Abstract: A DC motor includes a cylindrical rotor core and a rotor coil wound around the rotor core. The rotor core has shallower slots and deeper slots, circumferentially and alternately disposed in the peripheral surface thereof at angular intervals about the center axis thereof. Each shallower slot includes inner and outer radially aligned sections, while each deeper slot includes inner and outer radially spaced sections and a neck section interposed between the corresponding inner and outer sections. The rotor coil includes U-shaped formed wires, each including inner and outer leg portions and an intermediate portion which interconnects the inner and outer leg portions. The angle between the inner leg portion and the intermediate portion is larger than 90.degree..

Abstract: In a starter system for an internal combustion engine using a planetary reduction gear unit, the internal gear of the planetary reduction gear unit, the center bracket accommodating the internal gear and the pinion cover are joined together so as not to rotate relative to one another by using radial projections provided in the outer circumferential surface of the internal gear which are passed through openings provided in the center bracket and received by associated recesses provided in the pinion cover. The three members are thus prevented from rotating relative to one another with a simple structure which is also easy to assemble. The projection of the internal gear may also be used for securing an annular seal member interposed between an axial end surface of the internal gear and the corresponding shoulder surface of the center bracket.

Abstract: A ventilation structure in a vertically mounted motor is able to avoid clogging from accumulated brush abrasion dust. A ventilation path adapted to provide ventilation between the interior and the exterior of the motor casing is formed from a communication hole defined in a bottom portion of the motor casing, extending between the exterior of the motor casing and a circular hole defined in the bottom portion of the motor casing; a communication groove defined in an annular rib, extending upwardly from the bottom portion of the motor casing to form a bearing seat and encircling the circular hole to bypass the bearing in the bearing seat; and a gap C defined between the annular rib and a cap member covering the bearing and annular rib.

Abstract: A starter system for an internal combustion engine having a casing provided with a mounting circumferential surface adapted to be substantially closely fitted into an associated mounting bore provided in the engine or a transmission housing associated therewith, and a mounting flange extending radially from the casing and provided with a mounting end surface perpendicular to a longitudinal line of the output shaft of the starter system and spaced from the mounting circumferential surface along the longitudinal line. Because of the presence of the distance between the mounting end surface of the mounting flange and the mounting circumferential surface of the starter casing closely fitted into the mounting bore, the reaction force acting on the pinion is prevented from being amplified and transmitted to the mounting surfaces by means of an undesirable lever action.

Abstract: A DC motor is provided with a brush arrangement in which two parts of the brushes are arranged around the peripheral surface of a commutator so that each line across the opposite brushes with respect to the central axis of the commutator forms an angle, thus the space between the positive and negative brushes is sufficient to mount components thereon. Each width of the brushes is determined by the number of conducting segments in contact with the brushes of the same polarity, affording sufficient current to flow in the brushes.

Abstract: A shaft is cold-forged to have a shaped portion at one end of the shaft and a flange portion at a middle of the shaft. A taper portion is provided at a root of the flange portion on the opposite side thereof to the shaped portion. The shaped portion is formed by forward extrusion of a bar material, and the flange portion is formed by upsetting. The taper portion is formed by extruding the root of the flange portion to provide a gently inclined continuous connection between the flange portion and an adjacent portion of the shaft. The apparatus for manufacturing the shaft has at least a first set of dies, at least a second set of dies, and a conveyance system for transferring the shaft between the die sets.

Abstract: A motor armature core coil winding machine comprising a rotating spindle carrying a flier arm at its free end by way of a flier mounting block, a wire guide block rotatably and coaxially supported by the flier mounting block by way of a stub shaft fixedly secured to the wire guide block, an intermediate shaft rotatably supported by the flier arm mounting block in parallel with the spindle, a first endless belt passed around a first pulley fixedly secured to a fixed member coaxially with the spindle and a second pulley fixedly secured to an end of the intermediate shaft, and a second endless belt passed around a third pulley fixedly secured to the other end of the intermediate shaft and a fourth pulley fixedly and coaxially secured to a stub shaft of the wire guide block. Thus, even though the wire guide block is mounted on a free end portion of a spindle which rotates integrally with a flier, the wire block is kept stationary, and can maintain a spaced and fixed relationship with the armature core.

