US3619600A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Direct current fluorescent illuminating device
Assignee: General Manufacturing Inc
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Filing: 1969-04-09
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Granted: 1971-11-09
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Expires: 1989-04-09
Abstract
Abstract A portable illuminating device utilizing a fluorescent lamp tube adapted to be powered by direct current and particularly suitable for use with automobiles, boats, and the like. The device basically consists of a light-transmitting housing tube of synthetic material which houses the lamp, and a direct current oscillator circuit is located at one end of the housing tube wherein the overall configuration of the device is cylindrical as to be readily handled and stored. The components of the circuit are arranged and constructed to permit accommodation to the configuration of the housing tube. Additionally, a metallic reflector is disposed adjacent the lighting tube which functions as a circuit output conductor to minimize the voltage required to initiate an arc in the lamp.
Inventors
- 👤 Roger L Kryder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:23
CPC Classifications
F; F21; F21L; F21L14/00; F21L14/02; F21L14/026
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
109 words
A portable, fluorescent, illuminating device energized by direct current comprising, in combination, an elongated housing having an axially extending light-transmitting portion and first and second ends, a fluorescent lamp tube within said housing in axial alignment with said light-transmitting portion, circuit housing means located at said housing first end, a direct current oscillator circuit within said circuit housing means having a high-frequency output, direct current supply conductors connected to said circuit and conductors connecting said high-frequency output to said lamp tube, one of said high-frequency output conductors comprising a metallic reflector disposed adjacent said lamp tube to decrease the voltage required to strike an arc in said lamp tube.
Claim 2
Dependent Claim
109 words
A portable, fluorescent, illuminating device energized by direct current comprising, in combination, an elongated housing having an axially extending light-transmitting portion and first and second ends, a fluorescent lamp tube within said housing in axial alignment with said light-transmitting portion, circuit housing means located at said housing first end, a direct current oscillator circuit within said circuit housing means having a high-frequency output, direct current supply conductors connected to said circuit and conductors connecting said high-frequency output to said lamp tube, one of said high-frequency output conductors comprising a metallic reflector disposed adjacent said lamp tube to decrease the voltage required to strike an arc in said lamp tube.
Claim 3
Dependent Claim
132 words
A portable, fluorescent, illuminating device energized by direct current comprising, in combination, an elongated, cylindrical, housing tube of light-transmitting material having first and second ends, a fluorescent lamp tube within said housing tube, circuit hOusing means located within said housing tube first end whereby said entire device is of a cylindrical configuration, a direct current oscillator circuit within said circuit housing means having a high-frequency output, said oscillator circuit including a pair of switching transistors, a metal heat sink located within said circuit housing means having a flat portion and depending arcuate portions corresponding to the configuration of said cylindrical housing tube, said transistors being mounted upon said flat portion of said heat sink, direct current supply conductors connected to said circuit, and conductors connecting said high-frequency output to said lamp tube.
Claim 4
Dependent Claim
132 words
A portable, fluorescent, illuminating device energized by direct current comprising, in combination, an elongated, cylindrical, housing tube of light-transmitting material having first and second ends, a fluorescent lamp tube within said housing tube, circuit hOusing means located within said housing tube first end whereby said entire device is of a cylindrical configuration, a direct current oscillator circuit within said circuit housing means having a high-frequency output, said oscillator circuit including a pair of switching transistors, a metal heat sink located within said circuit housing means having a flat portion and depending arcuate portions corresponding to the configuration of said cylindrical housing tube, said transistors being mounted upon said flat portion of said heat sink, direct current supply conductors connected to said circuit, and conductors connecting said high-frequency output to said lamp tube.
Claim 5
Dependent Claim
134 words
A portable, fluorescent, illuminating device energized by direct current comprising, in combination, an elongated cylindrical, housing tube of light transmitting material having first and second ends, a fluorescent lamp tube within said housing tube, circuit housing means located within said housing tube first end whereby said entire device is of a cylindrical configuration, a direct current oscillator circuit within said circuit housing means having a high frequency output, said oscillator circuit including an annular ferrite core having an axis, electrical conductor windings wound upon said core, said core being of an outer diameter less than the inner diameter of said cylindrical housing tube and substantially coaxially aligned with the axis of said cylindrical housing tube, direct current supply conductors connected to said circuit, and conductors connecting said high frequency output to said lamp tube.
Claim 6
Dependent Claim
134 words
A portable, fluorescent, illuminating device energized by direct current comprising, in combination, an elongated cylindrical, housing tube of light transmitting material having first and second ends, a fluorescent lamp tube within said housing tube, circuit housing means located within said housing tube first end whereby said entire device is of a cylindrical configuration, a direct current oscillator circuit within said circuit housing means having a high frequency output, said oscillator circuit including an annular ferrite core having an axis, electrical conductor windings wound upon said core, said core being of an outer diameter less than the inner diameter of said cylindrical housing tube and substantially coaxially aligned with the axis of said cylindrical housing tube, direct current supply conductors connected to said circuit, and conductors connecting said high frequency output to said lamp tube.
Claim 7
Dependent Claim
117 words
A portable, fluorescent, illuminating device energized by direct current comprising, in combination, an elongated, cylindrical, housing tube of light-transmitting material having first and second ends, a fluorescent lamp tube within said housing tube, circuit housing means located within said housing tube first end whereby said entire device is of a cylindrical configuration, a direct current oscillator circuit within said circuit housing means having a high-frequency output, a metallic reflector disposed adjacent said lamp tube extending the length thereof, direct current supply conductors connected to said circuit, conductors connecting said high-frequency output to said lamp tube, said reflector constituting one of said high-frequency output conductors thereby decreasing the voltage required to strike an arc in said lamp tube.
Claim 8
Dependent Claim
117 words
A portable, fluorescent, illuminating device energized by direct current comprising, in combination, an elongated, cylindrical, housing tube of light-transmitting material having first and second ends, a fluorescent lamp tube within said housing tube, circuit housing means located within said housing tube first end whereby said entire device is of a cylindrical configuration, a direct current oscillator circuit within said circuit housing means having a high-frequency output, a metallic reflector disposed adjacent said lamp tube extending the length thereof, direct current supply conductors connected to said circuit, conductors connecting said high-frequency output to said lamp tube, said reflector constituting one of said high-frequency output conductors thereby decreasing the voltage required to strike an arc in said lamp tube.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-08 | 1975-05-10 | 1975-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-08 | 1979-05-10 | 1979-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-08 | 1983-05-10 | 1983-11-09 | $7700.00 | Window Closed / Lapsed |