US3221319A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat detection system with testing means
Assignee: Individual
•
Filing: 1962-02-08
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Granted: 1965-11-30
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Expires: 1982-02-08
Abstract
No abstract record available.
Inventors
- 👤 Jr John E Lindberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:55
CPC Classifications
G; G08; G08B; G08B17/00; G08B17/06; A; A62; A62C; A62C3/00; A62C3/07; A62C3/08; B; B82; B82Y; B82Y30/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
154 words
A TEMPERATURE DETECTING SYSTEM, COMPRISING A FIRST TUBE CONTAINING REVERSIBLE HEAT-SENSITIVE GAS-EMITTING MEANS; A DIAPHRAGM; A HOUSING DIVIDED BY SAID DIAPHRAGM INTO TWO CHAMBERS, NAMELY, A FIRST CHAMBER IN COMMUNICATION WITH THE INTERIOR OF SAID TUBE AND A SECOND CHAMBER ISOLATED THEREFROM; SWITCH MEANS IN SAID SECOND CHAMBER CLOSED BY MOVEMENT OF SAID DIAPHRAGM; AN ELECTRICAL CIRCUIT CONNECTED ACROSS SAID SWITCH MEANS AND HAVING A NORMALLY-OPEN SENSITIVE RELAY THEREIN; SIGNAL MEANS ACTUATED BY SAID RELAY UPON ENERGIZATION THEREOF DUE TO CLOSURE OF SAID SWITCH MEANS; A SECOND TUBE OPENING INTO SAID FIRST CHAMBER AND OTHERWISE CLOSED; REVERSIBLE GASEMITTING MEANS IN SAID SECOND TUBE; ELECTRICAL HEATING MEANS FOR HEATING SAID GAS-EMITTING MEANS IN SAID SECOND TUBE; A NORMALLY CLOSED SWITCH IN SERIES WITH SAID ELECTRICAL HEATING MEANS AND OPENED BY SAID RELAY, UPON ENERGIZATION THEREOF; AND A NORMALLY OPEN MANUAL TEST SWITCH IN SERIES WITH BOTH SAID ELECTRICAL HEATING MEANS AND SAID NORMALLY CLOSED SWITCH.
Claim 2
Dependent Claim
154 words
A TEMPERATURE DETECTING SYSTEM, COMPRISING A FIRST TUBE CONTAINING REVERSIBLE HEAT-SENSITIVE GAS-EMITTING MEANS; A DIAPHRAGM; A HOUSING DIVIDED BY SAID DIAPHRAGM INTO TWO CHAMBERS, NAMELY, A FIRST CHAMBER IN COMMUNICATION WITH THE INTERIOR OF SAID TUBE AND A SECOND CHAMBER ISOLATED THEREFROM; SWITCH MEANS IN SAID SECOND CHAMBER CLOSED BY MOVEMENT OF SAID DIAPHRAGM; AN ELECTRICAL CIRCUIT CONNECTED ACROSS SAID SWITCH MEANS AND HAVING A NORMALLY-OPEN SENSITIVE RELAY THEREIN; SIGNAL MEANS ACTUATED BY SAID RELAY UPON ENERGIZATION THEREOF DUE TO CLOSURE OF SAID SWITCH MEANS; A SECOND TUBE OPENING INTO SAID FIRST CHAMBER AND OTHERWISE CLOSED; REVERSIBLE GASEMITTING MEANS IN SAID SECOND TUBE; ELECTRICAL HEATING MEANS FOR HEATING SAID GAS-EMITTING MEANS IN SAID SECOND TUBE; A NORMALLY CLOSED SWITCH IN SERIES WITH SAID ELECTRICAL HEATING MEANS AND OPENED BY SAID RELAY, UPON ENERGIZATION THEREOF; AND A NORMALLY OPEN MANUAL TEST SWITCH IN SERIES WITH BOTH SAID ELECTRICAL HEATING MEANS AND SAID NORMALLY CLOSED SWITCH.
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) | 1968-11-29 | 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 |