Abstract: A sealing structure for a ball joint of a wiper link mechanism is provided with a boot. A boot-engaging part is formed on an outer periphery adjacent an opening of said ball retainer and a retainer-engaging part is formed at the end of the boot which includes a flexible part. The boot can seal the opening of the ball retainer in the limited space between the plate-shaped link arm and the plate-shaped link connecting rod in the state in which the ball pin is coupled to the ball retainer. It is able to prevent water, mud or the like from entering into the spherical hollow of the ball retainer even if the link arm and the link connected rod are inclined to each other.

Abstract: A windshield wiper motor having a motor casing and a reduction gear casing is provided with a crooked air passage between the casings which is provided with a breather hole at a position that neither coincides nor overlaps with a projection of the respective openings of the passage into the gear casing and motor casing, so that it is possible to perform a breathing action even if lubricating oil penetrates into the air passage through the opening since the oil will be prevented from entering and clogging the breather hole.

Abstract: An automatic opening and closing device for a window which has a forwardly and reversely rotatable motor for opening and closing the widow, switching means which instructs said motor to rotate, pulse-detecting means which detects a pulse generated along with a rotation of said motor, counting means which counts a pulse number detected by said pulse-detecting means and rotation-controlling means which performs rotation-control to said motor on basis of a count number counted by said counting means and a predetermined count number is dislosed, by which it is possible to stop the opening or closing action of the window at a halfway, or possible to convert the action of the window in the reverse direction.

Abstract: An automatic car-speed controller is disclosed, which is provided with an actuator having a solenoid clutch comprising a sector wheel rotatable around a shaft and an output pulley rotatable independently from the sector wheel around the shaft coaxially. The sector wheel consists of a gear portion, a solenoid, and a sector arm alienating the solenoid from a rotational center thereof. The output pulley consists of a pulley portion attached with a throttle cable nearly to the rotational center, a magnetic body attracted by the solenoid of the sector wheel, and an arm connecting the magnetic body with the pulley portion.

Abstract: A driving device for a door lock-actuator includes a door locking switch, a control circuit, a drive device and a counter. This device is free from the malfunctions and the restrictions of detecting limits which are problems in conventional-mechanical one-way switches, and can detect the locking and unlocking action certainly. In this device, the control circuit detects the locking and unlocking direction, and the drive device can drive the door lock-actuator of all the doors adjacent a passenger's seat according to the output signal from the control circuit.

Abstract: A motor control circuit is disclosed, which comprises an operation switch to issue the forward rotation or reverse rotation signal, driving means to operate the motor to the forward or reverse direction in response to the forward rotation or reverse rotation signal from said operation switch, rotation detecting means to detect the rotating condition of the motor, and stopping means to cut off the power to said motor when, during the operation of the operation switch, the rotation detecting means continues to detect, for a certain period of time, that the rotation of the motor has been stopped.

Abstract: A wiper linkage of the cross arm type is provided with a driving rod, an oscillation arm, two cross arms interlinking the driving rod and the oscillation arm, and restrictive alignment-free couplings connecting the cross arms between the driving rod and oscillation arm. In this linkage, it is possible to connect the coupling parts easily and to absorb dimensional errors in the coupling parts, and to also make the coupling waterproof by a sealing member. Furthermore, a smooth and noiseless action of the linkage can be obtained.

Abstract: A fuel supply system including a fuel tank, a feed conduit through which fuel is pumped from the fuel tank, and a return conduit through which excess fuel is returned to the fuel tank. The fuel tank has first and second sumps. The system comprises an ejector pump having a pressure chamber opening through a throat into the first sump. The pressure chamber is connected through a communication conduit to the second sump. The ejector pump includes a fuel nozzle having an inlet port connected to the return conduit and a discharge end opening into the pressure chamber for discharging a jet of fuel into the pressure chamber to create a negative pressure in the pressure chamber so as to suck fuel through the communication conduit from the second sump. In one aspect of the invention, a relief valve is provided which is responsive to a back pressure produced in the fuel nozzle for relieving the back pressure to the first sump when the back pressure exceeds a predetermined value.

Abstract: A system and method for automatically controlling a vehicle speed to a desired cruising speed in which a transfer point at which control of the vehicle speed is transferred from that carried out by returning the vehicle speed to the cruising speed set through an operation of a set switch at a controllable acceleration in the vehicle speed to that carried out by controlling the vehicle speed so that the vehicle speed coincides with the set cruising speed is determined on the basis of a sum of an acceleration value multiplied by a constant and speed difference from the actual vehicle speed to set cruising speed. Consequently, an overshooting of the vehicle speed does not occur when the vehicle speed is returned toward and finally settles at the set cruising speed.

Abstract: A system and method for automatically controlling a vehicle speed to a desired cruising speed in which after a vehicular engine is set in an acceleration state for the vehicle through an actuator under an acceleration control of the vehicle speed in response to a command operation of an acceleration switch, the vehicular engine is set so that the vehicle speed is reduced and arrives at a set cruising speed at a time of a reset of the command operation of the acceleration switch. At this time, in the vehicle speed controlling system and method, a duration in which the vehicle speed is one abruptly reduced is calculated on the basis of a control duration for which the vehicle speed is in the acceleration state under the acceleration control so that the vehicle speed is smoothly reduced and reaches the set cruising speed.

