Communications: electrical – Condition responsive indicating system – With particular coupling link
Patent
1978-09-06
1981-11-10
Caldwell, Sr., John W.
Communications: electrical
Condition responsive indicating system
With particular coupling link
340573, 340574, 116DIG17, 200 6158R, 200DIG2, 455100, G08B 108, H04Q 700
Patent
active
043001297
ABSTRACT:
A concealable signaling, e.g., radio alarm, device worn on the person and actuated by concealed switch means that include mechanical detents. The engagement of the detents provides secret tactile information back to the wearer. The presently preferred embodiment is a miniature radio alarm transmitter concealed in a device which also serves as a belt buckle. The wearer distends his waist to actuate the transmitter. Tension in the belt moves an element through one or more detent engagements before it activates the transmitter. These detent engagements make transient changes in the belt tension which are felt by the wearer; these inform the wearer of impending activation, so preventing false transmitter signals or alarms.
REFERENCES:
patent: 2681955 (1954-06-01), Davis
patent: 2766358 (1956-10-01), Davidson
patent: 3103660 (1963-09-01), Ticktin
patent: 3582935 (1971-06-01), Verhaeghe
patent: 3588858 (1971-06-01), Demuth
patent: 3608541 (1971-09-01), Hall
patent: 4121160 (1978-10-01), Cataldo
patent: 4157540 (1979-06-01), Oros
Caldwell Sr. John W.
Crosland Donnie L.
Zugelter Frank L.
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