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Patent Searching and Data


Matches 601 - 650 out of 12,241

Document Document Title
WO2000067270A8
Power supply systems and methods can enable an electromagnetic device, such as an electrical contactor, to ride-through both voltage sags and dropouts. In an illustrative embodiment, a rectifier (24) is used to generate a DC input voltag...  
WO/2001/013396A1
The invention relates to an electromagnetic switchgear (1) which comprises a current limiter (5). Said current limiter limits the electric current supplied from a current supply to a limiter current (I¿L?) that is lower than the break-a...  
WO/2001/013395A1
The invention relates to a circuit arrangement (1) for operating a relay. The inventive arrangement provides a making current (ES) for the operating coil (SP) of the relay and subsequently a holding current (HS) after a given time (t1). ...  
WO/2001/009910A1
The invention relates to an electromechanical switching device (1) which can be tripped in a quick and reliable timed manner . The timed tripping circuit comprises a voltage-sensitive switching element (13) which separates an energy stor...  
WO/2001/008188A1
The invention relates to a method for effecting an electronic drive control used for controlling a drive coil of a protection system during holding operation with a pulse-width modulation. The inventive method should, in a simple manner,...  
WO/2001/008307A1
The invention relates to an electronic drive control mechanism for controlling a drive coil of a contactor, said coil having a pulse-width signal that is generated by an arithmetic unit, and a static switch. The aim of the invention is t...  
WO/2001/005628A1
The invention relates to a system for actuating electric functional elements comprising at least two physically separated actuating modules, whereby a) a defined electric function can be selectively triggered by any of the actuating modu...  
WO/2001/004923A1
A system and method for a pulse width modulated (PWM) solenoid driver with a reduced rate of power consumption. The system for driving a solenoid includes a solenoid, a current set-point for establishing a desired current flow through th...  
WO/2001/004922A1
An elecromagnetic contactor (100) which makes or breaks a contact by moving a moving core (1) from a first position which is a wide gap away from a fixed core (20) to a second position a narrow gap away from the fixed core by an electrom...  
WO/2001/003987A1
A circuit (30) for actuating an ABS solenoid valve coil (40) with a pulse width modulated voltage having a constant frequency and variable duty cycle. The coil current is a function of the duty cycle of the pulse width modulated voltage....  
WO/2001/001538A1
The invention relates to a protective circuit with a current sensor (2) and a switch element (3) that is connected in series with a safety coil (1). Said safety coil (1) and said current sensor (2) are encircled by a recovery diode (4). ...  
WO/2000/074192A1
An electronic test circuit (128) for the self-testing of fault detection devices such as GFCI's, AFCI's and RCD's that enhances the safety of such devices by automatically testing the function of all components of these detection compone...  
WO/2000/070634A1
A switch includes an armature, selectively movable between a first position and a second position, a coil for effecting movement of the armature between said first and second positions, a magnet for holding the armature in one of said po...  
WO/2000/067270A1
Power supply systems and methods can enable an electromagnetic device, such as an electrical contactor, to ride-through both voltage sags and dropouts. In an illustrative embodiment, a rectifier (24) is used to generate a DC input voltag...  
WO/2000/060623A1
The invention relates to a circuit provided with a protective function which contains at least two power contactors that have main make contact elements arranged in release current circuits (4). According to the invention, each main make...  
WO/2000/047095A1
A cordless electrically heated water boiling vessel has an enclosure associated with its heating element (3) for simulating a dry boil condition when water boils in the vessel, this enabling dry boil protection and automatic switch off o...  
WO/2000/045403A1
A system for controlling the force and/or motion of an electromagnetic actuator (L1). The actuator (L1) could be a solenoid, relay, or levitating device. The drive (T1) to the coil (L1) can be linear or switching, voltage or current and ...  
WO/2000/044007A1
A solenoid valve controller comprises a solenoid valve (C) that has a closed state where its plunger (a) touches the seat (b) and an open state where the plunger (a) is away from the seat; and control means (e) for carrying out pulse-wid...  
