Patent US3679934A successfully refreshed from Google Patents.
US3679934A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic restarting laser power supply
Assignee: HP Inc
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Filing: 1970-02-05
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Granted: 1972-07-25
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Expires: 1990-02-05
Abstract
Abstract A gas laser is connected in series with a diode and a power supply for maintaining the discharge in the laser. When the laser extinguishes, a capacitor connected in parallel with the diode is charged by an additional power supply to provide the additional voltage necessary to restart the laser.
Inventors
- 👤 John N Dukes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:55
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/09; H01S3/097; H05; H05B; H05B41/00; H05B41/14; H05B41/30; H05B41/34; Y; Y10; Y10S; Y10S315/00; Y10S315/05
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
111 words
An apparatus for starting, maintaining and automatically restarting the discharge in a gaseous discharGe tube comprising: a first source of power for maintaining tube discharge; a ballast device; a unidirectional conducting device, comprising at least two series connected rectifying devices, connected in series with the first source of power, the tube and the ballast device, the unidirectional conducting device being poled to conduct during tube discharge; an energy storage Device connected in parallel with the unidirectional conducting device; a second source of power for supplying a.c. power; and a voltage doubler circuit connected to the second source of power, the circuit including the unidirectional conducting device and the energy storage device.
Claim 2
Independent Claim
111 words
An apparatus for starting, maintaining and automatically restarting the discharge in a gaseous discharGe tube comprising: a first source of power for maintaining tube discharge; a ballast device; a unidirectional conducting device, comprising at least two series connected rectifying devices, connected in series with the first source of power, the tube and the ballast device, the unidirectional conducting device being poled to conduct during tube discharge; an energy storage Device connected in parallel with the unidirectional conducting device; a second source of power for supplying a.c. power; and a voltage doubler circuit connected to the second source of power, the circuit including the unidirectional conducting device and the energy storage device.
Claim 3
Dependent Claim
15 words
An apparatus as in claim 1 wherein the gaseous discharge tube is a gas laser.
Claim 4
Independent Claim
146 words
An apparatus for starting, maintaining and automatically restarting the discharge in a gaseous discharge tube comprising: a power supply connectable to a source of a.c. power and having a first output for supplying power to maintain tube discharge and a second output for supplying a.c. power, the power supply including rectifying means connected to the first output and a filter device connected across the first output; a ballast device; a unidirectional conductive device comprising at least two series connected rectifying devices connected in series with the first output of the power supply, the tube and the ballast device, the unidirectional conducting device being poled to conduct during tube discharge; an energy storage device connected in parallel with the unidirectional conducting device; a voltage doubler circuit connected to the second output of the power supply, the circuit including the unidirectional conducting device and the energy storage device.
Claim 5
Independent Claim
146 words
An apparatus for starting, maintaining and automatically restarting the discharge in a gaseous discharge tube comprising: a power supply connectable to a source of a.c. power and having a first output for supplying power to maintain tube discharge and a second output for supplying a.c. power, the power supply including rectifying means connected to the first output and a filter device connected across the first output; a ballast device; a unidirectional conductive device comprising at least two series connected rectifying devices connected in series with the first output of the power supply, the tube and the ballast device, the unidirectional conducting device being poled to conduct during tube discharge; an energy storage device connected in parallel with the unidirectional conducting device; a voltage doubler circuit connected to the second output of the power supply, the circuit including the unidirectional conducting device and the energy storage device.
Claim 6
Dependent Claim
103 words
An apparatus as in claim 3 wherein: the power supply has a third output for supplying a.c. power; the rectifying means comprises a full wave diode bridge including four diodes, the second output being connected across one diode of the bridge and the third output being connected across another nonadjacent diode of the bridge; and there is an additional voltage doubler circuit connected to the third output of the power supply, the additional circuit including an additional unidirectional conducting device connected in series with the previously recited unidirectional conducting device, the first output of the power supply, the tube, and the ballast device.
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) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |