Abstract: An identification system for a lift installation in which a lift user carries with him an information transmitter. The information transmitter communicates individual data, for example the weight of the lift user, to a recognition device, which files the data in a data bank. Lift users without information transmitters, so-called unauthorized travellers, are detected with the aid of a load-measuring device. A comparator compares the weight in a lift cage with the weight identified by means of the information transmitter to verify the identity of the lift user as the user to whom the information transmitter was assigned. In the case of agreement, a release signal issued to a lift control, which dispatches or otherwise permits operation of the lift cage.

Abstract: A friction wheel door drive for a sliding door for lifts consisting of at least one rectilinearly or curvilinearly moved door leaf (1), which is suspended of guide rollers (3) and is guided at a guide (2) is presented. At least one of the guide rollers (3) is formed as a motor roller (3') moving the door leaf and in the form of an outside rotor motor. The motor may be either a direct current motor with permanent magnets in the outside rotor and electronic commutation or a polyphase induction motor with a laminated outside rotor having a short-circuited winding and a laminated inner stator with a polyphase alternating current winding. Force transmission between the motor roller (3') and a running roller (3") may be provided by a transmission (18), between motor roller (3') and running roller (3") is possible.