Abstract: Disclosed is a method of forming a shaped configuration by cold forging at an end of a long element, such as the armature shaft of a starter motor for an automobile. The die used in this method has an inner space in which a section for forming the shaped configuration is provided at one end portion thereof, and the diameter of the inner space gradually increases from the shaped configuration forming section to the other end portion of the inner space. A material is placed in the die from the other end portion of the inner space and then, is forced into the die by a punch to be forged into the shape corresponding to that of the inner space of the die. After the forging, the shaped material is pushed out of the die by a knock-out pin which is inserted into the die in the opposite direction to the direction in which the material is forced.

Abstract: An electromagnetic relay wherein a movable contact is closed or opened against a stationary contact through excitation or demagnetization of an electromagnetic coil. A base made of synthetic resin and having a flat plate shape is provided with a space extending vertically. A stationary contact member is formed separately of a terminal member, the stationary contact member and the terminal member are provided on the side of a top surface and on the side of an undersurface of a base, respectively, and these members are connected to each other through a hole formed in the base. A recess for positioning the stationary contact member is formed on the top surface of the base. The movable contact is placed on a shorter side of the electromagnetic coil.

Abstract: There is disclosed a rotation device, such as an overrunning clutch and a ball bearing. The rotation device includes a cylindrical inner member; a hollow cylindrical outer member coaxially and rotatably disposed on the inner member; an annular extension integrally formed with the outer periphery of the rear end face of the outer member; and an annuloar sealing plate for aligning the axes of the outer and inner members with each other. An inner space for receiving a lubricating agent is defined by the inner member and the inner face of the outer member. The inner space opens to the rear end face of the outer member. The annular extension has an inwardly opening annular groove circumferentially formed therein. The sealing plate rotatably fits around the inner member and fixedly fixed in the annular extension in such a manner that the opening of the inner space is closed by the sealing plate.

Abstract: In a method of mounting and demounting at least two, upper and lower dies to and from a press molding machine, a workpiece is inserted into a press position between the upper and lower dies. The workpiece is then pressed or stamped at the press position by the upper and lower dies. The upper and lower dies are maintained at the press position to leave the workpiece after having been pressed or stamped, at the press position between the upper and lower dies. The upper and lower dies are mounted and demounted to and from the press molding machine, with the workpiece maintained at the press position between the upper and lower dies.

Abstract: A joint device wherein spherical shaft is pressed into and coupled with a spherical bearing member made of resin through an opening formed in a portion of a spherical bearing portion a generally cylindrical skirt portion is formed at the opening of the spherical bearing member such that the minimum inside diameter of the skirt portion is smaller than the inside diameter of the opening, and a flex starting portion is formed at a position close to the skirt portion of the spherical bearing portion. The inner peripheral surface of the skirt portion is tapered inwardly in a direction away from the spherical bearing portion. An inwardly raised portion is provided at a portion of the inner peripheral surface of the skirt portion.

Abstract: A drain cover for covering a pair of draining ports which are formed in the bottom of a cylindrical horizontal yoke of a dynamic electric machine at a distance from each other in the circumferential direction of the yoke.

Abstract: An oscillation generating apparatus which has an oscillating shaft supported rotatable about an axis thereof, at least a cam follower attached eccentric to the oscillating shaft, at least a pair of drive shafts disposed parallel to the oscillating shaft and adapted to be connected to drive means to be rotated thereby; and at least a pair of cams attached to the pair of drive shafts for rotational movement therewith and kept in sliding contact with the cam follower, shape and location of the cams being so determined that at least one of the cams gives thrust force to the cam follower at any rotational angle of the oscillating shaft as the drive shafts are bieng rotated, whereby rotational movement of the drive shafts being converted to a back-and-forth rotational movement of the oscillating shaft. With the apparatus, a high rotational speed of the drive shaft can be correctly converted to a back-and-forth rotational movement of the oscillating shaft.

