US3089918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telewriting apparatus
Assignee: AT&T Inc
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Filing: 1960-09-09
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Granted: 1963-05-14
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Expires: 1980-09-09
Abstract
No abstract record available.
Inventors
- 👤 Robert E Graham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:27
CPC Classifications
G; G06; G06F; G06F3/00; G06F3/01; G06F3/03; G06F3/041; G06F3/045; G06F3/033
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
167 words
TELEWRITING APPARATUS COMPRISING A CATHODE RAY TUBE MEANS FOR PRODUCING A BEAM OF ELECTRONS WITHIN SAID TUBE, MEANS FOR DEFLECTING SAID BEAM IN RESPONSE TO INPUT SIGNALS, MEANS FOR SUPPLYING AN OSCILLATORY SIGNAL TO SAID BEAM DEFLECTION MEANS FOR ROTATING SAID BEAM ABOUT A REFERENCE AXIS, A PHOTOCELL, MEANS FOR DETECTING AN OUTPUT FROM SAID PHOTOCELL AS IT IS MOVED IN CLOSED PROXIMITY TO THE FACE OF SAID CATHODE RAY TUBE, MEANS SUPPLIED WITH THE OUTPUT OF SAID PHOTOCELL AND SAID OSCILLATORY SIGNAL FOR PRODUCING A POTENTIAL CORRESPONDING TO THE DIFFERENCE IN PHASE THEREBETWEEN AND OF A MAGNITUDE DEPENDENT ON THE DISTANCE BETWEEN SAID PHOTOCELL AND THE POINT OF IMPINGEMENT OF SAID BEAM ON THE FACE OF SAID TUBE, MEANS FOR INTEGRATING SAID POTENTIAL, MEANS FOR APPLYING SAID INTEGRATED POTENTIAL TO SAID BEAM DEFLECTION MEANS FOR DEFLECTING SAID BEAM SO THAT SAID REFERENCE AXIS PASSES THROUGH SAID PHOTOCELL, MEANS FOR APPLYING A SIGNAL TO SAID BEAM DEFLECTION MEANS TO DEFLECT SAID ELECTRON BEAM IN A SEARCH RASTER
Claim 2
Dependent Claim
167 words
TELEWRITING APPARATUS COMPRISING A CATHODE RAY TUBE MEANS FOR PRODUCING A BEAM OF ELECTRONS WITHIN SAID TUBE, MEANS FOR DEFLECTING SAID BEAM IN RESPONSE TO INPUT SIGNALS, MEANS FOR SUPPLYING AN OSCILLATORY SIGNAL TO SAID BEAM DEFLECTION MEANS FOR ROTATING SAID BEAM ABOUT A REFERENCE AXIS, A PHOTOCELL, MEANS FOR DETECTING AN OUTPUT FROM SAID PHOTOCELL AS IT IS MOVED IN CLOSED PROXIMITY TO THE FACE OF SAID CATHODE RAY TUBE, MEANS SUPPLIED WITH THE OUTPUT OF SAID PHOTOCELL AND SAID OSCILLATORY SIGNAL FOR PRODUCING A POTENTIAL CORRESPONDING TO THE DIFFERENCE IN PHASE THEREBETWEEN AND OF A MAGNITUDE DEPENDENT ON THE DISTANCE BETWEEN SAID PHOTOCELL AND THE POINT OF IMPINGEMENT OF SAID BEAM ON THE FACE OF SAID TUBE, MEANS FOR INTEGRATING SAID POTENTIAL, MEANS FOR APPLYING SAID INTEGRATED POTENTIAL TO SAID BEAM DEFLECTION MEANS FOR DEFLECTING SAID BEAM SO THAT SAID REFERENCE AXIS PASSES THROUGH SAID PHOTOCELL, MEANS FOR APPLYING A SIGNAL TO SAID BEAM DEFLECTION MEANS TO DEFLECT SAID ELECTRON BEAM IN A SEARCH RASTER
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) | 1966-05-13 | 1966-11-12 | 1967-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-13 | 1970-11-12 | 1971-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-13 | 1974-11-12 | 1975-05-14 | $7700.00 | Window Closed / Lapsed |