US3171595A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Controls for air heating systems
Assignee: YORK-LUXAIRE Inc A CORP OF DE
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Filing: 1962-03-09
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Granted: 1965-03-02
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Expires: 1982-03-09
Abstract
No abstract record available.
Inventors
- 👤 Vincent G Krenke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:11
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/20; G05D23/24; G05D23/1927; G05D23/193; G05D23/1931
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
IN A SPACE HEATING SYSTEM INCLUDING A HOT AIR FURNACE HAVING AN AIR HEATING EXCHANGER, HAVING A MOTOR DRIVEN FAN FOR MOVING AIR OVER SAID HEAT EXCHANGER AND INTO SAID SPACE, AND HAVING FUEL BURNING MEANS INCLUDING A FUEL VALVE FOR HEATING SAID EXCHANGER, THE COMBINATION OF MEANS INCLUDING A FIRST TRANSISTOR FOR CONTROLLING SAID VALVE, MEANS INCLUDING A SECOND TRANSISTOR FOR CONTROLLING THE CONDUCTION OF SAID FIRST TRANSISTOR, MEANS INCLUDING FIRST MEANS RESPONSIVE TO THE TEMPERATURE OF SAID SPACE FOR CONTROLLING THE CONDUCTION OF SAID SECOND TRANSISTOR, MEANS INCLUDING A THIRD TRANSISTOR FOR ENERGIZING THE MOTOR OF SAID FAN, AND MEANS INCLUDING SECOND MEANS RESPONSIVE TO THE TEMPERATURE OF SAID EXCHANGER FOR CONTROLLING THE CONDUCTION OF SAID SECOND AND THIRD TRANSISTORS, SAID FIRST AND SECOND MEANS HAVING ELECTRICAL RESISTANCE WHICH VARY WITH TEMPERATURE.
Claim 2
Dependent Claim
134 words
IN A SPACE HEATING SYSTEM INCLUDING A HOT AIR FURNACE HAVING AN AIR HEATING EXCHANGER, HAVING A MOTOR DRIVEN FAN FOR MOVING AIR OVER SAID HEAT EXCHANGER AND INTO SAID SPACE, AND HAVING FUEL BURNING MEANS INCLUDING A FUEL VALVE FOR HEATING SAID EXCHANGER, THE COMBINATION OF MEANS INCLUDING A FIRST TRANSISTOR FOR CONTROLLING SAID VALVE, MEANS INCLUDING A SECOND TRANSISTOR FOR CONTROLLING THE CONDUCTION OF SAID FIRST TRANSISTOR, MEANS INCLUDING FIRST MEANS RESPONSIVE TO THE TEMPERATURE OF SAID SPACE FOR CONTROLLING THE CONDUCTION OF SAID SECOND TRANSISTOR, MEANS INCLUDING A THIRD TRANSISTOR FOR ENERGIZING THE MOTOR OF SAID FAN, AND MEANS INCLUDING SECOND MEANS RESPONSIVE TO THE TEMPERATURE OF SAID EXCHANGER FOR CONTROLLING THE CONDUCTION OF SAID SECOND AND THIRD TRANSISTORS, SAID FIRST AND SECOND MEANS HAVING ELECTRICAL RESISTANCE WHICH VARY WITH TEMPERATURE.
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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) | 1968-03-01 | 1968-08-31 | 1969-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-01 | 1972-08-31 | 1973-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-01 | 1976-08-31 | 1977-03-02 | $7700.00 | Window Closed / Lapsed |