US3257544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating circuits
Assignee: WARREN ELECTRIC CORP
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Filing: 1963-05-09
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Granted: 1966-06-21
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Expires: 1983-05-09
Abstract
No abstract record available.
Inventors
- 👤 Jr Gordon L Benjamin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:28
CPC Classifications
H; H05; H05B; H05B1/00; H05B1/02; H05B1/0227; H05B1/023; H05B1/0244
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
216 words
A HEATING CIRCUIT INCLUDING A MAIN CIRCUIT, FIRST AND SECOND SWITCHES, BOTH SWITCHES HAVING FIRST AND SECOND OPERATIVE POSITIONS, AND THREE LEADS, TWO OF SAID LEADS BEING FIRST AND SECOND HEATER LEADS, EACH HEATER LEAD INCLUDING AT LEAST ONE HEATING ELEMENT, SAID SWITCHES PROVIDING THREE ALTERNATIVE OPERATING CIRCUITS, IN THE FIRST, THE FIRST SWITCHES IS IN ITS FIRST POSITION AND CONNECTS HEATER LEADS IN PARALLEL, THE SECOND HEATER LEAD INCLUDING THE SECOND SWITCH AND THE SECOND SWITCH BEING IN ITS FIRST POSITION AND PLACING THE SECOND LEAD IN THE MAIN CIRCUIT, THE THIRD LEAD BEING OPEN, IN THE SECOND ALTERNATIVE OPERATING CIRCUIT, SAID SECOND SWITCH BEING IN ITS SECOND POSITION AND CONNECTED TO SAID THIRD LEAD, SAID THIRD LEAD BEING STILL OPEN AND SAID FIRST SWITCH IS IN ITS FIRST POSITION, SAID FIRST HEATER LEAD NOW BEING OPEN, AND IN THE THIRD ALTERNATIVE OPERATING CIRCUIT, SAID FIRST SWITCH BEING IN ITS SECOND POSITION AND THEN PLACING THE THIRD LEAD IN THE MAIN CIRCUIT, THE SECOND SWITCH STILL BEING IN ITS SECOND POSITION, SAID FIRST AND SECOND HEATER LEADS NOW BEING IN SERIES, AND MEANS TO OPERATE SAID SWITCHES TO ESTABLISH SAID THREE OPERATING CIRCUITS IN THE NAMED TO REVERSE ORDER DEPENDING ON WHETHER THE TEMPERATURE OF THE MEDIUM EXPOSED TO SAID HEATERS IS RISING OR FALLING.
Claim 2
Dependent Claim
216 words
A HEATING CIRCUIT INCLUDING A MAIN CIRCUIT, FIRST AND SECOND SWITCHES, BOTH SWITCHES HAVING FIRST AND SECOND OPERATIVE POSITIONS, AND THREE LEADS, TWO OF SAID LEADS BEING FIRST AND SECOND HEATER LEADS, EACH HEATER LEAD INCLUDING AT LEAST ONE HEATING ELEMENT, SAID SWITCHES PROVIDING THREE ALTERNATIVE OPERATING CIRCUITS, IN THE FIRST, THE FIRST SWITCHES IS IN ITS FIRST POSITION AND CONNECTS HEATER LEADS IN PARALLEL, THE SECOND HEATER LEAD INCLUDING THE SECOND SWITCH AND THE SECOND SWITCH BEING IN ITS FIRST POSITION AND PLACING THE SECOND LEAD IN THE MAIN CIRCUIT, THE THIRD LEAD BEING OPEN, IN THE SECOND ALTERNATIVE OPERATING CIRCUIT, SAID SECOND SWITCH BEING IN ITS SECOND POSITION AND CONNECTED TO SAID THIRD LEAD, SAID THIRD LEAD BEING STILL OPEN AND SAID FIRST SWITCH IS IN ITS FIRST POSITION, SAID FIRST HEATER LEAD NOW BEING OPEN, AND IN THE THIRD ALTERNATIVE OPERATING CIRCUIT, SAID FIRST SWITCH BEING IN ITS SECOND POSITION AND THEN PLACING THE THIRD LEAD IN THE MAIN CIRCUIT, THE SECOND SWITCH STILL BEING IN ITS SECOND POSITION, SAID FIRST AND SECOND HEATER LEADS NOW BEING IN SERIES, AND MEANS TO OPERATE SAID SWITCHES TO ESTABLISH SAID THREE OPERATING CIRCUITS IN THE NAMED TO REVERSE ORDER DEPENDING ON WHETHER THE TEMPERATURE OF THE MEDIUM EXPOSED TO SAID HEATERS IS RISING OR FALLING.
References Cited (Backward Citations)
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US2085217A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-20 | 1969-12-20 | 1970-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-20 | 1973-12-20 | 1974-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-20 | 1977-12-20 | 1978-06-21 | $7700.00 | Window Closed / Lapsed |