Intrusion detection transducers

Details Intrusion detection transducers Intrusion detection transducers

1977-12-27

1979-08-28

Kozma, Thomas J.

Inductor devices

With deformable or distortable coil and/or core

336181, 340 38R, 340551, 340566, H01F 2730

Patent

active

041662644

ABSTRACT:
The invention comprises a plurality of intrusion detection transducers connected together wherein each transducer has a central core extending along an axis and having a length along that axis defined as XL where X is an even number of at least two and L is a given length. At least one sensing winding wire is wound around the core to provide a first-hand winding of L/2 length, X-1 number of windings of length L, and a second end winding of L/2 length, each adjacent winding being a reverse polarity to the next adjacent winding. Means are provided to connect each transducer to the adjacent transducers such that the first end of one transducer connects to the second end of the adjacent transducer.

REFERENCES:
patent: 3173112 (1965-03-01), Welch
patent: 3257949 (1966-06-01), Mead
patent: 3747036 (1973-07-01), Erdmann
patent: 3754223 (1973-08-01), Shtrikman
patent: 3846790 (1974-11-01), Erdmann et al.
patent: 4001745 (1977-01-01), Goodman

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