Abstract: A vibrating device includes a first case, a second case joined to the first case, flexible bodies each including a free end, piezoelectric elements attached to the respective flexible bodies, and a mass joined to the flexible bodies. The first case has a flat plate shape. The second case includes a bottom and a lateral wall. The vibrating device further includes holder in contact with the first case, the lateral wall, and the bottom.

Abstract: Disclosed herein is a position detection apparatus including: a signal line along which a bit array including a plurality of bits used for expressing information on one of absolute positions in a direction determined in advance is created repeatedly in the direction determined in advance; and an information reading-out section which is capable of making a movement relative to the signal line in the direction determined in advance in accordance with a driving operation carried out by driving means determined in advance and is used for reading out the information expressed by the bits from the signal line.

Abstract: Disclosed herein is a position detection apparatus including: a signal line along which a bit array including a plurality of bits used for expressing information on one of absolute positions in a direction determined in advance is created repeatedly in the direction determined in advance; and an information reading-out section which is capable of making a movement relative to the signal line in the direction determined in advance in accordance with a driving operation carried out by driving means determined in advance and is used for reading out the information expressed by the bits from the signal line.

Abstract: A reference signal generation unit 110a generates a reference signal VCA representing a limit indicator. Under the control of a PWM control unit 120a, a bridge rectification circuit 130a controls the current supplied to a coil 19a to the limit indicator, using a current chopper method. Therewith, the circuit 130a implements synchronous rectification where transistors 10 and 12 are brought into conduction when the current supply is stopped, forming a closed circuit with the coil 19a, and a regenerative current circulates in the closed circuit. During a time period when the reference signal is decreasing relatively rapidly, a SR prohibition unit 115a prohibits the transistor 10 or 12 from being brought into conduction when the current supply is stopped, and thereby the decay of regenerative current is accelerated.

Abstract: In a resistance welding method and a resistance welding apparatus which prevent a decrease in bonding strength between a lead wire and a metal member due to a partially formed current flow path and which immediately removes a defective component from a manufacturing line, a plurality of second welding electrodes in contact with the metal member is provided so as to provide a plurality of current flow paths, and accordingly, to prevent an unevenly distributed current flow. The bonding strength is measured to determine whether it is satisfactory or not on the basis of currents flowing through the second welding electrodes. Also, the electronic component is fixed by the second welding electrodes after resistance welded.

Abstract: The reference signal generation unit 110a integrates, in the integration circuit 3, a staircase signal generated by the staircase generation unit 2, and thereby generates a reference signal VCTA whose signal level changes continuously over time, and which represents a limit value for the supply current. According to the control of the PWM control unit 120a, the bridge rectification circuit 130a maintains the coil supply current at the limit value, using a current chopper method. Additionally, when the current supply is stopped, the bridge rectification circuit 130a performs synchronous rectification, where the transistors 10 and 12 are brought into conduction, and a regenerative current is circulated in a closed circuit formed with the coil 19a. When the reference signal VCTA decreases relatively fast, the synchronous rectification prohibition unit 115a prohibits one of the transistors 10 and 12 from being brought into conduction when the current supply is stopped.

Abstract: The reference signal generation unit 110a integrates, in the integration circuit 3, a staircase signal generated by the staircase generation unit 2, and thereby generates a reference signal VCTA whose signal level changes continuously over time, and which represents a limit value for the supply current. According to the control of the PWM control unit 120a, the bridge rectification circuit 130a maintains the coil supply current at the limit value, using a current chopper method. Additionally, when the current supply is stopped, the bridge rectification circuit 130a performs synchronous rectification, where the transistors 10 and 12 are brought into conduction, and a regenerative current is circulated in a closed circuit formed with the coil 19a. When the reference signal VCTA decreases relatively fast, the synchronous rectification prohibition unit 115a prohibits one of the transistors 10 and 12 from being brought into conduction when the current supply is stopped.

Abstract: A reference signal generation unit 110a generates a reference signal VCA representing a limit indicator. Under the control of a PWM control unit 120a, a bridge rectification circuit 130a controls the current supplied to a coil 19a to the limit indicator, using a current chopper method. Therewith, the circuit 130a implements synchronous rectification where transistors 10 and 12 are brought into conduction when the current supply is stopped, forming a closed circuit with the coil 19a, and a regenerative current circulates in the closed circuit. During a time period when the reference signal is decreasing relatively rapidly, a SR prohibition unit 115a prohibits the transistor 10 or 12 from being brought into conduction when the current supply is stopped, and thereby the decay of regenerative current is accelerated.

Abstract: In a resistance welding method and a resistance welding apparatus which prevent a decrease in bonding strength between a lead wire and a metal member due to a partially formed current flow path and which immediately removes a defective component from a manufacturing line, a plurality of second welding electrodes in contact with the metal member is provided so as to provide a plurality of current flow paths, and accordingly, to prevent an unevenly distributed current flow. The bonding strength is measured to determine whether it is satisfactory or not on the basis of currents flowing through the second welding electrodes. Also, the electronic component is fixed by the second welding electrodes after resistance welded.

