Abstract: [Subject] To provide a highly-reliable and small-size chip component, e.g., a chip resistor having an accurate resistance value. [Solution] The chip resistor (10) includes: a substrate (11); a plurality of resistor elements each having a resistive film portion (20) provided on the substrate (11) and an aluminum-containing interconnection film portion (21) provided in contact with the resistive film portion (20); electrodes (12, 13) provided on the substrate (11); and a plurality of fuses (F) each having an aluminum-containing interconnection film portion integral with the aluminum-containing interconnection film portion of the resistor element and disconnectably connecting the resistor element to the electrodes (12, 13). [Effect] The resistance of the chip resistor can be adjusted at a desired resistance value by selectively disconnecting desired ones of the fuses.

Abstract: A digital wake-up signal is generated from an analog switch on a printed circuit board in which a ground trace and multiple conductive switch traces are bridged by a moveable contactor responsive to movement of an actuator. A resistor network is coupled to the switch traces and alternatingly connects the switch traces to two outputs to generate distinct analog voltage outputs. A logic gate determines when both outputs are at the same voltage corresponding to the contactor engaged between two adjacent switch traces and generates a wake-up command signal.

Abstract: In an appliance such as an oven for cooking food, the invention contemplates a user rotatable, single knob oven control device which provides both discrete and continuous control signals to the appliance controller. The discrete outputs indicate selection of oven features, and the continuous output the desired baking temperature. These inputs are selected by a user in response to rotation of a user interface knob mounted on a control panel. The control panel provides visual indication of oven cooking temperature selections through a first arc around the knob, and user selectable oven features (such as, e.g., OFF/CANCEL, BROIL, and CLEAN) in a second arc around the knob. The control device comprises a hub having a portion adapted to be drivably coupled to the user interface knob. The hub also includes a flange which has at least one cam. The device also includes a variable resistance element having a rotatable shaft in driving engagement with the hub.

Abstract: The positive temperature coefficient thermistor heater is composed of a positive temperature coefficient thermistor element, and electrodes formed on the both principal faces of the thermistor element. At least one of the electrodes consists of split electrodes. The positive temperature coefficient thermistor heater device has a positive temperature coefficient thermistor heater in which at least one of the electrodes consists of split electrodes, and radiator plates disposed on the both principal faces of the thermistor element. The split electrodes of the positive temperature coefficient thermistor heater are equal in area to each other, or different from each other.

Abstract: An electric tool rheostatic device in a switching arrangement is provided for regulating the speed of an electric motor in an electric tool. A circuit board for receiving electronic components is disposed in a switch housing. A potentiometer disposed within the switch housing includes a potentiometer slider operatively connected with a manually-operated actuating member and a resistance track that is constituted by a chip resistance element produced independently of the circuit board according to surface mounted device technology and mounted on the circuit board independently of the potentiometer slider. Upon assembly of the switching arrangement the potentiometer slide is adjustably located on the resistance track by the manually-operated actuating member for controlling resistance.

Abstract: A variable resistor is provided with a series resistor network including first, second and third resistor parts which are connected in series, where the second resistor part is connected to the first and third resistor parts via first and second nodes, respectively, and a fourth resistor part, coupled in parallel to the second resistor part via the first and second nodes. The fourth resistor part includes a plurality of resistors which are connected in series via a plurality of third nodes. The first resistor part has a terminal opposite the first node for receiving an input signal, and an output signal of the variable resistor is obtained via an arbitrary one of the third nodes of the fourth resistor part.

Abstract: A circuit and apparatus for sensing the adjustment of a variable impedance device includes an elongated switching element having an alternating series of conductive and non-conductive areas. The conductive areas are electrically connected. As the device is adjusted, a wiper alternately operates the switch between open and closed states. A circuit detects the switch-state change and provides a signal which indicates that the device is being adjusted. The signal can, in turn, determine the output of a dimming circuit, a wireless transmitter, etc., or can determine whether power is provided to a microprocessor or the like. In another embodiment of the invention, a variable impedance device includes an end-of-travel return mechanism.

Abstract: Disclosed is a novel controller for electric devices directed to use in bath, comprising a moisture- and waterproof container that encloses the main part of an electric device; a magnet movably provided outside the container; a switch means provided inside the container, the switch means being operable by moving a movable piece; and a magnetic body equipped to the movable piece in correspondence with the moving route of the magnet.

Abstract: A switched attenuator circuit providing three selectable voltage-divider ratios including one which passes substantially 100 percent of the input signal. The circuit places constant load resistance on its source in all positions when driving a high-resistance load. The circuit is inexpensive to construct, comprising three attenuation resistors, two input resistance compensating resistors, and two single-pole double-throw switching elements for changing the series/parallel configuration of the attenuation resistors and switching the compensating resistors into the circuit. The circuit places all parasitic capacitance associated with the switches on the input side of the circuit, thereby providing uniformly low output capacitance for all voltage-divider ratios.

Abstract: Adjustable electronic temperature control, having a bridge circuit with arms and at least one diagonal connected between points of the bridge, a thermistor for sensing temperature connected in one of the arms, a control circuit to be activated by the temperature control, a circuit for activating an indicating and safety device, at least two amplifiers for switching the control circuit and indicating and safety circuit on and off, means connected in the at least one diagonal for supplying a control voltage to the amplifiers, a plurality of resistors connectible in parallel in another arm for setting a setpoint temperature in the temperature control, the resistors having values increasing in a binary code, and at least one coding switch for selectively connecting the resistors in parallel in accordance with given temperature steps.

Abstract: A controllable electric heating device uses a PTC resistance body having first areal electrode on one surface and two spaced apart areal electrodes of different areal size on the opposite surface in overlapping relation with a part of the first electrode to provide at least two current paths through the resistance body between the opposite surfaces. The first electrode is connected to one terminal of a voltage source. A switching device selectively connects one or more of the two spaced apart electrodes to the other terminal of the voltage source so that the effective electrode areas are altered thereby adjusting the current flow in the PTC body to produce different temperature levels of the heating device.

Abstract: A portable switch and dimmer control console for conveniently controlling a plurality of electrical devices and variably controlling the intensity of at least one fixture in a single conveniently designed self-contained portable unit.