US3158733A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Focus control for electron beam heating
Assignee: National Research Corp
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Filing: 1962-09-12
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Granted: 1964-11-24
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Expires: 1982-09-12
Abstract
No abstract record available.
Inventors
- 👤 Clifton B Sibley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:12
CPC Classifications
H; H01; H01J; H01J37/00; H01J37/02; H01J37/21
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
IN AN ELECTRON BEAM MACHINE FOR PERFORMING METAL MACHINING OPERATIONS SUCH AS WELDING, MELTING, ETCHING AND THE LIKE, WHEREIN A SELF-ACCELERATED GUN EMITS A BEAM OF ELECTRONS TO IMPINGE ON A SMALL AREA OF THE WORKPIECE WITH A HIGH WATT DENSITY WHEREBY LOW ENERGY ELECTRONS ARE THERMIONICALLY EMITTED, THE IMPROVEMENT COMPRISING: A PICKUP ELECTRODE LOCATED IN LINE-OF-SIGHT RELATION TO THE AREA OF THE WORKPIECE SUBJECT TO IMPINGEMENT BY THE BEAM, MEANS FOR BIASING THE ELECTRODE POSITIVE TO THE WORKPIECE SO THAT THE ELECTRODE ATTRACTS SAID THERMIONICALLY EMITTED ELECTRONS AND ELECTRIC CIRCUIT MEANS INCLUDING INDICATOR
Claim 2
Dependent Claim
94 words
IN AN ELECTRON BEAM MACHINE FOR PERFORMING METAL MACHINING OPERATIONS SUCH AS WELDING, MELTING, ETCHING AND THE LIKE, WHEREIN A SELF-ACCELERATED GUN EMITS A BEAM OF ELECTRONS TO IMPINGE ON A SMALL AREA OF THE WORKPIECE WITH A HIGH WATT DENSITY WHEREBY LOW ENERGY ELECTRONS ARE THERMIONICALLY EMITTED, THE IMPROVEMENT COMPRISING: A PICKUP ELECTRODE LOCATED IN LINE-OF-SIGHT RELATION TO THE AREA OF THE WORKPIECE SUBJECT TO IMPINGEMENT BY THE BEAM, MEANS FOR BIASING THE ELECTRODE POSITIVE TO THE WORKPIECE SO THAT THE ELECTRODE ATTRACTS SAID THERMIONICALLY EMITTED ELECTRONS AND ELECTRIC CIRCUIT MEANS INCLUDING INDICATOR
References Cited (Backward Citations)
DE1094891B
Cited
US3054896A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-11-24 | 1968-05-25 | 1968-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-24 | 1972-05-25 | 1972-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-24 | 1976-05-25 | 1976-11-24 | $7700.00 | Window Closed / Lapsed |