Fluorescent lamp adapter with shell form ballast

• US 5,608,289 A
• Filed: 07/31/1995
• Issued: 03/04/1997
• Est. Priority Date: 11/12/1993
• Status: Expired due to Fees

• Current Assignee: Lumatech Corporation
• Original Assignee: Lumatech Corporation
• Inventors: O'Carroll, James G., Pelton, Bruce A.
• Primary Examiner(s): Neyzari, Ali
• Application Number:
  US08/509,656
• Time in Patent Office: 582 Days
• Field of Search: 315/58, 315/57, 315/56, 315/62, 315/71, 315/59, 315/91, 315/50, 313/318, 313/315, 313/317, 362/216, 362/260
• US Class Current: 315/58
• CPC Class Codes: F21S 8/02 of recess-mounted type, e.g. downlighters specially adapted for vehicle exteriors F21S41/00-F21S45/00
• CPC Class Codes: F21S 8/04 intended only for mounting on a ceiling or the like overhead structures F21S8/02 takes precedence; details of ceiling bases F21V21/03
• CPC Class Codes: F21V 19/006 of point-like light sources, e.g. incandescent or halogen lamps, with screw-threaded or bayonet base of sources having contact pins, wires or blades F21V19/0005; of LEDs or sources mounted on printed-circuit board F21V19/001
• CPC Class Codes: F21V 19/0095 of U-shaped tubular light sources, e.g. compact fluorescent tubes
• CPC Class Codes: F21V 23/02 the elements being transformers, impedances or power supply units, e.g. a transformer with a rectifier
• CPC Class Codes: F21Y 2103/37 U-shaped
• CPC Class Codes: H01J 61/327 "Compact"-lamps, i.e. lamps having a folded discharge path
• CPC Class Codes: H01J 61/56 One or more circuit elements structurally associated with the lamp
• CPC Class Codes: H05B 41/00 Circuit arrangements or apparatus for igniting or operating discharge lamps structurally associated with the discharge lamps H01J61/54, H01J61/56

Abstract

A shell form ballast has rounded corners for positioning inside a ballast housing for use with a fluorescent light bulb adapter. The ballast has rounded outer corners to meet both long-term life and power requirements, and spatial design constraints of a fluorescent lamp adapter assembly for use in an incandescent lighting fixture, and particularly for use in a recessed incandescent lighting fixture. The rounded outer corners of the ballast provide the ability for the shell form ballast to fit into a hollow housing for use in the recessed lighting fixture while simultaneously providing the shell form ballast a snug fit in the hollow housing, thereby minimizing gap growth.

Claims

1. A device, comprising:

(a) a ballast, comprising;

a center segment;

an electrically conducting coil wound about said center segment capable of conducting an electrical current therethrough;

a perimeter portion substantially surrounding said center segment, said perimeter portion having four side members, each side member having opposing distal ends wherein each of said side members'"'"' distal ends meets with one of an adjacent side members'"'"' distal ends, said meeting ends together forming a rounded corner with a curved peripheral contour, and wherein said perimeter portion includes at least one air gap having a predetermined thickness, said air gap being capable of enlargement when an electrical current is applied to said electrically conducting coil; and

(b) a lamp adapter assembly which is adapted for use in an incandescent lighting socket, including electrical connection elements which interconnect said electrically conducting coil with said incandescent lighting socket and a lamp positionable within said lamp adapter assembly and wherein said lamp adapter assembly is configured to tightly position said perimeter portion of said ballast device therein in a manner which avoids said enlargement of said air gap to maintain said air gap at said predetermined thickness.

2. A device as recited in claim 1, further comprising a second electrically conducting coil wound about said center segment.

3. A device as recited in claim 1, wherein said device is positionable in a fluorescent lamp adapter assembly for use with a fluorescent lamp, said fluorescent lamp adapter assembly being adapted to fit into an incandescent lighting fixture, and wherein said coil and said perimeter portion have sufficient combined surface area to provide the ability to control electrical energy to operate said fluorescent lamp resident in said fluorescent.

4. A device as recited in claim 2, wherein said device is positionable in a fluorescent lamp adapter assembly for use with a fluorescent lamp, said fluorescent lamp adapter assembly being adapted to fit into an incandescent lighting fixture, and wherein said coils and said perimeter portion have sufficient combined surface area to provide the ability to control electrical energy to operate said fluorescent lamp resident in said fluorescent.

5. A device as recited in claim 1, wherein said device further comprises bracing means attachable to at least two of said four side members, said bracing means providing the ability to aid in securing said device within a fluorescent lamp adapter assembly.

