US4242648A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High power electrode and feedthrough assembly for high temperature lasers
Assignee: Westinghouse Electric Corp
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Filing: 1978-12-29
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Granted: 1980-12-30
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Expires: 1998-12-29
Abstract
Abstract A double sealed technique in an evacuated quartz jacket produces an electrical feedthrough assembly suitable for use in sealed-off, pulse, longitudinal discharge lasers compatible with operating temperatures of up to 1100° C. without oxidation and with a minimum of circuit inductance.
Inventors
- 👤 Chi-sheng Liu
- 👤 Donald W. Feldman
- 👤 Roy K. Williams
- 👤 Lelland A. Weaver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:26
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/02; H01S3/03; H01S3/038
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
97 words
In a high temperature laser, a feed-through assembly comprising: an open-ended elongated tubular quartz envelope, a first and second molybdenum assembly sealed to either end of said quartz envelope to seal off the enclosed volume of said quartz envelope, said first molybdenum assembly including an electrical contact means for connection to an electrical excitation source, said second molybdenum assembly including an electrode adapter means and a tubular electrical conductor means positioned within said quartz envelope and connected between said electrical contact means of said first molybdenum assembly and said electrode adapter means of said second molybdenum assembly.
Claim 2
Dependent Claim
97 words
In a high temperature laser, a feed-through assembly comprising: an open-ended elongated tubular quartz envelope, a first and second molybdenum assembly sealed to either end of said quartz envelope to seal off the enclosed volume of said quartz envelope, said first molybdenum assembly including an electrical contact means for connection to an electrical excitation source, said second molybdenum assembly including an electrode adapter means and a tubular electrical conductor means positioned within said quartz envelope and connected between said electrical contact means of said first molybdenum assembly and said electrode adapter means of said second molybdenum assembly.
Claim 3
Dependent Claim
15 words
An assembly as claimed in claim 1 wherein said tubular electrical conductor means is molybdenum.
Claim 4
Dependent Claim
18 words
An assembly as claimed in claim 1 wherein the sealed-off enclosed volume of said quartz envelope is evacuated.
Claim 5
Dependent Claim
21 words
An assembly as claimed in claim 1 further including an inert gas within the sealed-off enclosed volume of said quartz envelope.
Claim 6
Dependent Claim
25 words
An assembly as claimed in claim 1 wherein quartz to molybdenum mechanical press seals seal the first and second molybdenum assemblies to said quartz envelope.
Claim 7
Dependent Claim
27 words
An assembly as claimed in claim 1 wherein tubular electrical conductor means consists of tubular molybdenum rod and a tubular bellows element to provide thermal expansion compensation.
Claim 8
Dependent Claim
68 words
An assembly as claimed in claim 1 wherein said first and second molybdenum assemblies are cup-like members, said electrical contact means being positioned at the center of the base of the first molybdenum cup-like member, said electrode adapter means being positioned at the center of the base of the second molybdenum cup-like member, said tubular electrical conductor means being a molybdenum rod concentrically positioned within said quartz envelope.
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) | 1983-12-30 | 1984-06-30 | 1984-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-30 | 1988-06-30 | 1988-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-30 | 1992-06-30 | 1992-12-30 | $7700.00 | Window Closed / Lapsed |