How does telescopic gate work with only 1 motor

• The entire weight of the gate rests on the rails where the wheels moves on, therefore no hanging track needed.
• The active leaf is driven by the motor through the teeth racks.
• The passive leaf is driven by a chain-and-sprocket telescopic gear. It will travel as double speed.
• (1) motor; (2) rail; (3) travel limit; (4) top roller bracket; (5) safe strike; (6) teeth rack; (7) chain-and-sprocket drive.