A discharge circuit discharges a smoothing capacitor that smooths a DC voltage through a plurality of resistive elements mounted on a substrate. The discharge circuit includes a series connection of at least three resistive elements spaced apart from each other in a first direction and connected in series by wires. The resistive element positioned more centrally in the first direction, included in the series connection, has a lower resistance value. The resistive elements adjacent to each other in the first direction and included in the series connection are displaced from each other in a second direction perpendicular to the first direction.

A metal resistance strain gage with a high gage factor is provided. The electrical resistance strain gage includes a strain sensitive metallic element and has a chemical composition on a weight basis of approximately 63% to 84% Ni and approximately 16% to 37% Fe and a gage factor greater than 5.

A metal resistance strain gage with a high gage factor is provided. The electrical resistance strain gage includes a strain sensitive metallic element and has a chemical composition on a weight basis of approximately 63% to 84% Ni and approximately 16% to 37% Fe and a gage factor greater than 5.

A spark plug 1 includes a cylindrical housing, a cylindrical insulator, a center electrode, a terminal bracket, a ground electrode, and a resistor. The insulator is held on the inside of the housing. The center electrode 4 is held on the inside of the insulator, with a tip end being projected therefrom. The terminal bracket is held on the inside of the insulator, with a base end part and being projected therefrom. The ground electrode forms a spark discharge gap G between itself and the center electrode. The resistor contains carbon and is disposed on the inside of the insulator so as to be located between the center electrode 4 and the terminal bracket. In an axial direction X of the spark plug, the resistor has a higher carbon content in a first region positioned on a tip side, compared to a second region positioned on a base end side.

A spark plug 1 includes a cylindrical housing, a cylindrical insulator, a center electrode, a terminal bracket, a ground electrode, and a resistor. The insulator is held on the inside of the housing. The center electrode 4 is held on the inside of the insulator, with a tip end being projected therefrom. The terminal bracket is held on the inside of the insulator, with a base end part and being projected therefrom. The ground electrode forms a spark discharge gap G between itself and the center electrode. The resistor contains carbon and is disposed on the inside of the insulator so as to be located between the center electrode 4 and the terminal bracket. In an axial direction X of the spark plug, the resistor has a higher carbon content in a first region positioned on a tip side, compared to a second region positioned on a base end side.

A shunt resistor, at least a part of which has a resistive element with pre-set resistivity, is configured to bridge between two electrodes and detect a current value of a current flowing between the electrodes by detecting a voltage drop in the resistive element. The shunt resistor includes two connecting parts affixed to the electrodes via a conductive adhesive, respectively, and the connecting parts electrically connected to the affixed electrodes, a bridging part bridging between the connecting parts by being extended from one of the connecting parts to the other one of the connecting parts, and two bonding wires used to detect a voltage drop in the resistive element. The bonding wires are bonded to the bridging part.

In a metal plate resistor, the bonded surface between the resistance body and the electrode can be prevented from peeling off. The metal plate resistor comprises a resistance body; an electrode consisting of metal material having a higher conductivity than the resistance body, and the electrode bonded with the resistance body; a recessed portion formed in an end face of the electrode on a side bonded with the resistance body; and a fixation hole formed in the electrode for inserting a bolt; wherein an end portion of the resistance body is fitted into the recessed portion in the electrode. The recessed portion is provided with wall portions on both sides in a width direction of the resistance body, and in a direction substantially perpendicular to a penetration direction of the fixation hole. The recessed portion is opened to an end face and a first surface of the electrode.

A shunt resistor, at least a part of which has a resistive element with pre-set resistivity, is configured to bridge between two electrodes and detect a current value of a current flowing between the electrodes by detecting a voltage drop in the resistive element. The shunt resistor includes two connecting parts affixed to the electrodes via a conductive adhesive, respectively, and the connecting parts electrically connected to the affixed electrodes, a bridging part bridging between the connecting parts by being extended from one of the connecting parts to the other one of the connecting parts, and two bonding wires used to detect a voltage drop in the resistive element. The two bonding wires are extracted parallel to an extension direction of the bridging part to a same direction.

A shunt resistor, at least a part of which has a resistive element with pre-set resistivity, is configured to bridge between two electrodes and detect a current value of a current flowing between the electrodes by detecting a voltage drop in the resistive element. The shunt resistor includes two connecting parts affixed to the electrodes via a conductive adhesive, respectively, and the connecting parts electrically connected to the affixed electrodes, a bridging part bridging between the connecting parts by being extended from one of the connecting parts to the other one of the connecting parts, and two bonding wires used to detect a voltage drop in the resistive element. The two bonding wires are extracted parallel to an extension direction of the bridging part to a same direction.

A shunt resistance type current sensor includes a bus bar, a circuit board disposed to oppose the bus bar, a shunt resistance part in the bus bar, connection terminals which electrically connect the bus bar and the circuit board, and a voltage detector which is mounted on the circuit board and detects a voltage applied to the bus bar to detect a magnitude of current to be measured flowing through the bus bar. The connection terminal is formed integrally with the bus bar as an extending piece extended from an edge part of the bus bar, an area of the connection terminal reduced in its plate thickness than that of the bus bar is set in a range from a tip side thereof, and the tip side of the connection terminal penetrates the circuit board and connects with the circuit board.