Pressure sensitive intrusion sensing line

Details Pressure sensitive intrusion sensing line Pressure sensitive intrusion sensing line

1980-11-28

1982-10-26

Shoop, William M.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310344, 310348, 340566, 340665, H01L 4104

Patent

active

043564232

ABSTRACT:
An intrusion sensing line to be buried or emersed in a medium and operative to deliver electrical signals in response to pressure changes as the medium is stressed, the line including multiple metal shells each having a transducer bonded to a flexible diaphragm surface inside the shell, and the shells being spaced apart and joined by soft metal tubing, the tubing and shells being metal-to-metal bonded at all joints and sealed to retain a dry inert gas, and the transducers being insulated from the shells to which they are bonded and wired together, preferably with alternating polarities, by insulated wiring extending through the tubing and the shells.

REFERENCES:
patent: 2592703 (1952-04-01), Jaffe
patent: 3868954 (1975-03-01), Ueda
patent: 3970878 (1976-07-01), Berglund
patent: 4012649 (1977-03-01), Cook
patent: 4097025 (1978-06-01), Dettmann
patent: 4186325 (1980-01-01), Gudzin
patent: 4194194 (1980-03-01), Redfern

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