Patent ID: 7956721

Claim:
A system for controlling an access barrier comprising: a base operator to actuate the access barrier, said base operator adapted to communicate learning data only in a learn mode and receive operational data only when in an operate mode; and at least one hands-free mobile transmitter including a motion detector and a transceiver, said transceiver adapted to communicate learning data only when in said learn mode and transmit operational data only when in said operate mode, said at least one mobile transmitter and said base operator being learned to each other by exchanging learning data in said learn mode; said motion detector comprising an accelerometer which detects movement of said at least one hands-free mobile transmitter; and said at least one hands-free mobile transmitter only transmitting operational data to be received by said at least one hands-free mobile base operator to actuate the access barrier when said transmitter records acceleration values in at least two different axes, then sleeps for a predetermined period of time, then awakens to detect a first change of acceleration in at least one axis of motion from said recorded acceleration values and then confirms a second change of acceleration in at least one axis of motion the same as or different than detected at said first change of acceleration.