US3221318A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Visual indicator for heat controller
Assignee: General Electric Co
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Filing: 1961-12-08
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Granted: 1965-11-30
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Expires: 1981-12-08
Abstract
No abstract record available.
Inventors
- 👤 Douglas W Quirk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:52
CPC Classifications
F; F24; F24C; F24C15/00; F24C15/10; F24C15/102; F24C15/106
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
159 words
IN AN ELECTRIC HEATING SYSTEM INCLUDING AN ELECTRIC HEATING UNIT, AND A SOURCE OF ELECTRIC POWER; THE COMBINATION COMPRISING AN OSCILLATOR OPERATIVE AT A FREQUENCY WITHIN A GIVEN RANGE, A MANUALLY OPERABLE CONTROLLER HAVING AN OFF POSITON AND A VARIABLE RANGE OF ON POSITIONS, MEANS RESPONSIVE TO OPERATION OF SAID CONTROLLER INTO ITS OFF POSITION FOR DISCONNECTING SAID SOURCE FROM BOTH SAID HEATING UNIT AND SAID OSCILLATOR AND RESPONSIVE TO OPERATION OF SAID CONTROLLER INTO ITS VARIABLE RANGE OF ON POSITIONS FOR CONNECTING SAID SOURCE TO BOTH SAID HEATING UNIT AND SAID OSCILLATOR, WHEREBY OPERATION OF SAID OSCILLATOR IS INITIATED WHEN SAID SOURCE IS CONNECTED THERETO AND OPERATION OF SAID OSCILLATOR IS ARRESTED WHEN SAID SOURCE IS DISCONNECTED THEREFROM, MEANS RESPONSIVE TO OPERATION OF SAID CONTROLLER IS ONE DIRECTION IN ITS VARIABLE RANGE OF ON POSITIONS FOR CORRESPONDINGLY INCREASING BOTH THE POWER SUPPLIED TO SAID HEATING UNIT AND THE OPERATING FREQUENCY OF SAID OSCILLATOR WITHIN SAID GIVEN RANGE, AND,
Claim 2
Dependent Claim
159 words
IN AN ELECTRIC HEATING SYSTEM INCLUDING AN ELECTRIC HEATING UNIT, AND A SOURCE OF ELECTRIC POWER; THE COMBINATION COMPRISING AN OSCILLATOR OPERATIVE AT A FREQUENCY WITHIN A GIVEN RANGE, A MANUALLY OPERABLE CONTROLLER HAVING AN OFF POSITON AND A VARIABLE RANGE OF ON POSITIONS, MEANS RESPONSIVE TO OPERATION OF SAID CONTROLLER INTO ITS OFF POSITION FOR DISCONNECTING SAID SOURCE FROM BOTH SAID HEATING UNIT AND SAID OSCILLATOR AND RESPONSIVE TO OPERATION OF SAID CONTROLLER INTO ITS VARIABLE RANGE OF ON POSITIONS FOR CONNECTING SAID SOURCE TO BOTH SAID HEATING UNIT AND SAID OSCILLATOR, WHEREBY OPERATION OF SAID OSCILLATOR IS INITIATED WHEN SAID SOURCE IS CONNECTED THERETO AND OPERATION OF SAID OSCILLATOR IS ARRESTED WHEN SAID SOURCE IS DISCONNECTED THEREFROM, MEANS RESPONSIVE TO OPERATION OF SAID CONTROLLER IS ONE DIRECTION IN ITS VARIABLE RANGE OF ON POSITIONS FOR CORRESPONDINGLY INCREASING BOTH THE POWER SUPPLIED TO SAID HEATING UNIT AND THE OPERATING FREQUENCY OF SAID OSCILLATOR WITHIN SAID GIVEN RANGE, AND,
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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) | 1968-11-29 | 1969-05-31 | 1969-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-29 | 1973-05-31 | 1973-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-29 | 1977-05-31 | 1977-11-30 | $7700.00 | Window Closed / Lapsed |