Communications: electrical – Condition responsive indicating system – With particular coupling link
Patent
1987-04-29
1990-03-06
Orsino, Joseph A.
Communications: electrical
Condition responsive indicating system
With particular coupling link
340573, 340304, 340502, 34082545, G08B 108, G08B 2300
Patent
active
049069721
ABSTRACT:
A safety communications system for personel employed in hazardous areas is responsive to motion sensing, as well as to worker initiated check-in signals, for registering an alarm at a central station after an absence of input for a predetermined time period. Confirmation of check-in and emergency transmission is also provided to the worker as assurance of system operation and to provide a local alarm to guide rescue efforts.
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Orsino Joseph A.
Scutch III Frank M.
The Boeing Company
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