Keyless access control and security system

Details Keyless access control and security system Keyless access control and security system

1983-12-07

1988-05-03

Caldwell, Sr., John W.

Communications: electrical

Selective

Having indication or alarm

340 64, 340365A, 340543, 34082532, 307 10AT, 361172, B60R 2500

Patent

active

047423277

ABSTRACT:
A keyless access control and security system especially adapted for use with an automobile and including a piezoelectric permutation touchpad unit which can be affixed, without requiring bodywork, to the outside of the vehicle's door in the key cylinder aperture. The touchpad is illuminated when touched and is therefore usable in the dark. The person seeking access must enter the correct access code combination on the touchpad to open the door and/or the trunk. The touchpad is connected to a remotely located logic circuit which controls access. The circuit provides for a signal of low intensity, indicating that a correction in the code entered into the touchpad should be made and, after a time delay, an alarm of high intensity, if no correction is made. Upon activation of the alarm, the head lights are flashed, the horn is sounded, or both. In order to enable a parking attendant, repairman, or some other authorized person to have access to the automobile without revealing the access code, the logic circuit can be programmed, by operation of the touchpad, using the proper access code and a further secondary code, arbitrarily selected, to provide access to the automobile in response to the secondary code, which later can be erased.

REFERENCES:
patent: 3544804 (1968-12-01), Gaumer
patent: 3609758 (1971-09-01), Buesing
patent: 3659154 (1972-04-01), Finn
patent: 3754213 (1973-08-01), Morroni et al.
patent: 3866168 (1975-02-01), McGuirk, Jr.
patent: 4205300 (1980-05-01), Ho et al.
patent: 4205325 (1980-05-01), Haygood et al.
patent: 4206491 (1980-07-01), Ligman
patent: 4232289 (1980-11-01), Daniel
patent: 4327353 (1982-04-01), Beard
patent: 4342024 (1982-07-01), Rossi
patent: 4437137 (1984-03-01), Mochida
patent: 4490639 (1984-12-01), Echols et al.

Affiliated with

Also associated with

Rating

Keyless access control and security system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Keyless access control and security system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Keyless access control and security system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1509097