Abstract: A laser beam reflector for reflecting a laser beam from a laser oscillator in a direction away from said laser oscillator includes a mirror holder, a mirror retainer removably coupled to the mirror holder, a bend mirror coupled to the mirror retainer for reflecting the laser beam, and a detecting device for detecting a positional relationship between the mirror holder and the mirror retainer. A laser beam cutting machine utilizes the laser beam reflector. When the mirror holder and mirror retainer are coupled properly, laser oscillation is performed. When the mirror retainer and holder are coupled improperly, laser oscillation is terminated immediately by a control device of the laser beam cutting machine.

Abstract: An inverter unit for driving a motor with multi-phased currents, each of the phases being derived from a.c. input voltages that are applied to respective input terminals, rectified and smoothed by capacitors before being applied to parallel-connected switching elements to develop each of the phased a.c. outputs. The capacitors may be connected in series and/or in parallel together with the switching elements. In order to reduce the effect of the distributed inductance contributed by the conductors used to connect the capacitances and switches, and thus the need for large snubber capacitances to compensate for the distributed inductances, the connectors are given a geometry and an orientation that causes the inductances to be minimized. Specifically, the conductors are of a bus-plate form, having a large area for improving heat dissipation, and an orientation so that the magnitude and direction of currents flowing through the bus-plates tend to minimize the effect of the distributed inductances.

Abstract: An engine starter comprising an electric motor having a hollow armature rotary shaft, a solenoid switch for energizing the electric motor and having a push rod extending into the into the hollow armatur rotary shaft, an output rotary shaft having a pinion disposed on a front end thereof, the output rotary shaft being axially slidable relative to the armature rotary shaft to move the pinion into and out of engagement with an engine ring gear. A clutch outer member of an over-running clutch unit is mounted on the output rotary shaft and is connected to the electric motor for being rotated thereby, and a clutch inner member driven by the clutch outer member through a plurality of rollers is provided with helical splines on its inner circumferential surface.

Abstract: An intermediate gear type starter motor of the present invention comprises an electric motor with an armature rotary shaft, an overrunning clutch to which rotation of the rotary shaft is transmitted directly or through a speed reducing mechanism, an intermediate gear and a shift coupler. The overrunning clutch rotating a pinion in one way is provided at the front end of the overrunning clutch and is moved axially by a shift lever which is operated by an electromagnetic switch. The intermediate gear is rotatably and axially movably mounted on a supporting shaft arranged in parallel with the axis of the rotary shaft. The intermediate gear is in engagement with the pinion and is moved forwardly to engage with the ring gear of an internal combustion engine.

Abstract: An insulating spacer comprises a plurality of unit spacers each of which has a hollow portion. The unit spacers are disposed between two members, such as electrodes, so that side walls of peripheral portions of the unit spacers are not aligned on a plane between the two members. There is no possibility that the space between the two members may be filled, for the most part, with insulating solid material; and a narrow gap may be present at the remaining minor part of the space. Therefore, there is no possibility of a local concentration of electric field between the two members.

Abstract: This invention relates to an industrial machine control device for controlling machine tools and other industrial machines. The industrial machine control device is able to provide a predetermined position arrival signal with no detectors attached to the machine, and therefore it is possible to carry out the positioning of a movable member with high accuracy and reliability regardless of the life period of time of the detectors which are required in conventional ones.

Abstract: An engine starter comprises an electric motor for starting an engine when the motor is energized, an electromagnetic switch including a pair of normally-open contacts connected to each other to form an energizing circuit for the motor at the time of energizing a coil of the switch, and a pair of normally-closed contacts connected to each other to form a grounding circuit for the motor at the time of de-energizing of said coil, and a restriction device for restricting a braking electrical current generated due to an inertial rotation of the motor.

Abstract: In a wire guide device for a wire electrodischarge machine, a holder member has at least an insertion path permitting insertion of wire electrode and a wire guide forming part of the insertion path. A housing holds the holder member and a guide holding sleeve is provided at the holder engaging part of the housing and resiliently holds the holder member by a device for a working fluid. A groove provided between the guide holding sleeve and the holder engagement part and forms a closed path for sealing the working fluid, and a pressure regulating device provided in the housing communicates with the groove. A positioning device positions the holder member with respect to the housing, around the electrode. A stylus shaped cleaning member (element 75) is used to remove chips deposited near the inner end of tapered cooling apertures to eliminate clogging.

Abstract: A numerically controlled electric discharge machining system high in operability. An instruction command such as a machining operation start time and the contents of machining operations are specified with particular NC codes included in an NC program, so that the machining operation is carried out automatically.

Abstract: An acceleration detector comprising a housing and an acceleration transducer assembly including a piezoelectric element, an inertial weight and an output terminal. A thread-engaging fastener on the bushing, for securing the transducer assembly in the housing, and an electrically insulating washer is provided, and a resilient filler material is applied around the acceleration transducer assembly in the housing so that the movement of the inertial weight relative to the housing is allowed when an acceleration is applied. An electrically insulating, low-friction washer made of a plastic material selected from a group consisting of polyester, polyethylene terephtalate and polyphenylene sulfite is disposed between the thread-engaging fastener and the output terminal of the transducer assembly.

