Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1980-08-04
1985-12-10
Swann, III, Glen R.
Communications: electrical
Condition responsive indicating system
Specific condition
2541344, G08B 1312, E21C 2916
Patent
active
045583080
ABSTRACT:
The intrusion warning wire-lattice presents the outer appearance of a normal wire fence, and it has also the same mechanical resistance, but it comprises tubular wires which contain electrical and/or optical conductors connected to a warning system which is responsive to any variation of the capability of conduction of the conductors. The wire lattice comprises a serpentine coil made of tubular wire presenting rectilinear vertical lengths which are connected together by intersecting horizontal wires, among which there are also tubular wires. The fence sections are assembled between hollow box-type posts, at the interior of which there terminate the ends of the tubular wire and there is effected, by means of connectors, the connection between the conductors of each fence section.
REFERENCES:
patent: 3594770 (1971-07-01), Ham et al.
patent: 3725891 (1973-04-01), Miller
patent: 3837624 (1974-09-01), Dandurand
patent: 3927866 (1975-12-01), Linquist
patent: 4232310 (1980-11-01), Wilson
patent: 4234875 (1980-11-01), Williams
patent: 4293778 (1981-10-01), Williams
Ciordinik Jacques
Penzo Alessandro
CI.KA.RA. S.p.A.
Swann III Glen R.
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