US3293631A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Detection apparatus
Assignee: Honeywell Inc
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Filing: 1965-05-25
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Granted: 1966-12-20
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Expires: 1985-05-25
Abstract
No abstract record available.
Inventors
- 👤 Premack Joshua
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:02
CPC Classifications
G; G08; G08B; G08B13/00; G08B13/22; G08B13/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
IN AN INTRUDER DETECTION SYSTEM: A PAIR OF OSCILLATOR CIRCUITS EACH HAVING FREQUENCY DETERMINING PORTIONS SET TO YIELD OSCILLATIONS AT SUBTANTIALLY THE SAME AMPLITUDE AND FREQUENCY, ONE OSCILLATOR CIRCUIT BEING SLIGHTLY DETUNED FROM THE OTHER IN FREQUENCY; INTRUDER RESPONSIVE SYNCHRONIZING MEANS INTERCOUPLING THE FREQUENCY DETERMINING PORTIONS OF SAID CIRCUITS FOR MAINTAINING SAID OSCILLATIONS LOCKED IN SYNCHRONISM THROUGHOUT THE RANGE OF OPERATION OF THE SYSTEM, SAIS SYNCHRONIZING MEANS BEING CONDITION RESPONSIVE UPON THE INGRESS OF AN INTRUDER WITHIN THE EFFECTIVE RANGE OF THE SYSTEM WHICH TENDS TO CHANGE THE DEGREE OF INTERCOUPLING BETWEEN SAID CIRCUITS; MEANS SEPARATE FROM SAID INTERCOUPLING MEANS CONNECTED TO SAID CIRCUITS FOR DERIVING SIGNALS PROPORTIONS TO THE CHANGE IN INTERCOUPLING RESULTING FROM THE INGRESS OF SAID INTRUDER; AND ALARM MEANS RESPONSIVE TO A PREDETERMINED LEVEL OF SAID DERIVED SIGNAL FOR PROVIDING A PERCEPTIBLE INDICATION
Claim 2
Dependent Claim
137 words
IN AN INTRUDER DETECTION SYSTEM: A PAIR OF OSCILLATOR CIRCUITS EACH HAVING FREQUENCY DETERMINING PORTIONS SET TO YIELD OSCILLATIONS AT SUBTANTIALLY THE SAME AMPLITUDE AND FREQUENCY, ONE OSCILLATOR CIRCUIT BEING SLIGHTLY DETUNED FROM THE OTHER IN FREQUENCY; INTRUDER RESPONSIVE SYNCHRONIZING MEANS INTERCOUPLING THE FREQUENCY DETERMINING PORTIONS OF SAID CIRCUITS FOR MAINTAINING SAID OSCILLATIONS LOCKED IN SYNCHRONISM THROUGHOUT THE RANGE OF OPERATION OF THE SYSTEM, SAIS SYNCHRONIZING MEANS BEING CONDITION RESPONSIVE UPON THE INGRESS OF AN INTRUDER WITHIN THE EFFECTIVE RANGE OF THE SYSTEM WHICH TENDS TO CHANGE THE DEGREE OF INTERCOUPLING BETWEEN SAID CIRCUITS; MEANS SEPARATE FROM SAID INTERCOUPLING MEANS CONNECTED TO SAID CIRCUITS FOR DERIVING SIGNALS PROPORTIONS TO THE CHANGE IN INTERCOUPLING RESULTING FROM THE INGRESS OF SAID INTRUDER; AND ALARM MEANS RESPONSIVE TO A PREDETERMINED LEVEL OF SAID DERIVED SIGNAL FOR PROVIDING A PERCEPTIBLE 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) | 1969-12-19 | 1970-06-20 | 1970-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-19 | 1974-06-20 | 1974-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-19 | 1978-06-20 | 1978-12-20 | $7700.00 | Window Closed / Lapsed |