Lighting fixture with internal glare and spill control assembly

• US 5,938,317 A
• Filed: 05/29/1996
• Issued: 08/17/1999
• Est. Priority Date: 05/29/1996
• Status: Expired due to Term

• Current Assignee: Hubbell, Inc.
• Original Assignee: Hubbell, Inc.
• Inventors: Thornton, Gerry F.
• Primary Examiner(s): TSO, LAURA K
• Application Number:
  US08/654,733
• Time in Patent Office: 1,175 Days
• Field of Search: 362/290, 362/296, 362/293, 362/297, 362/346
• US Class Current: 362/290
• CPC Class Codes: F21V 11/02 using parallel laminae or strips, e.g. of Venetian-blind type F21V11/06 takes precedence
• CPC Class Codes: F21V 21/30 Pivoted housings or frames
• CPC Class Codes: F21W 2131/10 Outdoor lighting
• CPC Class Codes: F21W 2131/406 for theatres, stages or film studios

Abstract

A lighting fixture for lighting a large area such as a sporting field. The lighting fixture has a bowl-shaped reflector with an internal glare and spill control assembly for aiming and controlling the light emitted therefrom. The glare and spill control assembly is located within the bowl-shaped reflector and behind the lens cover of the lighting fixture so that the glare and spill control assembly is substantially isolated from the effects of weather. The glare and spill control assembly preferably has a plurality of arc-shaped louvers located substantially in the upper half of the reflector for controlling glare and spill of the light from the lamp. The lower half of the reflector preferably has either a reflector insert for redirecting light more parallel to the central aiming axis, or a light absorbing baffle for reducing glare.

Claims

1. A lighting fixture for lighting an area, comprising:

a single-ended lamp having a longitudinal axis extending from a base section to a bulb section;

a bowl-shaped reflector having an interior reflective surface with a central aiming axis and a front peripheral edge defining a front opening;

a lamp mounting socket fixedly coupled to said reflector and electrically coupled to said base section of said lamp for supporting said lamp within said reflector said lamp mounting socket being spaced from said central aiming axis;

a lens cover coupled to said reflector for covering said front opening of said reflector to protect said lamp from weather; and

a glare and spill control assembly coupled to said interior reflective surface of said reflector and behind said lens cover, said glare and spill control assembly including a first arc-shaped louver having an outer surface and an inner surface, said first louver being angled inwardly towards said central aiming axis of said reflector as said first louver approaches said lens cover.

2. A lighting fixture according to claim 1, wherein

said lamp mounting socket is offset from said central aiming axis of said reflector such that said longitudinal axis of said lamp extends substantially perpendicular to said central aiming axis of said reflector.

3. A lighting fixture according to claim 2, wherein

said inner surface of said first louver has a light absorbing finish.

4. A lighting fixture according to claim 3, wherein

said first louver is angled relative to said interior surface of said reflector and said lamp such that a portion of reflected light produced by said lamp and reflected from said interior surface of said reflector passes substantially parallel to said inner and outer surfaces of said first louver.

5. A lighting fixture according to claim 4, wherein

said first louver extends at least approximately 180°

about said central aiming axis of said reflector.

19. A lighting fixture according to claim 5, wherein

said glare and spill control assembly further includes an internal reflector insert coupled to said interior surface of said reflector substantially opposite said first louver and angled to reflect light more parallel to said central aiming axis.

20. A lighting fixture according to claim 19, wherein

said reflector insert is a substantially parabolic reflector insert formed by a plurality of substantially planar segments.

21. A lighting fixture according to claim 20, wherein

said reflector insert extends approximately 120°

relative to said central aiming axis.

22. A lighting fixture according to claim 21, wherein

said reflector insert is constructed of a plurality of trapezoidal reflector elements with each of said reflector elements having an altitude and being bent substantially perpendicular to said altitude, respectively.

