CONTACT PIECE CONTAINING PRECIOUS METAL ON A SPRING SUPPORT HAVING A ROTATIONALLY SYMMETRICAL BENDING MOMENT
A spring contact for a sliding contact is provided having a terminal region and at least one contact region including an elongated spring element and a precious metal. The spring contact includes a conductive spring support and at least one contact piece. The spring support has essentially symmetrical rigidity in some regions in a plane perpendicular to the elongated extension of the spring support, and is made of a conductive material essentially free of precious metal. The contact piece(s) is/are conductively connected to the spring support, and has at least one surface to form the sliding contact. A surface of the contact piece(s) is made of a precious metal or a precious metal alloy. A slip ring transmitter for a motor or dynamo is also provided having a spring contact of this type, wherein the surface of the contact piece(s) touch(es) against the slip ring(s) in a conductive manner.
1 .- 12 . (canceled)
13 . A spring contact for a sliding contact having a terminal region ( 24 ) and at least one contact region comprising an elongated spring element and a precious metal, the spring contact comprising a conductive spring support ( 1 , 11 , 21 , 31 ) and at least one contact piece ( 2 , 12 , 22 , 32 ), wherein the spring support ( 1 , 11 , 21 , 31 ) has essentially symmetrical rigidity in some regions in a plane perpendicular to an elongated extension of the spring support ( 1 , 11 , 21 , 31 ), the spring support being made of a conductive material essentially free of precious metal, wherein the at least one contact piece ( 2 , 12 , 22 , 32 ) is conductively connected to the spring support ( 1 , 11 , 21 , 31 ) and comprises at least one surface to form the sliding contact, and wherein the at least one surface of the contact piece ( 2 , 12 , 22 , 32 ) comprises a material selected from a precious metal and a precious metal alloy.
14 . The spring contact according to claim 13 , wherein the at least one contact piece ( 2 , 12 , 22 , 32 ) has a shape selected from cylindrical, spherical, U-shaped, profiled with welding nipples, and semi-spherical.
15 . The spring contact according to claim 13 , wherein the at least one contact piece ( 2 , 12 , 22 , 32 ) consists of one of the following: a solid precious metal, a precious metal alloy, a jacketed wire ( 2 ), and a jacketed sphere ( 12 ) having a precious metal-containing jacket.
16 . The spring contact according to claim 13 , wherein the spring support ( 11 , 21 , 31 ) has a shape selected from flat, hollow and profiled at at least one connection ( 13 , 23 , 33 ) to the at least one contact piece ( 12 , 22 , 32 ).
17 . The spring contact according to claim 13 , wherein at least two contact pieces ( 22 , 32 ) are provided at two ends of a V-shaped spring support ( 21 , 31 ).
18 . The spring contact according to claim 17 , wherein the terminal region ( 24 ) is arranged at a middle of the spring support ( 21 , 31 ).
19 . The spring contact according to claim 18 , wherein the terminal region ( 24 ) is arranged centrally between to the two contact pieces ( 22 , 32 ).
20 . The spring contact according to claim 18 , wherein the terminal region has a flat embossing and bevels for bending of the V-shaped spring support ( 21 ).
21 . The spring contact according to claim 18 , wherein the terminal region has at least one notch ( 35 ) for bending of the V-shaped spring support ( 31 ).
22 . The spring contact according to claim 13 , wherein the spring support ( 1 , 11 , 21 , 31 ) is a spring wire having a round cross-section with symmetrical rigidity, at least in some regions, in the cross-sectional plane.
23 . The spring contact according to claim 13 , wherein the spring support ( 1 , 11 , 21 , 31 ) is a twisted leaf spring having symmetrical rigidity with respect to at least one region of the twisted leaf spring in a plane perpendicular to a torsion axis.
24 . The spring contact according to claim 13 , wherein at least one of the spring support ( 1 , 11 , 21 , 31 ) and the contact piece ( 2 , 12 , 22 , 32 ) comprises a piece of wire having a diameter of up to 2 mm.
25 . The spring contact according to claim 13 , wherein at least one of the spring support ( 1 , 11 , 21 , 31 ) and the contact piece ( 2 , 12 , 22 , 32 ) comprises a piece of wire having a diameter of 0.1 mm to 1 mm.
26 . A slip ring transmitter comprising a spring contact according to claim 13 , wherein the at least one contact piece ( 2 , 12 , 22 , 32 ) touches against at least one slip ring via the at least one surface.
27 . An electrical motor having a slip ring transmitter according to claim 26 .
28 . A dynamo having a slip ring transmitter according to claim 26 .