Carbon brush and fastening a braided indicator wire therein
AssigneeSchunk Kohlenstofftechnik GmbH
InventorsAnton Swoboda, Edmund Kubler, Horst Ulm, Gunter Schardt
Life of this patent
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Abstract
The invention relates to a carbon brush (10) with a braided indicator wire (26), (28) for indicating a defined wear of the carbon brush. The braided indicator wire is embedded in a blind bore (30), and is disposed spaced apart from the bottom (32) of the blind bore. To assure an exact indication of the wear of the carbon brush, the bottom of the blind bore is covered with a layer (40) consisting of an insulating material.
Claims11
A carbon brush (10) extending in a longitudinal direction (16) from a contact surface with an indicator wire (28) for indicating a predetermined amount of wear of the carbon brush, a recess (30) is formed in the carbon brush, a portion (26) of the indicator wire is embedded in the recess which is in the form of a blind bore extending in the longitudinal direction of the carbon brush,
- said indicator wire comprising a braided conductive core (36) surrounded by an insulating sheath (38) and having a free conductive end (42),
- said portion (26) being spaced apart from flat bottom (32) of the recess, and insulating material disposed on the bottom,
- said insulating material forming an inherently rigid insulating layer (40) covering the bottom.
A carbon brush (10) extending a longitudinal direction (16) from a contact surface with an indicator wire (28) for indicating a predetermined amount of wear of the carbon brush, a recess (30) is formed in the carbon brush, a portion (26) of the indicator wire is embedded in the recess which is in the form of a blind bore extending in the longitudinal direction (16) from a flat bottom (32) of the carbon brush,
- said indicator wire comprising a braided conductive core (36) surrounded by an insulating sheath (38) and having a free conductive end (42),
- said portion (26) being spaced apart from the flat bottom of the recess, insulating material disposed on the bottom,
- said insulating material forming an inherently rigid insulating layer (40) covering the bottom and a thickness (b) of the insulating layer being equal to a distance (a) between outside of said conductive core (36) and an inner wall of said recess (30).
A carbon brush with an indicator wire for indicating a predetermined amount of wear, comprising:
- a carbon brush (10) extending in a longitudinal direction (16) from a contact surface,
- a recess (30) in the form of a blind bore having an axis substantially parallel to said longitudinal direction, an inner wall (34) and a flat bottom (32) perpendicular to the longitudinal direction,
- insulating material disposed on the flat bottom said insulating material forming a layer (40) having a predetermined thickness (b),
- an indicator wire (28) comprising a braided conductive core (36) surrounded by an insulating sheath (38), a portion (26) embedded in a center of said recess so that the conductive core (36) touches the insulating layer, and
- insulating, thermosetting material filling a space between said inner wall of said bore and the indicator wire.
Dependencies are inferred from the claim text.