Patent FR1542352A successfully refreshed from Google Patents.
US3136876A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Indicator and control system
Assignee: Clevite Corp
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Filing: 1960-10-26
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Granted: 1964-06-09
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Expires: 1980-10-26
Abstract
No abstract record available.
Inventors
- 👤 Jevon L Crosthwait
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:13
CPC Classifications
C; C30; C30B; C30B13/00; C30B13/28; C30B13/30; Y; Y10; Y10T; Y10T117/00; Y10T117/10; Y10T117/1004; Y10T117/1008; Y10T117/1024; Y10T117/1032; Y10T117/1068; Y10T117/1076; Y10T117/1088
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
159 words
AN INDUCTION HEATING APPARATUS FOR A MOVABLE OBJECT HAVING A VARIABLE DIMENSION COMPRISING: A HIGH FREQUENCY ELECTRICAL INDUCTION HEATING COIL EFFECTIVE TO HEAT AN OBJECT IN ITS FLUX FIELD; A SENSING COIL COAXIALLY DISPOSED WITH RESPECT TO SAID HEATING COIL AND POSITIONED ADJACENT THE OBJECT WHEREBY A VOLTAGE IS INDUCED IN SAID SENSING COIL AS A RESULT OF INDUCTIVE COUPLING WITH THE OBJECT AND AS A RESULT OF INDUCTIVE COUPLING WITH SAID HEATING COIL; A REFERENCE COIL COAXIALLY DISPOSED WITH RESPECT TO SAID HEATING COIL TO BE INDUCTIVELY COUPLED ONLY THERETO WHEREBY A VOLTAGE IS INDUCED IN SAID REFERENCE COIL AS A RESULT OF INDUCTIVE COUPLING THEREOF WITH SAID HEATING COIL; AND CIRCUIT MEANS FOR COMPARING THE ELECTRICAL VOLTAGES INDUCED IN SAID SENSING COIL AND SAID REFERENCE COIL RESPECTIVELY TO PRODUCE AN ELECTRICAL DIFFERENCE SIGNAL INDICATIVE OF THE CHANGES IN INDUCTIVE COUPLING BETWEEN SAID SENSING COIL AND THE OBJECT AND THUS INDICATIVE OF VARIATIONS IN DIMENSION OF THE OBJECT.
Claim 2
Dependent Claim
159 words
AN INDUCTION HEATING APPARATUS FOR A MOVABLE OBJECT HAVING A VARIABLE DIMENSION COMPRISING: A HIGH FREQUENCY ELECTRICAL INDUCTION HEATING COIL EFFECTIVE TO HEAT AN OBJECT IN ITS FLUX FIELD; A SENSING COIL COAXIALLY DISPOSED WITH RESPECT TO SAID HEATING COIL AND POSITIONED ADJACENT THE OBJECT WHEREBY A VOLTAGE IS INDUCED IN SAID SENSING COIL AS A RESULT OF INDUCTIVE COUPLING WITH THE OBJECT AND AS A RESULT OF INDUCTIVE COUPLING WITH SAID HEATING COIL; A REFERENCE COIL COAXIALLY DISPOSED WITH RESPECT TO SAID HEATING COIL TO BE INDUCTIVELY COUPLED ONLY THERETO WHEREBY A VOLTAGE IS INDUCED IN SAID REFERENCE COIL AS A RESULT OF INDUCTIVE COUPLING THEREOF WITH SAID HEATING COIL; AND CIRCUIT MEANS FOR COMPARING THE ELECTRICAL VOLTAGES INDUCED IN SAID SENSING COIL AND SAID REFERENCE COIL RESPECTIVELY TO PRODUCE AN ELECTRICAL DIFFERENCE SIGNAL INDICATIVE OF THE CHANGES IN INDUCTIVE COUPLING BETWEEN SAID SENSING COIL AND THE OBJECT AND THUS INDICATIVE OF VARIATIONS IN DIMENSION OF THE OBJECT.
References Cited (Backward Citations)
US2632091A
Cited
US2691732A
Cited
DE962006C
Cited
US2913561A
Cited
US2916593A
Cited
US3046379A
Cited
US2992311A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-09 | 1967-12-09 | 1968-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-09 | 1971-12-09 | 1972-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-09 | 1975-12-09 | 1976-06-09 | $7700.00 | Window Closed / Lapsed |