Portable fluorescent lamp for use in special applications
First Claim
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1. An electrodeless lamp for use in special applications such as hazardous or wet environments, comprising:
- a light-transmissive envelope enclosing a gaseous medium adapted to sustain an electric discharge and luminous phosphors disposed on interior surfaces of said envelope and adapted to emit visible light when excited by ultraviolet radiation emitted from said gaseous medium;
a source of RF energy adapted to receive electrical power for generating an RF electrical signal;
an energy coupler electrically coupled to the output of said RF source and for being excited by said RF signal, said coupler being shaped to conform to the shape of a portion of said envelope and to cooperate therewith such that said coupler may be assembled to said envelope in energy-transfer relation; and
potting material encasing said RF source and said coupler and conforming to the shape of said coupler as it is accommodated by said envelope;
said lamp being characterized in that said envelope is removably assembled to said coupler in said energy-transfer relationship and may readily be removed and replaced.
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Abstract
A fluorescent lamp for use in special applications includes an electrodeless envelope of glass or other light transmissive material carrying fluorescent material within the envelope. An RF energy source and coupler are embedded in epoxy as an integral power unit, thereby isolating the power unit from the hazardous environment. The power unit and the envelope are shaped in complementary form such that the coupler and envelope are in energy-transfer relation to excite the lamp, but the envelope may be removed from the power unit to re-lamp the fixture.
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Citations
10 Claims
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1. An electrodeless lamp for use in special applications such as hazardous or wet environments, comprising:
a light-transmissive envelope enclosing a gaseous medium adapted to sustain an electric discharge and luminous phosphors disposed on interior surfaces of said envelope and adapted to emit visible light when excited by ultraviolet radiation emitted from said gaseous medium; a source of RF energy adapted to receive electrical power for generating an RF electrical signal; an energy coupler electrically coupled to the output of said RF source and for being excited by said RF signal, said coupler being shaped to conform to the shape of a portion of said envelope and to cooperate therewith such that said coupler may be assembled to said envelope in energy-transfer relation; and potting material encasing said RF source and said coupler and conforming to the shape of said coupler as it is accommodated by said envelope; said lamp being characterized in that said envelope is removably assembled to said coupler in said energy-transfer relationship and may readily be removed and replaced. - View Dependent Claims (2, 3, 4, 5)
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6. An electrodeless fluorescent lamp for use in special applications such as hazardous or wet environments, comprising:
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a light-transmissive envelope enclosing a gaseous medium adapted to sustain an electric discharge and luminous phosphors disposed on interior surfaces of said envelope and adapted to emit visible light when excited by ultraviolet radiation emitted from said gaseous medium, said envelope being shaped to define a cavity for receiving an energy coupler; a source of RF energy adapted to receive electrical power for generating an RF electrical signal; an electromagnetic coupler integrally secured with said RF signal, said coupler being shaped to conform to at least a portion of said envelope and to cooperate therewith such that said coupler may be assembled to said envelope in energy-transfer relation; and potting material encasing said RF source and said coupler and conforming to the shape of said coupler as it is accommodated by said envelope; and
characterized in that said envelope is removably assembled to said coupler in said energy-transfer relationship and may readily be replaced. - View Dependent Claims (7)
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8. An electrodeless fluorescent lamp for use in special applications such as hazardous or wet environments, comprising:
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a light-transmissive envelope in the form of a biaxial tube having adjacent ends, said envelope enclosing a gaseous medium adapted to sustain an electric discharge and having luminous phosphors disposed on interior surfaces of said envelope and adapted to emit visible light when excited by ultraviolet radiation emitted from said gaseous medium; a source of RF energy adapted to receive electrical power for generating an RF electrical signal; a capacitive coupler integrally secured with said RF source and electrically connected to the output thereof for being excited by said RF signal, said coupler being shaped to conform to the adjacent ends of said tube and to cooperate therewith such that said coupler may be removeably assembled to said envelope in energy-transfer relation; and potting material encasing said RF source and said coupler and conforming to the shape of said coupler as it is accommodated by said envelope. - View Dependent Claims (9, 10)
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Specification