Keyless security system
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Dec 4, 2001
Grant Date -
N/A
app pub date -
May 11, 1995
filing date -
May 20, 1994
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A keyless security system which has eliminated the need for providing a vehicle-mounted receiver with an electric field detector, thereby achieving a simpler construction with resultant lower cost. The keyless security system is equipped with a portable transmitter for transmitting a remote control signal for locking and unlocking a vehicular door lock mechanism and a vehicle-mounted receiver which has a signal receiver for receiving the remote control signal, a signal processing unit for processing the remote control signal, and a control unit for monitoring each section of the vehicle and also for controlling the entire system. The control unit and the signal receiver are placed periodically in an activated condition and a standby condition. When the control unit detects the electric field of a received remote control signal, the control unit and the signal receiver are placed in a continuously activated condition. The remote control signal includes data information and idling information which precedes the data information and which is composed of bits of only 1 or 0. The idling information of the remote control signal received by the signal receiver is supplied to the control unit which then detects the electric field of the received remote control signal in accordance with the idling information.
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