Communications: electrical – Condition responsive indicating system – With particular coupling link
Patent
1976-07-13
1979-06-05
Caldwell, Sr., John W.
Communications: electrical
Condition responsive indicating system
With particular coupling link
340164B, 340527, 340531, 340573, 340574, 325111, 325118, 325102, 340307, G08B 108, H04Q 700
Patent
active
041575407
ABSTRACT:
The wireless alarm system comprises a portable wireless transmitter assembly adapted to be concealed on the person, a radio receiver and signal decoder for receiving a coded wireless signal transmitted by the radio transmitter, an adjustable timer and signal relay means for relaying the wireless alarm signal received by the radio receiver on to personnel alerting means a predetermined period of time after the wireless alarm signal is received by the radio receiver, and personnel alerting means activated by the alarm signal received from the adjustable timer and signal relay means. The portable wireless transmitter assembly comprises a pressure-actuated normally open contact switch adapted to be closed under pressure applied by the person, alerting means activated by the pressure actuated switch for alerting the person when said switch is closed, timer means activated by the pressure-actuated switch when said switch is closed, a radio transmitter activated by the timer means for transmitting a coded wireless alarm signal on at least one predetermined radio frequency, the timer means activating the radio transmitter a predetermined period of time after the pressure-actuated switch is closed, and a battery power supply for the signal feedback means, timer means and radio transmitter.
REFERENCES:
patent: 2681955 (1954-06-01), Davis
patent: 3257653 (1966-06-01), McCorkindale
patent: 3530451 (1970-09-01), Devine
patent: 3613005 (1971-10-01), Oschbach
patent: 3833895 (1974-09-01), Fecteau
patent: 3864674 (1975-02-01), Worsham et al.
patent: 3914692 (1975-10-01), Seaborn, Jr.
patent: 3956742 (1976-05-01), Karl
patent: 3983483 (1976-09-01), Pando
Anatronics Corporation
Caldwell Sr. John W.
Crosland Donnie L.
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