6. A lighting fixture for lighting an area, comprising:

a single-ended lamp having a longitudinal axis extending from a base section to a bulb section;

a bowl-shaped reflector having an interior reflective surface with a central aiming axis and a front peripheral edge defining a front opening;

a lamp mounting socket fixedly coupled to said reflector and electrically coupled to said base section of said lamp for supporting said lamp within said reflector;

a lens cover coupled to said reflector for covering said front opening of said reflector to protect said lamp from weather; and

a glare and spill control assembly coupled to said interior reflective surface of said reflector and behind said lens cover, said glare and spill control assembly including a first arc-shaped louver having an outer surface and an inner surface, said first louver being paneled inwardly towards said central aiming axis of said reflector as said first louver approaches said lens cover,

said lamp mounting socket being offset from said central aiming axis of said reflector such that said longitudinal axis of said lamp extends substantially perpendicular to said central aiming axis of said reflector,

said inner surface of said first louver having a light absorbing finish,

said first louver being angled relative to said interior surface of said reflector and said lamp such that a portion of reflected light produced by said lamp and reflected from said interior surface of said reflector passes substantially parallel to said inner and outer surfaces of said first louver,

said glare and spill control assembly further including a second arc-shaped louver having an outer surface and an inner surface, said second louver being spaced inwardly from said first louver towards said central aiming axis.

7. A lighting fixture according to claim 6, wherein

said outer and inner surfaces of said second louver are angled inwardly towards said central aiming axis of said reflector as said second louver approaches said lens cover.

8. A lighting fixture according to claim 7, wherein

said inner surface of said second louver has a reflective finish.

9. A lighting fixture according to claim 8, wherein

said arc-shaped louvers are formed by a plurality of substantially planar segments.

10. A lighting fixture according to claim 8, wherein

said first and second louvers extend through arcs of at least approximately 180°

.

11. A lighting fixture according to claim 6, wherein

said outer and inner surfaces of said second louver are angled outwardly away from said central aiming axis of said reflector as said second louver approaches said lens cover.

12. A lighting fixture according to claim 11, wherein

said inner surface of said second louver has a reflective finish.

13. A lighting fixture according to claim 12, wherein

said arc-shaped louvers are formed by a plurality of substantially planar segments.

14. A lighting fixture according to claim 13, wherein

said first and second louvers extend through arcs of at least approximately 180°

.

15. A lighting fixture for lighting an area, comprising:

a single-ended lamp having a longitudinal axis extending from a base section to a bulb section;

a bowl-shaped reflector having an interior reflective surface with a central aiming axis and a front peripheral edge defining a front opening;

a lamp mounting socket fixedly coupled to said reflector and electrically coupled to said base section of said lamp for supporting said lamp within said reflector;

a lens cover coupled to said reflector for covering said front opening of said reflector to protect said lamp from weather; and

a glare and spill control assembly coupled to said interior reflective surface of said reflector and behind said lens cover, said glare and spill control assembly including a first arc-shaped louver having an outer surface and an inner surface, said first louver being angled inwardly towards said central aiming axis of said reflector as said first louver approaches said lens cover,

said lamp mounting socket being offset from said central aiming axis of said reflector such that said longitudinal axis of said lamp extends substantially perpendicular to said central aiming axis of said reflector,

said inner surface of said first louver having a light absorbing finish,

said first louver being angled relative to said interior surface of said reflector and said lamp such that a portion of reflected light produced by said lamp and reflected from said interior surface of said reflector passes substantially parallel to said inner and outer surfaces of said first louver,

said glare and spill control assembly further including a second arc-shaped louver having an outer surface and an inner surface said second louver being spaced inwardly from said first louver towards said central aiming axis,

said outer and inner surfaces of said second louver extending substantially parallel to said central aiming axis to redirect light from said lamp towards said central aiming axis.

16. A lighting fixture according to claim 15, wherein

said inner surface of said second louver has a reflective finish.

17. A lighting fixture according to claim 16, wherein

said arc-shaped louvers are formed by a plurality of substantially planar segments.

18. A lighting fixture according to claim 17, wherein

said first and second louvers extend through arcs of at least approximately 180°

.

