Abstract: A linear slide apparatus includes a straightly extending table guide, a table which is supported by one rail portion formed on an upper surface of the table guide and which can move in an axial direction thereof, and an electromagnetic actuator which drives the table. The electromagnetic actuator includes a first core portion, a second core portion, an exciting coil wound around the second core portion, and a moving body comprising a permanent magnet. The table guide made of magnetic material serves as the first core portion. The second core portion is fixedly mounted in the hollow hole of the table guide, and the moving body is accommodated therein movably in the axial direction.

Abstract: An electromagnetic actuator comprises: a fixed core of a magnetic material provided with one pair of pole teeth, which are cylindrical and face each other; exciting coils wound on the fixed core; and a moving object which is movably disposed in the direction of the axis line coaxially with the pole teeth, wherein the moving object includes: cylindrical permanent magnet, in which the N pole and the S pole have been magnetized in the radial direction; and a cylindrical movable core of magnetic material which is coaxially connected to the permanent magnet and is displaced together with the permanent magnet.

Abstract: To provide a static eliminating method and apparatus therefor which applies a high voltage to one of a pair of electrode needles and earths the other thereof, and eliminates the need of an earthed ground plate. A single or several electrodes are provided, having one pair of electrode needles for individually applying positive and negative high voltages facing each other in a holding member made of insulating material.

Abstract: Disclosed herein is a simple, inexpensive linear actuator which is capable of controlling the displacement of the movable body by regulating the amount of electric energy applied without the necessity of detecting the displacement of the movable body with a displacement sensor or controlling the displacement of the movable body by feedback control in response to the detected value.

Abstract: A magnetic damper comprises a movable braking plate for receiving an operating element of an actuator, and a stator for attracting the braking plate by a magnetic force. A magnetic attraction force acting between the stator and the braking plate is used as a braking force for stopping the operating element.

Abstract: A pressure cylinder is connected to an air pressure source through a servo valve, the servo valve is controlled as an on/off switching valve by a control section in an advancing working step of a piston rod, and at the time of backward stroke of the piston rod, an operation position of the piston rod is detected by a position detector to feedback a detection signal to the control section, the servo valve is controlled by the control section such that a deviation between the operation position and a preset stopping position is eliminated, the piston rod is stopped at an intermediate stopping position, and a state in which substantially the same pressures are supplied to pressure chambers formed on opposite sides of the piston is maintained.

Abstract: The invention includes a moving step of moving a piston to a target position by supplying and discharging compressed air to and from pressure chambers on opposite sides of the piston of a pressure cylinder by driving servo valves by a controller, a clamping step of allowing a pressure member at a tip end of a piston rod to touch a workpiece softly in this target position, and a pressing force applying step of pressing the workpiece with the pressure member in a required force.

Abstract: An exciting coil is wound on a cylindrical yoke provided with a pair of pole teeth, a cylindrical permanent magnet where N pole and S pole are magnetized in a radial direction is disposed so as to be movable in a hollow portion of the yoke and the permanent magnet is coupled to a spool by a magnet holder, and a displacement sensor is disposed in a hollow portion of the permanent magnet so as to be positioned on a center axial line of the permanent magnet, so that the displacement of the permanent magnet is detected by the displacement sensor and the degree of opening of the spool is controlled by performing feedback of the displacement to a control portion.

Abstract: A magnetic damper comprises a movable braking plate for receiving an operating element of an actuator, and a stator for attracting the braking plate by a magnetic force. A magnetic attraction force acting between the stator and the braking plate is used as a braking force for stopping the operating element.

Abstract: At a step of pressurizing a workpiece after reducing a speed of a piston rod at an end of a forward stroke of the piston rod by restrictively allowing compressed air to flow out of an exhaust-side pressure chamber, operation of a rapid exhaust valve is triggered by reduction of internal pressure of the exhaust-side pressure chamber to lower pressure than internal pressure of a pressurizing-side pressure chamber to thereby directly open the exhaust-side pressure chamber into the atmosphere through the rapid exhaust valve and rapidly reduce back pressure of a main piston remaining in the exhaust-side pressure chamber.

Abstract: A plurality of permanent magnets are embedded at predetermined pitches &tgr;p in a longitudinal direction in a field yoke composed of a magnetic substance so that adjacent magnet poles have opposite polarity, and a plurality of electromagnets, which have magnetic pole pitches &tgr;e≈(2n+1)&tgr;p of preset intervals provided that n is 0, 1, 2, . . . , which are disposed at predetermined pitches &tgr;g=(2s+1/m)&tgr;e in the longitudinal direction of the field yoke provided that m is a number of exciting phase and s is 1, 2, 3, . . . , and which are separated from the field yoke by a predetermined gap while opposing to the field yoke, are provided. The field yoke is driven by successively exciting the electromagnets.

