US3352999A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric water heater circuit
Assignee: General Electric Co
•
Filing: 1965-04-28
•
Granted: 1967-11-14
•
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
2026-10-28 10:53
CPC Classifications
H; H05; H05B; H05B1/00; H05B1/02; H05B1/0202; H05B1/0213
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
332 words
IN AN ELECTRIC WATER HEATER, AN ARRANGEMENT FOR ENERGIZING A PAIR OF ELECTRICAL HEATING ELEMENTS FROM A THREE-WIRE, 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 BELOW SAID UPPER PORTION, SAID SECOND ELECTRICAL HEATING ELEMENT HAVING FIRST AND SECOND TERMINALS, (D) MEANS CONNECTING SAID FIRST TERMINALS OF SAID FIRST AND SECOND ELECTRICAL HEATING ELEMENTS TO THE FIRST OUTER LINE, (E) A FIRST THERMALLY RESPONSIVE SWITCH CONNECTING SAID SECOND TERMINAL OF SAID FIRST ELECTRICAL HEATING ELEMENT TO THE SECOND 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, (F) A SECOND THERMALLY RESPONSIVE SWITCH CONNECTED TO SAID SECOND TERMINAL OF 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, (G) A THIRD THERMALLY RESPONSIVE SWITCH CONNECTED IN SERIES WITH SAID SECOND ELECTRICAL HEATING ELEMENT AND SAID SECOND THERMALLY RESPONSIVE SWITCH, SAID THIRD THERMALLY RESPONSIVE SWITCH BEING OF A DOUBLETHROW TYPE NORMALLY CONNECTING, THROUGH SAID SECOND THERMALLY RESPONSIVE SWITCH, SAID SECOND TERMINAL OF SAID SECOND ELECTRICAL HEATING ELEMENT TO THE SECOND OUTER LINE; AND CONNECTING SAID SECOND TERMINAL OF SAID SECOND ELECTRICAL HEATING ELEMENT TO THE NEUTRAL LINE THROUGH SAID SECOND THERMALLY RESPONSIVE SWITCH WHEN WATER IN SAID UPPER PORTION OF SAID TANK REACHES A PREDETERMINED TEMPERATURE APPROXIMATELY THE SAME AS SAID FIRST PREDETERMINED TEMPERATURE, WHEREBY SAID SECOND ELECTRICAL HEATING ELEMENT IS PROVIDED WITH TWO LEVELS OF ENERGIZATION FOR AUTOMATIC FLEXIBILITY OF RECOVERY OF WATER TEMPERATURE WITHIN SAID TANK.
Claim 2
Dependent Claim
332 words
IN AN ELECTRIC WATER HEATER, AN ARRANGEMENT FOR ENERGIZING A PAIR OF ELECTRICAL HEATING ELEMENTS FROM A THREE-WIRE, 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 BELOW SAID UPPER PORTION, SAID SECOND ELECTRICAL HEATING ELEMENT HAVING FIRST AND SECOND TERMINALS, (D) MEANS CONNECTING SAID FIRST TERMINALS OF SAID FIRST AND SECOND ELECTRICAL HEATING ELEMENTS TO THE FIRST OUTER LINE, (E) A FIRST THERMALLY RESPONSIVE SWITCH CONNECTING SAID SECOND TERMINAL OF SAID FIRST ELECTRICAL HEATING ELEMENT TO THE SECOND 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, (F) A SECOND THERMALLY RESPONSIVE SWITCH CONNECTED TO SAID SECOND TERMINAL OF 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, (G) A THIRD THERMALLY RESPONSIVE SWITCH CONNECTED IN SERIES WITH SAID SECOND ELECTRICAL HEATING ELEMENT AND SAID SECOND THERMALLY RESPONSIVE SWITCH, SAID THIRD THERMALLY RESPONSIVE SWITCH BEING OF A DOUBLETHROW TYPE NORMALLY CONNECTING, THROUGH SAID SECOND THERMALLY RESPONSIVE SWITCH, SAID SECOND TERMINAL OF SAID SECOND ELECTRICAL HEATING ELEMENT TO THE SECOND OUTER LINE; AND CONNECTING SAID SECOND TERMINAL OF SAID SECOND ELECTRICAL HEATING ELEMENT TO THE NEUTRAL LINE THROUGH SAID SECOND THERMALLY RESPONSIVE SWITCH WHEN WATER IN SAID UPPER PORTION OF SAID TANK REACHES A PREDETERMINED TEMPERATURE APPROXIMATELY THE SAME AS SAID FIRST PREDETERMINED TEMPERATURE, WHEREBY SAID SECOND ELECTRICAL HEATING ELEMENT IS PROVIDED WITH TWO LEVELS OF ENERGIZATION FOR AUTOMATIC FLEXIBILITY OF RECOVERY OF WATER TEMPERATURE WITHIN SAID TANK.
References Cited (Backward Citations)
US2380545A
Cited
US3246119A
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 |