US3202870A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic glower supply
Assignee: Individual
•
Filing: 1962-02-09
•
Granted: 1965-08-24
•
Expires: 1982-02-09
Abstract
No abstract record available.
Inventors
- 👤 Hugh R Carlon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:32
CPC Classifications
H; H05; H05B; H05B47/00; H05B47/10; H05B47/105; H05B47/11; Y; Y02; Y02B; Y02B20/00; Y02B20/40; Y10; Y10S; Y10S315/00; Y10S315/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
IN A DEVICE FOR STARTING AND MAINTAINING A GLOWER AT ITS OPERATING TEMPERATURE, THE COMBINATION COMPRISING: (A) A GLOWER, (B) A SOURCE OF ELECTRICAL ENERGY CONNECTED TO SAID GLOWER, (C) AN ELECTRICAL HEATER LOCATED IN THERMAL PROXIMITY TO AND ELECTRICALLY PARALLEL TO SAID GLOWER, (D) A VOLTAGE SENSITIVE RELAY IN PARALLEL TO SAID GLOWER CONTROLLING A SWITCH THEREIN SERIALLY CONNECTED TO SAID HEATER WHEREBY SAID HEATER IS TURNED ON WHEN SAID GLOWER IS COLD AND SAID HEATER IS TURNED OFF WHEN SAID GLOWER IS AT ITS OPERATING TEMPERATURE.
Claim 2
Dependent Claim
88 words
IN A DEVICE FOR STARTING AND MAINTAINING A GLOWER AT ITS OPERATING TEMPERATURE, THE COMBINATION COMPRISING: (A) A GLOWER, (B) A SOURCE OF ELECTRICAL ENERGY CONNECTED TO SAID GLOWER, (C) AN ELECTRICAL HEATER LOCATED IN THERMAL PROXIMITY TO AND ELECTRICALLY PARALLEL TO SAID GLOWER, (D) A VOLTAGE SENSITIVE RELAY IN PARALLEL TO SAID GLOWER CONTROLLING A SWITCH THEREIN SERIALLY CONNECTED TO SAID HEATER WHEREBY SAID HEATER IS TURNED ON WHEN SAID GLOWER IS COLD AND SAID HEATER IS TURNED OFF WHEN SAID GLOWER IS AT ITS OPERATING TEMPERATURE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-23 | 1969-02-22 | 1969-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-23 | 1973-02-22 | 1973-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-23 | 1977-02-22 | 1977-08-24 | $7700.00 | Window Closed / Lapsed |