Showing papers on "Contactor published in 1986"

Service temperature connector and packaging structure of semiconductor device employing the same

Abstract: The present invention discloses a connector comprising: an insulating substrate having a plurality of through-holes and having a desired first circuit pattern formed on the substrate; female contactors each being formed and fixed around the edge of the through-hole and having an opening, an edge of which extends inwardly of the through-hole, said female contactors being electrically connected to said first pattern; and a male contactor comprising an insulating substrate having a desired second circuit pattern thereon and a plurality of male contactor pins fixed to the substrate and electrically connected to said second pattern, said pins each being located in a position corresponding to each of the openings of said female contactors, wherein said female contactors are made of a thin film of a shape memory alloy and the edge of each of the female contactors is given, before inserting each of the male contactor pins, such a shape memory that the contactor is returned to a position to close the opening when said contactor is subjected to a temperature above the martensitic transition temperature.

Zero-current arc-suppression dc circuit breaker

Abstract: A zero-current arc-suppression circuit breaker arrangement having a series circuit including a capacitor power source previously charged and a switch connected in parallel with a series circuit formed of a circuit breaker and a diode. Upon operation, the capacitor power source provides a reverse current for reducing the current flowing to the circuit breaker to a zero-current level and the diode maintains the circuit breaker current at the zero-current level for a predetermined period of time. When the contacts of the circuit breaker are separated during this period, no arc plasma is generated to protect the circuit breaker from damage.

Contactor for integrated circuits

Abstract: A contactor assembly for rapidly and repeatedly electronically testing surface-mounted integrated circuits (IC's), in conjunction with a test handler. The contactor assembly has rows of flexible, slightly bent, cantilevered contacts which are deformed into a plane parallel to the device when undergoing the electronic test. A conductive plate or plates including a capacitor or capacitors is positioned parallel to and closely spaced from the device under test ("DUT"). The capacitor is a decoupler and acts to minimize ground noise during current surges. Ground cables interleaved with signal cables, and in some embodiments the signal lines interacting with other elements of the assembly, cooperate to produce generally "characteristic" (purely resistive) impedance to a fast rising test signal. The assembly may include a plug which fits into a socket designed for the DUT.

Connector for printed circuit board

Abstract: The invention discloses a connector for printed circuit board comprising a first contact piece with a spring contactor, a second contact piece with a spring contactor, and a body in which these spring contactors can be arranged at their positions deviated from each other in lengthwise direction and a printed circuit board can be inserted in and out obliquely between contact points of the spring contactors, characterized in that when the printed circuit board inserted obliquely in the body is situated in substantially horizontal state, the printed circuit board is tightly contacted with the contact points of the spring contactors, thereby electrical connection between the printed circuit board and the first and second contact pieces being exactly and appropriately insured over a long period irrespective of frequency in insertion in and out of the printed circuit board.

Micropositionable piezoelectric contactor

Abstract: A micropositionable contactor for use in automated testing of multiterminal electronic devices includes an elongated metal probe having a contact at one end. A plurality of piezoelectric motors are positioned about the probe are operative to move the probe in a corresponding plurality of directions. Digital electronic circuit means are coupled to the piezoelectric motors to move the probe through a sequence of motions which establish the locations of each contact on the device under test and make appropriate testing connections to one or more of the device contacts.

Modular integral circuit interrupter

Abstract: A circuit interrupter characterized by an assemblage of interconnected electrical units including a circuit breaker, a current limiting structure, a contactor, and a motor controller which units are fitted together detachably into a compact unit, in which the controller controls the contactor and the circuit breaker in response to a predetermined current condition, and in which the circuit interrupter includes a single pair of separable contacts.

