US3243628A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron multiplier with curved resistive secondary emissive coating
Assignee: RCA Corp
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Filing: 1962-06-26
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Granted: 1966-03-29
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Expires: 1982-06-26
Abstract
No abstract record available.
Inventors
- 👤 Robert M Matheson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:07
CPC Classifications
H; H01; H01J; H01J43/00; H01J43/04; H01J43/06; H01J43/18; H01J43/24; H01J1/00; H01J1/02; H01J1/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
AN ELECTRON MULTIPLIER TUBE ADAPTED TO OPERATE WITHOUT A MAGNETIC FIELD COMPRISING: (A) AN EVACUATED ENVELOPE; (B) A SOURCE OF PRIMARY ELECTRONS WITHIN SAID ENVELOPE; (C) A COLLECTOR ELECTRODE WITHIN SAID ENVELOPE AND SPACED FROM SAID SOURCE OF PRIMARY ELECTRONS; (D) A CONTINUOUS MEMBER HAVING TWO SPACED RESISTIVE SECONDARY ELECTRONS EMISSIVE PORTIONS WITHIN SAID ENVELOPE AND EXTENDING FROM ADJACENT SAID SOURCE TO ADJACENT SAID COLLECTOR ELECTRODE; (E) SAID TWO RESISTIVE SECONDARY ELECTRON EMISSIVE PORTIONS BEING SIMILARLY CURVED SO THAT NO STRAIGHT LINE ELECTRON PATH EXISTS BETWEEN SAID SOURCE AND SAID COLLECTOR ELECTRODE; AND (F) MEANS FOR ACCELERATING ELECTRONS FROM ONE OF THE OTHER OF SAID RESISTIVE SECONDARY ELECTRON EMISSIVE PORTIONS IN SUBSTANTIALLY STRAIGHT PATHS HAVING A COMPONENT IN THE DIRECTION OF SAID COLLECTOR ELECTRODE.
Claim 2
Dependent Claim
124 words
AN ELECTRON MULTIPLIER TUBE ADAPTED TO OPERATE WITHOUT A MAGNETIC FIELD COMPRISING: (A) AN EVACUATED ENVELOPE; (B) A SOURCE OF PRIMARY ELECTRONS WITHIN SAID ENVELOPE; (C) A COLLECTOR ELECTRODE WITHIN SAID ENVELOPE AND SPACED FROM SAID SOURCE OF PRIMARY ELECTRONS; (D) A CONTINUOUS MEMBER HAVING TWO SPACED RESISTIVE SECONDARY ELECTRONS EMISSIVE PORTIONS WITHIN SAID ENVELOPE AND EXTENDING FROM ADJACENT SAID SOURCE TO ADJACENT SAID COLLECTOR ELECTRODE; (E) SAID TWO RESISTIVE SECONDARY ELECTRON EMISSIVE PORTIONS BEING SIMILARLY CURVED SO THAT NO STRAIGHT LINE ELECTRON PATH EXISTS BETWEEN SAID SOURCE AND SAID COLLECTOR ELECTRODE; AND (F) MEANS FOR ACCELERATING ELECTRONS FROM ONE OF THE OTHER OF SAID RESISTIVE SECONDARY ELECTRON EMISSIVE PORTIONS IN SUBSTANTIALLY STRAIGHT PATHS HAVING A COMPONENT IN THE DIRECTION OF SAID COLLECTOR ELECTRODE.
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) | 1969-03-28 | 1969-09-27 | 1970-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-28 | 1973-09-27 | 1974-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-28 | 1977-09-27 | 1978-03-29 | $7700.00 | Window Closed / Lapsed |