Abstract: A reinforcing bar binding machine is provided with a feed means for feeding a wire from a wire reel rotatably mounted on a binding machine body, a braking means for braking a rotation of the wire reel, and a control means that starts a braking to the rotation of the wire reel by the braking means after the wire is fed to a predetermined amount by the feed means.

Abstract: Provided is speed-adjustable life-saving apparatus which comprises a housing, a drum disposed in the housing, a life rope and a resistance wheel hub motor. One end of the life rope is fastened and wound on the drum. The resistance wheel hub motor disposed in the drum comprises a wheel hub, a speed-variable damper assembly, a shift and a rotor, and is supported in the housing by a main shaft. The wheel hub is fixedly connected to the drum and drives the rotor through the speed-variable damper assembly. A unilateral diode is connected to the circuit of the rotor through external leads. The speed-adjustable life-saving apparatus provided herein is safe, reliable and convenient to use.

Abstract: A drive for a roll changer with at least one motor (1a, 1b) for driving the roll changer has a driving electronic unit (9). The driving electronic unit drives the motor (1a, 1b), of which there is at least one, such that the motor (1a, 1b), of which there is at least one, acts as a drive and/or as a brake. A process is provided for driving or actuating a roll changer, where at least one motor (1a, 1b) of the roll changer is actuated or driven such that it acts as a drive or as a brake.