Detection device for contact fusion in an electromagnetic contactor

Abstract: A detection device for contact fusion in an electromagnetic contactor in which an electric motor is connected by way of main contact of an electromagnetic contactor on the secondary side of a breaker equipped with electronic tripping device has a detection circuit for the voltage applied to the electromagnetic contactor coil connected in series with a pushbutton switch and a detection circuit for the voltage applied to the electric motor; a relay coil of a relay for detecting the contact fusion is connected to the tripping coil of the breaker and an ON-OFF element for supplying or interrupting the supply of an electrical current to the coil and a control circuit for the ON-OFF element are connected to the detection circuit for the voltage of the electrical motor both of the detection circuits are coupled with each other by a photocoupler, whereby the ON-OFF element is turned ON when the pushbutton switch is turned OFF in the case of the fusion of the main contacts, thereby exciting the relay coil to turn the detection relay for contact fusion to ON, by which the tripping coil is excited to trip the breaker so as to interrupt the operation of the electric motor.

Use of SCR's in extended retarding

Abstract: An improved drive system for large mining trucks employing combined diesel/electric propulsion or the like wherein AC current generated by the alternator is rectified before powering wheel motors and wherein the wheel motors are used as generators to produce a retarding current that is directed to a resistive grid with plurality of shunting circuits thus extending the retard torque during dynamic braking and deceleration of the vehicle wherein the improvement comprises the use of silicon controlled rectifiers (SCR's) rather than contactors to achieve the desired electric circuit arrangement and in particular wherein four SCR's are used in the resistive grid to achieve a seven stage extension of the retarding torque and wherein the SCR's in the DC circuit are deactivated (opened) by back biasing with an SCR circuit that delivers AC current from the alternator to the cathode of a switching SCR in the retarding circuit.

Mechanically operated electric pulse switch and anti-tie down control circuit using the same

Abstract: An alternate or push-push switch mechanism effects movement of a contact actuator (28) from one stable position to another stable position upon a single depression of a pushbutton operator (34,38,40,42,44). Actuator movement causes a spring loaded plunger (28a) to traverse a surface of a normally open contactor (54) to effect momentary contact closure with a stationary contact (46a) during the movement of the actuator and plunger. The duration of contact closure may be controlled or modified by providing a cam on the contactor surface for engagement by the plunger. Two such switches (20a,20b) are employed in series in a control circuit for a manufacturing machine (M) whereby both switches must be operated by a human operator of the machine within the closure duration interval of the contacts of the individual switches to complete the control circuit for the machine.

Theft protection cable and circuit including said cable

Abstract: A theft protection electric cable includes at least one conducting core, a sheath which is least partially insulating, and a suitable connection. The cable is characterized in that it is connected between a source of electrical voltage and a user member by at least one contactor (3), said contactor receiving information concerning the conducting or non-conducting state of the cable and including a spring or switch (11, 34) for interrupting the passage of electricity as a function of said information.

Shunt effect low voltage circuit breaker

Abstract: A circuit breaker, notably breaking the phase and neutral circuit, contains a shunt circuit, constituted by a switching electrode disposed in proximity to the phase contacts to pick up an arc drawn between these contacts, when opening occurs on a short-circuit Transferring the arc onto the switching electrode closes a shunt circuit, creating an internal short-circuit protecting the cables and receivers downstream from the circuit breaker The shunt circuit is broken when the arc is blown out in the arc chute Fast shifting of the arc protects the contact surfaces, notably of the neutral contacts, enabling these contacts to be used for an impulse relay or remote-controlled contactor function

Covers for limiting access to contactor terminals

Abstract: A contactor comprises two covers (14a, 14b) each in the form of a plate snap-fitted into engagement with the housing. Each cover is provided with three small bores (18) which, when the cover member is in position on the housing, lie directly above the terminals of the contactor. The size of the apertures (18) is such as to enable the terminals (20) to be engaged by an appropriate tool, such as an insulated screwdriver, to enable the wiring to the terminals to be changed, but not to permit manual engagement with the terminals (20) such as by the finger of an operative. A resilient portion (26) of cover 14(b) allows a starter contact (22) to be deflected into engagement with starter contact (24).

