Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1995-03-23
1996-07-30
Swann, Glen
Communications: electrical
Condition responsive indicating system
Specific condition
200 5109, 200 6171, 200DIG2, 340521, 340540, 340693, G08B 2100
Patent
active
055415792
ABSTRACT:
A personal alarm safety system warning device will sound an audible alarm when a firefighter is motionless for a predetermined time such as thirty seconds or one minute, and optionally, if the temperature rises beyond a certain level or if the temperature is increasing at a rate above a certain predetermined rate of increase. The alarm system is incorporated in the buckle of the firefighter's air breathing pack harness in such a manner that any time the firefighter buckles the belt for the harness the personal alarm safety system is moved from the Off condition to a armed Standby (On) position ready to set off the alarm when any of the predetermined conditions are met. The device may also be manually activated by the firefighter. In order to turn the device off, not only must the belt buckle be disengaged, a safety switch detent must be manipulated by the firefighter. Thus it is impossible, once the firefighter has donned the harness for the air breathing apparatus, to accidentally completely turn off the personal alarm safety system device except by two intentional distinct and independent movements.
REFERENCES:
patent: 4884067 (1989-11-01), Nordholm et al.
patent: 4906972 (1990-03-01), Spencer
patent: 5157378 (1992-10-01), Stumberg et al.
Spellman, Jr. Martin J.
Swann Glen
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