US3327167A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical detecting system
Assignee: Franklin Electric Co Inc
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Filing: 1964-06-30
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Granted: 1967-06-20
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Expires: 1984-06-30
Abstract
No abstract record available.
Inventors
- 👤 Edward J Schaefer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:48
CPC Classifications
H; H02; H02H; H02H7/00; H02H7/08; H02H7/085; H02H7/0852
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
A DETECTING CIRCUIT RESPONSIVE TO THE TEMPERATURE OF ALTERNATING CURRENT APPARATUS WHEN ENERGIZED BY ALTERNATING CURRENT, THE APPARATUS BEING CONNECTED BY AT LEAST TWO CONDUCTORS TO AN ALTERNATING CURRENT POWER SUPPLY, SAID CIRCUIT COMPRISING MEANS FOR CAUSING DIRECT CURRENT TO BE SUPERIMPOSED UPON AT LEAST A PORTION OF THE POWER CIRCUIT OF SAID APPARATUS IN WHICH ALTERNATING CURRENT FLOWS AND AT LEAST A PORTION OF ONE OF SAID TWO CONDUCTORS IN WHICH ALTERNATING CURRENT IS FLOWING, THE FLOW OF DIRECT CURRENT DEPENDING UPON THE RESISTANCE AND THE TEMPERATURE OF THE APPARATUS, AND DIRECT CURRENT RESPONSIVE MEANS HAVING AT LEAST A PORTION SERIALLY CONNECTED IN SAID PORTION OF SAID ONE CONDUCTOR, WHEREBY SAID SUPERIMPOSED DIRECT CURRENT FLOWING THROUGH A PORTION OF SAID POWER CIRCUIT AND A PORTION OF SAID ONE CONDUCTOR ALSO FLOWS THROUGH SAID PORTION OF SAID DIRECT CURRENT RESPONSIVE MEANS AND IS DETECTED THEREBY.
Claim 2
Dependent Claim
145 words
A DETECTING CIRCUIT RESPONSIVE TO THE TEMPERATURE OF ALTERNATING CURRENT APPARATUS WHEN ENERGIZED BY ALTERNATING CURRENT, THE APPARATUS BEING CONNECTED BY AT LEAST TWO CONDUCTORS TO AN ALTERNATING CURRENT POWER SUPPLY, SAID CIRCUIT COMPRISING MEANS FOR CAUSING DIRECT CURRENT TO BE SUPERIMPOSED UPON AT LEAST A PORTION OF THE POWER CIRCUIT OF SAID APPARATUS IN WHICH ALTERNATING CURRENT FLOWS AND AT LEAST A PORTION OF ONE OF SAID TWO CONDUCTORS IN WHICH ALTERNATING CURRENT IS FLOWING, THE FLOW OF DIRECT CURRENT DEPENDING UPON THE RESISTANCE AND THE TEMPERATURE OF THE APPARATUS, AND DIRECT CURRENT RESPONSIVE MEANS HAVING AT LEAST A PORTION SERIALLY CONNECTED IN SAID PORTION OF SAID ONE CONDUCTOR, WHEREBY SAID SUPERIMPOSED DIRECT CURRENT FLOWING THROUGH A PORTION OF SAID POWER CIRCUIT AND A PORTION OF SAID ONE CONDUCTOR ALSO FLOWS THROUGH SAID PORTION OF SAID DIRECT CURRENT RESPONSIVE MEANS AND IS DETECTED THEREBY.
References Cited (Backward Citations)
US2504827A
Cited
US3155879A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-06-19 | 1970-12-19 | 1971-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-19 | 1974-12-19 | 1975-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-19 | 1978-12-19 | 1979-06-20 | $7700.00 | Window Closed / Lapsed |