Abstract:
In a rhodium electrical contact of a switch, particularly a reed switch, from 0.1 to 10 atomic % of Ag is included in the electrical contact. The electrical contact of the invention has a long life under a various loading conditions from a non-working condition, where an electric current is neither conducted nor broken by the switch, to a working condition, where erosion of the electrical contact is caused by short arcs between members of the electrical contact.
Abstract:
The present invention provides low-current carrying rem-reed switch contacts, preferably for operation under vacuum or under a protective gas. The contacts comprise a medium-hard magnetic material substrate which may contain anomalies on the surface. These are covered by an intermediate layer from 1 to 20 .mu.m of at least one metal selected from the group consisting of titanium, zirconium, hafnium, vanadium, niobium and tantalum. This intermediate layer is then covered with a noble metal layer, for example alloys of gold or silver, and preferably by ruthenium.
Abstract:
A switching device having contacts with a coating consisting of at least two layers in which the inner layer having a thickness of at least 0.5 Mu m consists of metal having a melting point of more than 1800*C and provided with a layer having a thickness of 0.01 - 1 Mu m consisting of a metal having a melting point of less than 500*C and preferably provided with a layer of noble metal having a melting point of more than 1800*C with a thickness of 0.1 - 5 Mu m.
Abstract:
A MAGNETIC MATERIAL OF HIGH RETENIVE CAPACITY CONSISTING ESSENTIALLY OF 40 TO 60 ATOMIC PERCENT PLATINUM WITH GOOD RESULTS, WHEN THE PT PROPORTION IS 45 TO 55 ATOMIC PERCENT BALANCE COBALT (PREFERABLY 50 ATOMIC PERCENT $1 ATOMIC PERCENT PLATINUM AND 50 ATOMIC PERCENT $1 ATOMIC PERCENT COBALT), CONSTITUTING A PLATINUM/ COBALT COMPONENT AND PRESENT AS THE BALANCE OF THE MAGNETIC MATERIAL WITH BETWEEN 4 AND 15 ATOMIC PERCENT IRON ALONE OR WITH UP TO 5 ATOMIC PERCENT NICKEL (PREFERABLY ABOVE 0.1 ATOMIC PERCENT), THE LATTER BEING PRESENT WITH OR WITHOUT COPPER IN AN AMOUNT UP TO 5 ATOMIC PERCENT COPPER (PREFERABLY AT LEAST 0.01 ATOMIC PERCENT) IN THE MAGNETIC ALLOY. THE COBALT PROPORTION IS IN EXCESS OF THE IRON (IN TERMS OF ATOMIC PERCENT).
Abstract:
This invention relates to contacts which have about 0.001 to 96 percent by weight of ferromagnetic or ferrimagnetic permanent magnetic particles embedded in the contacts such that the magnetic particles are distinguishable from the basic contact material. The Curie temperature of the magnetic particles used in the contacts are greater than about 250* C. and the magnetic particles have an average spontaneous magnetic energy product greater than about 5,000 Gauss.Oersted. The magnetic particles having spontaneous magnetic energy can also be incorporated in certain contact configurations to also obtain excellent noise suppression characteristics.