Abstract: An open load and a supply fault are differentiated between and detected with a simple configuration. A switching element (Q1) connected between the positive electrode of a direct current power supply and an output terminal (9) is caused to carry out a switching operation, thereby driving a load (7) connected to the output terminal (9). A load trouble detection circuit (21) that detects an opening of the load (7) or a supply fault when the voltage of the output terminal (9) is higher than the value of a first threshold voltage, and a supply fault detection circuit (25) that detects a failure of supply to the power supply of the load (7) when the voltage of the output terminal (9) is higher than the value of a second threshold value voltage subtracted from the power supply voltage when the switching element (Q1) is in an off-state, are included.

Abstract: An open load and a supply fault are differentiated between and detected with a simple configuration. A switching element (Q1) connected between the positive electrode of a direct current power supply and an output terminal (9) is caused to carry out a switching operation, thereby driving a load (7) connected to the output terminal (9). A load trouble detection circuit (21) that detects an opening of the load (7) or a supply fault when the voltage of the output terminal (9) is higher than the value of a first threshold voltage, and a supply fault detection circuit (25) that detects a failure of supply to the power supply of the load (7) when the voltage of the output terminal (9) is higher than the value of a second threshold value voltage subtracted from the power supply voltage when the switching element (Q1) is in an off-state, are included.

Abstract: The invention provides a low cost semiconductor device with which it is possible to easily select IGBT soft shutdown characteristics appropriate to a system. The drive IC (100) is configured of an output stage circuit (1), a shutdown circuit (2), a logic circuit (3), and an alarm signal processing circuit (4), the shutdown circuit (2) is configured of a resistor circuit (5) and an n-MOSFET (8), and the resistor circuit (5) is formed by an n-MOSFET (9), a resistor (10), and a switching conductor (11). By switching the switching conductor (11) of the resistor circuit (5) among A, B, and C conditions, it is possible to easily select shutdown characteristics of an IGBT (61) appropriate to a system.

Abstract: The invention provides a low cost semiconductor device with which it is possible to easily select IGBT soft shutdown characteristics appropriate to a system. The drive IC (100) is configured of an output stage circuit (1), a shutdown circuit (2), a logic circuit (3), and an alarm signal processing circuit (4), the shutdown circuit (2) is configured of a resistor circuit (5) and an n-MOSFET (8), and the resistor circuit (5) is formed by an n-MOSFET (9), a resistor (10), and a switching conductor (11). By switching the switching conductor (11) of the resistor circuit (5) among A, B, and C conditions, it is possible to easily select shutdown characteristics of an IGBT (61) appropriate to a system.

Abstract: A drive control apparatus controls a drive of an inductive load having a current flowing therethrough. The drive control apparatus includes a drive control device for controlling a variation of the current flowing through the inductive load within a certain period by Pulse Width Modulation control so as to come close to a reference current value, and a reference value control device for controlling a fluctuation period of the reference current value and making the fluctuation period of the reference current value longer than that of the current flowing through the inductive load by the Pulse Width Modulation control.

Abstract: A drive control apparatus controls a drive of an inductive load having a current flowing therethrough. The drive control apparatus includes a drive control device for controlling a variation of the current flowing through the inductive load within a certain period by Pulse Width Modulation control so as to come close to a reference current value, and a reference value control device for controlling a fluctuation period of the reference current value and making the fluctuation period of the reference current value longer than that of the current flowing through the inductive load by the Pulse Width Modulation control.

Abstract: In an ignition semiconductor device, a self-shut down circuit forcibly turns off an IGBT when an input signal is continuously applied. The self-shut down circuit is formed of a main-current gradual-reduction circuit having a timer circuit, a capacitor, a resistor, and an FET. When the timer circuit, which is actuated when the input signal is input, counts out, the FET is turned on to cause a capacitor, which is connected parallel to a resistor for producing a reference voltage for a current-limiting circuit, to discharge slowly through the resistor, thereby gradually reducing the reference voltage. Correspondingly, the current-limiting circuit reduces the main current to turn off the IGBT. The slow turn-off operation of the IGBT prevents a high voltage from being generated in the ignition coil.

Abstract: A switch body has a wiper switch unit installed with a wiper operation lever, and a turn signal switch unit installed with a turn signal operation lever installed respectively therein. The switch body also has a CPU, a keyless reception circuit and an anti-burglar amplifier circuit incorporated therein. An antenna for the keyless reception circuit located within the wiper operation lever also functions as an antenna for the anti-burglar amplifier circuit.