23. A lighting fixture for lighting an area, comprising:

a single-ended lamp having a longitudinal axis extending from a base section to a bulb section;

a bowl-shaped reflector having an interior reflective surface with a central aiming axis and a front peripheral edge defining a front opening;

a lamp mounting socket fixedly coupled to said reflector and electrically coupled to said base section of said lamp for supporting said lamp within said reflector;

a lens cover coupled to said reflector for covering said front opening of said reflector to protect said lamp from weather; and

a glare and spill control assembly coupled to said interior reflective surface of said reflector and behind said lens cover, said glare and spill control assembly including a first arc-shaped louver having an outer surface and an inner surface, said first louver being angled inwardly towards said central aiming axis of said reflector as said first louver approaches said lens cover,

said lamp mounting socket being offset from said central aiming axis of said reflector such that said longitudinal axis of said lamp extends substantially perpendicular to said central aiming axis of said reflector,

said inner surface of said first louver having a light absorbing finish,

said first louver being angled relative to said interior surface of said reflector and said lamp such that a portion of reflected light produced by said lamp and reflected from said interior surface of said reflector passes substantially parallel to said inner and outer surfaces of said first louver,

said glare and spill control assembly further including a second arc-shaped louver having an outer surface and an inner surface, said second louver being spaced inwardly from said first louver towards said central aiming axis,

said outer and inner surfaces of said second louver being angled inwardly towards said central aiming axis of said reflector as said second louver approaches said lens cover,

said glare and spill control assembly further including a third arc-shaped louver spaced inwardly from said first and second louvers towards said central aiming axis, said third louver having an inner surface and an outer surface.

24. A lighting fixture according to claim 23, wherein

said inner and outer surfaces of said third louver are angled inwardly towards said central aiming axis of said reflector as said third louver approaches said lens cover.

25. A lighting fixture according to claim 24, wherein

said inner surfaces of said second and third louvers have reflective finishes.

26. A lighting fixture according to claim 25, wherein

said outer surfaces of said second and third louvers have light absorbing finishes.

27. A lighting fixture according to claim 25, wherein

said first, second and third arc-shaped louvers are formed by a plurality of substantially planar segments.

28. A lighting fixture according to claim 23, wherein

said inner and outer surfaces of said third louver extend in a direction substantially parallel to said central aiming axis to redirect light from said lamp towards said central aiming axis.

29. A lighting fixture according to claim 28, wherein

said inner surfaces of said second and third louvers have reflective finishes.

30. A lighting fixture according to claim 29, wherein

said outer surfaces of said second and third louvers have light absorbing finishes.

31. A lighting fixture according to claim 30, wherein

said first, second and third arc-shaped louvers are formed by a plurality of substantially planar segments.

32. A lighting fixture according to claim 31, wherein

said glare and spill control assembly further includes an internal reflector insert coupled to said interior surface of said reflector substantially opposite said first louver and angled to reflect light more parallel to said central aiming axis.

33. A lighting fixture according to claim 32, wherein

said reflector insert extends approximately 120°

relative to said central aiming axis.

34. A lighting fixture according to claim 33, wherein

said reflector insert is constructed of a plurality of trapezoidal reflector elements with each of said reflector elements having an altitude and being bent substantially perpendicular to altitude, respectively.

35. A lighting fixture according to claim 31, wherein

said reflector insert is a substantially parabolic reflector insert formed by a plurality of substantially planar segments.

47. A lighting fixture according to claim 28, wherein

said outer and inner surfaces of said second louver are angled outwardly away from said central aiming axis of said reflector as said second louver approaches said lens cover.

36. A lighting fixture for lighting an area, comprising:

a single-ended lamp having a longitudinal axis extending from a base section to a bulb section;

a bowl-shaped reflector having an interior reflective surface with a central aiming axis and a front peripheral edge defining a front opening;

a lamp mounting socket fixedly coupled to said reflector and electrically coupled to said base section of said lamp for supporting said lamp within said reflector;

a lens cover coupled to said reflector for covering said front opening of said reflector to protect said lamp from weather; and

a glare and spill control assembly coupled to said interior reflective surface of said reflector and behind said lens cover, said glare and spill control assembly including a first arc-shaped louver having an outer surface and an inner surface, said first louver being angled inwardly towards said central aiming axis of said reflector as said first louver approaches said lens cover,

said lamp mounting socket being offset from said central aiming axis of said reflector such that said longitudinal axis of said lamp extends substantially perpendicular to said central aiming axis of said reflector,

said inner surface of said first louver having a light absorbing finish,

said first louver being angled relative to said interior surface of said reflector and said lamp such that a portion of reflected light produced by said lamp and reflected from said interior surface of said reflector passes substantially parallel to said inner and outer surfaces of said first louver,

