Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1997-06-06
1998-06-23
Hofsass, Jeffery A.
Communications: electrical
Condition responsive indicating system
Specific condition
340632, 340521, G08B 1710
Patent
active
057710040
ABSTRACT:
A hazardous gas detection system is integrated into a wireless communication device such as a two-way radio. The radio has housing (102) with an opening (104) for receiving external air. A bellows-like device (114) has a first side (116) which is attached to an audio speaker diaphragm (112) by a rigid interconnect element (126). A fixed second side (118) of the bellows has first and second ports, 120 and 122. Vibrations from the speaker diaphragm are transferred to the bellows, causing the bellows to expand and contract. During bellows expansion, air is sucked into a first port (120) of the bellows. As the bellows contracts, the air is forced out through a second port (122) of the bellows and directed toward a gas sensor (132) mounted on an internal surface (106) of the radio housing. A warning mechanism in communication with the gas sensor provides forewarning of dangerously high gas concentration levels.
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Shaw Michael F.
Suppelsa Anthony B.
Suppelsa Anthony J.
Dorinski Dale W.
Gold Glenn E.
Hofsass Jeffery A.
Motorola Inc.
Pham Toan N.
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