A disconnecting device having a plurality of modules for disconnecting an electrical supply line of an intensity higher than 1000 A. Each module includes a tight contact casing (10) having at least one fixed-contact conductive element (12, 14) in contact with a mobile-contact conductive element (20, 26), and a mechanism for interrupting the contact between the fixed-contact element and the mobile-contact element so as to disconnect the supply line; metal connection bars (60, 62, and 64, 66) for connecting to a current input and to a current output; and intermediate conductive elements such as blades (68, 70, et 72, 74) connected to the connection bars and to the casing. At least one of the mobile-contact elements includes a silver pellet fixed to the surface of the element, allowing the contact resistance between the mobile-contact element and the fixed-contact element to be reduced by half.

A disconnecting device having a plurality of modules for disconnecting an electrical supply line of an intensity higher than 1000 A. Each module includes a tight contact casing (10) having at least one fixed-contact conductive element (12, 14) in contact with a mobile-contact conductive element (20, 26), and a mechanism for interrupting the contact between the fixed-contact element and the mobile-contact element so as to disconnect the supply line; metal connection bars (60, 62, and 64, 66) for connecting to a current input and to a current output; and intermediate conductive elements such as blades (68, 70, et 72, 74) connected to the connection bars and to the casing. At least one of the mobile-contact elements includes a silver pellet fixed to the surface of the element, allowing the contact resistance between the mobile-contact element and the fixed-contact element to be reduced by half.

A composition for coating an electrical contact point includes a silver powder and a fluorinated resin. The silver powder is dispersed in the fluorinated resin, and a weight ratio of the silver powder for the fluorinated resin is in a range from 0.4 to 1.

The present invention is a rivet contact including a head portion and a foot portion having a smaller width than the head portion, wherein the head portion contains a contact material layer having at least a top containing an Ag-based contact material; the rest of the head portion and the foot portion contain a base material containing Cu or a Cu alloy; and a barrier layer including an Ag alloy is provided at a junction interface between the contact material and the base material. Here, an Ag alloy obtained in such a manner that one or more base metal elements of Sn, In, Cu, Ni, Fe, Co, W, Mo, Zn, Cd, Te, and Bi are added to Ag by 0.03 to 20 mass % is preferably used as the Ag alloy constituting the barrier layer.

The present invention is a rivet contact including a head portion and a foot portion having a smaller width than the head portion, wherein the head portion contains a contact material layer having at least a top containing an Ag-based contact material; the rest of the head portion and the foot portion contain a base material containing Cu or a Cu alloy; and a barrier layer including an Ag alloy is provided at a junction interface between the contact material and the base material. Here, an Ag alloy obtained in such a manner that one or more base metal elements of Sn, In, Cu, Ni, Fe, Co, W, Mo, Zn, Cd, Te, and Bi are added to Ag by 0.03 to 20 mass % is preferably used as the Ag alloy constituting the barrier layer.

A gas burner arrangement for a hotplate includes at least two gas burners, each gas burner having operably connected thereto a gas valve for regulating a combustion gas flow to the gas burners, and a thermoelement for monitoring a flame of the gas burners. The thermoelement is coupled to the gas valve by an electrical circuit, such that when the flame of the associated gas burner is extinguished, the combustion gas flow to the gas burner is interrupted with the aid of the gas valve. Each electrical circuit includes a mechanically actuatable switch configured to couple or decouple the electrical circuit between the associated thermoelement and the associated gas valve. The mechanically actuatable switch includes a contact element having a noble metal. A shared actuation element controls the mechanically actuatable switches of the electric circuits.

There is provided a silver-plated product which has a good bendability and which can restrain the rise of the contact resistance thereof even if it is used in a high-temperature environment, and a method for producing the same. In a silver-plated product wherein a surface layer of silver is formed on the surface of a base material of copper or a copper alloy, or on the surface of an underlying layer of copper or a copper alloy formed on the base material, the percentage of an X-ray diffraction intensity on {200} plane of the surface layer with respect to the sum of X-ray diffraction intensities on {111}, {200}, {220} and {311} planes of the surface layer is 40% or more.

There is provided a silver-plated product which has a good bendability and which can restrain the rise of the contact resistance thereof even if it is used in a high-temperature environment, and a method for producing the same. In a silver-plated product wherein a surface layer of silver is formed on the surface of a base material of copper or a copper alloy, or on the surface of an underlying layer of copper or a copper alloy formed on the base material, the percentage of an X-ray diffraction intensity on {200} plane of the surface layer with respect to the sum of X-ray diffraction intensities on {111}, {200}, {220} and {311} planes of the surface layer is 40% or more.

An electrical contact tip for switching applications. The contact tip includes a body having a first layer and a second layer. The first layer arranged on the second layer and adapted to come in contact with a corresponding contact tip during switching operations. The first and second layers consist of Ag-composites of one or more elements, compounds or alloys, where the hardness of the first layer is lower than the hardness of the second layer.

A method for manufacturing a fluorine-based resin coating powder includes a silver powder preparing step of preparing a silver powder having a predetermined grain size, a silver powder solution mixing step of adding the silver powder to an ethanol solution, followed by mixing, a PH adjustment solution preparing step of preparing a solution having a pH that is adjusted to a set PH, a fluorine silane preparing step of preparing fluorine silane, and a fluorine-based resin coating silver powder manufacturing step of manufacturing a fluorine-based resin coating silver powder coated with the fluorine-based resin at a set thickness by adding the silver powder mixed with the ethanol solution in the silver powder solution mixing step and the fluorine silane prepared in the fluorine silane preparing step to the solution having the pH that is adjusted to the PH set in the PH adjustment solution preparing step, followed by mixing.