CURRENT COLLECTOR Russian patent published in 1995 - IPC

FIELD: electrical engineering. SUBSTANCE: current collector has contact ring 1, multielement brush 3, brush holder 2 in the form of spiral, mainly Archimedean, located in hole 4 of elements of brush 3. Elements of brush 3 as they wear out move under action of pressure spring 5, mainly roll, from outer end of spiral to inner one. Turns of spiral of brush holder 2 are arranged around contact ring 1. When current collector is used on commutator electric machine number of brushes n corresponds to number of poles of machine. Adjacent brushes are shifted by angle π over circumference of commutator. On two-pole commutator brushes are placed in diametrical opposition, in particular. EFFECT: prolonged service life of current collector owing to increase of geometrical resource of brush. 5 cl, 8 dwg