Detection system with randomized transmissions

Details Detection system with randomized transmissions Detection system with randomized transmissions

1986-02-06

1988-03-29

Crosland, Donnie L.

Communications: electrical

Condition responsive indicating system

With particular coupling link

340531, 331 64, 331 78, 455 63, G08B 108

Patent

active

047346809

ABSTRACT:
A detection system having sending units for sending data signals representative of a condition, such as fire, smoke, intrusion, battery condition, or an emergency, to a central receiving unit. The sending units include a microcomputer which generates a pseudo-random number, waits for a number of cycle periods equal to the pseudo-random number, then activates a transmitter to send a data signal to the receiving unit. The randomized transmission prevents the synchronized clashing of transmitters.

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patent: 3492587 (1970-01-01), Hutton
patent: 3689888 (1972-09-01), Wootton
patent: 3713142 (1973-06-01), Getchell
patent: 3735353 (1973-05-01), Donovan et al.
patent: 4101872 (1978-07-01), Pappas
patent: 4161041 (1979-07-01), Butler et al.
patent: 4442426 (1984-04-01), Heuschmann et al.
patent: 4462022 (1984-07-01), Stolarczyk
patent: 4477809 (1984-10-01), Bose
patent: 4523184 (1985-06-01), Abel

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