Abstract: Disclosed is an engine igniting coil device which comprises a plurality of coil units arranged in a case and unitarily potted therein with thermosetting resin, and is characterized by that a core portion of each coil unit is covered with a core cover, a coil base is mounted in the case to enclose portions of the core covers extruding from the coil case and inner space of the coil case is divided by partitions to separately accommodate coil units, thereby a required amount of resin for potting is reduced and thermal crack resistance of the resin potions is increased.

Abstract: A hydraulic actuating apparatus includes a cylindrical case having a fitting at one end connectable to a source of pressurized oil, the fitting having a passage for communication with the pressurized oil, a slider slidably carried by the cylindrical case, the slider being slidable in response to the oil pressure, a first spring device for biasing the slider in a predetermined direction to resist the force on the slider applied by the oil pressure, a slidable contact device carried by the slider, an oil pressure sensor which includes a resistor and a ground conductor, the slidable contact device being slidably engaged with the resistor, the resistor being fixed with respect to the slidable contact device, and a second spring device for biasing the slider in the predetermined direction. The second spring device is connected to the slider, with the second spring device having a smaller spring constant than the first spring device.

Abstract: A hydraulic actuating apparatus for sensing hydraulic pressure and producing an output signal representative of the sensed hydraulic pressure includes a base portion, a case, and a variable resistor unit. A slider is movably connected to the variable resistor unit, and the variable resistor unit is connected to the base, the slider being movable relative to the variable resistor unit by an amount proportional to the hydraulic pressure applied to the slider. The variable resistor unit has a resistance which changes in response to movement of the slider. A resilient member is provided which is resiliently deformable by movement of the slider relative to the variable resistor unit, the resilient means exerting a restoring force on the slider opposing the movement of the slider caused by the hydraulic pressure. An adjusting mechanism is provided for setting an initial resistance value of the variable resistor unit, the variable resistor unit having a portion which is in contact with the adjusting mechanism.

Abstract: In a reversing switch comprising a substantially V-shaped swinging contact plate provided with a normally open movable contact and a normally closed movable contact, a pair of fixed contacts provided in opposed relationship to the normally open movable contact and the normally closed movable contact, an intermediate supporting member for supporting a normally open contact side of a central bent portion of the swinging contact plate, and a knob adapted to be swung and slid on the swinging contact plate; the improvement is characterized in that the swinging contact plate is formed of an elastic material, and that the knob is provided at its end portion with a pressing member adapted to elastically deform the swinging contact plate. With this arrangement, the swinging contact plate is elastically deformed by the pressing member in association with the swinging motion of the knob, thereby wiping off a bad conductor present between the movable contact and the fixed contact.