Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1996-01-26
1997-06-17
Hofsass, Jeffery
Communications: electrical
Condition responsive indicating system
Specific condition
340632, 200 6174, G08B 2300
Patent
active
056401485
ABSTRACT:
A holder for a personal alert safety system (PASS) has a bracket to receive the PASS, and a housing connected to the bracket. An additional activation switch is installed in the PASS, the additional switch being magnetically operable. The housing is connected to the air line of a self contained breathing apparatus (SCBA). A piston or diaphragm is urged in one direction by air pressure, and is urged in the opposite direction by a spring in the absence of air under pressure. When the piston is moved in the one direction, a magnet is disposed adjacent to the additional switch, and when the piston is moved in the opposite direction by the spring, the magnet is removed from adjacent to the additional switch so the PASS is automatically activated by the presence of air pressure in an activated SCBA. The PASS can be used without the SCBA and can be activated manually as is conventional, either attached to or removed from the SCBA.
REFERENCES:
patent: 4914422 (1990-04-01), Rosenfield et al.
patent: 5157378 (1992-10-01), Stumberg et al.
patent: 5317305 (1994-05-01), Campman
patent: 5541579 (1996-07-01), Kiernan
Gray Robert E.
Hefner Bruce A.
Hiltman Paul D.
Lewis R. David
Hofsass Jeffery
International Safety Instruments, Inc.
Middleton James B.
Rushing Mark S.
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