Abstract: An electronic adapter and a method for controlling a bistable valve for liquid or gaseous media is provided.

Abstract: An electronic switch employing two input lines, but overcoming the problem in installation of the conventional 3-line electronic switch and the problem in power consumption and power stability of the conventional 2-line electronic switch.

Abstract: A magnet device with double fixing positions for changing the magnetic circuit is provided, and includes an external housing whose inner edge is fitted with a coil The inside of the external housing includes a space for the axial movement of an iron core. The external housing and a positioning cover at the opening end of the housing are made of metal with excellent magnetic conductivity. The iron core is connected to a permanent magnet which is fixed at the inner side of the positioning cover. A drive circuit is provided whereby a positive impulse voltage will be output and the electrical energy is saved in a capacitor when the power is switched on. A discharge current is created to output a negative impulse voltage after the power is switched off, and the positive and the negative impulse voltages serve to make the coil change the direction of the magnetic force by the excitation process, so that a push force or a pull force on the iron core will be created for movement thereof.

Abstract: A switched receptacle includes a latching relay selectively providing power to an outlet receptacle. The latching relay is controlled to insure that a flux density in the set mode is no greater than that which is needed to actuate the latching relay while allowing the latch to remain in the actuated position even if this power is terminated. Current limiting is provided for resetting so that zero flux density results when unlatching.

Abstract: A power relay for a switching control device of a microwave oven, designed to prolong the life of the power relay by alternately carrying out the drive of the power relay used for controlling the power in a microwave oven at the positive (+) cycle and the negative (-) cycle of the alternating current input voltage, respectively. The output signal of the 50 Hz/60 Hz clock generator for generating the clock signal corresponds to the frequency of the alternating current input voltage and is combined with the output signal of the power relay ON/OFF generator. The power relay ON/OFF control part is composed so as to alternately realize the ON-point and the OFF-point of power relay at the positive cycle and the negative cycle of the alternating current input voltage, respectively, so that no potential difference takespace in one direction between contact of the power relay, and the life is thereby prolonged.

Abstract: A temperature compensated switching relay with thermally effected switching delay should be of simple and compact construction and reliable in switching with precisely adjustable switching delay. For this purpose, the switching relay comprises a switching member (1) movable between two end positions and bearing a permanent magnet (2), with an inherent snapping action to actuate at least one switching contact (6), on opposite sides of the permanent magnet (2) in its direction of movement a first and a second paramagnetic member (3, 4) is provided, on the first paramagnetic member (3) a PTC resistor (5) feedable by a source of current is mounted, and in the end position of the switching member (1) at the second paramagnetic member (4) the distance (A) of the permanent magnet (2) from the first paramagnetic member (3) is less than its distance (B) from the second paramagnetic member (4). The ratios of the distances of the permanent magnet (2) from the paramagnetic members (3, 4) can expediently be adjusted.

Abstract: The magnetic field sensor comprises a bundle consisting of a plurality of identical parallel bistable magnetic elements, which are surrounded by respective electrical windings, which are all wound in the same sense and are electrically connected in parallel.

Abstract: A three-state polarized electromagnet comprises a stationary system (1) surrounded by a coil (5) and a moving system (7). Each system consists of a permanent magnet (2; 14) fitted with pole pieces (3, 4; 12, 13). The ends of the pole pieces are bent-back towards each other in order to define four air-gaps (E1 to E4) for permitting displacement of the moving system (7) between two end positions. One end portion of a pole piece forms part of only one air-gap and the air-gap faces are joined to pole faces of permanent magnets having the same polarity in order to reduce to zero the fluxes within the air-gaps which are closed when no excitation is applied and in order to permit a return to a stable central position.

Abstract: An electronic circuit for the performing of a monostable switching function in a bistable relay through the conversion of binary input signals into control signals for the bridge switching circuit consisting of two bridge branches with complementary operating electronic switches. The flow direction of the current is reversible in the relay through intermediary of the bridge switching circuit, and the relay is switchable at each change in the level of the input signal through a pulse with a predetermined energy content.

Abstract: A control circuit for a magnetic probe. A power supply connects the available power to the direct voltages required to control electronic circuitry, and a voltage required for the magnetic probe. A clock establishes a time base for the entire device. A current alternator changes the direction of current flow through the magnet to change the polarity, and a pulse rate control sets the frequency with which the polarity is changed. The current alternator is variable to allow one polarity to remain for a longer time than the other, and to vary the timing for each. The frequency of the pulsing is counted, and the particular frequency is displayed in readable form.

Abstract: The invention is directed to a current regulator for an electromagnetic load used in conjunction with an internal combustion engine. The regulator produces positive and/or negative currents flowing through an electromagnetic load. In this arrangement, the two potentials present at a precision resistor that is connected in series with the load are adjusted to freely selectable values. To obtain both positive and negative currents, the current defined by the voltage drop occurring along the precision resistor is provided by a bridge circuit made up of four current-controlling arrangements. Allowance can be made for particular operating conditions of the current regulator simply by presetting desired values.

Abstract: An electronic switching device employing a self-keeping type relay having an exciting coil (41), which comprises a signal generator (1), a first switching transistor (5) connected through a diode (43) to the coil, a second capacitor (42) connected in series with the coil, a second switching transistor (44) connected across the coil and the second capacitor, a first capacitor connected across the second capacitor, the coil, the diode and the first switching transistor, a high resistance circuit (3) interposed between a power source (E) and the first capacitor, whereby the exciting coil is supplied with a positive momentary discharging current from the first capacitor through the first switching transistor so as to set the relay and the second capacitor and is supplied with a negative momentary discharging current from the second capacitor through the second switching transistor so as to reset the relay.

