Contact arrangement for vacuum switches with axial magnetic fields
First Claim
1. A contract arrangement for vacuum switches with axial magnetic fields comprising:
- a first and second contact piece, each contact piece having a contact carrier and a contact body soldered to said contact carrier, each body having a contacting surface and a back surface, said contacting body being made of a base material and having radial areas of lower conductivity than said base material for the reduction of eddy currents, said radial areas extending from said back surface toward said contacting surface across only a portion of said contact body.
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Accused Products
Abstract
Contact pieces for vacuum switches with axial magnetic field are designed e.g. as cup contacts with slotting in the same direction which support a diskshaped contact body and have means for the suppression of eddy currents. According to the invention, the contact bodies (10, 20, 30, 40, 50) have, at least on their backside, radial areas (15, 25, 35, 45, 55) of markedly lower electrical conductivity than the base material. Such radial areas may be, grooves (15 to 18) on the backside (12) of the contact body (10), diffusion zones (25, 35) of additives reducing the electrical conductivity of the base material, or combinations of the two. If the contact bodies (40,50) are made by powder metallurgical methods, it is also possible to provide the radial areas during production as fillings (45) or as molded parts (55) of a material of lower electrical conductivity than that of the base material.
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Citations
15 Claims
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1. A contract arrangement for vacuum switches with axial magnetic fields comprising:
a first and second contact piece, each contact piece having a contact carrier and a contact body soldered to said contact carrier, each body having a contacting surface and a back surface, said contacting body being made of a base material and having radial areas of lower conductivity than said base material for the reduction of eddy currents, said radial areas extending from said back surface toward said contacting surface across only a portion of said contact body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
Specification