US4132987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Security system
Assignee: Individual
•
Filing: 1977-10-26
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Granted: 1979-01-02
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Expires: 1997-10-26
Abstract
Abstract A security system of the type including one or more electrically-continuous closed loops for detecting the presence of an intruder wherein a breach in security indicative of the intrusion is sensed by a change in potential at a point along the line with which the closed loop is electrically connected.
Inventors
- 👤 Richard A. Devereaux
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:06
CPC Classifications
G; G08; G08B; G08B13/00; G08B13/02; G08B13/14; G08B13/1445; G08B13/1463; G08B13/12; G08B13/126
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
166 words
An electrical conductor for the transmission of electrical energy comprising: (a) a four conductor plug (b) a first conductor including one insulated elongated core member of positively-charged conducting material and an insulated elongated shield member of negatively-charged conducting material, each of the core and shield members being electrically connected at one of their respective ends to a respective one of the conductors of the plug, (c) a second conductor including an insulated elongated core member of negatively-charged conducting material and an insulated elongated shield member of positively-charged conducting material, each of the core and shield members being electrically connected at one of their respective ends to a respective one of the conductors of the plug, (d) a female phone jack connector connected to the first conductor at its free end, (e) a male phone jack connector connected to the second conductor at its free end, with the conductors of the first and second conductors being transposed when the male and female phone jack connectors are interconnected.
Claim 2
Dependent Claim
166 words
An electrical conductor for the transmission of electrical energy comprising: (a) a four conductor plug (b) a first conductor including one insulated elongated core member of positively-charged conducting material and an insulated elongated shield member of negatively-charged conducting material, each of the core and shield members being electrically connected at one of their respective ends to a respective one of the conductors of the plug, (c) a second conductor including an insulated elongated core member of negatively-charged conducting material and an insulated elongated shield member of positively-charged conducting material, each of the core and shield members being electrically connected at one of their respective ends to a respective one of the conductors of the plug, (d) a female phone jack connector connected to the first conductor at its free end, (e) a male phone jack connector connected to the second conductor at its free end, with the conductors of the first and second conductors being transposed when the male and female phone jack connectors are interconnected.
Claim 3
Dependent Claim
203 words
An alarm system for preventing theft of a protected area or equipment, said system including an electrically continuous closed looped circuit having input terminals through a conductor plug through which the looped circuit is energized, the looped circuit comprising : (a) a pair of serially-connected legs consisting of (b) a first conductor including one insulated elongated core member of positively charged conducting material and an insulated elongated shield member of negatively charged conducting material, each of the core and shield members being electrically connected at one of their respective ends to a respective one of the conductors of the plug, (c) a second conductor including an insulated elongated core member of negatively charged conducting material and an insulated elongated shield member of positively charged conducting material, each of the core and shield members being electrically connected at one of their respective ends to a respective one of the conductors of the plug, (d) a female phone jack connector connected to the first conductor at its free end, (e) a male phone jack connector connected to the second conductor at its free end, whereby the conductors of the first and second conductors are transposed when the male and female phone jack connectors are interconnected.
Claim 4
Dependent Claim
203 words
An alarm system for preventing theft of a protected area or equipment, said system including an electrically continuous closed looped circuit having input terminals through a conductor plug through which the looped circuit is energized, the looped circuit comprising : (a) a pair of serially-connected legs consisting of (b) a first conductor including one insulated elongated core member of positively charged conducting material and an insulated elongated shield member of negatively charged conducting material, each of the core and shield members being electrically connected at one of their respective ends to a respective one of the conductors of the plug, (c) a second conductor including an insulated elongated core member of negatively charged conducting material and an insulated elongated shield member of positively charged conducting material, each of the core and shield members being electrically connected at one of their respective ends to a respective one of the conductors of the plug, (d) a female phone jack connector connected to the first conductor at its free end, (e) a male phone jack connector connected to the second conductor at its free end, whereby the conductors of the first and second conductors are transposed when the male and female phone jack connectors are interconnected.
Claim 5
Dependent Claim
181 words
A security system for indicating intrusion comprised of electric power cables arranged for security purposes comprising: (a) a four conductor plug (b) a first conductor including one insulated elongated core member of positively charged conducting material and an insulated elongated shield member of negatively charged conducting material, each of the core and shield members being electrically connected at one of their respective ends to a respective one of the conductors of the plug, (c) a second conductor including an insulated elongated core member of negatively charged conducting material and an insulated elongated shield member of positively charged conducting material, each of the core and shield members being electrically connected at one of their respective ends to a respective one of the conductors of the plug, (d) interengageable male and female phone jack connectors connected to each of the first and second conductor at the free ends thereof for the transposing of the conductors of the first and second conductors when the male and female phone jack connectors are interconnected for service as an alarm circuit responsive to intrusion by a thief.
Claim 6
Dependent Claim
181 words
A security system for indicating intrusion comprised of electric power cables arranged for security purposes comprising: (a) a four conductor plug (b) a first conductor including one insulated elongated core member of positively charged conducting material and an insulated elongated shield member of negatively charged conducting material, each of the core and shield members being electrically connected at one of their respective ends to a respective one of the conductors of the plug, (c) a second conductor including an insulated elongated core member of negatively charged conducting material and an insulated elongated shield member of positively charged conducting material, each of the core and shield members being electrically connected at one of their respective ends to a respective one of the conductors of the plug, (d) interengageable male and female phone jack connectors connected to each of the first and second conductor at the free ends thereof for the transposing of the conductors of the first and second conductors when the male and female phone jack connectors are interconnected for service as an alarm circuit responsive to intrusion by a thief.
References Cited (Backward Citations)
US3938124A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-01-01 | 1982-07-03 | 1983-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-01 | 1986-07-03 | 1987-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-01 | 1990-07-03 | 1991-01-02 | $7700.00 | Window Closed / Lapsed |