US3074053A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical system and method for protecting premises subject to varying ambient conditions
Assignee: American District Telegraph Co
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Filing: 1960-03-01
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Granted: 1963-01-15
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Expires: 1980-03-01
Abstract
No abstract record available.
Inventors
- 👤 Vincent T Mcdonough
- 👤 Pearson Howard
- 👤 Francis C Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:30
CPC Classifications
G; G08; G08B; G08B13/00; G08B13/22; G08B13/24; G08B13/2491; G08B13/2494; G08B17/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
AN ELECTRICAL PROTECTION SYSTEM FOR PROTECTING PREMISES SUBJECT TO VARYING AMBIENT CONDITIONS, COMPRISING FIRST AND SECOND ITEMS OF ELECTRICAL PROTECTION APPARATUS AT SAID PREMISES DISPOSED SO AS TO BE SUBJECT TO SAID AMBIENT CONDITIONS AND TO ALARM CONDITIONS, EACH OF SAID ITEMS INCLUDING ELECTRICAL PROTECTION MEANS TO PRODUCE AN ELECTRICAL ALARM SIGNAL UPON DETECTION OF AN ALARM CONDITION, EACH OF SAID LAST MENTIONED MEANS HAVING RESPECTIVELY DIFFERENT RESPONSE CHARACTERISTICS TO CHANGES IN AT LEAST ONE OF SAID AMBIENT CONDITIONS, AND SIGNAL RESPONSIVE MEANS ELECTRICALLY CONNECTED TO BOTH OF SAID ELECTRICAL PROTECTION MEANS, SAID SIGNAL RESPONSIVE MEANS BEING RESPONSIVE ONLY TO SUBSTANTIALLY SIMULTANEOUS PRODUCTION OF AN ALARM SIGNAL BY BOTH OF SAID ELECTRICAL PROTECTION MEANS TO TRANSMIT AN ALARM SIGNAL INDICATION.
Claim 2
Dependent Claim
120 words
AN ELECTRICAL PROTECTION SYSTEM FOR PROTECTING PREMISES SUBJECT TO VARYING AMBIENT CONDITIONS, COMPRISING FIRST AND SECOND ITEMS OF ELECTRICAL PROTECTION APPARATUS AT SAID PREMISES DISPOSED SO AS TO BE SUBJECT TO SAID AMBIENT CONDITIONS AND TO ALARM CONDITIONS, EACH OF SAID ITEMS INCLUDING ELECTRICAL PROTECTION MEANS TO PRODUCE AN ELECTRICAL ALARM SIGNAL UPON DETECTION OF AN ALARM CONDITION, EACH OF SAID LAST MENTIONED MEANS HAVING RESPECTIVELY DIFFERENT RESPONSE CHARACTERISTICS TO CHANGES IN AT LEAST ONE OF SAID AMBIENT CONDITIONS, AND SIGNAL RESPONSIVE MEANS ELECTRICALLY CONNECTED TO BOTH OF SAID ELECTRICAL PROTECTION MEANS, SAID SIGNAL RESPONSIVE MEANS BEING RESPONSIVE ONLY TO SUBSTANTIALLY SIMULTANEOUS PRODUCTION OF AN ALARM SIGNAL BY BOTH OF SAID ELECTRICAL PROTECTION MEANS TO TRANSMIT AN ALARM SIGNAL INDICATION.
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) | 1966-01-14 | 1966-07-16 | 1967-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-14 | 1970-07-16 | 1971-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-14 | 1974-07-16 | 1975-01-15 | $7700.00 | Window Closed / Lapsed |