Security system with membrane switches to detect binary code on

Details Security system with membrane switches to detect binary code on Security system with membrane switches to detect binary code on

1991-03-18

1994-05-03

Yusko, Donald J.

Communications: electrical

Continuously variable indicating

With meter reading

340426, 70277, H04Q 100

Patent

active

053091523

ABSTRACT:
The Code Key is substantially the same size and shape as a conventional key with cuts and slopes that actuate pin tumblers as in a conventional lock. However, instead of the tumblers being aligned by the key to permit mechanical rotation of the lock cylinder, the tumblers close selected sealed switches to create an electrical digital code. This code is compared to a preset code and upon matching of the two codes electrical unlocking and circuit enabling takes place. The unit into which the Code Key is inserted has the approximate shape, and outwardly appears the same, as a conventional lock. This unit, which can be referred to as a translator, has no mechanical connection to the door latch or circuit controls and thus no mechanical actions by an intruder can open the door or otherwise defeat the system. The Code Key Security System (CKSS) provides much more effective entry control for automobiles and other vehicles due to the absence of all mechanical locks and linkages, and includes all necessary controls for a total security system. In addition to vehicles, there are many other applications that can benefit from the added security of replacing mechanical locks and keys with translators and Code Keys. Further, the CKSS can be readily programmed for any desired code, and multiple codes and special functions can be provided.

REFERENCES:
patent: 3500326 (1970-03-01), Benford
patent: 3631301 (1971-12-01), Goldman
patent: 4123745 (1978-10-01), Gurgone
patent: 4132487 (1979-01-01), Fisher
patent: 4315247 (1982-02-01), Germanton
patent: 4390758 (1983-06-01), Hendrickson
patent: 4392133 (1983-07-01), Lundgren

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