Abstract: A variable resistor including terminal leads punched out of a metal plate the end portions of which are arranged to be positioned accurately onto corresponding collector or conductor elements disposed on a base respectively by setting the metal plate at a fixed position, filler elements filling a gap extending between the collector element and the conductor elements and a gap extending between the conductor elements and which prevent an outflow of synthetic resin into the center of a housing during the process of molding the housing and a parallel gap electrode provided with a pair of parallel electrodes which are provided on an unplated surface of the end portions of the lead terminals during the process of welding the terminal leads onto the corresponding collector and the conductive elements respectively.

Abstract: A potentiometer has a case, a housing, a base and a rotor rotatably arranged in the chamber of housing. The housing is provided with a pair of projections on both side walls thereof and two pair of corner projections at four corners thereof respectively while the case has a pair of bent long legs in which holes are defined to receive the side wall projections of the housing and a pair of bent short walls are arranged to cover the top of the housing. The case may be pushed down upon the housing with the pair of bent long legs thereof being slid down into vertical grooves arranged between the corner projections of the housing until the side wall projections of the housing are slidingly snapped into the holes of the case and thus, the case and the housing may be assembled in one operation.

Abstract: A magnetic recording apparatus having a plurality of magnetic heads (111-118) by which data is written on and read from a magnetic medium (121-123) has a timing correction unit (3) that controls a suitable timing according to a predetermined characteristic of a selected magnetic head or disk apparatus and the density of logical ONE states in the data so that the data will be written on the magnetic medium under the timing controlled by the timing correction unit. Timing correction may also be provided according to whether the head is an inner or an outer head.