Abstract: A slide switch opening and closing a circuit for supplies electricity to a load by making and breaking contact between a movable contact and a stationary contact. The stationary contact is integrally formed with an arc generating portion for generating an arc when the circuit is opened or closed. The arc generating portion protrudes in the direction of movement of the movable contact and has a width which gradually decreases from its base portion towards its tip portion. The slide switch is capable of preventing the arc generating portion and the movable contact from having a groove due to wear.

Abstract: A switch device includes a stationary contact, a movable contact member having a pair of arms on both sides through which the movable contact piece is swung so as to be brought selectively into or out of engagement with the stationary contact. The movable contact piece is sloping near the dead point thereof on a surface to be pushed. The device both includes an operating knob having a pusher adapted to apply a force the surface to be pushed, the pusher swinging the movable contact piece when the pusher, and sliding on the surface to be pushed, goes over the dead point, wherein the center of swing of the movable contact piece is substantially equal in level to the dead point on the surface which is to be pushed.

Abstract: A switch device includes a switch body, an operating knob rockingly provided on the switch body, an articulation surface provided in a rear surface the operating knob, an articulation piece provided on the switch body, the articulation piece being pushed against the articulation surface to urge the operating knob to be set at a neutral position, a pusher cooperating with the operating knob a switch operated by the pusher when the operating knob rocks, and a pin penetrating both side walls of the operating knob and extending through the pusher, the pin being provided inside the operating knob, the pin inserted into an elongated hole formed in said articulation piece to permit an articulating motion of the articulation piece.

Abstract: A sliding switch having a tandem-type contact structure in which a first and a second insulation portion are disposed in a first and a second negative fixed contact, respectively, of a first and a second group of fixed contacts. When a first and a second movable contact slide between a neutral position and a first operating position, an arc is produced between the first movable contact and the first negative fixed contact in which the first insulation portion is disposed. When the first and the second movable contact slide between the neutral position and a second operating position, an arc is produced between the second movable contact and the second negative fixed contact in which the second insulation portion is disposed. A decline in the insulation performance between the fixed contacts of different polarities is prevented.

Abstract: Two leaf springs of substantially identical width which define first and second movable members are superposed on each other at one end and connected together. A movable contact is attached to the thus connected portion. The first movable member has a slot formed in a middle portion thereof. The width of an end portion of the second movable member is set so that the end portion can be inserted in the slot. A supporting member being inserted in the slot has a portion for swingably supporting an edge portion of the slot and another portion for swingably supporting an end portion of the second movable member opposite to the movable contact. The second movable member is curved so that upon application of a operating force to the first movable member the urging direction of the second movable member changes to cause a snap action to thereby selectively bring the movable contact into contact with one of the two fixed contacts.

Abstract: A multiple contact switch having at least one elastically deformable contact spring that is deformed by means of projections from a plunger to initiate contact with normally-open electrical contacts within the switch. A normally-closed contact piece within the switch also confronts the normally-open contact. Upon deformation of the elastically deformable spring contact, contacts are made and interrupted by means of contacts affixed to the movable contact springs.

Abstract: A snap switch with a self-cleaning function having a switch body with a fixed contact and a movable contact for performing make-break operations. A knob, mounted on the switch body, operates a contact operation member causing the movable contact to abut the fixed contact when the knob is rotated by a predetermined rotational angle and further causing the movable contact to slide on the fixed contact when the knob is further rotated.

Abstract: There is disclosed heat curable organopolysiloxane compositions which contain adhesion additives which are organosilicon compounds which contain an epoxy functional group and at least one alkyl group or low molecular weight alkenyl group or hydrogen atom bound to silicon.

Abstract: A radio antenna device having an antenna wire and a gain increasing antenna secured to the rear window of motor vehicle in the same manner as is used for a moisture preventive heat wire. An antenna wire is secured to the rear window of a motor vehicle in an attempt to reduce such disturbance in receiving a radio wave, which accrues from an engine, electric generator and electric motor mounted on a motor vehicle or for the purpose of eliminating a space for mounting an antenna, while a gain increasing antenna is provided for compensating for the reduction in radio-wave receiving level, which is caused by shielding action of a moisture preventive heat wire which is secured to the rear window or a portion of a vehicle body, which extends along the periphery of the rear window.

Abstract: A radio antenna device having a gain compensating circuit and an antenna wire rigidly secured to the rear window of a motor vehicle, coupled with a moisture preventive heat wire. The antenna wire is secured to the rear window of the motor vehicle so as to reduce the noise in the received radio waves, which results from electrical noise from the vehicle engine, electric generator and electric motor. The rear window also serves as a convenient antenna space. A gain compensating circuit is provided for compensating for the reduction in the level of the received radio wave, which reduction is caused by the shielding action of the moisture preventive heat wire secured to the rear window and the portion of the body of the vehicle, which extends along the periphery of a rear window.