said glare and spill control assembly further including a second arc-shaped louver having an outer surface and an inner surface said second louver being spaced inwardly from said first louver towards said central aiming axis,

said outer and inner surfaces of said second louver being angled inwardly towards said central aiming axis of said reflector as said second louver approaches said lens cover,

said glare and spill control assembly further including a third arc-shaped louver spaced inwardly from said first and second louvers towards said central aiming axis, said third louver having an inner surface and an outer surface,

said inner and outer surfaces of said third louver extending in a direction substantially parallel to said central aiming axis to redirect light from said lamp towards said central aiming axis,

said inner surfaces of said second and third louvers having reflective finishes,

said outer surfaces of said second and third louvers having light absorbing finishes,

said first, second and third arc-shaped louvers being formed by a plurality of substantially planar segments,

said glare and spill control assembly further including an arc-shaped light absorbing baffle coupled to said interior surface of said reflector along said front peripheral edge.

37. A lighting fixture according to claim 36, wherein

said light absorbing baffle extends approximately 180°

about said front peripheral edge of said reflector.

38. A lighting fixture for lighting an area, comprising:

a single-ended lamp having a longitudinal axis extending from a base section to a bulb section;

a bowl-shaped reflector having an interior reflective surface with a central aiming axis and a front peripheral edge defining a front opening;

a lamp mounting socket fixedly coupled to said reflector and electrically coupled to said base section of said lamp for supporting said lamp within said reflector;

a lens cover coupled to said reflector for covering said front opening of said reflector to protect said lamp from weather; and

a glare and spill control assembly coupled to said interior reflective surface of said reflector and behind said lens cover, said glare and spill control assembly including a first arc-shaped louver having an outer surface and an inner surface, said first louver being angled inwardly towards said central aiming axis of said reflector as said first louver approaches said lens cover,

said lamp mounting socket being offset from said central aiming axis of said reflector such that said longitudinal axis of said lamp extends substantially perpendicular to said central aiming axis of said reflector,

said inner surface of said first louver having a light absorbing finish,

said first louver being angled relative to said interior surface of said reflector and said lamp such that a portion of reflected light produced by said lamp and reflected from said interior surface of said reflector passes substantially parallel to said inner and outer surfaces of said first louver,

said glare and spill control assembly further including a second arc-shaped louver having an outer surface and an inner surface, said second louver being spaced inwardly from said first louver towards said central aiming axis,

said outer and inner surfaces of said second louver being angled inwardly towards said central aiming axis of said reflector as said second louver approaches said lens cover,

said glare and spill control assembly further including a third arc-shaped louver spaced inwardly from said first and second louvers towards said central aiming axis, said third louver having an inner surface and an outer surface,

said glare and spill control assembly further includes a fourth arc-shaped louver spaced inwardly from said first, second and third louvers towards said central aiming axis, said fourth louver having an inner surface and an outer surface.

39. A lighting fixture according to claim 38, wherein

said inner and outer surfaces of said fourth louver extend in a direction substantially parallel to said central aiming axis to redirect light from said lamp towards said central aiming axis.

40. A lighting fixture according to claim 39, wherein

said inner surfaces of said second, third and fourth louvers have reflective finishes.

41. A lighting fixture according to claim 40, wherein

said outer surfaces of said second, third and fourth louvers have light absorbing finishes.

42. A lighting fixture according to claim 41, wherein

said first, second, third and fourth louvers are formed by a plurality of substantially planar segments.

43. A lighting fixture according to claim 40, wherein

said reflector insert is a substantially-parabolic reflector insert formed by a plurality of substantially planar segments.

48. A lighting fixture according to claim 39, wherein

said outer and inner surfaces of said second louver are angled outwardly away from said central aiming axis of said reflector as said second louver approaches said lens cover, and

said inner and outer surfaces of said third louver extend in a direction substantially parallel to said central aiming axis to redirect light from said lamp towards said central aiming axis.

