Patent US3408474A successfully refreshed from Google Patents.
US3408474A
Expired / Lapsed
US
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Electron beam welding apparatus
Assignee: General Electric Co
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Filing: 1966-04-04
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Granted: 1968-10-29
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Expires: 1986-04-04
Abstract
No abstract record available.
Inventors
- 👤 Robert D Downing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:26
CPC Classifications
H; H01; H01J; H01J37/00; H01J37/02; H01J37/21
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
AN ELECTRON BEAM WELDING APPARATUS COMPRISING, IN COMBINATION, AN ELECTRON BEAM SOURCE; MEANS FOR FOCUSING SAID ELECTRON BEAM; AND MEANS FOR DETERMINING THE FOCAL POINT OF SAID ELECTRON BEAM COMPRISING AN ELECTRODE HAVING A SURFACE INCLINED IN A SELECTED DIRECTION, MEANS FOR MOVING SAID ELECTRODE IN A HORIZONTAL PLANE AND MEANS FOR SWEEPING SAID BEAM TRANSVERSELY TO THE DIRECTION OF SAID INCLINE TO DETERMINE THE FOCAL POINT OF SAID BEAM BY MEASURING THE POINT OF MAXIMUM CURRENT TO SAID ELECTRODE.
Claim 2
Dependent Claim
80 words
AN ELECTRON BEAM WELDING APPARATUS COMPRISING, IN COMBINATION, AN ELECTRON BEAM SOURCE; MEANS FOR FOCUSING SAID ELECTRON BEAM; AND MEANS FOR DETERMINING THE FOCAL POINT OF SAID ELECTRON BEAM COMPRISING AN ELECTRODE HAVING A SURFACE INCLINED IN A SELECTED DIRECTION, MEANS FOR MOVING SAID ELECTRODE IN A HORIZONTAL PLANE AND MEANS FOR SWEEPING SAID BEAM TRANSVERSELY TO THE DIRECTION OF SAID INCLINE TO DETERMINE THE FOCAL POINT OF SAID BEAM BY MEASURING THE POINT OF MAXIMUM CURRENT TO SAID ELECTRODE.
References Cited (Backward Citations)
US2844706A
Cited
US3291959A
Cited
US3148265A
Cited
US3152238A
Cited
US3340377A
Cited
US3165619A
Cited
US3196246A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-29 | 1972-04-29 | 1972-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-29 | 1976-04-29 | 1976-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-29 | 1980-04-29 | 1980-10-29 | $7700.00 | Window Closed / Lapsed |