Integrated alarm transponder

Details Integrated alarm transponder Integrated alarm transponder

1988-11-21

1989-12-05

Crosland, Donnie L.

Communications: electrical

Condition responsive indicating system

With particular system function

340505, 340536, 34082508, 3408251, 34082514, 3408252, 34087013, G08B 2600

Patent

active

048855685

ABSTRACT:
A time multiplexed integrated alarm contact for reporting detected alarm conditions to a system controller in a hardwired alarm system and wherein distinguishable binary frequencies are used for synchronizing/responding and for programming the contact. During programming, an identity code is written into an included shift register and non-volatile memory defining the system reporting interval and the contact's reporting interval within the system interval. Controller initiated synchronizing signals induce each contact's status transmission with or without resetting an alarm buffer and whereby redundant alarm reports may be obtained.

REFERENCES:
patent: 4228424 (1980-10-01), LeNay et al.
patent: 4465904 (1984-08-01), Gottsegen et al.
patent: 4586040 (1986-04-01), Akiba et al.
patent: 4680582 (1987-07-01), Mejia
patent: 4742335 (1988-05-01), Vogt
patent: 4754262 (1988-06-01), Hackett et al.

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