Intruder detection system

Details Intruder detection system Intruder detection system

1975-08-20

1976-10-26

Swann, III, Glen R.

Communications: electrical

Systems

Call station

340 38L, G08B 1324

Patent

active

RE0290190

ABSTRACT:
An intruder detection system comprising a line adapted to be located substantially at ground level and consisting of an elongated high permeability magnetic core on which is wound a coil in the form of successive sections of respectively opposite winding handednesses, a high gain low noise amplifier coupled to the line and a detector coupled to the amplifier and adapted to be coupled to an alarm system.

REFERENCES:
patent: 1992214 (1935-02-01), Katz
patent: 2201146 (1940-05-01), Barker
patent: 2212986 (1940-08-01), Horni
patent: 2492182 (1949-12-01), Robinson
patent: 2955286 (1960-10-01), Klein
patent: 2976483 (1961-03-01), Moore et al.
patent: 2981950 (1961-04-01), Skidmore
patent: 3040248 (1962-06-01), Geyger
patent: 3068448 (1962-12-01), Mountjoy et al.
patent: 3140475 (1964-07-01), Spencer et al.
patent: 3159826 (1964-12-01), Morrison
patent: 3355707 (1967-11-01), Koerner
patent: 3371272 (1968-02-01), Stanton
patent: 3449703 (1969-06-01), Steen
patent: 3508238 (1970-04-01), Baker
patent: 3747036 (1973-07-01), Erdmann

Affiliated with

Also associated with

Rating

Intruder detection system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Intruder detection system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Intruder detection system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-176920