Fire alarm and heat detection system and apparatus

Details Fire alarm and heat detection system and apparatus Fire alarm and heat detection system and apparatus

Filed on

1987-12-07

Date issued

1989-03-21

Examiner

Swann III, Glen R.

Patent Class

Communications: electrical

SubClass

Condition responsive indicating system

SubSubClass

Specific condition

Other Related Categories

169 61, 340577, G08B 1702, G08B 1706

Type

Patent

Status

active

Patent number

048147664

Description

ABSTRACT:
A fire alarm and heat detection system and apparatus employs a thermoplastic film tape, of a plastic material which may or may not be heat shrinkable, e.g., polyvinyl chloride, polyethylene, polypropylene, rubber hydrochloride, polyvinylidene chloride, polyester, or nylon, having a substantial drop in tensil strength at a predetermined temperature. A conductor wire is supported on and extends for the entire length of the tape. The wire may be round in cross section or a flat foil and embedded in the tape or formed of two separate film tapes, heat sealed or adhesively laminated together or supported, by printing or the like, on the surface of a single tape. The tape and wire are supported across a supporting frame or yoke having supporting members spring loaded apart to apply a predetermined tension which may be preselected whereby the tape and wire will break on occurrence of a predetermined temperature. A circuit continuity monitoring device is connected to the conductor wire to detect interruption and an alarm mechanism connected thereto generates an alarm signal upon detection of the interruption of continuity of the conductor wire. The system differs from systems utilizing heat shrinkage of a plastic film in that the temperature of operation is variable while the heat shrinkage point is fixed for various plastic films.

REFERENCES:
patent: 4520352 (1985-05-01), Domingue
patent: 4575715 (1986-03-01), Forgione

Affiliated with

Also associated with

Rating

Fire alarm and heat detection system and apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-480087