E Field balanced phase intrusion alarm

Details E Field balanced phase intrusion alarm E Field balanced phase intrusion alarm

1979-06-04

1981-03-03

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

340564, G08B 1326

Patent

active

042544130

ABSTRACT:
An improvement in Instrusion Alarms of the type wherein a field wire acts as a transmitting antenna to produce an electric field and wherein a sense antenna is placed in the vicinity of the field wire to detect an intruder wherein at least one pair of field wires are employed at the extremities of a vertical configuration with sense wires between the field wires. The movement of a large object in the vicinity of such a system produces an equal perturbation on both of the sense wires so that no alarm is set off while an actual intrusion will cause a difference which is detected and utilized to provide an alarm system which is less susceptible to false alarms than the usual alarm systems.

REFERENCES:
patent: 2355395 (1944-08-01), Rubenstein
patent: 2956269 (1960-10-01), Schmidt
patent: 2971184 (1961-02-01), Pearson et al.
patent: 3237105 (1966-02-01), Kalmus
patent: 3375511 (1968-03-01), Trimble et al.
patent: 4064499 (1977-12-01), Geiszler et al.

Affiliated with

Also associated with

Rating

E Field balanced phase intrusion alarm does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with E Field balanced phase intrusion alarm, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and E Field balanced phase intrusion alarm will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-82236