44. A lighting fixture for lighting an area, comprising:

a single-ended lamp having a longitudinal axis extending from a base section to a bulb section;

a bowl-shaped reflector having an interior reflective surface with a central aiming axis and a front peripheral edge defining a front opening;

a lamp mounting socket fixedly coupled to said reflector and electrically coupled to said base section of said lamp for supporting said lamp within said reflector;

a lens cover coupled to said reflector for covering said front opening of said reflector to protect said lamp from weather; and

a glare and spill control assembly coupled to said interior reflective surface of said reflector and behind said lens cover, said glare and spill control assembly including a first arc-shaped louver having an outer surface and an inner surface, said first louver being angled inwardly towards said central aiming axis of said reflector as said first louver approaches said lens cover,

said lamp mounting socket being offset from said central aiming axis of said reflector such that said longitudinal axis of said lamp extends substantially perpendicular to said central aiming axis of said reflector,

said inner surface of said first louver having a light absorbing finish,

said first louver being angled relative to said interior surface of said reflector and said lamp such that a portion of reflected light produced by said lamp and reflected from said interior surface of said reflector passes substantially parallel to said inner and outer surfaces of said first louver,

said glare and spill control assembly further including a second arc-shaped louver having an outer surface and an inner surface, said second louver being spaced inwardly from said first louver towards said central aiming axis,

said outer and inner surfaces of said second louver being angled inwardly towards said central aiming axis of said reflector as said second louver approaches said lens cover,

said glare and spill control assembly further including a third arc-shaped louver spaced inwardly from said first and second louvers towards said central aiming axis, said third louver having an inner surface and an outer surface,

said glare and spill control assembly further including a fourth arc-shaded louver spaced inwardly from said first, second and third louvers towards said central aiming axis, said fourth louver having an inner surface and an outer surface,

said inner and outer surfaces of said fourth louver extend in a direction substantially parallel to said central aiming axis to redirect light from said lamp towards said central aiming axis,

said inner surfaces of said second, third and fourth louvers having reflective finishes,

said glare and spill control assembly further including an arc-shaped light absorbing baffle coupled to said interior surface of said reflector along said front peripheral edge.

45. A lighting fixture according to claim 44, wherein

said light absorbing baffle extends approximately 180°

about said front peripheral edge of said reflector.

46. A lighting fixture for lighting an area, comprising:

a single-ended lamp having a longitudinal axis extending from a base section to a bulb section;

a bowl-shaped reflector having an interior reflective surface with a central aiming axis and a front peripheral edge defining a front opening;

a lamp mounting socket fixedly coupled to said reflector and electrically coupled to said base section of said lamp for supporting said lamp within said reflector, said lamp mounting socket being positioned to maintain said longitudinal axis of said lamp substantially perpendicular to said central aiming axis;

a lens cover coupled to said reflector for covering said front opening of said reflector to protect said lamp from weather; and

a glare and spill control assembly coupled to said interior reflective surface of said reflector and behind said lens cover,

said glare and spill control assembly comprising a first arc-shaped louver being angled outwardly away from said central aiming axis of said reflector as said first louver approaches said lens cover,

a second arc-shaped louver being spaced inwardly from said first louver towards said central aiming axis, said second louver being angled inwardly towards said central aiming axis of said reflector as said second louver approaches said lens cover,

a third arc-shaped louver spaced inwardly from said first and second louvers towards said central aiming axis, said third louver extending in a direction substantially parallel to said central aiming axis to redirect light from said lamp towards said central aiming axis,

each of said arc-shaped louvers being positioned symmetrically about said central aiming axis.

49. A lighting fixture for lighting an area, comprising:

a single-ended lamp having a longitudinal axis extending from a base section to a bulb section;

a bowl-shaped reflector having an interior reflective surface with a central aiming axis and a front peripheral edge defining a front opening;

a lamp mounting socket fixedly coupled to said reflector and electrically coupled to said base section of said lamp for supporting said lamp within said reflector;

a lens cover coupled to said reflector for covering said front opening of said reflector to protect said lamp from weather; and

a glare and spill control assembly coupled to said interior reflective surface of said reflector and behind said lens cover, said glare and spill control assembly including a first arc-shaped louver having an outer surface and an inner surface, said first louver being angled inwardly towards said central aiming axis of said reflector as said first louver approaches said lens cover,

said glare and spill control assembly further including an arc-shape light absorbing baffle coupled to said interior surface of said reflector along said front peripheral edge.