Selective calling arrangement

Details Selective calling arrangement Selective calling arrangement

1976-04-28

1978-02-21

Griffin, Robert L.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

325 64, 325364, 340147R, H04B 100

Patent

active

040755649

ABSTRACT:
A selective calling arrangement for use in a radio communications system or the like. Each of the receivers in the system is assigned an unique binary code number which is transmitted to the receivers by r.f. pulses of fixed width separated by one of two fixed intervals respectively representing a binary "1" or a binary "0", the selective calling system being unaffected by the chopping of pulses on the transmission path.

REFERENCES:
patent: 3114142 (1963-12-01), Bode et al.
patent: 3171098 (1965-02-01), Gabrielson
patent: 3335406 (1967-08-01), Clark
patent: 3510777 (1970-05-01), Gordon
patent: 4019138 (1977-04-01), Watanabe

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