Base loop code transmitter

Details Base loop code transmitter Base loop code transmitter

1977-04-29

1978-10-03

Pitts, Harold I.

Communications: electrical

Systems

Signal box type

340287, 340506, 340635, G08B 2500

Patent

active

041186940

ABSTRACT:
A solid state code transmitter adapted for use with a conventional local fire alarm system in connection with installations that include a McCulloh loop circuit for the transmission of signals to a central proprietary fire alarm surveillance point. The transmitter circuit generates an electronic data word 17 bits long, the first 14 bits being field programmable by way of miniature DIP switches, each data word representing an equivalent of one round of generated code. During an ALARM input the transmitter circuit will generate four rounds of code, and will further generate one round when the ALARM input is removed; during a TROUBLE input, the circuit will generate two rounds of code and one round when that TROUBLE input is removed; during simultaneous ALARM and TROUBLE inputs, ALARM will take precedence; however, a one round restoration code will not be generated if either ALARM or TROUBLE inputs remain active while the other is removed, and upon removal of a second input (ALARM or TROUBLE), a one round restoration code will be generated.

REFERENCES:
patent: 3085235 (1963-04-01), Ward
patent: 3686668 (1972-08-01), Durkee
patent: 3701141 (1972-10-01), Andrews
patent: 3852718 (1974-12-01), Delyria
patent: 3883866 (1975-05-01), Kneeland

Affiliated with

Also associated with

Rating

Base loop code transmitter does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Base loop code transmitter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Base loop code transmitter will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1804340