Keyless access control and security system
First Claim
1. A piezoelectric touchpad unitary assembly adapted for mounting on a vehicle door, said touchpad assembly comprising a housing having a rear face adapted to bear against said vehicle on the outside thereof, said housing also having an accessible surface provided with plural indicia symbols indicating different areas of the surface which are to be tapped by a user to input commands into the touchpad;
- a plurality of piezoelectric sensors mounted individually adjacent the said indicia symbols between the latter and said rear face and adapted to emit individual signals at a high impedance level in response to individual tapping of indicia symbols by a user;
impedance level conversion means individual to each sensor and located immediately adjacent thereto for converting each of said high impedance level signals to a corresponding low impedance level signal adapted for individual and separate transmission to a remote location; and
individual conductor means for connecting the low impedance level signal from each of said impedance level conversion means to a corresponding individual terminal of a multiterminal connector mounted adjacent said rear face, an unshielded multiconductor cable extending from said multiterminal connector to said remote location, said multiconductor cable having connector means for mating with said multiterminal connector and thereby electrically connecting said individual terminals with respective conductors of said multiconductor cable.
1 Assignment
0 Petitions
Accused Products
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.
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Citations
22 Claims
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1. A piezoelectric touchpad unitary assembly adapted for mounting on a vehicle door, said touchpad assembly comprising a housing having a rear face adapted to bear against said vehicle on the outside thereof, said housing also having an accessible surface provided with plural indicia symbols indicating different areas of the surface which are to be tapped by a user to input commands into the touchpad;
- a plurality of piezoelectric sensors mounted individually adjacent the said indicia symbols between the latter and said rear face and adapted to emit individual signals at a high impedance level in response to individual tapping of indicia symbols by a user;
impedance level conversion means individual to each sensor and located immediately adjacent thereto for converting each of said high impedance level signals to a corresponding low impedance level signal adapted for individual and separate transmission to a remote location; and
individual conductor means for connecting the low impedance level signal from each of said impedance level conversion means to a corresponding individual terminal of a multiterminal connector mounted adjacent said rear face, an unshielded multiconductor cable extending from said multiterminal connector to said remote location, said multiconductor cable having connector means for mating with said multiterminal connector and thereby electrically connecting said individual terminals with respective conductors of said multiconductor cable. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
- a plurality of piezoelectric sensors mounted individually adjacent the said indicia symbols between the latter and said rear face and adapted to emit individual signals at a high impedance level in response to individual tapping of indicia symbols by a user;
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17. In an enclosure having an access opening and a closure movable between open and closed positions and power locking means for selectively locking and unlocking said closure in its closed position, said locking means being coupled electronically to a control unit operable to generate a plurality of discrete electrical pulses, and said locking and unlocking means comprising selective circuitry means responsive to the generation of a selected number of said pulses in a predetermined sequence to unlock and permit movement of said closure to its open position, normally inactive alarm means, and electrical means coupling said alarm means to said control unit and said selective circuitry means and operable to effect actuation of said alarm means in the event said control unit generates pulses in a sequence other than said predetermined sequence, the improvement comprising:
further circuit means, responsive to the generation of a concurrent number of chosen discrete electrical pulses by said control unit, which number is more than one but less than said plurality of discrete electrical pulses, for directly actuating said locking and unlocking means in response to said concurrent number of chosen discrete electrical pulses, to selectively lock said movable closure in its locked position. - View Dependent Claims (18, 19, 20, 21, 22)
Specification