Abstract: A dc motor including a first set of pigtails passing out of the motor case through a grommet which is fitted in an opening formed in the motor case. This motor has a pigtail holder which fixes the first set of pigtails to the grommet. The pigtail holder includes first and second portions. The first portion is stationarily engaged with the grommet, while the second portion is fixedly connected to those portions of the first set of pigtails inside the motor case. With this fixed pigtail arrangement, movement of the first set of pigtails is restrained, and therefore, effects of vibration on the first set of pigtails are reduced when the motor is subjected to vibration.

Abstract: A vehicle cruise control system, comprising a control circuit for producing a control signal for maintaining a speed of a vehicle at a fixed level according to a difference between an actual vehicle speed and a target vehicle speed, and a drive circuit for producing a drive signal for selectively driving an actuator in a direction either to accelerate the vehicle or to decelerate the vehicle according to the control signal from the control circuit. The drive circuit is provided with a transistor bridge circuit comprising four drive transistors for producing the drive signal. The control circuit is provided with a detection means for detecting an abnormal state of the system and an inhibiting means which brings at least one of the drive transistors into an non-conductive state when any abnormal state is detected by the detecting means. The control circuit may be programmed to perform a certain diagnostic procedure for testing the soundness of the drive transistors.

Abstract: A stator coil of a generator for vehicles is provided with a stator coil construction and method for winding the stator coil around the core. The coil is wound around the stator core so that a portion of the stator coil projects from one or both sides of the stator core in the axial (longitudinal) direction of the core. The projecting portion of the stator coil closely surrounds the rotor core and is composed of inner and outer wire batches between which are formed slits which permit cooling air to pass therethrough and cool the coil more efficiently. The cooling air is generated by a fan which is attached to the rotor core facing the inner surface of the projecting portion of the stator coil.

Abstract: A construction of a starter motor for taking off the power to the outside, is operable wherein the power from the starter motor can be taken off as the externally operating section other than the power of an engine. The starter motor includes a first reduction mechanism having a motor shaft as an input shaft. The motor shaft transmits power to a coaxial output shaft. A pinion gear is provided on the engine side of the first output shaft in association with a ring gear. A second reduction mechanism utilizes the first output shaft as an input shaft, to transmit power to a second output shaft. The second output shaft is rotatably coupled onto the first output shaft and coaxial therwith, to permit the power to be taken off to the outside near the pinion gear. The first and second reduction mechanisms each include a sun gear provided on the input shaft, an internal gear and a plurality of planetary gears provided between the sun gear and the internal gear and being mesh with the both gears.

Abstract: A unidirectional rotary clutch in a starter motor has a clutch inner interlocking with a motor, a clutch outer interlocking with a pinion gear and an elastic member-fitted clutch roller accommodated in a roller groove chamber. The clutch functions to propagate power driving forward rotation of the motor, but to cut off the propagation of power in the case of reverse rotation. The chamber is filled with grease mainly composed of hydrocarbon fats and oils to which 5.0 to 15.0% by weight of a fluorocarbon resinous agent is added.

Abstract: A vehicle cruise control system having an electric actuator for acting upon a throttle valve of a vehicle, a clutch for disconnecting the actuator from the throttle valve, a spring or the like for returning the output end of the clutch to a neutral state and a limit switch for detecting the limit of the motion of the output end of the clutch and discontinuing the supply of electric current to the actuator upon detection of the limit. Since the detection of the lower limit of the stroke of the actuator for decelerating the vehicle is necessary for preventing unnecessary supply of electric current to the actuator and overloading of the actuator, the closed state of the limit switch is tested by supplying an electric current to the actuator so as to decelerate the vehicle prior to starting the normal operation of the vehicle cruise control and determining if the electric current is indeed conducted through the actuator or not.