US3867564A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual wire intruder detector
Assignee: Honeywell Inc
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Filing: 1974-04-01
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Granted: 1975-02-18
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Expires: 1994-04-01
Abstract
Abstract A perimeter security system comprising a strain sensitive line sensor in the form of dual magnetostrictive thin film plated wires having uniaxial anisotropy. The plated wire line sensor is preferably buried in a shallow trench or the like and detects intrusion in the vicinity of the line as the line sensor is stressed by the intruder causing a displacement of the earth. One of the dual plated wires is made to have a different degree of magnetostrictiveness than the other. The detection system is selectively sensitive to the motion of a mass on a surface, but tends to reject magnetic disturbances which effectively produce the same signal.
Inventors
- 👤 Vahram S Kardashian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:29
CPC Classifications
G; G01; G01L; G01L1/00; G01L1/12; G01L1/125; G08; G08B; G08B13/00; G08B13/22; G08B13/24; G08B13/2491; G08B13/2497; H; H01; H01B; H01B7/00; H10; H10N; H10N35/00; H10N35/101
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
110 words
AN IMPROVED STRAIN SENSITIVE THIN FILM PLATED WIRE ASSEMBLY FOR USE IN A LINE SENSOR DETECTION SYSTEM, THE IMPROVED PLATED WIRE ASSEMBLY COMPRISING: A FIRST WIRE ON WHICH IS PLATED AN ANISOTROPIC THIN FILM HAVING A FIRST COMPOSITION OF NICKEL-IRON ALLOY PLATING WHICH EXHIBITS A FIRST DEGREE OF MAGNETOSTRICTIVE RESPONSE, A SECOND WIRE ON WHICH IS PLATED AN ANISOTROPIC THIN FILM HAVING A DIFFERENT COMPOSITION OF NICKEL-IRON ALLOY PLATING WHICH EXHIBITS A DIFFERENT DEGREE OF MAGNESTOSTRICTIVE RESPONSE; SAID FIRST AND SECOND WIRES EACH HAVING THE SAME RESPONSE TO A MAGNETIC FIELD; INSULATIVE COVERING MEANS ENCLOSING SAID FIRST AND SECOND WIRES, AND METALLIC SHEILDING MEANS SURROUNDING SAID FIRST AND SECOND WIRES.
Claim 2
Dependent Claim
110 words
AN IMPROVED STRAIN SENSITIVE THIN FILM PLATED WIRE ASSEMBLY FOR USE IN A LINE SENSOR DETECTION SYSTEM, THE IMPROVED PLATED WIRE ASSEMBLY COMPRISING: A FIRST WIRE ON WHICH IS PLATED AN ANISOTROPIC THIN FILM HAVING A FIRST COMPOSITION OF NICKEL-IRON ALLOY PLATING WHICH EXHIBITS A FIRST DEGREE OF MAGNETOSTRICTIVE RESPONSE, A SECOND WIRE ON WHICH IS PLATED AN ANISOTROPIC THIN FILM HAVING A DIFFERENT COMPOSITION OF NICKEL-IRON ALLOY PLATING WHICH EXHIBITS A DIFFERENT DEGREE OF MAGNESTOSTRICTIVE RESPONSE; SAID FIRST AND SECOND WIRES EACH HAVING THE SAME RESPONSE TO A MAGNETIC FIELD; INSULATIVE COVERING MEANS ENCLOSING SAID FIRST AND SECOND WIRES, AND METALLIC SHEILDING MEANS SURROUNDING SAID FIRST AND SECOND WIRES.
Claim 3
Dependent Claim
34 words
The invention according to claim 1 in which the nickel-iron alloy plating first composition is nickel rich and has a negative magnetostriction and the second composition is iron rich and has a positive magnetostriction.
Claim 4
Dependent Claim
42 words
The invention according to claim 1 in which the nickel-iron alloy plating first composition is nickel rich and has a relatively high negative magnetostriction and the second composition is nickel rich to a lesser extent and has a lesser negative magnetostrictive response.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-17 | 1978-08-19 | 1979-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-17 | 1982-08-19 | 1983-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-17 | 1986-08-19 | 1987-02-18 | $7700.00 | Window Closed / Lapsed |