and therefore not represented in detail a roller is seated in the area of the convergently arranged sliding faces between the legs of a u shaped brake beam 33 and can be vertically displaced in relation to the sliding faces and in the process places the brake linings 51 52 of the rotor brake 46 against the rotor shaft 5 in a known manner the rotor brake 46 and the expander roller 8 are connected with each other via a common activating mechanism in such a way that when the spinning device is opened i e in the course of the backward swing of the cover element 11 the expander roller 8 is lifted off the tangential belt 7 against the force of the spring element 41 and the brake linings 51 52 are simultaneously applied to the rotor shaft 5 as can be seen in fig1 to 3 the brake and locking lever 23 has a locking recess 44 in which an arresting roller 45 arranged on the cover element 11 is positively fixed in place when the cover element 11 is closed an advantageous embodiment of the present invention is represented in fig1 and 2 in a perspective plan view although different spinning devices are represented in the two drawing figures these spinning devices do not differ in principle so that components with the same reference numerals are identical in function the brake and locking lever 23 has a locking recess 44 in which an arresting roller 45 arranged on the cover element 11 is positively.