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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
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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 01:27
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

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