A bearing isolator and explosion-proof current diverting device may be configured to dissipate an electrical charge from a rotating piece of equipment to ground, such as from a motor shaft to a motor housing. One aspect of an explosion-proof current diverter ring may include a stator that may be mounted to the equipment housing and a rotor that may be mounted to a shaft. The rotor may rotate with the shaft. A conductive assembly may be positioned in a radial bore formed in the stator such that the conductive assembly contacts the rotor to conduct electricity from the shaft to the housing through the explosion-proof current diverting device. The explosion-proof current diverting device may be configured to define a flame path to achieve various explosion-proof certifications.

A slip ring apparatus including a ring assembly having a conductive ring with a conductive ring engagement surface, a contact assembly having a contact element with a contact element engagement surface for engaging with the conductive ring engagement surface, and a surface discontinuity provided in at least one of the conductive ring engagement surface and the contact element engagement surface. An apparatus including the slip ring apparatus, wherein the apparatus includes a housing having an interior and a shaft rotatably extending through the interior of the housing. A method for reducing the potential of a hydroplaning effect in a slip ring apparatus, including providing a surface discontinuity in at least one of a conductive ring engagement surface and a contact element engagement surface.

A slip ring apparatus including a ring assembly having a conductive ring with a conductive ring engagement surface, a contact assembly having a contact element with a contact element engagement surface for engaging with the conductive ring engagement surface, and a surface discontinuity provided in at least one of the conductive ring engagement surface and the contact element engagement surface. An apparatus including the slip ring apparatus, wherein the apparatus includes a housing having an interior and a shaft rotatably extending through the interior of the housing. A method for reducing the potential of a hydroplaning effect in a slip ring apparatus, including providing a surface discontinuity in at least one of a conductive ring engagement surface and a contact element engagement surface.

A commutation apparatus for an electric machine, having brushes with a front face which lies against the peripheral surface of a collector which has a plurality of collector segments separated by gaps, is designed in such a manner that a contact edge which runs obliquely to the gaps is formed on the front face of at least one brush.

A commutation apparatus for an electric machine, having brushes with a front face which lies against the peripheral surface of a collector which has a plurality of collector segments separated by gaps, is designed in such a manner that a contact edge which runs obliquely to the gaps is formed on the front face of at least one brush.

An electric motor with contact commutation may include an external stator and an internal, rotatably mounted rotor. A magnet arrangement including at least one permanent magnet may be arranged fixedly on the rotor. A coil arrangement including at least one electric coil may be arranged fixedly on the stator. A contact commutation assembly may be in communication with the coil arrangement.

An electric motor with contact commutation may include an external stator and an internal, rotatably mounted rotor. A magnet arrangement including at least one permanent magnet may be arranged fixedly on the rotor. A coil arrangement including at least one electric coil may be arranged fixedly on the stator. A contact commutation assembly may be in communication with the coil arrangement.

There is provided a contact type power feeding apparatus in which, even if a brush Br disposed in a space between the axis body and the cylinder body that are disposed concentric with each other wears out as a result of sliding, contact can be surely secured between the brush and the axis body as well as the cylinder body, thereby efficiently causing electric current to flow between the two. A brush Br has first brush pieces each having an inner wall surface to make surface-contact with an outer peripheral surface of the axis body; and second brush pieces each having an outer wall surface to make a surface-contact with an inner peripheral surface of the cylinder body. The brush is constituted by alternately arranging, in the circumferential direction, the first brush pieces and the second brush pieces in a state of keeping them in surface-contact with each other. The side wall surfaces of the first brush pieces and the second brush pieces are respectively formed into a tapered shape which is inclined relative to the radial direction. Coil springs are disposed between the second brush pieces that are adjacent to each other, in order to give a biasing force in a direction to move the second brush pieces away from each other.

There is provided a contact type power feeding apparatus in which, even if a brush Br disposed in a space between the axis body and the cylinder body that are disposed concentric with each other wears out as a result of sliding, contact can be surely secured between the brush and the axis body as well as the cylinder body, thereby efficiently causing electric current to flow between the two. A brush Br has first brush pieces each having an inner wall surface to make surface-contact with an outer peripheral surface of the axis body; and second brush pieces each having an outer wall surface to make a surface-contact with an inner peripheral surface of the cylinder body. The brush is constituted by alternately arranging, in the circumferential direction, the first brush pieces and the second brush pieces in a state of keeping them in surface-contact with each other. The side wall surfaces of the first brush pieces and the second brush pieces are respectively formed into a tapered shape which is inclined relative to the radial direction. Coil springs are disposed between the second brush pieces that are adjacent to each other, in order to give a biasing force in a direction to move the second brush pieces away from each other.

There is provided a contact type power feeding apparatus in which, even if a brush Br disposed in a space between the axis body and the cylinder body that are disposed concentric with each other wears out as a result of sliding, contact can be surely secured between the brush and the axis body as well as the cylinder body, thereby efficiently causing electric current to flow between the two. A brush Br has first brush pieces each having an inner wall surface to make surface-contact with an outer peripheral surface of the axis body; and second brush pieces each having an outer wall surface to make a surface-contact with an inner peripheral surface of the cylinder body. The brush is constituted by alternately arranging, in the circumferential direction, the first brush pieces and the second brush pieces in a state of keeping them in surface-contact with each other. The side wall surfaces of the first brush pieces and the second brush pieces are respectively formed into a tapered shape which is inclined relative to the radial direction. Coil springs are disposed between the second brush pieces that are adjacent to each other, in order to give a biasing force in a direction to move the second brush pieces away from each other.