Abstract: The invention concerns a device for clearing and/or activating an object, in particular a machine, with a codable key, an input device for inputting a code, a coding device for coding the key with the entered code, a reader for reading a code found on the key, an evaluation unit for evaluating this code, and a clearing device, which, when a code has been accepted by the evaluation unit, clears for use and/or activates the object depending upon the code, the code containing use-specific data such as customer identification, object identification, time period for use, and operational data for controlling the clearing device and/or the object. At least the input device, the coding device, the reader, and the clearing device are arranged on the object, and the key is coded by means of the coding device via the input device before the beginning of a single or repeated use of the object.

Abstract: A filter box for textile machines, especially spinning machines, comprising a filter subdividing a box into a raw air chamber and a clean air chamber, and a respective inlet opening and outlet opening communicating or connected with the raw air chamber. A ventilator is connected at its suction side with the clean air chamber. The filter possesses a cylindrical form and the inlet opening is formed by an inlet connection extending approximately tangentially with respect to the filter, in order to produce a spin flow in the raw air chamber.