Fluorescent lamp
First Claim
Patent Images
1. A fluorescent lamp comprising:
- an envelope including a hollow globe member made of at least a translucent material and defining an open end, and a base member including a screw base, said base member attached to and covering said open end of said globe member, said globe and said base members together defining an inner space;
a fluorescent tube comprising a light emitting tube section which is encased in said envelope and which is formed in a folded U-shape having two ends, a U-shaped end portion and a pair of leg portions parallel to said U-shaped end portion and respectively extending from said two ends, a pair of electrodes respectively formed at said two ends, an exhaust tube protruding from at least one of said two ends, and a pair of lead wires connected to said electrodes and respectively extending from said two ends;
plate means disposed in said envelope for dividing said inner space of said envelope into a globe side space and a base side space for supporting said fluorescent tube at least at said two ends thereof so that most of said fluorescent tube is enclosed within said globe side space, said plate means including means permitting a portion of said fluorescent tube to extend into said base side space through said plate means, said portion thereby forming a cooling area on said fluorescent tube;
reactance ballast means provided on said plate means enclosed in said globe side space and connected to said lead wires for regulating current flowing through said fluorescent tube; and
cooling means defining openings in said envelope for expelling heat generated by said fluorescent tube and said reactance ballast means to the exterior of said envelope.
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Accused Products
Abstract
An envelope comprises a bowl-shaped component with a screw base and a bulb of a translucent material. A fluorescent tube bent a plurality of times and a reactance ballast are encased in the envelope. This fluorescent tube and the reactance ballast are fixed to a supporting plate. The bend part of the fluorescent tube protrudes through the supporting plate toward the side of the bowl-shaped component. A plurality of openings are formed in the bowl-shaped component at parts corresponding to the bend part of the fluorescent tube. A plurality of openings are formed in the supporting plate at parts near the reactance ballast fixed to the supporting plate.
54 Citations
22 Claims
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1. A fluorescent lamp comprising:
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an envelope including a hollow globe member made of at least a translucent material and defining an open end, and a base member including a screw base, said base member attached to and covering said open end of said globe member, said globe and said base members together defining an inner space; a fluorescent tube comprising a light emitting tube section which is encased in said envelope and which is formed in a folded U-shape having two ends, a U-shaped end portion and a pair of leg portions parallel to said U-shaped end portion and respectively extending from said two ends, a pair of electrodes respectively formed at said two ends, an exhaust tube protruding from at least one of said two ends, and a pair of lead wires connected to said electrodes and respectively extending from said two ends; plate means disposed in said envelope for dividing said inner space of said envelope into a globe side space and a base side space for supporting said fluorescent tube at least at said two ends thereof so that most of said fluorescent tube is enclosed within said globe side space, said plate means including means permitting a portion of said fluorescent tube to extend into said base side space through said plate means, said portion thereby forming a cooling area on said fluorescent tube; reactance ballast means provided on said plate means enclosed in said globe side space and connected to said lead wires for regulating current flowing through said fluorescent tube; and cooling means defining openings in said envelope for expelling heat generated by said fluorescent tube and said reactance ballast means to the exterior of said envelope. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification