Patent US6231587B1 successfully refreshed from Google Patents.
US3452345A
Expired / Lapsed
US
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Alarm monitoring system
Assignee: Kidde Inc
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Filing: 1966-07-15
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Granted: 1969-06-24
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Expires: 1986-07-15
Abstract
No abstract record available.
Inventors
- 👤 George Beverly Kinsey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:20
CPC Classifications
H; H04; H04M; H04M11/00; H04M11/04; G; G08; G08B; G08B29/00; G08B29/02; G08B29/04; G08B29/12; G08B29/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
365 words
IN AN ALARM MONITORING SYSTEM, THE COMBINATION OF TWO NORMALLY CLOSED PROTECTION CIRCUIT EACH INCLUDING AT LEAST ONE NORMALLY CLOSED ALARM SWITCH; FIRST AND SECOND CONTROL UNITS EACH CONNECTED TO A DIFFERENT ONE OF SAID PROTECTION CIRCUITS AND EACH HAVING A PROTECTING CONDITION FOR PRODUCING AN OUTPUT CURRENT OF A FIRST POLARITY WHEN THE PROTECTION CIRCUIT CONNECTED THERETO IS CLOSED AND HAVING A STANDBY CONDITION FOR PRODUCING AN OUTPUT CURRENT OF A SECOND POLARITY INDEPENDENT OF THE CONDITION OF THE PROTECTION CIRCUIT; FIRST AND SECOND INDICATING UNITS REMOTE FROM SAID CONTROL UNITS EACH FOR GIVING AN INDICATION WHEN A DIFFERENT ONE OF SAID PROTECTION CIRCUITS IS INTERRUPTED BY THE OPENING OF AN ALARM SWITCH THEREIN; A SIGNAL TRANSLATOR ADJACENT SAID CONTROL UNITS FOR RECEIVING THE OUTPUT OF SAID CONTROL UNITS AND FOR OPERATING THE INDICATING UNITS; FIRST AND SECOND CONDUCTIVE MEANS FOR PROVIDING FIRST AND SECOND PATHS FOR ELECTRICAL CURRENT BETWEEN SAID TRANSLATOR AND EACH OF SAID INDICATING UNITS, SAID TRANSLATOR INCLUDING MEANS FOR TRANSMITTING OVER SAID CONDUCTIVE MEANS SPACED ELECTRICAL PULSES OF A FIRST POLARITY AND HAVING A FIRST MAGNITUDE WHEN SAID FIRST CONTROL UNIT IS PRODUCING A PROTECTING CONDITION OUTPUT, MEANS FOR TRANSMITTING OVER SAID CONDUCTIVE MEANS SPACED ELECTRICAL PULSES OF A SECOND POLARITY HAVING SAID FIRST MAGNITUDE WHEN SAID SECOND CONTROL UNIT IS PRODUCING A PROTECTING CONDITION OUTPUT, MEANS FOR CHANGING THE MAGNITUDE OF SAID PULSES OF SAID FIRST POLARITY WHEN SAID FIRST CONTROL UNIT IS PLACED IN THE STANDBY CONDITION, AND MEANS FOR CHANGING THE MAGNITUDE OF SAID PULSES OF SAID SECOND POLARITY WHEN SAID SECOND CONTROL UNIT IS PLACED IN A STANDBY CONDITION, SAID FIRST INDICATING MEANS INCLUDING MEANS FOR GIVING AND INDICATION OF THE MAGNITUDE OF SAID FIRST POLARITY PULSES AND MEANS FOR ACTUATING AN ALARM WHEN SAID FIRST POLARITY PULSES ARE TERMINATED BY THE OPERATION OF AN ALARM SWITCH IN THE PROTECTION CIRCUIT CONNECTED TO SAID FIRST CONTROL UNIT, AND SAID SECOND INDICATING MEANS INCLUDING MEANS FOR GIVING AN INDICATION OF THE MAGNITUDE OF SAID SECOND POLARITY PULSES AND MEANS FOR ACTUATING AN ALARM WHEN SAID SECOND POLARITY PULSES ARE TERMINATED BY THE OPERATION OF AN ALARM SWITCH IN THE PROTECTION CIRCUIT CONNECTED TO SAID SECOND CONTROL UNIT.
Claim 2
Dependent Claim
365 words
IN AN ALARM MONITORING SYSTEM, THE COMBINATION OF TWO NORMALLY CLOSED PROTECTION CIRCUIT EACH INCLUDING AT LEAST ONE NORMALLY CLOSED ALARM SWITCH; FIRST AND SECOND CONTROL UNITS EACH CONNECTED TO A DIFFERENT ONE OF SAID PROTECTION CIRCUITS AND EACH HAVING A PROTECTING CONDITION FOR PRODUCING AN OUTPUT CURRENT OF A FIRST POLARITY WHEN THE PROTECTION CIRCUIT CONNECTED THERETO IS CLOSED AND HAVING A STANDBY CONDITION FOR PRODUCING AN OUTPUT CURRENT OF A SECOND POLARITY INDEPENDENT OF THE CONDITION OF THE PROTECTION CIRCUIT; FIRST AND SECOND INDICATING UNITS REMOTE FROM SAID CONTROL UNITS EACH FOR GIVING AN INDICATION WHEN A DIFFERENT ONE OF SAID PROTECTION CIRCUITS IS INTERRUPTED BY THE OPENING OF AN ALARM SWITCH THEREIN; A SIGNAL TRANSLATOR ADJACENT SAID CONTROL UNITS FOR RECEIVING THE OUTPUT OF SAID CONTROL UNITS AND FOR OPERATING THE INDICATING UNITS; FIRST AND SECOND CONDUCTIVE MEANS FOR PROVIDING FIRST AND SECOND PATHS FOR ELECTRICAL CURRENT BETWEEN SAID TRANSLATOR AND EACH OF SAID INDICATING UNITS, SAID TRANSLATOR INCLUDING MEANS FOR TRANSMITTING OVER SAID CONDUCTIVE MEANS SPACED ELECTRICAL PULSES OF A FIRST POLARITY AND HAVING A FIRST MAGNITUDE WHEN SAID FIRST CONTROL UNIT IS PRODUCING A PROTECTING CONDITION OUTPUT, MEANS FOR TRANSMITTING OVER SAID CONDUCTIVE MEANS SPACED ELECTRICAL PULSES OF A SECOND POLARITY HAVING SAID FIRST MAGNITUDE WHEN SAID SECOND CONTROL UNIT IS PRODUCING A PROTECTING CONDITION OUTPUT, MEANS FOR CHANGING THE MAGNITUDE OF SAID PULSES OF SAID FIRST POLARITY WHEN SAID FIRST CONTROL UNIT IS PLACED IN THE STANDBY CONDITION, AND MEANS FOR CHANGING THE MAGNITUDE OF SAID PULSES OF SAID SECOND POLARITY WHEN SAID SECOND CONTROL UNIT IS PLACED IN A STANDBY CONDITION, SAID FIRST INDICATING MEANS INCLUDING MEANS FOR GIVING AND INDICATION OF THE MAGNITUDE OF SAID FIRST POLARITY PULSES AND MEANS FOR ACTUATING AN ALARM WHEN SAID FIRST POLARITY PULSES ARE TERMINATED BY THE OPERATION OF AN ALARM SWITCH IN THE PROTECTION CIRCUIT CONNECTED TO SAID FIRST CONTROL UNIT, AND SAID SECOND INDICATING MEANS INCLUDING MEANS FOR GIVING AN INDICATION OF THE MAGNITUDE OF SAID SECOND POLARITY PULSES AND MEANS FOR ACTUATING AN ALARM WHEN SAID SECOND POLARITY PULSES ARE TERMINATED BY THE OPERATION OF AN ALARM SWITCH IN THE PROTECTION CIRCUIT CONNECTED TO SAID SECOND CONTROL UNIT.
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) | 1972-06-23 | 1972-12-23 | 1973-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-23 | 1976-12-23 | 1977-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-23 | 1980-12-23 | 1981-06-24 | $7700.00 | Window Closed / Lapsed |