Transferring or delivering roller - comprises shaft, concentrically running tube and 2 disengageable inwardly projecting bearing parts at roller end to allow driven or free rotation AB DE4040844A The end-driven carrying- or delivering roll (10) has a shaft (12), a tube (14) running concentrically to the shaft (12) is new. Two inwardly projecting, oppposed bearing parts are positioned in the space between the shaft (12) and the tube at the ends. The bearing parts are removable from the pipe and are mutually interchangeable. The inner surface (14c) of the tube (14) and the fist bearing part (18) is (in)directly frictionally- or pref. form-connected in the mounting position on the first tube end (14a). The other tube end (14b) is freely rotatable with and/or against the tube. The second bearing part is configured so that it is freely rotatable with the tube in the mounting positions at both tube ends. Tube-shaped bushings (22, 24) at both tube ends, extend into the tube and receive

摘要

A voltage and/or frequency signal corresp. to motor current or speed is monitored and compared with threshold values to determine whether the motor is running normally or not. If the motor is running abnormally, it is then repeatedly switched off and on until the normal condition is restored. The motor is pref. switched on and off a set number of times, and the presence of a fault determined after a set switch-on time. USE/ADVANTAGE - E.g. fan motors in vehicle air conditioning system. Gives high reliability of steady running.