Refrigeration cycle device

Abstract: PURPOSE: To obtain an optimum refrigerating cycle to meet a load by controlling an output frequency of an inverter in response to an air conditioning load, and selectively supplying an output of the inverter and a commercial power source output to a compressor in response to an air conditioning load. CONSTITUTION: At the time of operating, a controller 50 detects an air conditioning load in response to a detected pressure of a pressure sensor 40, turns ON contactors 51, 52 in the case of the low load to maintain a switching unit 30 in a non-operating state, further controls an output frequency F of an inverter 20 to inverter drive, a compressor 1. And, when the frequency becomes a highest output frequency Fmax as the air conditioning load is increased, a contactor 53 is closed, the unit 30 is operated, the compressor 1 is switched to a commercial power source drive, and the compressor 2 is inverter driven. But, as the conditioning load is increased, the frequency F is increased, while as the load is decreased, the frequency F is decreased. When it becomes a lowest output frequency Fmin, the contactor 53 is opened, the unit 30 is stopped, the inverter drive of the compressor 2 is stopped to switch the compressor 1 to an inverter drive.

Static switch circuit or device for the protected supply of a load, and its line

Abstract: Each phase circuit comprises a static switch of the IGT or GTO type, between the anode and the cathode of which there is arranged in parallel a series mounting of a CTP resistance and of a normally open switch which is closed when a current detector detects a short abnormal intensity lower than six times the rated current; said static switch is locked either immediately when the rate is higher than six, or with a short delay on the contrary. Said device is particularly convenient to be used in industrial installations where it is desired to replace the associations of contactors, thermal relay and circuit breaker by static apparatuses.

Device for protecting an electrical power line against high transient overvoltages

Abstract: A device for protecting a polyphase electric power line against high transient overvoltages comprises at least two stages in series, the first stage being provided with a spark-gap and a decoupling inductor and being followed by a stage having a bridge limiter including two oppositely-biased power diodes each connected in series with a high-value capacitor, a time-delay contactor being placed at the terminals of each power-diode/capacitor assembly so as to permit charging of the capacitors through a resistor and auxiliary diodes and then to permit cut-off of the bridge limiter. The protection device has only one pair of high-value capacitors each connected in common in series with one of the power diodes of each phase, an auxiliary diode being associated with each capacitor.

Consumption circuit for regenerative energy of inverter device

Abstract: PURPOSE: To prevent an abnormal temperature rise and burning by incorporating a temperature sensor into a brake resistor, detecting the temperature rise of the brake resistor and interrupting currents fed from a rectifier. CONSTITUTION: AC power 1 is converted into DC power by a rectifier 1 and a smoothing capacitor 6, and an induction motor 2 is operated through an inverter 3 by DC power. The inverter device makes a brake resistor 4 consume regenerative energy by back electromotive force. A temperature sensor 1 being incorporated into the brake resistor 4 and detecting the temperature of the brake resistor, a second electromagnetic contactor 15, excitation of which is released by a driver circuit 12 receiving a detecting signal from the temperature sensor 14, and a contact 16 for the contactor 15 are added at that time. Consequently, when a transistor 5 for controlling the brake resistor continues a conductive state, the temperature sensor 14 is broken and the excitation of the second electromagnetic contactor 15 is released through the driver circuit 12 when the temperature of the resistor 4 rises and reaches a fixed temperature. Accordingly, the contact 16 is broken, and currents to the brake resistor 4 are interrupted. COPYRIGHT: (C)1988,JPO&Japio

Multiphase solid-state contactor

Abstract: A multiphase solid-state contactor for controlling a principal circuit, comprising a plurality of thyristors connected in anti-parallel relation, and an electronic control circuit connected to the thyristors including a firing control circuit, an input circuit and a surge absorbing circuit. The input circuit may include a rectifier and voltage detector for compensating for variations in the operating voltage of the principal circuit. Each of the firing control circuit, the input circuit and the surge absorbing circuit may comprise separate printed circuit boards which may be mounted in stacked relation in a casing for ease of handling and repair. Auxiliary terminals are also provided for outputting an auxiliary output signal from the device.

