Patent
1983-03-07
1985-04-09
George, Keith E.
H04M 1104
Patent
active
045103500
ABSTRACT:
A personal alarm apparatus comprises a wrist mounted R.F. transmitter including a push button trigger and a relay station connected to the telephone line. The relay station on receipt of the transmitted alarm signal dials the first of up to four stored telephone numbers and repeats a digitized vocal message. The relay station includes means for sensing a touch-tone on the line to cease the message and a ring-tone sensor for counting rings in a call-back before intercepting the call and further repeating the message.
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Telephony, May 24, 1982, p. 140, "Plant Man's Notebook" edited by Ray Blain.
Shkawrytko Victor
Wagner Peter
Ade Stanley G.
Almicro Electronics Inc.
George Keith E.
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