US3329856A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image dissector tube field mesh
Assignee: TDK Micronas GmbH
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Filing: 1964-09-24
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Granted: 1967-07-04
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Expires: 1984-09-24
Abstract
No abstract record available.
Inventors
- 👤 Richard H Foote
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:16
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/08; H01J31/26; H01J31/42; H01J31/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
AN IMAGE DISSECTOR TUBE COMPRISING: A SOURCE OF AN EXTENDED AREA ELECTRON BEAM; FIRST ELECTRODE MEANS SPACED AXIALLY FROM SAID BEAM SOURCE AND HAVING A DEFINING APERTURE THEREIN; SECONDARY ELECTRON MULTIPLIER MEANS FOR RECEIVING AND MULTIPLYING THE ELECTRONS OF SAID BEAM WHICH PASS THROUGH SAID APERTURE; A SCREEN ELECTRODE BETWEEN SAID BEAM SOURCE AND FIRST ELECTRODE; MEANS ACTING UPON SAID BEAM BETWEEN SAID SCREEN ELECTRODE AND FIRST ELECTRODE FOR SCANNING SAID BEAM OVER SAID APERTURE; AND MEANS FOR PROVIDING A MAGNETIC FIELD EXTENDING AXIALLY THROUGH SAID TUBE FOR FOCUSING SAID BEAM ONTO THE PLANE OF SAID APERTURE; SAID SCREEN ELECTRODE BEING CURVED TOWARD SAID FIRST ELECTRODE SO THAT THE TRANSIT TIMES OF THE ELECTRONS OF SAID BEAM FROM ALL POINTS ON SAID B EAM SOURCE TO SAID APERTURE ARE SUBSTANTIALLY EQUAL TO THE TIMES REQUIRED FOR SAID ELECTRONS TO MAKE AN INTEGRAL NUMBER OF COMPLETE REVOLUTIONS IN SAID MAGNETIC FIELD.
Claim 2
Dependent Claim
150 words
AN IMAGE DISSECTOR TUBE COMPRISING: A SOURCE OF AN EXTENDED AREA ELECTRON BEAM; FIRST ELECTRODE MEANS SPACED AXIALLY FROM SAID BEAM SOURCE AND HAVING A DEFINING APERTURE THEREIN; SECONDARY ELECTRON MULTIPLIER MEANS FOR RECEIVING AND MULTIPLYING THE ELECTRONS OF SAID BEAM WHICH PASS THROUGH SAID APERTURE; A SCREEN ELECTRODE BETWEEN SAID BEAM SOURCE AND FIRST ELECTRODE; MEANS ACTING UPON SAID BEAM BETWEEN SAID SCREEN ELECTRODE AND FIRST ELECTRODE FOR SCANNING SAID BEAM OVER SAID APERTURE; AND MEANS FOR PROVIDING A MAGNETIC FIELD EXTENDING AXIALLY THROUGH SAID TUBE FOR FOCUSING SAID BEAM ONTO THE PLANE OF SAID APERTURE; SAID SCREEN ELECTRODE BEING CURVED TOWARD SAID FIRST ELECTRODE SO THAT THE TRANSIT TIMES OF THE ELECTRONS OF SAID BEAM FROM ALL POINTS ON SAID B EAM SOURCE TO SAID APERTURE ARE SUBSTANTIALLY EQUAL TO THE TIMES REQUIRED FOR SAID ELECTRONS TO MAKE AN INTEGRAL NUMBER OF COMPLETE REVOLUTIONS IN SAID MAGNETIC FIELD.
References Cited (Backward Citations)
US3207997A
Cited
US3286114A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-03 | 1971-01-02 | 1971-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-03 | 1975-01-02 | 1975-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-03 | 1979-01-02 | 1979-07-04 | $7700.00 | Window Closed / Lapsed |