Patent US4677631A successfully refreshed from Google Patents.
US4677631A
Expired / Lapsed
US
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Gas laser power supply apparatus
Assignee: LASER ECOSSE Ltd
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Filing: 1985-09-30
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Granted: 1987-06-30
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Expires: 2005-09-30
Abstract
Abstract Power supply apparatus for a gas laser discharge tube (10) having anode and cathode electrodes (11 and 12) comprises a first power supply (13) operable to satisfy the running power requirements of the discharge tube. A second power supply (16) is also provided and is operable to generate a voltage which, when connected in series with the output of the first power supply (13) causes the initiation of a discharge in the discharge tube (10). A spark gap (17) is operable to connect the outputs of the two power supplies in series with one another when the discharge is to be initiated.
Inventors
- 👤 James Pithie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:41
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/53; H03K3/55; H03K3/537
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
65 words
Gas laser power supply apparatus which includes a first power supply which generates a current and a first voltage output sufficient to maintain an electric discharge in a gas laser discharge tube, a second power supply which generates a second voltage output, a spark gap connecting the voltage output of said first and second power supplies in series thereby causing initiation of said electric discharge.
Claim 2
Dependent Claim
65 words
Gas laser power supply apparatus which includes a first power supply which generates a current and a first voltage output sufficient to maintain an electric discharge in a gas laser discharge tube, a second power supply which generates a second voltage output, a spark gap connecting the voltage output of said first and second power supplies in series thereby causing initiation of said electric discharge.
Claim 3
Dependent Claim
16 words
Apparatus as claimed in claim 5 in which the spark gap comprises a triggered spark gap.
Claim 4
Dependent Claim
24 words
Apparatus as claimed in claim 5 in which the first and second power supplies comprise first and second sections of a voltage multiplier circuit.
Claim 5
Dependent Claim
17 words
Apparatus as claimed in claim 3 in which the voltage multiplier circuit is of the Cockroft-Walton type.
References Cited (Backward Citations)
GB444307A
Cited
GB1080898A
Cited
GB1161948A
Cited
GB1276814A
Cited
GB1520840A
Cited
GB1598546A
Cited
WO1980000776A1
Cited
EP0043112A2
Cited
WO1983001555A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-06-29 | 1990-12-29 | 1991-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-29 | 1994-12-29 | 1995-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-29 | 1998-12-29 | 1999-06-30 | $7700.00 | Window Closed / Lapsed |