Electrical circuit breaker-contactor, notably for capacitor banks

Abstract: The circuit breaker-contactor includes a circuit breaker part with mechanical contacts and a contactor part with mechanical contacts connected in series. A solid-state switch is connected in parallel to the contacts of the contactor part. A control unit controls the solid-state switch and the contactor part, in such a way as to close the circuit when the potential difference passes zero by conduction or interrupting the solid-state switch. The mechanical contacts perform only current conduction by shunting the switch in normal operation. The contacts of the circuit breaker part have associated with them an arcing electrode and a shunt circuit disposed to draw the arc, as soon as the contacts open, and to shunt the solid-state switch and contactor part mechanical contacts assembly.

Two-part fluid contactor

Abstract: Present invention relates to two-part fluid contactors for application in fluid-fluid contacting processes such as liquid-liquid extraction processes used in nuclear fuel reprocessing. The contactor has a first part and a second part with a plurality of annular regions located between the first and second parts and a plurality of settling compartments disposed sequentially along the axis of rotation of the contactor. First and second fluids are introduced into the annular regions, and a mixture of the first and second fluids is transferred into the settling compartments. The first and second fluids substantially separate in the settling compartments and are then removed therefrom. The apparatus is arranged such that in operation the first and second parts may be moved relatively to one another so that conditions exist in the annular regions such that the first and second fluids disperse one within the other to form a mixture of fluids.

Elevator rescue apparatus during stoppage of power supply

Abstract: Series circuits consisting of diodes for blocking reverse currents are inserted between the upper and lower arms of bridge-connected transistors constituting an inverter, and contacts of a contactor adapted to close upon a stoppage of power supply are respectively connected in parallel with the series circuits so as to short-circuit the series circuits of the diodes, whereby the inverter is changed-over from a current type inverter to a voltage type inverter upon the stoppage of the power supply Thus, even in an elevator employing the current type inverter, a rescue operation during the stoppage of the power supply can be performed with a simple circuit arrangement employing a DC power source

Apparatus for controlling an elevator

Abstract: In an elevator controller employing a microcomputer (MPU) for executing several kinds of controls, the MPU supplies an operation checking signal to an MPU checking circuit simultaneously with the operation of a starting contactor or relay, and, if a response to the operation checking signal is not fed back to the MPU within a predetermined time, the MPU recognizes an abnormal condition of the MPU or of the MPU checking circuit and prohibits the elevators from starting to travel. The checking operation of the MPU and the MPU checking circuit is executed each time the starting relay or contactor operates.

Multipole breaking device with remote control

Abstract: A remotely controlled circuit breaker or switch comprises two breaking poles adjoining a remote control unit with an electromagnet, and a toggle for manual operation of the contacts. The remote control unit comprises a selector switch for switching into the electronic circuit a position detector of breaker contacts, four connection terminals, and an electronic power supply circuit for an electromagnet. Two of the input terminals TL (inpulse relay mode) and CT (contactor mode in the active position of the selector switch), are accessible simultaneously with the existence of a priority code between the two controls and of a refresh function of the statuses of the electronic circuit. The latter allows forced manual operation by means of the toggle.

Vital switch control circuit

Abstract: A vital switch control circuit for a railroad switch machine includes a permanent magnet motor which is immune to stray or induced a.c. currents, and which is operable to either of two directions depending on the polarity of energy applied thereto. Switch-normal and switch-reverse contacts of a switch request relay logic circuit establish alternate positive and negative-current paths which are connected over a minimum number of line wires to a motor control contact arrangement and to a mechanically-interlocked, dual-coil, reversing contactor. The reversing contact is operable only above a specific d.c. voltage, therefore providing low-level d.c. immunity in case of grounding or cross-over conditions arising in the line wires. A reverse motor contact and a normal motor contact are used to alternately establish negative-current paths to the permanent magnet motor. Other reverse and normal motor contacts allow energization of the coils of the reversing contactor which have associated normal and reverse contacts, and over which the positive-current paths are established to the permanent magnet motor.

