US4567403A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High pressure discharge lamp with incorporated starter
Assignee: Iwasaki Electric Co Ltd
•
Filing: 1982-02-18
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Granted: 1986-01-28
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Expires: 2002-02-18
Abstract
Abstract In a high pressure discharge lamp device provided with an inductive stabilizer and a starting circuit consisting of a serial circuit of a resistor and a bimetal switch, a pulse waveform conversion circuit is arranged therein to reduce the pulse peak of the starting voltage and also broaden the pulse width of the starting voltage. The pulse waveform conversion circuit comprises a serial circuit of a resistor and a switching element, such as micro-gap element, which operates at a voltage lower than the starting voltage of the discharge lamp but higher than the secondary load-free voltage of the stabilizer.
Inventors
- 👤 Yoshio Ohtagaki
- 👤 Masafumi Ochi
- 👤 Motonobu Masui
- 👤 Kanichi Tachibana
- 👤 Akio Uchida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:19
CPC Classifications
H; H05; H05B; H05B41/00; H05B41/02; H05B41/04
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
172 words
A discharge lamp device comprising a discharge lamp, an inductive stabilier connected in series with discharge lamp, starting circuit means, including a resistor and a bimetal switch in series connected to said discharge lamp for providing a starting voltage waveform including repetitive high voltage pulses, and pulse wave conversion means having a micro-gap element comprising an insulating member of high relative dielectric constant, a conductive layer divided into separate zone formed on said insulating member and electrodes respectively connected to separate ones of said zones, and air-tight container enclosing the micro-gap element and filled with a rare or inert gas, and a resistor connected in series with the micro-gap element, the micro-gap element being constructed to be rendered conductive at a voltage lower than the starting voltage of the discharge lamp but higher than the secondary load-free voltage of the stabilizer, and the resistor having a value such that said pulse waveform conversion means converts said starting voltage waveform from an oscillatory waveform to a damped waveform having wider half value width.
Claim 2
Dependent Claim
172 words
A discharge lamp device comprising a discharge lamp, an inductive stabilier connected in series with discharge lamp, starting circuit means, including a resistor and a bimetal switch in series connected to said discharge lamp for providing a starting voltage waveform including repetitive high voltage pulses, and pulse wave conversion means having a micro-gap element comprising an insulating member of high relative dielectric constant, a conductive layer divided into separate zone formed on said insulating member and electrodes respectively connected to separate ones of said zones, and air-tight container enclosing the micro-gap element and filled with a rare or inert gas, and a resistor connected in series with the micro-gap element, the micro-gap element being constructed to be rendered conductive at a voltage lower than the starting voltage of the discharge lamp but higher than the secondary load-free voltage of the stabilizer, and the resistor having a value such that said pulse waveform conversion means converts said starting voltage waveform from an oscillatory waveform to a damped waveform having wider half value width.
Claim 3
Dependent Claim
35 words
A discharge lamp device according to claim 1, wherein said resistor of said starting circuit means comprises an incandescent filament and wherein said resistor of said pulse waveform conversion means comprises a carbon film resistor.
Claim 4
Dependent Claim
15 words
A discharge lamp device according to claim 1, wherein said resistors are thick-film metal resistors.
Claim 5
Dependent Claim
19 words
A discharge lamp device according to claim 1, wherein at least one of said resistors is a variable resistor.
Claim 6
Dependent Claim
18 words
A discharge lamp device according to claim 1, wherein said discharge lamp is a high pressure sodium lamp.
Claim 7
Dependent Claim
21 words
A discharge lamp device according to claim 1, wherein said starting circuit means is connected in parallel with said discharge lamp.
Claim 8
Dependent Claim
21 words
A discharge lamp device according to claim 1, wherein said pulse waveform conversion means is connected across said starting circuit means.
Claim 9
Dependent Claim
20 words
A discharge lamp device according to claim 1, wherein said pulse waveform conversion means is connected across said bimetal switch.
Claim 10
Dependent Claim
19 words
A discharge lamp device according to claim 1, wherein said pusle waveform conversion means is connected across said stabilizer.
Claim 11
Dependent Claim
27 words
A discharge lamp device according to claim 1, wherein the resistance of the resistor of said pulse waveform conversion means has a value not exceeding 5,000 ohms.
References Cited (Backward Citations)
US2570780A
Cited
US3740686A
Cited
US3889222A
Cited
US4064416A
Cited
JPS564198A
Cited
US4137483A
Cited
US4135114A
Cited
JPS54155673A
Cited
US4206385A
Cited
US4316122A
Cited
JPS5657249A
Cited
US4322658A
Cited
JPS56167256A
Cited
US4379982A
Cited
US4400754A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-01-27 | 1989-07-29 | 1990-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-27 | 1993-07-29 | 1994-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-27 | 1997-07-29 | 1998-01-28 | $7700.00 | Window Closed / Lapsed |