Abstract: A wiper motor assembly including an electric motor and a speed reduction gear which are combined as a unit. A clutch assembly is incorporated with the speed reduction gear to cut off a gearing connection between a driving shaft of the motor and an output shaft of the speed reduction gear when the output encounters a certain level of resistance to rotation.

Abstract: A rotary actuator has a first rotor rotatable around a first axis and having a plurality of first projections circumferentially spaced and axially projecting from one end surface thereof, a second rotor rotatable around a second axis which is eccentric to the first axis and having at least a second projection circumferentially spaced and axially projecting from one end surface thereof, a rotating mechanism connected to the second rotor to rotate the second rotor, the first and second rotors being arranged such that their end surfaces face each other so that the second projection may engage with either one of the first projections to rotate the first rotor through a predetermined angle when the second rotor is rotated.

Abstract: A reduction gearing device for automobile accessory motor comprises first and second worms coaxially formed on a worm shaft in different thread directions, a pair of first and second intermediate gears each composed of two gear members, with one gear of each pair being engaged with a respective worm, and a common output gear engaged with the other gear member of each of the intermediate gears. The engagement of one intermediate gear with the first worm is in phase with the engagement of the other intermediate gear with the second worm while the engagement of one intermediate gear with the common output gear is in phase with the engagement of the other intermediate gear with the common output gear.

Abstract: A link coupling device comprising a ball pin and a ball retainer is disclosed, wherein the ball pin is provided with a movement-restricting projection portion and the ball retainer is provided with a movement-restricting recess portion capable of engaging with the movement-restricting projection portion when the spherical part of the ball pin is press-fitted into the press fitting part of the ball retainer.

Abstract: A rotary actuator comprising a first rotor rotatable around a first axis and an axial end surface with a plurality of circumferentially spaced and axially projecting first projections, attending therefrom a second rotor rotatable around a second axis which is not coincident with the first axis, the second rotor having an axial end surface with a plurality of circumferentially spaced and axially projecting second projections extending therefrom, and a rotating mechanism being connected to the second rotor to rotate it around the second axis. The second projections project in a direction opposite to that of the first projections to cooperate therewith such that either one of the second projections engages with either one of the first projections to rotate the first rotor through a predetermined angle.

Abstract: A rotary actuator has a Geneva wheel having in one end surface thereof an annular central recess and a plurality of angularly equally spaced and radially extending grooves connected to the central recess, a driving rotor connected to a rotary driving source and rotatable around an axis eccentric with respect to the Geneva wheel, a driving pin mounted on the driving rotor and engaging selectively with one of the grooves and the central recess in the Geneva wheel, an arcuate wall defined on a part of the circumferential wall of the driving rotor, and a plurality of correspondingly shaped arcuate walls formed on the Geneva wheel and cooperating with the arcuate wall of the driving rotor when the driving pin of the driving rotor engages with the central recess thereby preventing the rotation of the Geneva wheel with respect to the driving rotor.

Abstract: A hydraulic damper of adjustable damping force type includes a piston working in a cylinder and partitioning the interior of the cylinder into two liquid chambers, a piston rod with one end being connected to the piston and the other end extending to the outside of the cylinder, a liquid passage formed in the piston rod for connecting the two liquid chambers, an opening adjusting member rotatably disposed in the liquid passage for selectively adjusting the effective passage area of the liquid passage between at least three different passage area conditions, and an actuating device for reciprocatingly rotating the adjusting member between two extreme positions and one or more intermediate positions corresponding to respective passage area conditions. Two fixed stops are provided to stop the adjusting member at respective extreme positions, and a movable stop is provided to stop the adjusting member at an intermediate position.

Abstract: A wiper control system controls an automotive wiper in accordance with rain conditions. Rain conditions are detected by means of a rain sensor which has a vibrator adapted to vibrate at an amplitude corresponding to rain conditions. The vibrator is adapted to produce a sensor signal having an amplitude corresponding to its vibration. The vibrator vibrates at a resonant frequency outside of the audible frequency range and has adequate sensitivity for detecting rain conditions.

Abstract: A reduction motor shaft used, for example, in a wiper motor is disclosed, which is provided with screw type double worms constituting a reduction mechanism part. In this reduction motor shaft, right-handed and left-handed screw type worms are coaxially formed in one end side of the shaft as plural-thread screws at a linked state of tooth profiles of both worms, and further an annular protrusion is formed in a threading boundary between the worms.

Abstract: A rain sensor for an automotive wiper control system detects rain conditions to produce a rain condition indicative signal. The rain sensor includes a vibrator, the outer surface of which is exposed to rain drops and which vibrates or oscillates at an amplitude and frequency corresponding to the energy applied by rain drops. The rain sensor is adapted to produce the rain condition indicative signals corresponding to the vibration amplitude of the vibrator. The vibrator is resiliently suspended within a sensor casing by means of a resilient member which is adapted to allow vibration of the vibrator as rain drops hit the outer surface and to absorb vibrational noises transmitted through the vehicle body. The resilent member simultaneously serves to waterproof the components within the sensor casing.