Instead, doors open and switches engage automatically when the character approaches closely enough.

These new systems automatically engage the parking brake when the car is stopped and the transmission is set in park, or the engine turned off.

When the foot pressure is released, the brake automatically engages and stops the train.

He watched now as they automatically engaged and began pushing the ship into the channel that led to the sea.

The surveillance cameras any petty thief would know were hidden in every wall engaged automatically.

The necessary connections are made at the rear through contacts that automatically engage when the radio is pushed into the slot provided for it.

These weapons automatically engage incoming missiles and shoot them down before they can strike the ship.

Opening the action does not automatically engage the safety mechanism.

Modern doors had catches, it seemed, that engaged automatically.

Later, a third chute would automatically engage as he descended, but he never saw it.