Abstract: A Hall effect type sensing device comprising a casing (20); a magnet (22), a first magnetic flux guide (21a) and a second magnetic flux guide (21b) which define a magnetic circuit; a Hall transducer (24) arranged to be opposite to the magnet (22) in the magnetic circuit; a board (23) for supporting the Hall transducer (24); an air gap formed between the magnet (22) and the Hall transducer (24); a magnetic flux shutter (5) which can shunt a magnetic flux in the air gap, and which passes through the air gap to cause a change in the magnetic flux, the change being detected by the Hall transducer (24); and an urging member (30) including a supporting arm (30a) for supporting a Hall IC assembly and an urging arm (30b) for urging the supporting arm (30a) to an inner wall of the casing (20), the Hall IC assembly being constituted by the second magnetic flux guide (21b), the Hall transducer (24) and the board (23); wherein the Hall IC assembly is located by an urging force of the urging member (30).

Abstract: In a starter, the pinion, which is rotated by torque of an electric motor, is slid axially by the plunger of an electromagnetic switch and is pushed against the engine ring gear by a conically coiled compression coil, which allows employment of a small electromagnetic switch. Further, in an electromagnetic switch in which the plunger confronted coaxially with the stationary iron core slidably supporting a rod with a movable contact is moved towards the stationary iron core by electromagnetic force, a conically coiled spring is interposed between the plunger and the stationary iron core in such a manner that the spring is substantially coaxial with the plunger and the iron core, so that the playing of the rod is prevented.

Abstract: In a speed reduction motor comprising a motor and a speed reduction device connected to the motor for the purpose of reducing and transmitting rotation therethrough, a gear casing for housing gears of the speed reduction device is formed integrally with a rear gear bracket and a stator frame, so that the number of working steps are reduced and alignment of the gears is enhanced with high accuracy. Further, an opening portion is provided on an outer circumference of the gear casing through which the gears can be installed with ease of assembly.

Abstract: An engine starter/generator has a rotor which rotates on excitation caused by an exciting winding, a speed reducer which reduces the speed of rotation of the rotor, a first clutch which transmits the rotation of the rotor, the speed of which has been reduced through the speed reducer, to an output shaft of an engine, and a second clutch which is disposed between the engine output shaft and the rotor to connect together these two members when the speed of rotation of the engine output shaft is greater than that of the rotor. The speed reducer and at least either one of the first and second clutches are disposed substantially axially in line with one another. This arrangement reduces the radial dimension of the engine starter/generator. It can, therefore, be disposed with in the engine room of a vehicle without difficulty.

Abstract: An antiskid apparatus including a first filter circuit having a predetermined cut-off frequency and a second filter circuit having a variable cut-off frequency, each of which filter the speed of a vehicle wheel. The output of the first filter circuit is applied to a deceleration detecting circuit, a vehicle speed detecting circuit, and a slip quantity calculating circuit for respectively calculating the deceleration of the vehicle wheel, the estimated vehicle speed, and a slip quantity of the vehicle wheel with respect to the vehicle speed. In response to the first wheel deceleration signal and the slip quantity signal, a cut-off frequency changing circuit alters the cut-off frequency of the second filter circuit, whose output is applied to a second wheel deceleration detecting circuit.

Abstract: An ignition control apparatus for an engine which includes an ignition circuit for igniting a cylinder, and an ignition timing controller for controlling the ignition circuit so as to properly control the ignition timing of each cylinder. The ignition timing controller includes a first signal generator for generating a reference signal corresponding to a prescribed crank position of the cylinder in sync with the rotation of the engine, a second signal generator for generating a pulse signal in sync with the rotation of the engine. The pulse signal contains a prescribed number of pulses per revolution of the engine. A pulse counting circuit starts to count the number of pulses generated by the second signal generator from the time of occurence of the reference signal and generates an ignition signal for the ignition circuit so as to ignite the cylinder when it counts a prescribed number of pulses generated by the second signal generator.

Abstract: This invention relates to a solid laser device with a slab-shaped laser medium. One example of a solid laser device according to the invention, comprises: a slab-shaped laser medium having one pair of optically smooth surfaces confronting each other through the optical path; first and second mirrors arranged on the optical path in such a manner that the first and second mirrors are confronted with each other through the laser medium; a resonator which forms an unstable resonator in the direction of width of the laser medium, and a low order stable resonator in the direction of thickness of the laser medium; and laser beam emergence medium for taking a laser beam out of the a resonator and outputting the laser beam from the device.

Abstract: A rear-wheel steering angle detecting apparatus according to the present invention includes an absolute value type rotary encoder (13) operatively connected with a rear-wheel steering mechanism for detecting the steering angle of the rear wheels of a vehicle, and a controller for finely dividing the output of the rotary encoder by the output of a pulse generator (12) for fine division of the rear-wheel steering angle. By finely dividing the rear-wheel steering angle, as detected by the rotary encoder, by the number of pulses generated by the pulse generator, which is used for speed detection, the rear-wheel steering angle is detected with a high degree of resolution.

Abstract: A fitting of a first member into a second member is performed until an insertion depth becomes a predetermined value while applying ultrasonic vibration continuously to either or both of the members and, thereafter, the application of ultrasonic vibration is made intermittent.

Abstract: A reversible control apparatus for controlling a motor is provided which is highly durable, weather proof, simple in structure and inexpensive to manufacture. The motor is controllably driven by a motor driver. A target rotational speed determiner determines a target rotational speed for the motor and generates a corresponding output signal. A rotational speed sensor senses the rotational speed of the motor and generates a corresponding output signal having no polarity which indicates the direction of rotation of the motor. A motor controller controls the motor driver. A polarity applying means applies a polarity to the output signal of the rotational speed sensor on the basis of the output signal of the target rotational speed signal and the output signal of the motor controller.