Abstract: A method for deriving the position of a pushing roll, applied even when there is a difference between the actual processed shape and a theoretical solution (a numerical analysis solution) due to changes in a state of a processing machine or the bending characteristic of the material to be processed. The rolls have a pyramid-like shape, and the operation amount of a pushing roll is changed while continuously feeding a material, thereby bending the material. Also, for each position of the fixed pushing roll, the radius of curvature of the material is measured and the bending characteristic is grasped in advance. From the design shape, the radius of curvature and the operation amount for bringing the pushing roll into contact are obtained. The operation amount of the pushing roll is then determined.

Abstract: A method for deriving the position of a pushing roll, applied even when there is a difference between the actual processed shape and a theoretical solution (a numerical analysis solution) due to changes in a state of a processing machine or the bending characteristic of the material to be processed. The rolls have a pyramid-like shape, and the operation amount of a pushing roll is changed while continuously feeding a material, thereby bending the material. Also, for each position of the fixed pushing roll, the radius of curvature of the material is measured and the bending characteristic is grasped in advance. From the design shape, the radius of curvature and the operation amount for bringing the pushing roll into contact are obtained. The operation amount of the pushing roll is then determined.

Abstract: A photocurable and thermosetting resin composition comprises a photocurable component, a thermosetting component, and a solvent component, wherein the solvent component contains a compound which exhibits a critical value of the water solubility at 25° C. of 3.0 to 0.1% by weight, preferably 2.5 to 0.

Abstract: A position detector having a movable permanent magnet (5), a circuit board (6) having a magnetic sensor element (1) for detecting the movement of the permanent magnet and a molded resin case (2) supporting the circuit board. The circuit board (6) is surrounded by a box-shaped radiation shield (12) for shielding the circuit board against external electromagnetic radiation. The radiation shield is insert-molded in the mold resin case as its integral part. The radiation shield (12) includes a shield main body (12a) having an open end and a shield cover (12b) closing the open end of the shield main body. The molded resin case (2) has a cavity (2a) open on the same side as the open end of the shield main body (12a) and a case cover (2b) attached to the case opening for closing the cavity.

Abstract: A linear positional displacement detector including a magnetic sensor unit (23) having a magnetic sensing surface formed by a ferromagnetic magnetoresistance element (23a) having a predetermined pattern, and an elongated permanent magnet (22) having a magnetic pole face (22a) at each end. The permanent magnet (22) is movable along its longitudinal axis and magnetically coupled with the magnetic sensor unit (23) with the longitudinal axis positioned on an extended surface of the magnetic sensing surface (23b). A positional displacement of the permanent magnet (22) along the longitudinal axis is detected as a change in the direction of a magnetic flux crossing in parallel the magnetic sensing surface (23b).

Abstract: A magnetic sensor which includes a positioning portion disposed on a bottom surface of a frame at a position opposite a ferromagnetic resistant element through a circuit substrate for positioning and securing a bias magnet.

Abstract: An automotive engine control system is provided for an automobile having a variable rotation speed engine which has a plurality of spark plugs served by respective spark plugs. The system includes an optical rotary encoder having a rotatable pulse scale having a row of code pattern with specific light-permeable or light-deflection slits each for outputting a reference position signal and other light-permeable or light-reflection slits each adapted to reduce the amount of light for outputting an angular signal, both of the optical signals being photoelectronically converted and the waveform of the resultant electric signals being shaped based on threshold voltages into electric pulse signals indicative of a reference angle of 0.degree.

Abstract: An optical rotary encoder having a rotatable pulse scale having a row of code pattern with specific light-permeable or-deflection slits each for outputting a reference position signal and other light-permeable or reflection slits each adapted to reduce the amount of light for outputting an angular signal, both of the optical signals being photoelectronically converted and the waveform of the resultant electric signals being shaped based on threshold voltages into electric pulse signals indicative of a reference angle of 0.degree. and the accumulated angle of rotation, in which the circumferential width of each specific reference slit is made narrower than that of other slit so that the pulse width for angular position indicating of the angular pulse signal is always equal and constant for ensuring more accurate detection of the angle of rotation.

Abstract: A speed governor for a vehicle with an internal combustion engine senses an engine operating condition indicating the vehicle speed. When the vehicle speed indicated by the operating condition exceeds a prescribed speed, the cylinders of the engine are temporarily prevented from firing for short periods until the vehicle speed falls below the prescribed speed. In one form of the invention, a first sensor that senses a first operating condition is used to determine the vehicle speed under normal operating conditions. When the first sensor becomes inappropriate or malfunctions, a second sensor that senses another operating condition is used to determine the vehicle speed.

