Patent US3626243A successfully refreshed from Google Patents.
US3626243A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Instantaneous starter device for a discharge lamp employing a diode thyristor
Assignee: Panasonic Holdings Corp
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Filing: 1969-08-21
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Granted: 1971-12-07
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Expires: 1989-08-21
Abstract
Abstract A starter device for a discharge lamp instantaneously lighting a fluorescent discharge tube; connecting in parallel with said fluorescent discharge tube a starter circuit consisting of a pulse transformer, a capacitor, and a symmetrical diode thyristor or a reverse blocking diode thyristor having a breakover voltage VBO lower than the rated power source voltage but higher than the tube voltage of said fluorescent discharge tube.
Inventors
- 👤 Shigeo Koyama
- 👤 Masao Yasuda
- 👤 Toru Takei
- 👤 Yasutaka Kawai
- 👤 Takeshi Matsushima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:04
CPC Classifications
H; H05; H05B; H05B41/00; H05B41/02; H05B41/04; H05B41/042; H05B41/044; H05B41/046; H05B41/14; H05B41/16; H05B41/18; Y; Y10; Y10S; Y10S315/00; Y10S315/05
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
152 words
A starter device for a fluorescent discharge lamp having first and second cathodes, each of said cathodes having first and second ends, comprising a. a current limiting ballast connected in series with an electric power source between the first ends of said first and second cathodes, b. a pulse transformer having primary and secondary windings wound in the same direction, each of said windings having first and second ends, c. first conductive means coupling a first end of the secondary winding of said transformer to the second end of said first cathode, the second end of said secondary winding being connected to the second end of said primary winding, d. a reverse blocking diode thyristor, e. a capacitor coupled in series with said thyristor across the primary winding of said transformer, and f. second conductive means coupling the junction of said thyristor and capacitor to the second end of said second cathode.
Claim 2
Dependent Claim
152 words
A starter device for a fluorescent discharge lamp having first and second cathodes, each of said cathodes having first and second ends, comprising a. a current limiting ballast connected in series with an electric power source between the first ends of said first and second cathodes, b. a pulse transformer having primary and secondary windings wound in the same direction, each of said windings having first and second ends, c. first conductive means coupling a first end of the secondary winding of said transformer to the second end of said first cathode, the second end of said secondary winding being connected to the second end of said primary winding, d. a reverse blocking diode thyristor, e. a capacitor coupled in series with said thyristor across the primary winding of said transformer, and f. second conductive means coupling the junction of said thyristor and capacitor to the second end of said second cathode.
Claim 3
Dependent Claim
16 words
A starter device as defined by claim 1 wherein said second conductive means comprise a diode.
Claim 4
Dependent Claim
152 words
A starter device for a fluorescent discharge lamp having a first and second cathodes, each of said cathodes having first and second ends, comprising a. a current limiting ballast connected in series with an electric power source between the first ends of said first and second cathodes, b. a pulse transformer having primary and secondary windings wound in the same direction, each of said windings having first and second ends, c. first conductive means coupling a first end of the secondary winding of said transformer to the second end of said first cathode, the second end of said secondary winding being connected to the second end of said primary winding, d. a symmetrical diode thyristor, e. a capacitor coupled in series with said thyristor across the primary winding of said transformer, and f. a diode only coupling the junction of said thyristor and capacitor to the second end of said second cathode.
Claim 5
Dependent Claim
152 words
A starter device for a fluorescent discharge lamp having a first and second cathodes, each of said cathodes having first and second ends, comprising a. a current limiting ballast connected in series with an electric power source between the first ends of said first and second cathodes, b. a pulse transformer having primary and secondary windings wound in the same direction, each of said windings having first and second ends, c. first conductive means coupling a first end of the secondary winding of said transformer to the second end of said first cathode, the second end of said secondary winding being connected to the second end of said primary winding, d. a symmetrical diode thyristor, e. a capacitor coupled in series with said thyristor across the primary winding of said transformer, and f. a diode only coupling the junction of said thyristor and capacitor to the second end of said second cathode.
Claim 6
Dependent Claim
24 words
A second device as defined by claim 3 wherein said first conductive means comprises an auxiliary winding inductively coupled to said current limiting ballast.
References Cited (Backward Citations)
CA466135A
Cited
US3476976A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-06 | 1975-06-07 | 1975-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-06 | 1979-06-07 | 1979-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-06 | 1983-06-07 | 1983-12-07 | $7700.00 | Window Closed / Lapsed |