Radio signal receiving apparatus with a security circuitry

Details Radio signal receiving apparatus with a security circuitry Radio signal receiving apparatus with a security circuitry

1980-12-05

1983-03-29

Caldwell, Sr., John W.

Communications: electrical

Systems

Nonselective paging

34082544, 34082532, 340539, 455 26, H04Q 130, G08B 522

Patent

active

043785514

ABSTRACT:
A radio signal receiving apparatus such as a pager with a security circuitry includes operator-controlled switches for providing a plurality of different command signals which are used to actuate the receiving apparatus in a different mode of operation, an interface circuitry with an optional feature circuitry coupled to the receiving circuitry of the apparatus for providing various optional functions such as automatic reset, single/dual function or battery saving functions to the receiving apparatus, and a security circuitry for preventing the receiving apparatus from receiving the incoming signal once tampering of the optional feature security is detected.

REFERENCES:
patent: 3228020 (1966-01-01), Gassenheimer et al.
patent: 3261107 (1966-07-01), Ponczek et al.
patent: 3760134 (1973-09-01), McCray
patent: 3768090 (1973-10-01), Williams
patent: 3769593 (1973-10-01), Williams
patent: 4149158 (1979-04-01), Iwaoka et al.

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