Wire electric discharge machine

Abstract: PURPOSE:To prevent the slip-off of a wire electrode by installing a brake circuit for break-stopping a motor for pretension which pretension-controls the wire electrode on the basis of the detection signal of a wire disconnection detecting circuit and preventing the revolution due to the inertia of a wire feeding bobbin during disconnection trouble. CONSTITUTION:When the disconnection trouble of a wire electrode is generated during the cutting work, a contactor and the wire electrode are separated, and the electric current supplied from a power source voltage stops to flow in a cpupler. There fore, a photocoupler is switched-OFF, and a relay driver operates, and electric current flows in the coil of the relay, and the contact points 33-36 of a brake circuit 40 act, and a dc power source 37 is connected in series with a motor 13 for pretension, and the motor 13 is applied with break. Therefore, the revolution due to the inertia of a wire feeding bobbin connected with the motor 13 is prevented, and when the disconnection trouble of the wire electrode is generated, the slip-off trouble generated between the bobbin and a main tension pulley is prevented.

Automatic inspection device for air compressor system

Abstract: PURPOSE:To inspect the operating condition of an air compressor system by means of a highly reliable and simple device by detecting the pressure of an air tank at least twice, before starting and after a certain time after starting said air compressor, and immediately operating and judging the pressure difference CONSTITUTION:When an electromagnetic contactor 9 is closed in order to start to operate an air compressor 6, a contact 10 is closed and an operating signal 24 is formed Also, with the start of operation, contacts 21, 22 are closed to open an air input valve 5 and an air output value 3, and an AND gate valve 23 forms a valve opening signal 25 And, a pressure signal P of an air tank 4 is formed via a contact 12 A main control unit 39 which consists of a pressure reading circuit, a pressure memory circuit, a timer, an operating circuit, and a control circuit which are not shown in the figure, detects the pressure of the air tank 4 at least twice, immediately after starting and at a set time by a timer, at a certain time interval, and operates and judges the detected pressure difference, to detect the operating condition of an air compressor system easily and securely

System for automatically switching liquid pumps on and off

Abstract: The invention relates to a system for automatically switching on and off, in particular, self-priming rotary pumps in operating ranges with intermittent pump flow and its object is to provide, with simple means, a system which reliably prevents the pump running dry and always guarantees a perfect pumping operation. According to the invention, it is proposed for this purpose to fit, in the liquid pipeline of the pump, an automatic flow controller or switch which closes when liquid flows through and opens if flow ceases and to which the switching contactor of the pump drive motor is connected via two time-interval switches in such a way that, if the liquid pumping ceases or if the automatic flow controller or switch opens, the contactor drops out, the motor switches off and the first time-interval switch is started, that after the expiry of the adjustable time interval of the first time-interval switch, the contactor operates, the motor switches on and the second time-interval switch is started at the same time, and that after the expiry of the set time interval of the second interval switch, the contactor drops out if the automatic flow controller or switch is open (no flow), the motor remains switched off and the first time-interval switch is started again and, if the automatic flow controller or switch is closed the contactor remains energised (flow), i.e. the motor runs and the pump pumps ... Original abstract incomplete.

Circuit interrupter with shock resistant mechanism

Abstract: A circuit interrupter with shock resistant mechanism characterized by a circuit breaker/contactor device in combination with an electromagnetic actuator which comprises a pair of opposed and facing solenoids having aligned armatures for actuating a linkage to open and close contacts of the circuit breaker contactor, and the linkage having a coupler link for movement between co-linear alignment with the armatures when the contacts are closed and for non-linearity when the contacts are open.