Pressurized security barrier and alarm system

Details Pressurized security barrier and alarm system Pressurized security barrier and alarm system

1994-04-26

1995-04-11

Swann, Glen

Communications: electrical

Condition responsive indicating system

Specific condition

340541, 340626, G08B 1320

Patent

active

054062586

ABSTRACT:
A security barrier for placement across a passageway is made up of interconnected pressurized tubing made up in a grid pattern with openings too small to allow passage. The tubing is connected to a pressure switch, located away from the barrier site, which activates an alarm upon occurrence of a pressure drop. A reinforcing bar is located inside and along the length of the tubing so as to cause the tubing to rupture and set off the alarm upon an intruder's making an attempt to crimp and seal off a portion of the tubing by application of a hydraulic tool. Radial and rectangular grid patterns are disclosed.

REFERENCES:
patent: 741573 (1903-10-01), Ballou
patent: 3753260 (1973-08-01), Nelkin et al.
patent: 4791410 (1988-12-01), Larsson

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