Abstract: A photointerruptor for use in an optical transmission-type rotary encoder comprising a rotatable pulse scale having a code pattern and a light-emitting optical fiber and a light-receiving optical fiber secured to a housing with their end faces being opposed to each other on both sides of the code pattern. The housing has a housing main body a pair of optical fiber opposing members for previously inserting the top ends of the respective optical fibers and a housing main body having fitting recesses for holding the optical fiber opposing members with the end faces of the optical fibers being opposed to each other at a predetermined distance on both sides of the code pattern. The housing main body may be constituted by a pair of optical fiber opposing members engageable with each other.

Abstract: An optical encoder comprising a photointerruptor having light-emitting and light-receiving optical fibers and a rotatable pulse scale disposed in an optical path between both of the opposed end faces of the optical fibers so as to shut the optical path intermittently, thereby generating optical pulses in accordance with an angle of rotation of the pulse scale, in which the light-receiving optical fiber has a larger diameter and a greater numerical aperture NA than those of the light-emitting fiber. The light-emitting optical fiber may be replaced with a light-emitting device. Further, a reflector may be interposed in the optical path. Optical pulse signals indicative of an angle of rotation can be detected effectively and it is possible to facilitate the assembling or wiring operation and reduce the production cost.

Abstract: A photointerruptor for use in a light transmission type rotary encoder comprising a photointerruptor main body having a plurality pair of light emitting and light receiving optical fibers resin-molded therein, each pair of the optical fibers being disposed such that their end faces are opposed on both sides of each code pattern formed circumferentially on a pulse scale, the light emitting optical fibers joined by way of an optical branching device into a light input end and the light receiving optical fibers being extended in parallel with each other through the photointerruptor and, an adaptor integrally formed to the photointerruptor main body and through which the light input end of the light emitting optical fibers and the light emitting ends of the light receiving optical fibers are extended and arranged such that they are collectively connected with core wires of a multi-cored transmission optical fiber cable by way of a light connector respectively.

Abstract: A crank angle detector includes a first generator 2 for sequentially generating a first signal including a plurality of first pulses corresponding to the number of engine cylinders in two crankshaft revolutions, and a second generator 3 for generating a second signal in two revolutions including a plurality of groups of second pulses, each group of second pulses having a condition which corresponds to a specific period of the first signal and which is different from those of the other groups. A cylinder discriminator 4 is connected to the first and second generators for discriminating the operating strokes of the respective cylinders by detecting a specific pulse condition of the second signal which occurs within a specific period of the first signal. In a preferred embodiment, each of the second pulses has a width less than that of each pulse of the first signal, and each group of second pulses has a total sum of rising and falling edges which is different from that of each of the other groups.

Abstract: An ignition distributor for an internal combustion engine comprises a cylindrical distributor rotor of synthetic resin that rotated synchronously with the revolution of the engine, a rotor electrode radially and outwardly extending from the central portion on an upper surface of the rotor, a plurality of circumferential electrodes disposed in the rotating locus of said rotor and separated from said rotor electrode by a discharge gap, a contact electrode contacting said rotor electrode, a rotation angle sensor, and a signal processing unit for processing output signal from the rotation angle sensor. The signal processing unit is arranged coaxially with and below the distributor rotor, and is provided with a shield cover which is earthed.

Abstract: An ignition distributor for an internal combustion engine has a cylindrical distributor rotor of synthetic resin, rotated synchronously with the revolution of the engine, and a rotor electrode radially and outwardly extending from the central portion on the upper surface of the rotor. A plurality of circumferential electrodes are disposed in the rotating locus of the rotor and are separated from the rotor electrode by a discharge gap. The rotor electrode has the shape of letter T a vertical portion of which is fixed to the distributor rotor and a horizontal portion of which opposes to the circumferential electrode, being in the shape of a circular segment.

Abstract: A rotational angle signal generating system for an internal combustion engine produces its signal from the a.c. signal generated by a magneto-generator mounted in the ignition distributor of the engine.

Abstract: An ignition apparatus for internal combustion engines for preventing input noises out of an ignition signal line from affecting the ignition timing of the engine to make knocking or a start malfunction. A bistable circuit is provided for eliminating such input noises. The bistable circuit is associated with a Schmitt circuit which serves to energize or de-energize an ignition coil for inducing a discharging voltage. The Schmitt circuit is overridden by the bistable circuit for a time interval corresponding to a time for which such input noises exist. Afterwards, the Schmitt circuit receives as an input the ignition signal synchronizing with an engine speed and controls the ignition timing.