Abstract: A relay driver circuit, suitable for controlling a bistable relay, includes a storage device which is charged to a first voltage level by a low current flow voltage source. A first switching circuit couples the storage device to the bistable relay when the first voltage level exceeds a predetermined value. The charge on the storage device is dumped into the relay and forces it into a first state (set). A second switching circuit is coupled to sense the voltage on the storage device and the voltage on the low voltage source. When the voltage on the low voltage source falls below the voltage on the storage device, current flows from the storage device and forces the relay into a second state (reset). The reset time is within 100 .mu.s.

Abstract: A circuit device for driving an electromagnetically movable unit at a high speed with a single power source such as a battery comprises a plurality of power transistors for inverting the polarities of the input power, a pair of control transistors connected via a NOT element to the control circuit of the transistors for turning then alternately on or off, and instantaneous double voltage generator connected to the output circuit of the power transistors. Rapid responsiveness of the circuit device can be obtained by magnetically driving the movable unit in both one way and return way without a conventional return spring.

Abstract: An electronic actuator having an armature movable between the legs of a u-shaped structure of magnetic material and guided by a sleeve of non-magnetic material which is held in place by an annular member of the magnetic material. A permanent magnet is located between the legs and is secured between the magnetic structure and the annular member to form a magnetic path through the parts and to magnetically latch the armature in either of two positions. Electromagnetic coils are mounted on the sleeve on opposite sides of the annular member to selectively drive the armature to either of such positions.

Abstract: A system for controlling an electrical load having a magnetic latching relay operable in response to a change in the direction of current through said relay. A control circuit is provided having a switch with one contact connected to a contact of the relay. A first current path and second current path are supplied to a second contact of the switch. The current paths are enabled when the switch operating member connects the relay to the second contact. One of two current carrying paths are provided between the second contact and a source of electrical voltage. The current paths are enabled in response to the voltage stored on a capacitor connected to the first of said contacts. Depending upon the state of the relay, the proper current path is enabled, permitting a change in state of the relay.

Abstract: A polarity sensitive relay fabricated of and controlled by, solid state components is provided to produce a more trouble-free and smaller device. The relay may be made in first and second versions, the first of which responds to input signals of a single polarity and the second of which produces first and second output signals in response to input signals of first and second polarities, respectively. The relays include first or second Wiegand modules each of which has a drive coil, an input signal coil and an output signal winding. The Wiegand modules are placed in a steady state magnetic bias and the drive coils pulsed at a predetermined frequency. When two modules are used, the input signal coils are connected in series and in a manner to produce opposite magnetic effects on their associated Wiegand modules.

Abstract: A device for controlling an electromechanical transducer such as a proportional electromagnetic valve, in which a pulse signal having a constant period shorter sufficiently than the minimum response time required for the displacement of the plunger of the proportional electromagnetic valve over its predetermined full stroke is applied to the electromagnetic coil of the proportional electromagnetic valve to superpose a very small vibratory stroke component on the stroke of the plunger, and the duty cycle of the pulse signal applied to the electromagnetic coil is varied so as to urge the plunger in directly proportional relation to the variation of the duty cycle without substantially giving rise to mechanical hysteresis in the stroke of the plunger.

Abstract: An electrical relay is provided with bifilar windings defining a first coil and a single winding defining a second coil. Each of the bifilar windings is connected in series with an RC network and this circuit is connected in parallel with the transmission line. When an AC current flows in the transmission line and through the bifilar windings and single winding, this does not cause the armature to move. When a DC current flows in the transmission line, it flows through the bifilar windings but is blocked by the RC network from flowing through the single winding which causes the leg of the armature to be attracted to the bifilar windings coil thereby operating the relay.

Abstract: An electromagnetic relay comprising an electromagnetic device connectable to a power source, utilized to repel a movable blade and thus separate its movable contact from a fixed contact, driving the blade into another configuration in which it is maintained by a permanent magnet. The current in the energizing circuit of the electromagnetic device flows through the movable contact and through the fixed contact so that when the blade is driven into the second configuration, such energizing circuit is interrupted.

Abstract: The variable attenuator and variable current shunt of a battery-powered auto-ranging digital multimeter uses latching relays, each of which, since it is stable in each of its two switching states, requires only a current pulse to change its state. The circuit which operates the relays provides a drive pulse only when the desired relay state differs from the actual state, thus minimizing the power required, and includes a tank circuit for minimizing disturbance to the multimeter power supply. To ensure that the tank circuit can recharge, each relay is driven by a tri-state output.

Abstract: A circuit for selectively controlling bidirectional energization of a plurality of latching solenoid coils and incorporating electrical failure detection means therein. The coils are connected in a series chain and a plurality of independently actuable switching means are provided for connecting a positive voltage potential, a negative voltage potential, or no voltage potential to any of a plurality of terminals defined by the ends of the chain and the junctions between two adjacent coils of the chain. The solenoid coils are energized by a momentary current pulse, and the switching means are selectively actuated to control the direction of the energizing current through any of the coils. A voltage divider establishes voltage potentials at the ends of the chain which vary from a predetermined value during a failure mode of operation of the circuit.

Abstract: Circuit arrangements for the control of a bistable relay having a capacitor connected in series with its excitation winding, in which the series connection of coil and capacitor is connected to excitation voltage for the excitation of the relay and simultaneous charging of the capacitor, and, upon absence of excitation voltage, is short-circuitable through a semiconductor switch having its output circuit parallel-connected with the series connection of coil and capacitor, whereby the relay switches back to its starting position.

Abstract: A power switching circuit for a building which allows remote operation of individual relatively small load portions such as lighting areas, climate control apparatus etc. The entire building can also be powered up or down remotely avoiding current surges by the provision of a motor driven contact arm making contact sequentially with all remote control relays.