US3307157A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Xerox Corp
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Filing: 1964-01-02
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Granted: 1967-02-28
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Expires: 1984-01-02
Abstract
No abstract record available.
Inventors
- 👤 David C Harper
- 👤 Raymond T Wright
- 👤 James E Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:13
CPC Classifications
G; G11; G11C; G11C13/00; G11C13/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
APPARATUS FOR SCANNING A PHOTOSENSITIVE STORAGE ELEMENT IN A DATA PROCESSING SYSTEM COMPRISING: (A) A CATHODE RAY FLYING SPOT SCANNER; (B) MEANS TO POSITION A PHOTOSENSITIVE STORAGE ELEMENT, HAVING RECORDING TRACKS IN CONCENTRIC RINGS, IN FACE-TO-FACE RELATIONSHIP WITH SAID CATHODE RAY FLYING SPOT SCANNER; (C) A LENS SYSTEM ARRANGED TO FOCUS THE SPOT OF SAID SCANNER ON SAID ELEMENT; (D) TWO SINE WAVE SWEEP GENERATORS OF THE SAME FREQUENCY; (E) PHASING MEANS TO MAINTAIN A 90* PHASE DIFFERENTIAL BETWEEN SAID TWO SWEEP GENERATORS; (F) TWO SWEEP AMPLIFIERS WITH THEIR INPUTS CONNECTED TO SAID SWEEP GENERATORS AND THEIR OUTPUTS CONNECTED TO DEFLECTION ELEMENTS OF SAID SCANNER FOR OPERATING SAID SCANNER IN A CIRCULAR SWEEP MODE ILLUMINATING SAID ELEMENT ALONG THE CONCENTRIC RINGS OF SAID RECORDING TRACKS; AND, (G) COMMON AMPLITUDE CONTROL MEANS CONNECTED TO SAID TWO SWEEP AMPLIFIERS TO SIMULTANEOUSLY ADJUST THE DIAMETER OF THE SCAN CIRCLE TO COINCIDE WITH A SELECTED RECORDING TRACK.
Claim 2
Dependent Claim
153 words
APPARATUS FOR SCANNING A PHOTOSENSITIVE STORAGE ELEMENT IN A DATA PROCESSING SYSTEM COMPRISING: (A) A CATHODE RAY FLYING SPOT SCANNER; (B) MEANS TO POSITION A PHOTOSENSITIVE STORAGE ELEMENT, HAVING RECORDING TRACKS IN CONCENTRIC RINGS, IN FACE-TO-FACE RELATIONSHIP WITH SAID CATHODE RAY FLYING SPOT SCANNER; (C) A LENS SYSTEM ARRANGED TO FOCUS THE SPOT OF SAID SCANNER ON SAID ELEMENT; (D) TWO SINE WAVE SWEEP GENERATORS OF THE SAME FREQUENCY; (E) PHASING MEANS TO MAINTAIN A 90* PHASE DIFFERENTIAL BETWEEN SAID TWO SWEEP GENERATORS; (F) TWO SWEEP AMPLIFIERS WITH THEIR INPUTS CONNECTED TO SAID SWEEP GENERATORS AND THEIR OUTPUTS CONNECTED TO DEFLECTION ELEMENTS OF SAID SCANNER FOR OPERATING SAID SCANNER IN A CIRCULAR SWEEP MODE ILLUMINATING SAID ELEMENT ALONG THE CONCENTRIC RINGS OF SAID RECORDING TRACKS; AND, (G) COMMON AMPLITUDE CONTROL MEANS CONNECTED TO SAID TWO SWEEP AMPLIFIERS TO SIMULTANEOUSLY ADJUST THE DIAMETER OF THE SCAN CIRCLE TO COINCIDE WITH A SELECTED RECORDING TRACK.
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) | 1970-02-27 | 1970-08-29 | 1971-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-27 | 1974-08-29 | 1975-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-27 | 1978-08-29 | 1979-02-28 | $7700.00 | Window Closed / Lapsed |