said housing emitting a beam of light; reflecting means in said housing confronting said light source for directing different bundles of light rays from said beam unto respective areas of said window; and a multiplicity of independently displaceable light shields individually interposable in the paths of said bundles for selectively varying the intensity of illumination of said areas; said reflecting means including a set of elongate, generally parallel mirrors separated by narrow gaps and inclined at different angles for illuminating contiguous rectangular zones of said window, said light shields being disposed in said gaps, and a common reflector for all light rays reflected by said mirrors.

Claim 6

A device as defined in claim 3 wherein said mirrors are disposed at acute angles to the direction of incidence of light rays from said source, said light shields being movable in planes substantially bisecting the angles between the directions of incident and reflected light rays.

Claim 7

A device as defined in claim 3, wherein said light source comprises a punctiform radiation emitter, a concave reflector for said radiation on one side of said light source, and lens means on the other side of said light source for concentrating said radiation into a beam of diverging rays.

Claim 8

A device as defined in claim 3, wherein said window includes a pair of transversely spaced parallel translucent plates.

Claim 9

A device as defined in claim 3, further comprising a grating adjacent said window inside said housing, said grating consisting of thiN opaque strips lying in planes parallel to the directions of light rays impinging upon said window from said reflecting means.

Claim 10

An illuminating device comprising a housing provided with a window; a light source in said housing emitting a beam of light; reflecting means in said housing confronting said light source for directing different bundles of light rays from said beam unto respective areas of said window; and a multiplicity of independently displaceable light shields individually interposable in the paths of said bundles for selectively varying the intensity of illumination of said areas; said reflecting means including a set of elongate, generally parallel mirrors separated by narrow gaps and inclined at different angles for illuminating contiguous rectangular zones of said window, said mirrors being disposed at acute angles to the direction of incidence of light rays from said source, said light shields being mounted in said gaps and movable in planes substantially bisecting the angles between the directions of incident and reflected light rays.

Claim 11

An illuminating device comprising a housing provided with a window; a light source in said housing emitting a beam of light; reflecting means in said housing confronting said light source for directing different bundles of light rays from said beam unto respective areas of said window; and a multiplicity of independently displaceable light shields individually interposable in the paths of said bundles for selectively varying the intensity of illumination of said areas; said reflecting means including a set of elongate, generally parallel mirrors separated by narrow gaps and inclined at different angles for illuminating contiguous rectangular zones of said window, said mirrors being disposed at acute angles to the direction of incidence of light rays from said source, said light shields being mounted in said gaps and movable in planes substantially bisecting the angles between the directions of incident and reflected light rays.

Claim 12

A device as defined in claim 8, wherein said light shields are a set of closely juxtaposed tongues within each gap, the effective width of each tongue along the gap being substantially equal to the width of the adjoining mirrors transverse to the gap.

Claim 13

A device as defined in claim 9, wherein said effective width increases for successive sets of tongues with decreasing angle of incidence of said light rays.

Claim 14

A device as defined in claim 9, wherein the average opacity of said light shields decreases for successive sets of tongues with increasing angle of incidence of said light rays.

Claim 15

A device as defined in claim 9, wherein said tongues overlap one another within each gap in imbricate relationship.

Claim 16

A device as defined in claim 9 wherein said tongues are provided with individual handles projecting outwardly from said housing for manual displacement.

Claim 17

A device as defined in claim 13, further comprising a common resetting element engageable with all said handles and accessible from outside said housing.

Claim 18

A device as defined in claim 8, wherein said mirrors are provided with mounting means including a frame, resilient strip means on said frame, and adjusting means urging an edge of each mirror into contact with said strip means to an extent determining the angle of inclination of the respective mirror relative to said frame.

Claim 19

An illuminating device comprising a housing provided with a window; a light source in said housing emitting a beam of light; reflecting means in said housing confronting said light source for directing different bundles of light rays from said beam unto respective areas of said window; a multiplicity of independently displaceable light shields individually interposable in the paths of said bundles for selectively varying the intensity of illumination of said areas; and a grating adjacent said window inside said housing, said grating consisting of thin opaque strips lying in planes parallel to the directions of light rays impinging upon said window from said reflecting means.

Claim 20

An illuminating device comprising a housing provided with a window; a light source in said housing emitting a beam of light; reflecting means in said housing confronting said light source for directing different bundles of light rays from said beam unto respective areas of said window; a multiplicity of independently displaceable light shields individually interposable in the paths of said bundles for selectively varying the intensity of illumination of said areas; and a grating adjacent said window inside said housing, said grating consisting of thin opaque strips lying in planes parallel to the directions of light rays impinging upon said window from said reflecting means.

Claim 21

A device as defined in claim 16, wherein said reflecting means further comprises a common reflector for all light rays reflected by said mirrors.