Abstract: A memory device including a card body including an antenna element and an integrated circuit element, the antenna element being used for performing data communication with a data reader without contacting the data reader, and the integrated circuit element being used for storing data exchanged between the integrated circuit element and the data reader through the antenna element. An electric-wave absorbing member is provided on a back surface of the card body so as to cover the antenna element. Even when a plurality of such memory devices are superimposed upon each other and accommodated in a card case, it is possible to reliably perform data communication with the data reader.

Abstract: An exciting coil is wound on a cylindrical yoke provided with a pair of pole teeth, a cylindrical permanent magnet where N pole and S pole are magnetized in a radial direction is disposed so as to be movable in a hollow portion of the yoke and the permanent magnet is coupled toa spool byamagnet holder, and a displacement sensor is disposed in a hollow portion of the permanent magnet so as to be positioned on a center axial line of the permanent magnet, so that the displacement of the permanent magnet is detected by the displacement sensor and the degree of opening of the spool is controlled by performing feedback of the displacement to a control portion.

Abstract: A pressure cylinder is connected to an air pressure source through a servo valve, the servo valve is controlled as an on/off switching valve by a control section in an advancing working step of a piston rod, and at the time of backward stroke of the piston rod, an operation position of the piston rod is detected by a position detector to feedback a detection signal to the control section, the servo valve is controlled by the control section such that a deviation between the operation position and a preset stopping position is eliminated, the piston rod is stopped at an intermediate stopping position, and a state in which substantially the same pressures are supplied to pressure chambers formed on opposite sides of the piston is maintained.

Abstract: A plurality of permanent magnets are embedded at predetermined pitches &tgr;p in a longitudinal direction in a field yoke composed of a magnetic substance so that adjacent magnet poles have opposite polarity, and a plurality of electromagnets, which have magnetic pole pitches &tgr;≈(2n+1)&tgr;p of preset intervals provided that n is 0, 1, 2, . . . , which are disposed at predetermined pitches &tgr;g=(2s+1/m)&tgr;e in the longitudinal direction of the field yoke provided that m is a number of exciting phase and s is 1, 2, 3, . . . , and which are separated from the field yoke by a predetermined gap while opposing to the field yoke, are provided. The field yoke is driven by successively exciting the electromagnets.

Abstract: This invention relates to a bicycle having a driving force transmitting mechanism with oscillating fulcrum point. A sliding part is provided with a dust cover or a brush to prevent dust and the like from being entered therein and to remove the dust, if entered, therefrom. When a rider steps on the pedals alternatively, force of the pedal levers generated by the oscillation of the pedal levers is transmitted to the sprocket through the crank lever. When the pedal levers oscillate, an oscillating fulcrum point of the pedal lever is moved in a lateral direction within the sliding part. The rotating force of the sprocket is transmitted to the rear wheel through a chain. Even if the locus Q of motion of the pedal is different in the first half period (a stepping-on period) and the second half period (a stepping-up period), a smooth movement of the pedal is assured. Such a smooth movement can be kept enough by the dust cover.

Abstract: This invention relates to a bicycle having a driving force transmitting mechanism with oscillating fulcrum point. A crank lever is connected between a sprocket and the one of pedal levers. When a rider steps on the pedals alternatively, force of the pedal levers generated by the oscillation of the pedal levers is transmitted to the sprocket through the crank lever. When the pedal levers oscillate, an oscillating fulcrum point of the pedal lever is moved, not fixed, in a lateral direction within the sliding part. The rotating force of the sprocket is transmitted to the rear wheel through a chain. With such an arrangement, a configuration of the rotating force transmitting mechanism for the rear wheel is simplified. Even if the locus Q of motion of the pedal is different in the first half period (a stepping-on period) and the second half period (a stepping-up period), a smooth rotation of the pedal is assured.

Abstract: At a step of pressurizing a workpiece after reducing a speed of a piston rod at an end of a forward stroke of the piston rod by restrictively allowing compressed air to flow out of an exhaust-side pressure chamber, operation of a rapid exhaust valve is triggered by reduction of internal pressure of the exhaust-side pressure chamber to lower pressure than internal pressure of a pressurizing-side pressure chamber to thereby directly open the exhaust-side pressure chamber into the atmosphere through the rapid exhaust valve and rapidly reduce back pressure of a main piston remaining in the exhaust-side pressure chamber.