Abstract: The power source apparatus is provided with a shunt resistor connected in series with batteries, and a current computation circuit that detects the voltage induced by current flow through the shunt resistor to compute battery current. The shunt resistor is provided with a pair of current flow terminals at two separated points on a metal plate connected in series with the batteries via connecting leads, and a pair of voltage detection terminals on a side of the metal plate between the pair of current flow terminals. Further, the shunt resistor has interval adjustment structures to adjust the distance (L) between attachment points where the connecting leads attach to the pair of current flow terminals. The distance (L) between lead attachment points is adjusted with the interval adjustment structures to finely adjust the voltage induced at the voltage detection terminals due to current flow between the two attachment points.

Abstract: A variable chip resistor (1) of the present invention includes a resistor element (2) made of a metal plate which is in the form of a chip and has a predetermined specific resistance. Terminal electrodes (3, 4) for soldering are provided at both ends of the resistor element (2), and at least one adjustment hole (9) is formed in the resistor element (2) at a portion between the terminal electrodes (3, 4). An adjustment rod (10) is inserted into the adjustment hole (9) in close contact with the inner surface of the adjustment hole. The adjustment rod (10) is made of an electroconductive material, and its insertion depth is adjustable in the axial direction of the adjustment hole (9).

Abstract: A surface mount variable resistor meets the needs of user for front and rear terminals of an insulating substrate. The surface mount variable resistor includes an insulating substrate 1 with a variable resistor pattern 3 and electrode patterns 5 formed thereon, resistor termination terminal fittings 7 connected to the electrode patterns 5, an electrically conductive slider 15 including a sliding contact 15c that slides on the variable resistor pattern 3, and an intermediate terminal 17 that includes a rear intermediate terminal fitting portion 17a and is electrically connected to the electrically conductive slider 15. The intermediate terminal 17 includes an extended conductor portion 17c and the rear intermediate terminal fitting portion 17a integrally formed with the extended conductor portion 17c. A front intermediate terminal fitting portion 17d located between the resistor termination terminal fittings 7 is integrally formed with the extended conductor portion 17c.

Abstract: A variable electric resistor device comprises a block of electrical insulating material. An elongated member of current resistive metal is removably positioned in the insulating material. A pair of electrically conductive terminal leads are each electrically connected to a corresponding end of the current resistive member. An elongated ancillary member of electrically conductive material is embedded in the insulating material in spaced parallel relation with the current resistive member. A plurality of spaced transverse internally threaded bores are formed through the ancillary member. A plurality of spaced bores are formed through the block extending from both sides of the internally threaded bores from the current resistive member to a surface of the block.