Abstract: A method for manufacturing an inexpensive rotation sensor having excellent performance, high workability, and high reliability is provided. In the method, the rotation sensor is manufactured by providing an insert conductor having a predetermined shape and insert-molding the insert conductor in a resin base such that at least a connector terminal and an conversion device terminal of the insert conductor remains exposed from the resin base. Also, a resin connector part is molded after the resin base is molded such that the resin connector part encircles the connector terminal.

Abstract: The invention provides a magnetic sensor which can be easily produced with a correct combination of parts without requiring an operator to pay particular attention.

Abstract: A sensing device outputs a signal which exactly corresponds to a predetermined position (angle) such as a protruding or recessed portion of a moving magnetic material member as soon as electric power to the sensing device is turned on. The sensing device includes: a magnet for generating a magnetic field; a rotary magnetic material member for changing the magnetic field generated by the magnet, the rotary magnetic material member being disposed a predetermined distance apart from the magnet; a plurality of magnetic field detecting elements which change in resistance in response to the magnetic field whose magnitude is changed by the rotary magnetic material member; wherein the plurality of magnetic field detecting elements are disposed so that the center of the gap between the magnetic field detecting elements is not coincident in location with the center of the magnet.

Abstract: A magnetic sensor whose electronic components will never become fatally damaged as the result of an external force. In this magnetic sensor, electronic components located near a connector are connected to a base and disposed in such a manner that the longitudinal axis of those electronic components are substantially perpendicular to the longitudinal axis of the base. A crack generating region is formed between the connector electronic component disposed near the connector. The crack generating region yields application of an external force on the base.

Abstract: A sensing device capable of outputting a correct signal precisely corresponding to a particular position (angle) of, for example a protruding or recessed portion of a rotating member made of a magnetic material as soon as the electric power of the sensing device is turned on.

Abstract: A magnetic detecting apparatus is capable of performing accurate waveform processing without being affected by noise signals or the like, the level shifting circuit thereof having a fixed voltage shift so as to be free of varying amplitudes of analog signals. Waveform shaping circuitry for turning an analog signal detected from a giant magnetoresistive element into a pulse signal includes: the level shifting circuit for generating an amplified voltage (V1) of analog signals and a voltage (V2) which is higher than the voltage (V1) and a voltage (V3) which is lower than the voltage (V1); a circuit which alternately retains the minimum value of the voltage (V2) and the maximum value of the voltage (V3) as a reference voltage; and a comparator circuit which compares a voltage resulting from adding a hysteresis to the voltage (V1) with the reference voltage and issues a pulse signal.

Abstract: The invention provides a high-accuracy and high-reliability magnetic sensor which can be produced with a high production yield at a low cost.

Abstract: The invention provides a sensing device capable of outputting a correct signal precisely corresponding to a particular position (angle) such as a protruding or recessed portion of a rotating member made of a magnetic material over the entire operating temperature range regardless of the temperature coefficient of the magnetic field sensing element. The sensing device includes: a magnet for generating a magnetic field; a rotary member of magnetic material for changing the magnetic field generated by the magnet, the rotary member being disposed at a predetermined distance apart from the magnet; a giant magnetoresistance device which changes in resistance in response to the magnetic field whose magnitude is changed by the rotary member of magnetic material; and an AC coupling circuit for performing an AC coupling process on the output of signal of the giant magnetoresistance device.

Abstract: A rotation sensor is provided which is inexpensive and has excellent performance, high workability, and high reliability. Specifically, the rotation sensor contains a magnetoelectric conversion device, a base, an insert conductor, a surface mount electrode part, an electronic component, and a connector part. The magnetoelectric conversion device senses a magnetic flux change associated with a rotation of a magnetic rotation body, and the base is made of resin and holds the magnetoelectric conversion device. The insert conductor is insert-molded in the base, and an exposed part of the insert conductor is exposed to a surface of the base. The surface mount electrode part is formed by at least the exposed part of the insert conductor and is connected to the magnetoelectric conversion device. The electronic component is mounted on the surface mount electrode part, and the connector part is formed by using an end of the insert conductor as a terminal electrode.

Abstract: The invention provides a sensing device capable of outputting a correct signal precisely corresponding to a particular position (angle) of, for example a protruding or recessed portion of a rotating member made of a magnetic material.

Abstract: A sensor system includes a single sensor means, two sensed signal processing circuits for processing the output signal of the sensor means, both the signal processing circuits being substantially equal in circuit construction, and an abnormality detecting circuit for detecting an abnormality on the basis of the difference between the output signals of the two sensed signal processing circuits.

Abstract: The invention provides a sensing device capable of outputting a high-accuracy signal precisely corresponding to a particular position (angle) of a rotating member made of a magnetic material without being disturbed by external noise. The sensing device includes: a magnet for generating a magnetic field; a rotating member made of a magnetic material, for changing the magnetic field generated by the magnet, the rotating member being disposed a predetermined distance apart from the magnet; and a giant magnetoresistance device whose resistance changes in response to the change in the magnetic field caused by the rotating member of magnetic material, wherein the size L.sub.3 of the magnetic field sensing plane of the giant magnetoresistance device is set to a value less than the smallest value of the dimensions L.sub.1 and L.sub.2 of the protruding and recessed portions of the rotating member of magnetic material, that is, the size L.sub.

Abstract: A polishing apparatus includes a table on which an abrasive cloth is removably applied and an abrasive cloth replacing unit for automatically replacing the abrasive cloth locating on the table with a new abrasive cloth. The replacing unit includes a cloth storage device for storing a plurality of unused abrasive cloths, an abrasive cloth carrier and an abrasive cloth applier. The cloth carrier picks up an abrasive cloth located on the table and carries it to a disposal site and then picks up a new abrasive cloth from the cloth storage device and carries it to the table. The cloth applier presses an abrasive cloth against the table.

Abstract: A ignition coil device for an internal combustion engine includes: a tubular high tension terminal which is electrically connected to a secondary output terminal of an ignition coil and has a side face portion, and one end of which is open; a first member accommodated in the tubular portion of the high tension terminal and fixed in the side face portion; a coil-shaped electrically conductive spring member which is accommodated in the tubular portion of the high tension terminal, and one end portion of which is wound around the first member a plurality of times in contact therewith; a second member accommodated in the tubular portion of the high tension terminal and having a shaft portion around which another end portion of the electrically conductive spring member is wound a plurality of times in contact therewith and a contacting portion which is electrically connected to a conductor of an ignition cable in contact therewith; and a retaining portion for retaining the conductor in a state in which the conduct