Communications: electrical – Condition responsive indicating system – With particular coupling link
Patent
1994-11-18
1996-05-28
Crosland, Donnie L.
Communications: electrical
Condition responsive indicating system
With particular coupling link
340531, 340573, 368 11, 368 12, 379 37, 455 89, G08B 108
Patent
active
055215823
ABSTRACT:
A signalling device to be worn on the person includes an emergency button (2) which triggers an internal transmitter to transmit an encoded identification signal followed by audio signals derived from sounds picked up by a microphone (3). The transmitted signals are picked up by a control box (21) containing a radio receiver which encodes the signals and commands an alarm box (24) to send out an audible and/or visual warning. Such warnings alternate with periods in which the alarm box broadcasts sounds picked up by the microphone (3).
REFERENCES:
patent: 4056815 (1977-11-01), Anderson
patent: 4068097 (1978-01-01), Verriest
patent: 4092643 (1978-05-01), Stolarczyk
patent: 4510350 (1985-04-01), Wagner et al.
patent: 4819860 (1989-04-01), Hargrove et al.
patent: 4876710 (1989-10-01), Reed et al.
patent: 4906972 (1990-03-01), Spencer
patent: 5119072 (1992-06-01), Hemingway
patent: 5159315 (1992-10-01), Schultz et al.
Crosland Donnie L.
Dorman Ira S.
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