US3333254A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron beam readout system with beam control circuit
Assignee: Ampex Corp
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Filing: 1962-10-19
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Granted: 1967-07-25
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Expires: 1982-10-19
Abstract
No abstract record available.
Inventors
- 👤 Kurt F Wallace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:30
CPC Classifications
G; G11; G11C; G11C13/00; G11C13/04; G11C13/048; B; B65; B65D; B65D90/00; B65D90/22; H; H04; H04N; H04N5/00; H04N5/76; H04N5/80; H04N5/82
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
171 words
A SYSTEM FOR READING OUT INFORMATION FROM A RECORDED THERMOPASTIC FILM COMPRISING: MEANS FOR DIRECTING AN ELECTRON READOUT BEAM REPEATEDLY ALONG A PATH FOR SCANNING THE RECORDED GROOVES OF SUCH FILM AND FOR GENERATING SECONDARY ELECTRONS IN AN AMOUNT REPRESENTATIVE OF THE INFORMATION SIGNAL ON THE RECORDED GROOVE BEING SCANNED; A PAIR OF COLLECTORS, EACH COLLECTOR BEING EQUALLY SPACED FROM AND ON OPPOSITE SIDES OF THE PATH DEFINED BY THE BEAM FOR COLLECTING THE SECONDARY ELECTRONS GENERATED AND FOR DEVELOPING ELECTRICAL SIGNALS RELATED TO THE COLLECTED ELECTRONS; A SUMMING AMPLIFIER CONNECTED TO THE PAIR OF ELECTRODES FOR ADDING THE SIGNALS FROM EACH COLLECTOR TO PROVIDE AN OUTPUT SIGNAL REPRESENTATIVE OF THE RECORDED INFORMATION; A DIFFERENCE AMPLIFIER CONNECTED TO THE PAIR OF ELECTRODES IN ELECTRICAL PARALLEL WITH THE SUMMING AMPLIFIER FOR DERIVING A DIFFERENCE SIGNAL REPRESENTING THE DIFFERENCE BETWEEN THE SIGNALS DEVELOPED BY THE SAME COLLECTORS; AND MEANS FOR EMPLOYING SUCH DIFFERENCE SIGNAL TO DEFLECT THE ELECTRON BEAM SO THAT THE BEAM SUBSTANTIALLY FOLLOWS THE CENTER OF THE RECORDED GROOVE BEING SCANNED.
Claim 2
Independent Claim
171 words
A SYSTEM FOR READING OUT INFORMATION FROM A RECORDED THERMOPASTIC FILM COMPRISING: MEANS FOR DIRECTING AN ELECTRON READOUT BEAM REPEATEDLY ALONG A PATH FOR SCANNING THE RECORDED GROOVES OF SUCH FILM AND FOR GENERATING SECONDARY ELECTRONS IN AN AMOUNT REPRESENTATIVE OF THE INFORMATION SIGNAL ON THE RECORDED GROOVE BEING SCANNED; A PAIR OF COLLECTORS, EACH COLLECTOR BEING EQUALLY SPACED FROM AND ON OPPOSITE SIDES OF THE PATH DEFINED BY THE BEAM FOR COLLECTING THE SECONDARY ELECTRONS GENERATED AND FOR DEVELOPING ELECTRICAL SIGNALS RELATED TO THE COLLECTED ELECTRONS; A SUMMING AMPLIFIER CONNECTED TO THE PAIR OF ELECTRODES FOR ADDING THE SIGNALS FROM EACH COLLECTOR TO PROVIDE AN OUTPUT SIGNAL REPRESENTATIVE OF THE RECORDED INFORMATION; A DIFFERENCE AMPLIFIER CONNECTED TO THE PAIR OF ELECTRODES IN ELECTRICAL PARALLEL WITH THE SUMMING AMPLIFIER FOR DERIVING A DIFFERENCE SIGNAL REPRESENTING THE DIFFERENCE BETWEEN THE SIGNALS DEVELOPED BY THE SAME COLLECTORS; AND MEANS FOR EMPLOYING SUCH DIFFERENCE SIGNAL TO DEFLECT THE ELECTRON BEAM SO THAT THE BEAM SUBSTANTIALLY FOLLOWS THE CENTER OF THE RECORDED GROOVE BEING SCANNED.
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) | 1970-07-24 | 1971-01-23 | 1971-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-24 | 1975-01-23 | 1975-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-24 | 1979-01-23 | 1979-07-25 | $7700.00 | Window Closed / Lapsed |