Patent US3154772A successfully refreshed from Google Patents.
US3154772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prevention of false warning
Assignee: Individual
•
Filing: 1962-03-12
•
Granted: 1964-10-27
•
Expires: 1982-03-12
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 09:20
CPC Classifications
G; G08; G08B; G08B29/00; G08B29/18; G08B29/20; G08B29/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
216 words
AN ALARM CIRCUIT THAT WILL NOT BE SHORTED OUT TO GIVE FALSE WARNINGS IN THE PRESENCE OF MOISTURE AND OF ELECTROLYTIC SOLUTIONS, INCLUDING IN COMBINATION: A SOURCE OF ELECTRICAL CURRENT; INDICATOR MEANS IN SERIES WITH SAID SOURCE RESPONSIVE AFTER A SHORT TIME INTERVAL FOLLOWING APPLICATION OF ENERGY THERETO OF A PREDETERMINED MINIMUM POWER VALUE FOR OPERATION; ACTUATOR MEANS NORMALLY HAVING A HIGH IMPEDANCE STATE AND OPERABLE TO A LOW IMPEDANCE STATE, IN SERIES WITH SAID SOURCE AND SAID INDICATOR MEANS, AND PROVIDING, IN SAID HIGH IMPEDANCE STATE, SUFFICIENT IMPEDANCE IN SAID CIRCUIT TO HOLD THE CURRENT PASSING TO SAID INDICATOR MEANS BELOW SAID MINIMUM VALUE, AND WHEN IN SAID LOW IMPEDANCE STATE, CAUSING OPERATION OF SAID INDICATOR MEANS, SAID ACTUATOR MEANS ALSO HAVING EXPOSED NORMALLY CONDUCTIVE CONNECTIONS, WHICH, WHEN EXPOSED TO AN ELECTROLYTIC SOLUTION, TEND TO PROVIDE A BYPASS AROUND SAID ACTUATOR MEANS; AND MEANS INCLUDING SAID CURRENT, WHICH WOULD THEN TEND TO BE BYPASSED THROUGH SUCH AN ELECTROLYTIC SOLUTION, FOR PASSIVATING SAID CONNECTIONS IN THE EVENT OF SUCH BY-PASSING SO THAT AN IMPEDANCE BETWEEN SAID EXPOSED CONNECTIONS THROUGH SAID SOLUTION REACHES A VALUE PREVENTING BYPASSING OF SUFFICIENT CURRENT TO ACTUATE SAID INDICATOR MEANS WITHIN A TIME INTERVAL SHORTER THAN THAT BY WHICH THE INDICATOR MEANS CAN BE ACTUATED, SAID PASSIVATION ON AFFECTING NORMAL, TRUE-ALARM OPERATION.
Claim 2
Dependent Claim
216 words
AN ALARM CIRCUIT THAT WILL NOT BE SHORTED OUT TO GIVE FALSE WARNINGS IN THE PRESENCE OF MOISTURE AND OF ELECTROLYTIC SOLUTIONS, INCLUDING IN COMBINATION: A SOURCE OF ELECTRICAL CURRENT; INDICATOR MEANS IN SERIES WITH SAID SOURCE RESPONSIVE AFTER A SHORT TIME INTERVAL FOLLOWING APPLICATION OF ENERGY THERETO OF A PREDETERMINED MINIMUM POWER VALUE FOR OPERATION; ACTUATOR MEANS NORMALLY HAVING A HIGH IMPEDANCE STATE AND OPERABLE TO A LOW IMPEDANCE STATE, IN SERIES WITH SAID SOURCE AND SAID INDICATOR MEANS, AND PROVIDING, IN SAID HIGH IMPEDANCE STATE, SUFFICIENT IMPEDANCE IN SAID CIRCUIT TO HOLD THE CURRENT PASSING TO SAID INDICATOR MEANS BELOW SAID MINIMUM VALUE, AND WHEN IN SAID LOW IMPEDANCE STATE, CAUSING OPERATION OF SAID INDICATOR MEANS, SAID ACTUATOR MEANS ALSO HAVING EXPOSED NORMALLY CONDUCTIVE CONNECTIONS, WHICH, WHEN EXPOSED TO AN ELECTROLYTIC SOLUTION, TEND TO PROVIDE A BYPASS AROUND SAID ACTUATOR MEANS; AND MEANS INCLUDING SAID CURRENT, WHICH WOULD THEN TEND TO BE BYPASSED THROUGH SUCH AN ELECTROLYTIC SOLUTION, FOR PASSIVATING SAID CONNECTIONS IN THE EVENT OF SUCH BY-PASSING SO THAT AN IMPEDANCE BETWEEN SAID EXPOSED CONNECTIONS THROUGH SAID SOLUTION REACHES A VALUE PREVENTING BYPASSING OF SUFFICIENT CURRENT TO ACTUATE SAID INDICATOR MEANS WITHIN A TIME INTERVAL SHORTER THAN THAT BY WHICH THE INDICATOR MEANS CAN BE ACTUATED, SAID PASSIVATION ON AFFECTING NORMAL, TRUE-ALARM OPERATION.
References Cited (Backward Citations)
US1117240A
Cited
GB390346A
Cited
US2351587A
Cited
US2701965A
Cited
US2647237A
Cited
US2865832A
Cited
US3064245A
Cited
US3060416A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-10-27 | 1968-04-27 | 1968-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-27 | 1972-04-27 | 1972-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-27 | 1976-04-27 | 1976-10-27 | $7700.00 | Window Closed / Lapsed |