6. A device for use with a compact fluorescent lamp, comprising:

(a) a ballast, comprising;

a rectangular periphery portion having interior and exterior surfaces and having rounded exterior corners and at least one air gap having a predetermined thickness;

a center segment portion emanating inward from one of said interior surfaces of said rectangular periphery, said center segment portion thereby substantially surrounded by said rectangular periphery portion;

at least one electrically conducting coil wound around said center segment portion, said coil and said rectangular periphery portion having sufficient combined surface area such that when an electrical current passes through said coil, the output current generated therefrom is controlled to power said compact fluorescent lamp; and

wherein said air gap is capable of growth when said electrical current passes through said coil;

(b) a fluorescent lamp adapter assembly which is adapted for use in an incandescent lighting socket and which houses said ballast to tightly position said rectangular periphery portion therein and in a manner which avoids said growth of said air gap to maintain said air gap at said predetermined thickness; and

(c) electrical interconnection elements for establishing interconnections with said incandescent lighting socket and with said compact fluorescent lamp positioned in said fluorescent lamp adapter assembly.

7. A device as recited in claim 6, further comprising a second electrically conducting coil wound about said center segment portion.

8. A device as recited in claim 6, wherein said device is positionable in a fluorescent lamp adapter assembly for use with a fluorescent lamp, said fluorescent lamp adapter assembly being adapted to fit into an incandescent lighting fixture, and wherein said coil and said rectangular periphery portion have sufficient combined surface area to provide the ability to control electrical energy to operate said compact fluorescent lamp resident in said fluorescent lamp adapter assembly.

9. A device as recited in claim 7, wherein said device is positionable in a fluorescent lamp adapter assembly for use with a fluorescent lamp, said fluorescent lamp adapter assembly being adapted to fit into an incandescent lighting fixture, and wherein said coils and said rectangular periphery portion have sufficient combined surface area to provide the ability to control electrical energy to operate said compact fluorescent lamp resident in said fluorescent lamp adapter assembly.

10. A device as recited in claim 6, wherein said device further comprises bracing means attachable to said rectangular periphery portion, said bracing means providing the ability to aid in securing said device within a fluorescent lamp adapter assembly.

11. A fluorescent lamp adapter assembly for adapting a fluorescent lamp to an incandescent lighting fixture, comprising:

(a) a housing;

(b) a ballast including a center segment having wrapped thereon at least one coil, said center segment substantially surrounded by a peripheral portion having exterior corners which are rounded, said peripheral portion including at least one air gap having a predetermined thickness, said air gap being capable of growth during use of said ballast, said ballast tightly positionable within said housing in a manner which avoids said growth of said air gap to maintain said air gap at said predetermined thickness;

(c) first connector means in communication with said at least one coil for establishing electrical interconnection between said ballast and said incandescent lighting fixture; and

(d) second connector means in communication with said coil for establishing electrical interconnection between said ballast and said fluorescent lamp.

12. An assembly as recited in claim 11, further comprising a second electrically conducting coil wound about said center segment.

13. An assembly as recited in claim 11, wherein said device is positionable in a fluorescent lamp adapter assembly for use with said fluorescent lamp, said fluorescent lamp adapter assembly being adapted to fit into an incandescent lighting fixture, and wherein said coil and said peripheral portion have sufficient combined surface area to provide the ability to control electrical energy to operate said fluorescent lamp resident in said fluorescent lamp adapter assembly.

14. An assembly as recited in claim 12, wherein said device is positionable in a fluorescent lamp adapter assembly for use with said fluorescent lamp, said fluorescent lamp adapter assembly being adapted to fit into an incandescent lighting fixture, and wherein said coils and said peripheral portion have sufficient combined surface area to provide the ability to control electrical energy to operate said fluorescent lamp resident in said fluorescent lamp adapter assembly.

15. An assembly as recited in claim 11, wherein said device further comprises bracing means attachable to said peripheral portion, said bracing means providing the ability to aid in securing said device within said housing.

16. An adapter for adapting a fluorescent lamp to an incandescent lighting fixture, comprising:

(a) a housing;

(b) a ballast positioned within the housing, wherein the ballast has a configuration which includes at least one air gap of a predetermined thickness, said air gap being capable of growth during the use of said ballast, and has a shape such that one or more surfaces of the ballast contact the housing to hold the ballast in a fixed relationship to the housing and in a manner which avoids said growth of said air gap to maintain said air gap at said predetermined thickness; and

(c) an electrically conducting coil, the coil being held within the ballast in a fixed relationship to the ballast.

17. An adapter as in claim 16, wherein:

the housing has a substantially circular interior shape into which the ballast is positioned;

the shape of the ballast is substantially rectangular when viewed in a direction parallel to the toroidal axis; and

the corners of the rectangular shape are rounded to fit snugly against the housing.

18. An adapter as in claim 17, further comprising a plurality of braces, each brace positioned between the housing and a side of the substantially rectangular shape of the ballast to aid in securing the ballast within the housing.