Abstract: A variable resistor is constructed to reliably seal the space between a rotor and a substrate without insert-molding the substrate into a case, and to be produced at a very low cost. This variable resistor includes a hollow square-prism shaped case which is open at the top and the bottom, a substrate which is fitted into the lower opening of the case, and on the top surface of which a collector electrode and an arcuate resistor are provided, a rotor rotatably fitted into the upper opening of the case, a slider mounted on the bottom surface of the rotor and making sliding contact with the collector electrode and the resistor, an annular packing member disposed between the rotor and the substrate for sealing the space therebetween, terminals mounted on the substrate and electrically connected to the resistor and the collector electrode, and a metallic cover.

Abstract: A variable resistor is constructed to reliably seal the space between a rotor and a substrate without insert-molding the substrate into a case, and to be produced at a very low cost. This variable resistor includes a hollow square-prism shaped case which is open at the top and the bottom, a substrate which is fitted into the lower opening of the case, and on the top surface of which a collector electrode and an arcuate resistor are provided, a rotor rotatably fitted into the upper opening of the case, a slider mounted on the bottom surface of the rotor and making sliding contact with the collector electrode and the resistor, an annular packing member disposed between the rotor and the substrate for sealing the space therebetween, terminals mounted on the substrate and electrically connected to the resistor and the collector electrode, and a metallic cover.

Abstract: A first rotor and a second rotor are prepared. The first rotor has a resistor and inner-peripheral and outer-peripheral electrodes respectively connected to end portions of this resistor. The second rotor has a resistor and inner-peripheral and outer-peripheral electrodes symmetrical with those of the first rotor, provided at a position corresponding to that obtained by rotating the first rotor about the axis of the first rotor by an angle of 180° with respect to the first rotor. A variable resistor selectively uses either one of the first rotor and second rotor. This makes it possible to provide a variable resistor which requires few parts. Also, this makes it possible to reduce the kinds of bending operations that must be performed on the terminals.

Abstract: A variable resistor includes at least two sliders fixed to the bottom of the concavity of a case, a rotor having an engaging portion for engagement with a tool, on the upper side thereof and rotatably received in the concavity of the case, a resistor substrate having a resistor and an electrode on the underside thereof, capable of being sliding-contacted with the slider, and attached to the underside of the rotor, a cover attached to the opening of the concavity of the case and held in such a manner that the rotor is restrained from rising and is rotatable, and an o ring performing the seal between the inner peripheral surface of the concavity of the case and the outer peripheral surface of the rotor. The rotor has a step portion formed in the outer peripheral surface on the underside thereof with the lower-side portion of the step portion having a short diameter.

Abstract: A variable resistor comprises a case, slide contactors, a rotor, a metal cover and lead terminals. Arms which are respectively provided at central portions of the slide contactors protrude from a bottom surface of a recess portion of the case and are each shaped like a comb. The arms are respectively contacted, at contact portions A, B and C, by electrodes and resistor of the rotor. Lead terminals are each circular in cross section and are respectively connected, at end surfaces of their lead wires, to the slide contactors. This makes it possible to obtain a variable resistor which is easy to manufacture, low in cost and excellent in reliability.

Abstract: A first rotor and a second rotor are prepared. The first rotor has a resistor and inner-peripheral and outer-peripheral electrodes respectively connected to end portions of this resistor. The second rotor has a resistor and inner-peripheral and outer-peripheral electrodes symmetrical with those of the first rotor, provided at a position corresponding to that obtained by rotating the first rotor about the axis of the first rotor by an angle of 180.degree. with respect to the first rotor. A variable resistor selectively uses either one of the first rotor and second rotor. This makes it possible to provide a variable resistor which requires few parts. Also, this makes it possible to reduce the kinds of bending operations that must be performed on the terminals.

Abstract: There is provided a variable resistor having a small number of parts and having an excellent heat releasing property. A rotor is rotatably contained in a concave portion of a case. The rotor has a resistive element provided on the bottom thereof and electrodes connected to both ends of the resistive element. Arms of sliders are provided on the bottom of the concave portion of the case in a sliding relationship with the respective electrodes and resistive element. A metal cover is disposed on the upper surface of the case in contact with the rotor.

Abstract: A ball valve which is opened and shut by the rotation of a spindle (5) to rotate a valve ball (2) engaged with the spindle (5), characterized in that a neck portion (4) of a valve body bearing the spindle (5) is provided integrally therewith with a top flange (7) for mounting either of a handle or an actuator for the operation of the spindle.

Abstract: A constant flow valve comprises a valve body (5) having an inlet passage (2), an outlet passage (3), and a hollow chamber (4) disposed between the passages and inclined with respect to the inlet passage at a certain angle; an opening (7) for connecting the outlet passage with the hollow chamber, an inner circumferential face of the opening being tapered from an upstream side toward a downstream side; a lid body (17) fitted to the valve body; a spindle (9) supported by the lid body and movable back and forth along the axis of the opening; a cylinder (10) integrally arranged at a lower end of the spindle; a valve shaft (12) freely arranged inside the cylinder and positioned substantially on the axis of the opening; a valve plug (13) fitted to a front end of the valve shaft to create an orifice between itself and the opening; and springs (14, 15) disposed inside the cylinder to force the valve plug away from the opening.