US3366843A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermally responsive electrical control circuit
Assignee: Robertshaw Controls Co
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Filing: 1965-10-23
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Granted: 1968-01-30
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Expires: 1985-10-23
Abstract
No abstract record available.
Inventors
- 👤 Egils H Evalds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:13
CPC Classifications
H; H02; H02H; H02H5/00; H02H5/04; H02H5/042
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
IN A CONDITION RESPONSIVE CONTROL CIRCUIT THE COMBINATION COMPRISING: AN A.C. BRIDGE CIRCUIT HAVING FIRST AND SECOND OUTPUT TERMINALS AT WHICH AN OUTPUT SIGNAL IS PRESENTED WHICH VARIES IN PHASE AND MAGNITUDE DEPENDENT ON THE DIRECTION AND MAGNITUDE OF UNBALANCE OF THE BRIDGE, SAID BRIDGE CIRCUIT INCLUDING A CONDITION RESPONSIVE IMPEDANCE WHICH VARIES IN MAGNITUDE IN RESPONSE TO CHANGES IN THE CONDITION TO WHICH SAID IMPEDANCE IS RESPONSIVE CAUSING THE DIRECTION AND MAGNITUDE OF UNBALANCE OF THE BRIDGE TO CHANGE; A PHASE SENSIVE SWITCH MEANS HAVING A CONTROL TERMINAL, SAID SWITCH MEANS HAVING A FIRST AND SECOND MODE OF OPERATION DETERMINED BY THE PHASE AND MAGNITUDE OF A SIGNAL PRESENTED AT SAID CONTROL TERMINAL; AND MEANS INCLUDING A UNIDIRECTIONAL CURRENT CARRYING DEVICE CONNECTING SAID OUTPUT SIGNAL OF SAID A.C. BRIDGE CIRCUIT TO SAID CONTROL TERMINAL.
Claim 2
Dependent Claim
135 words
IN A CONDITION RESPONSIVE CONTROL CIRCUIT THE COMBINATION COMPRISING: AN A.C. BRIDGE CIRCUIT HAVING FIRST AND SECOND OUTPUT TERMINALS AT WHICH AN OUTPUT SIGNAL IS PRESENTED WHICH VARIES IN PHASE AND MAGNITUDE DEPENDENT ON THE DIRECTION AND MAGNITUDE OF UNBALANCE OF THE BRIDGE, SAID BRIDGE CIRCUIT INCLUDING A CONDITION RESPONSIVE IMPEDANCE WHICH VARIES IN MAGNITUDE IN RESPONSE TO CHANGES IN THE CONDITION TO WHICH SAID IMPEDANCE IS RESPONSIVE CAUSING THE DIRECTION AND MAGNITUDE OF UNBALANCE OF THE BRIDGE TO CHANGE; A PHASE SENSIVE SWITCH MEANS HAVING A CONTROL TERMINAL, SAID SWITCH MEANS HAVING A FIRST AND SECOND MODE OF OPERATION DETERMINED BY THE PHASE AND MAGNITUDE OF A SIGNAL PRESENTED AT SAID CONTROL TERMINAL; AND MEANS INCLUDING A UNIDIRECTIONAL CURRENT CARRYING DEVICE CONNECTING SAID OUTPUT SIGNAL OF SAID A.C. BRIDGE CIRCUIT TO SAID CONTROL TERMINAL.
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) | 1971-01-29 | 1971-07-31 | 1972-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-29 | 1975-07-31 | 1976-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-29 | 1979-07-31 | 1980-01-30 | $7700.00 | Window Closed / Lapsed |