Security installation

Details Security installation Security installation

1983-10-07

1987-03-24

Crosland, Donnie L.

Communications: electrical

Condition responsive indicating system

With particular coupling link

340543, 340 63, 34082569, 34082522, 34082531, 3408255, 180287, 361171, 455 92, G08B 108, H04Q 700

Patent

active

046528601

ABSTRACT:
A security installation with a portable transmitter and a receiver arranged at the object to be protected for an IR, respectively, UHF code signal which is changeable at least in part; alone the code signal of the transmitter can be changed upon random command and can be written into the associated storage device of the transmitter.

REFERENCES:
patent: 4143368 (1979-03-01), Route et al.
patent: 4354189 (1982-10-01), Lemelson
patent: 4360801 (1982-11-01), Duhame
patent: 4383242 (1983-05-01), Sassover et al.
patent: 4422071 (1983-12-01), deGraaf
patent: 4535333 (1985-08-01), Twardowski

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