US3353002A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric water heater circuit
Assignee: General Electric Co
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Filing: 1965-04-28
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Granted: 1967-11-14
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Expires: 1985-04-28
Abstract
No abstract record available.
Inventors
- 👤 Edward L Macoicz
- 👤 Allyn H Fitzpatrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:20
CPC Classifications
H; H05; H05B; H05B1/00; H05B1/02; H05B1/0202; H05B1/0213; F; F24; F24H; F24H1/00; F24H1/18; F24H1/20; F24H1/201; F24H1/202; F24H15/00; F24H15/20; F24H15/212; F24H15/223; F24H15/225; F24H15/30; F24H15/355; F24H15/37; F24H9/00; F24H9/20; F24H9/2007; F24H9/2014; F24H9/2021
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
252 words
IN AN ELECTRIC WATER HEATER, AN ARRANGEMENT FOR ENERGIZING THREE ELECTRICAL HEATING ELEMENTS FROM A THREEWIRE SINGLE-PHASE SYSTEM WHICH INCLUDES A NEUTRAL LINE AND FIRST AND SECOND OUTER LINES, COMPRISING: (A) A WATER TANK HAVING A LOWER WATER INLET PORTION, AN UPPER WATER OUTLET PORTION AND A MIDDLE PORTION, (B) A FIRST ELECTRICAL HEATING ELEMENT DISPOSED WITHIN SAID WATER TANK IN SAID LOWER PORTION, SAID FIRST ELECTRICAL HEATING ELEMENT HAVING FIRST AND SECOND TERMINALS, (C) A SECOND ELECTRICAL HEATING ELEMENT DISPOSED WITHIN SAID WATER TANK IN SAID MIDDLE PORTION, SAID SECOND ELECTRICAL HEATING ELEMENT HAVING FIRST AND SECOND TERMINALS, (D) A THIRD ELECTRICAL HEATING ELEMENT DISPOSED WITHIN SAID WATER TANK IN SAID UPPER PORTION, SAID THIRD ELECTRICAL HEATING ELEMENT HAVING FIRST AND SECOND TERMINALS, (E) MEANS CONNECTING SAID FIRST TERMINALS OF SAID SECOND AND THIRD ELECTRICAL HEATING ELEMENTS TO THE FIRST OUTER LINE, (F) A FIRST THERMALLY RESPONSIVE SWITCH CONNECTED TO SAID FIRST TERMINAL OF SAID ELECTRICAL HEATING ELEMENT IN SERIES WITH SAID FIRST ELECTRICAL HEATING ELEMENT AND THE FIRST OUTER LINE, SAID FIRST THERMALLY RESPONSIVE SWITCH BEING NORMALLY CLOSED, AND OPENING WHEN WATER IN SAID LOWER PORTION OF SAID TANK REACHES A FIRST PREDETERMINED TEMPERATURE, (G) A SECOND THERMALLY RESPONSIVE SWITCH CONNECTED TO SAID SECOND TERMINAL OF SAID SECOND ELECTRICAL HEATING ELEMENT IN SERIES WITH SAID SECOND ELECTRICAL HEATING ELEMENT, SAID SECOND THERMALLY RESPONSIVE SWITCH BEING NORMALLY CLOSED, AND OPENING WHEN WATER IN SAID MIDDLE PORTION OF SAID TANK REACHES A PREDETERMINED TEMPERATURE APPROXIMATELY THE SAME AS SAID FIRST PREDETERMINED TEMPERATURE,
Claim 2
Dependent Claim
252 words
IN AN ELECTRIC WATER HEATER, AN ARRANGEMENT FOR ENERGIZING THREE ELECTRICAL HEATING ELEMENTS FROM A THREEWIRE SINGLE-PHASE SYSTEM WHICH INCLUDES A NEUTRAL LINE AND FIRST AND SECOND OUTER LINES, COMPRISING: (A) A WATER TANK HAVING A LOWER WATER INLET PORTION, AN UPPER WATER OUTLET PORTION AND A MIDDLE PORTION, (B) A FIRST ELECTRICAL HEATING ELEMENT DISPOSED WITHIN SAID WATER TANK IN SAID LOWER PORTION, SAID FIRST ELECTRICAL HEATING ELEMENT HAVING FIRST AND SECOND TERMINALS, (C) A SECOND ELECTRICAL HEATING ELEMENT DISPOSED WITHIN SAID WATER TANK IN SAID MIDDLE PORTION, SAID SECOND ELECTRICAL HEATING ELEMENT HAVING FIRST AND SECOND TERMINALS, (D) A THIRD ELECTRICAL HEATING ELEMENT DISPOSED WITHIN SAID WATER TANK IN SAID UPPER PORTION, SAID THIRD ELECTRICAL HEATING ELEMENT HAVING FIRST AND SECOND TERMINALS, (E) MEANS CONNECTING SAID FIRST TERMINALS OF SAID SECOND AND THIRD ELECTRICAL HEATING ELEMENTS TO THE FIRST OUTER LINE, (F) A FIRST THERMALLY RESPONSIVE SWITCH CONNECTED TO SAID FIRST TERMINAL OF SAID ELECTRICAL HEATING ELEMENT IN SERIES WITH SAID FIRST ELECTRICAL HEATING ELEMENT AND THE FIRST OUTER LINE, SAID FIRST THERMALLY RESPONSIVE SWITCH BEING NORMALLY CLOSED, AND OPENING WHEN WATER IN SAID LOWER PORTION OF SAID TANK REACHES A FIRST PREDETERMINED TEMPERATURE, (G) A SECOND THERMALLY RESPONSIVE SWITCH CONNECTED TO SAID SECOND TERMINAL OF SAID SECOND ELECTRICAL HEATING ELEMENT IN SERIES WITH SAID SECOND ELECTRICAL HEATING ELEMENT, SAID SECOND THERMALLY RESPONSIVE SWITCH BEING NORMALLY CLOSED, AND OPENING WHEN WATER IN SAID MIDDLE PORTION OF SAID TANK REACHES A PREDETERMINED TEMPERATURE APPROXIMATELY THE SAME AS SAID FIRST PREDETERMINED TEMPERATURE,
References Cited (Backward Citations)
US2380545A
Cited
US3162752A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-11-13 | 1971-05-15 | 1971-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-13 | 1975-05-15 | 1975-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-13 | 1979-05-15 | 1979-11-14 | $7700.00 | Window Closed / Lapsed |