US3135904A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoelectric line or edge tracer
Assignee: Airco Inc
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Filing: 1962-01-15
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Granted: 1964-06-02
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Expires: 1982-01-15
Abstract
No abstract record available.
Inventors
- 👤 Rawlins E Purkhiser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:25
CPC Classifications
G; G06; G06K; G06K11/00; G06K11/02; B; B23; B23Q; B23Q35/00; B23Q35/04; B23Q35/08; B23Q35/12; B23Q35/127; B23Q35/128
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
184 words
IN A LINE TRACER, THE COMBINATION OF A CARRIAGE PROPELLABLE OVER A SURFACE BEARING A LINE TO BE TRACED BUT RESTRAINED AGAINST ROTATION PARALLEL TO THAT SURFACE; AN OPTICO-ELECTRIC SYSTEM, CARRIED BY THE CARRIAGE, COMPRISING MEANS FOR PROJECTING AN IMAGE OF A LONGITUDINAL SEGMENT OF THE LINE AND A PAIR OF MUTUALLY FIXED PHOTOELECTRIC DEVICES HAVING RESPECTIVE ELONGATED LIGHT-SENSITIVE AREAS ALIGNED WITH EACH OTHER TRANSVERSELY TO, AND EACH PARTIALLY OVERLAIN BY A RESPECTIVE MARGIN OF, THE IMAGE, AT LEAST SAID PAIR OF PHOTOELECTRIC DEVICES BEING ANGULARLY MOVEABLE WITHIN THE CARRIAGE ABOUT AN AXIS NORMAL TO SAID SURFACE; BALANCEABLE ELECTRIC-CIRCUIT MEANS, INCLUDING AN ELECTRIC CURRENT SOURCE CONNECTED TO AND FROM WHICH RESPECTIVE CURRENTS ARE PASSED THROUGH SAID PHOTOELECTRIC DEVICES FOR MODULATION BY THE LIGHT INCIDENT ON THEIR RESPECTIVE SAID AREAS, FOR PRODUCING AN ELECTRIC OUTPUT OF DIRECTIVITY AND MAGNITUDE RESPECTIVELY CORRESPONDING TO THE DIRECTION AND DEGREE OF DISPLACEMENT OF THE IMAGE FROM A PREDETERMINED LATERAL RELATIONSHIP TO SAID AREAS; AND SERVO-MOTOR MEANS RESPONSIVE TO SAID OUTPUT FOR STEERING THE CARRIAGE AND CONCOMITANTLY CONTROLLING THE ANGULAR POSITION OF SAID PAIR OF PHOTOELECTRIC DEVICES ABOUT SAID AXIS.
Claim 2
Dependent Claim
184 words
IN A LINE TRACER, THE COMBINATION OF A CARRIAGE PROPELLABLE OVER A SURFACE BEARING A LINE TO BE TRACED BUT RESTRAINED AGAINST ROTATION PARALLEL TO THAT SURFACE; AN OPTICO-ELECTRIC SYSTEM, CARRIED BY THE CARRIAGE, COMPRISING MEANS FOR PROJECTING AN IMAGE OF A LONGITUDINAL SEGMENT OF THE LINE AND A PAIR OF MUTUALLY FIXED PHOTOELECTRIC DEVICES HAVING RESPECTIVE ELONGATED LIGHT-SENSITIVE AREAS ALIGNED WITH EACH OTHER TRANSVERSELY TO, AND EACH PARTIALLY OVERLAIN BY A RESPECTIVE MARGIN OF, THE IMAGE, AT LEAST SAID PAIR OF PHOTOELECTRIC DEVICES BEING ANGULARLY MOVEABLE WITHIN THE CARRIAGE ABOUT AN AXIS NORMAL TO SAID SURFACE; BALANCEABLE ELECTRIC-CIRCUIT MEANS, INCLUDING AN ELECTRIC CURRENT SOURCE CONNECTED TO AND FROM WHICH RESPECTIVE CURRENTS ARE PASSED THROUGH SAID PHOTOELECTRIC DEVICES FOR MODULATION BY THE LIGHT INCIDENT ON THEIR RESPECTIVE SAID AREAS, FOR PRODUCING AN ELECTRIC OUTPUT OF DIRECTIVITY AND MAGNITUDE RESPECTIVELY CORRESPONDING TO THE DIRECTION AND DEGREE OF DISPLACEMENT OF THE IMAGE FROM A PREDETERMINED LATERAL RELATIONSHIP TO SAID AREAS; AND SERVO-MOTOR MEANS RESPONSIVE TO SAID OUTPUT FOR STEERING THE CARRIAGE AND CONCOMITANTLY CONTROLLING THE ANGULAR POSITION OF SAID PAIR OF PHOTOELECTRIC DEVICES ABOUT SAID AXIS.
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) | 1967-06-02 | 1967-12-02 | 1968-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-02 | 1971-12-02 | 1972-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-02 | 1975-12-02 | 1976-06-02 | $7700.00 | Window Closed / Lapsed |