US3171018A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature control
Assignee: BLUE M ELECTRIC Co
•
Filing: 1961-03-02
•
Granted: 1965-02-23
•
Expires: 1981-03-02
Abstract
No abstract record available.
Inventors
- 👤 Joseph A Lawler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:55
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/20; G05D23/24; G05D23/2451; G05D23/2456
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
IN A TEMPERATURE CONTROL SYSTEM, A HEATING ELEMENT, A SATURABLE REACTOR HAVING A CONTROLLED WINDING IN SERIES WITH THE ELEMENT AND A CONTROL WINDING, A TRANSFORMER HAVING A PRIMARY IN CIRCUIT ACROSS THE HEATING ELEMENT AND HAVING A SECONDARY IN SERIES WITH AN INDUCTOR AND THE INPUT OF A BRIDGE RECTIFIER; THE OUTPUT OF THE BRIDGE RECTIFIER BEING CONNECTED TO THE CONTROL WINDING. THE INDUCTOR BEING AN E-SHAPED CORE, AN I-SHAPED CORE MOUNTED FOR MOTION TOWARD AND AWAY FROM THE OPEN END OF THE E-SHAPED CORE, A TEMPERATURE RESPONSIVE BELLOWS HAVING A PISTON THEREON ENGAGING THE K-SHAPED CORE, A SCREW MOVING THE INDUCTOR TOWARD AND AWAY FROM THE PISTON, AND A CALIBRATED DIAL ASSOCIATED WITH THE SCREW.
Claim 2
Dependent Claim
117 words
IN A TEMPERATURE CONTROL SYSTEM, A HEATING ELEMENT, A SATURABLE REACTOR HAVING A CONTROLLED WINDING IN SERIES WITH THE ELEMENT AND A CONTROL WINDING, A TRANSFORMER HAVING A PRIMARY IN CIRCUIT ACROSS THE HEATING ELEMENT AND HAVING A SECONDARY IN SERIES WITH AN INDUCTOR AND THE INPUT OF A BRIDGE RECTIFIER; THE OUTPUT OF THE BRIDGE RECTIFIER BEING CONNECTED TO THE CONTROL WINDING. THE INDUCTOR BEING AN E-SHAPED CORE, AN I-SHAPED CORE MOUNTED FOR MOTION TOWARD AND AWAY FROM THE OPEN END OF THE E-SHAPED CORE, A TEMPERATURE RESPONSIVE BELLOWS HAVING A PISTON THEREON ENGAGING THE K-SHAPED CORE, A SCREW MOVING THE INDUCTOR TOWARD AND AWAY FROM THE PISTON, AND A CALIBRATED DIAL ASSOCIATED WITH THE SCREW.
References Cited (Backward Citations)
US2079466A
Cited
US2133919A
Cited
US2293502A
Cited
US2276822A
Cited
US2266608A
Cited
US2610287A
Cited
US2720579A
Cited
US2767296A
Cited
US2769076A
Cited
US2879489A
Cited
US2832876A
Cited
US2943176A
Cited
US2910569A
Cited
US3005969A
Cited
US3069087A
Cited
US3032705A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-02-23 | 1968-08-24 | 1969-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-23 | 1972-08-24 | 1973-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-23 | 1976-08-24 | 1977-02-23 | $7700.00 | Window Closed / Lapsed |