US3121816A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ion source for positive ion accelerators
Assignee: High Voltage Engineering Corp
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Filing: 1960-09-22
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Granted: 1964-02-18
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Expires: 1980-09-22
Abstract
No abstract record available.
Inventors
- 👤 Norman B Brooks
- 👤 Bertram S Quintal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:29
CPC Classifications
H; H01; H01J; H01J27/00; H01J27/02; H01J27/08; H01J27/10; H01J27/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
AN ION SOURCE COMPRISING IN COMBINATION A CATHODE ADAPTED TO EMIT ELECTRONS UPON ELECTRON BOMBARDMENT THEREOF, AN APERTURED MAGNETIC POLE-FACE LENS, AND AN APERTURED EXTRACTION ELECTRODE IN AXIAL ALIGNMENT, SAID CATHODE AND THE APERTURES OF SAID LENS AND SAID EXTRACTION ELECTRODE DEFINING AN AXIS, SAID LENS COMPRISING AN APERTURED ANODE AND AN APERTURED GRID, MEANS FOR IMPRESSING A POTENTIAL NOT GREATER THAN OF THE ORDER OF 10**2 VOLTS NEGATIVE UPON SAID CATHODE WITH RESPECT TO SAID ANODE, MEANS FOR IMPRESSING A POTENTIAL NOT LESS THAN 10**4 VOLTS NEGATIVE UPON SAID EXTRACTION ELECTRODE WITH RESPECT TO SAID ANODE, A FILAMENTARY THERMIONIC ELECTRON EMITTER SUPPORTED AWAY FROM SAID AXIS BUT SUFFICIENTLY NEAR IT SO THAT ELECTRONS EMITTED THEREBY COME WITHIN THE INFLUENCE OF THE POTENTIAL DIFFERENCE BETWEEN SAID CATHODE AND SAID ANODE.
Claim 2
Dependent Claim
130 words
AN ION SOURCE COMPRISING IN COMBINATION A CATHODE ADAPTED TO EMIT ELECTRONS UPON ELECTRON BOMBARDMENT THEREOF, AN APERTURED MAGNETIC POLE-FACE LENS, AND AN APERTURED EXTRACTION ELECTRODE IN AXIAL ALIGNMENT, SAID CATHODE AND THE APERTURES OF SAID LENS AND SAID EXTRACTION ELECTRODE DEFINING AN AXIS, SAID LENS COMPRISING AN APERTURED ANODE AND AN APERTURED GRID, MEANS FOR IMPRESSING A POTENTIAL NOT GREATER THAN OF THE ORDER OF 10**2 VOLTS NEGATIVE UPON SAID CATHODE WITH RESPECT TO SAID ANODE, MEANS FOR IMPRESSING A POTENTIAL NOT LESS THAN 10**4 VOLTS NEGATIVE UPON SAID EXTRACTION ELECTRODE WITH RESPECT TO SAID ANODE, A FILAMENTARY THERMIONIC ELECTRON EMITTER SUPPORTED AWAY FROM SAID AXIS BUT SUFFICIENTLY NEAR IT SO THAT ELECTRONS EMITTED THEREBY COME WITHIN THE INFLUENCE OF THE POTENTIAL DIFFERENCE BETWEEN SAID CATHODE AND SAID ANODE.
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) | 1967-02-17 | 1967-08-19 | 1968-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-02-17 | 1971-08-19 | 1972-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-02-17 | 1975-08-19 | 1976-02-18 | $7700.00 | Window Closed / Lapsed |