An electric contact pair includes a first electric contact, and a second electric contact to be brought into electrical contact with the first electric contact. The first electric contact includes a first plating film made of Ag or a Ag alloy on its outermost surface, and the second electric contact includes a second plating film made of Rh or a Rh alloy on its outermost surface. The first plating film maybe layered on a first conductive base material, the second plating film maybe layered on a second conductive base material, and the first conductive base material and the second conductive base material are made of copper or a copper alloy, or aluminum or an aluminum alloy. A connector terminal pair includes a first terminal including the first electric contact, and a second terminal including the second electric contact.

An electric contact pair includes a first electric contact, and a second electric contact to be brought into electrical contact with the first electric contact. The first electric contact includes a first plating film made of Ag or a Ag alloy on its outermost surface, and the second electric contact includes a second plating film made of Rh or a Rh alloy on its outermost surface. The first plating film maybe layered on a first conductive base material, the second plating film maybe layered on a second conductive base material, and the first conductive base material and the second conductive base material are made of copper or a copper alloy, or aluminum or an aluminum alloy. A connector terminal pair includes a first terminal including the first electric contact, and a second terminal including the second electric contact.

A surface layer including a base material made of a conductor and dispersed particles dispersed in the base material is formed on a surface of a fixed contact, and the dispersed particles each include a base particle that is metal oxide and a coating layer formed on an outer surface of the base particle.

Disclosed is a microswitch that allows the setting of the microswitch to be detected. The microswitch includes a conducting element movable along a surface that includes at least one conducting track that is contacted by the movable conducting element. Actuating the microswitch moves the movable conducting element along the surface resulting in electrically connecting or disconnecting two electrical tracks and causing electrical switching. In addition, the contact surfaces electrically connected by the conducting element may have different electrically conductive regions such that moving the connected surfaces changes the electrical resistances. Different switch positions can be determined by measuring resistance.

Disclosed is a microswitch that allows the setting of the microswitch to be detected. The microswitch includes a conducting element movable along a surface that includes at least one conducting track that is contacted by the movable conducting element. Actuating the microswitch moves the movable conducting element along the surface resulting in electrically connecting or disconnecting two electrical tracks and causing electrical switching. In addition, the contact surfaces electrically connected by the conducting element may have different electrically conductive regions such that moving the connected surfaces changes the electrical resistances. Different switch positions can be determined by measuring resistance.

Various embodiments disclosed relate to an alloy. The alloy includes elemental silver. The alloy further includes a metal oxide phase in the elemental silver. The metal oxide phase includes a wetting agent layer that coats the metal oxide phase.

Various embodiments disclosed relate to an alloy. The alloy includes elemental silver. The alloy further includes a metal oxide phase in the elemental silver. The metal oxide phase includes a wetting agent layer that coats the metal oxide phase.

The present invention relates to an arc eliminator, and more particularly, to an arc eliminator with an earth contact. An arc eliminator comprises: a housing; an extinguisher installed on the housing; and an earth contact that is installed on the housing and protrudes out from the housing in such a way as to be connected to the ground bus bar provided inside a distribution board when the extinguisher is moved to a first position where the extinguisher is connected to a fixed bus bar provided inside the distribution board, and to be disconnected from the ground bus bar when the extinguisher is moved to a second position where the extinguisher is disconnected from the fixed bus bar.

The invention disclosed is a knife blade switch 2 having copper jaws 10 and a copper blade 4 with a steel end-plate 6 fastened to the free end of the blade, the steel end-plate having a higher resistivity than the resistivity of the copper blade and copper jaws. As the copper blade is withdrawn from the copper jaws, the steel end-plate of the blade remains in contact with a higher resistivity steel jaw-spring mounted on and electrically connected to the copper jaws. The connection of the steel end-plate 6 of the blade with the steel jaw-spring 12 imposes a greater resistance path for the current flowing through the switch than through the copper blade 4 and copper jaws 10, so that an arc formed at the plate and jaw-spring has a diminished current, over what would otherwise occur with a copper blade and jaws, when the contact separation occurs.

The invention disclosed is a knife blade switch 2 having copper jaws 10 and a copper blade 4 with a steel end-plate 6 fastened to the free end of the blade, the steel end-plate having a higher resistivity than the resistivity of the copper blade and copper jaws. As the copper blade is withdrawn from the copper jaws, the steel end-plate of the blade remains in contact with a higher resistivity steel jaw-spring mounted on and electrically connected to the copper jaws. The connection of the steel end-plate 6 of the blade with the steel jaw-spring 12 imposes a greater resistance path for the current flowing through the switch than through the copper blade 4 and copper jaws 10, so that an arc formed at the plate and jaw-spring has a diminished current, over what would otherwise occur with a copper blade and jaws, when the contact separation occurs.