Line integrated combination magnetic and strain line sensor

Details Line integrated combination magnetic and strain line sensor Line integrated combination magnetic and strain line sensor

1975-04-30

1976-06-29

Swann, III, Glen R.

Communications: electrical

Systems

Call station

324 34MA, 324 34PS, 340 38R, 340272, G08B 1322, G08B 1302

Patent

active

039672620

ABSTRACT:
The disclosed invention pertains to an intruder detection system incorporng paired sensors with minimum sensor balance restraints. The sensor requires as few as three generally parallel trenches and an end trench and thus is suitable for installation by unskilled personnel in a relatively short time period. The sensor of this invention may provide up to three intrusion alarms indicative of a magnetic disturbance alone, or of a combined magnetic and strain disturbance.

REFERENCES:
patent: 3723988 (1973-03-01), Kardashian
patent: 3750127 (1973-07-01), Ayers et al.
patent: 3754223 (1973-08-01), Shtrikman
patent: 3801976 (1974-04-01), Ross et al.
patent: 3825889 (1974-07-01), Koerner
patent: 3832704 (1974-08-01), Kardashian

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