Device to facilitate the arming of an alarm system and to provid

Details Device to facilitate the arming of an alarm system and to provid Device to facilitate the arming of an alarm system and to provid

1985-08-29

1987-07-07

Crosland, Donnie L.

Communications: electrical

Condition responsive indicating system

With particular system function

340542, 340543, 340527, 340528, 361171, 361172, 70267, 70268, G08G 2300, E05B 4506

Patent

active

046790314

ABSTRACT:
A burglarproof device which can facilitate the activation of an alarm system and can provide lock-out protection. It uses a set of correct-signal generating reed switches and a set of incorrect-signal generating reed switches to activate the alarm signal, and the input of a correct signal within the preset lock-out time after receipt of an incorrect signal will not be able to open the door lock or disarm the alarm system.

REFERENCES:
patent: 3755776 (1973-08-01), Kotras
patent: 4095239 (1978-06-01), Gerry
patent: 4258346 (1981-03-01), Williams
patent: 4258358 (1981-03-01), Lee et al.
patent: 4333090 (1982-06-01), Hirsch
"Seco-Larm", Superior Electronics Corporation, Taiwan, Jan. 30, 1987.
"Original Car Gard", Ljunggren & Riise, Lidingo, Sweden, Jan. 30, 1987.

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