WO/2000/039823A1
A method of determining contact wear in a trip unit of a circuit breaker is presented. The trip unit includes a microcontroller and associated memories. An algorithm (program) stored in a memory of the trip unit measures temperatures rel...  
WO/2000/039915A1
An electrostatic actuator and drive configuration device for use in a system requiring a long term ON state operation. The device includes a first electrostatic actuator positioned to operate in the system requiring the long term ON stat...  
WO/2000/039822A1
A method of detecting manual trips and reclose operations in an intelligent electronic device, e.g., electronic trip unit or protective relay, is presented. The intelligent electronic device includes a microcontroller and associated memo...  
WO1999063561A3
A first and a second line (L1, L2) conduct the input direct voltage (Ue) to the load. A fuse (S) is connected in series in the first line. The switching contact (K11) of a first relay (K1) is also connected in series in the first line an...  
WO/1999/063561A2
A first and a second line (L1, L2) conduct the input direct voltage (Ue) to the load. A fuse (S) is connected in series in the first line. The switching contact (K11) of a first relay (K1) is also connected in series in the first line an...  
WO1999047905A3
A vapor or analyte sensing device that is sufficiently small and lightweight to be handheld, and also modular so as to allow the device to be conveniently adapted for use in sensing the presence and concentration of a wide variety of spe...  
WO/1999/054978A1
The invention relates to a differential current protective circuit breaker with a totalizing current transformer (2) monitoring a ladder network (Ln). Said transformer is connected to a power supply unit (8) and a tripping relay (12) for...  
WO/1999/047905A2
A vapor or analyte sensing device that is sufficiently small and lightweight to be handheld, and also modular so as to allow the device to be conveniently adapted for use in sensing the presence and concentration of a wide variety of spe...  
WO/1999/045553A1
High arc currents provoking strong contact erosion in the switching element (3) occur in existing direct current magnet systems when switching from starting excitation to non-drop-out excitation. In order to avoid said inconvenient, a ca...  
WO/1999/034225A1
A compound switching matrix (30) operates in cooperation with a resistance measuring system (20) and a laser (22) to quickly and accurately trim resistors (12) to predetermined values while they are being measured. The compound switching...  
WO/1999/033077A1
The invention relates to an electric switching device with a signalling element which triggers a switching function when the closed circuit is interrupted, a relay safety assembly being switched into the closed circuit. The incoming and ...  
WO/1999/031696A1
A relay controller for an electrical device includes a bistable relay (22) and an electronic controller (20) having a plurality of switching transistors (32-38) for operating the relay (22) in response to commands. Advantageously, the co...  
WO/1999/030837A1
The present invention relates to a glue gun (10) for selectively supply molten adhesive. The glue gun comprises a housing (12), an actuator (16) movable between actuated and non-actuated positions, and a nozzle (18) configured to allow m...  
WO/1999/030338A1
The invention relates to an electromagnetic relay, comprising a magnetic system (6) with an exciting field coil (W¿R?), a core and an armature. Each load current circuit can be closed by a movable contact element and by at least one fix...  
WO/1999/021269A1
The present invention relates to a method and circuit for reducing voltage dips in battery supply lines pertaining to a circuit used to adjust or control the current input of a consumer in a motor vehicle, whereby a consumer current is r...  
WO/1999/013483A1
An electronic switch circuit (10) including an electromagnetic relay device (18) having an electromagnet (20) and at least two contacts (21), a controlled semiconductor device (22), a semiconductor command circuit (24) for controlling th...  
WO/1999/013482A1
A control circuit for relay which can surely stop the welding of the contact of a relay in a short time by impressing an effective shock pulse upon the relay when the welding occurs. In the control circuit, a first driving means (6) is c...  
WO1998055748A3  
WO/1999/010780A1
The invention relates to a method for detecting malfunctions of a first relay (51) whose switching means are series connected to a consumer (11) and interrupt or close down the connection to the consumer depending on the appropriate swit...  
WO/1999/000811A1
For connecting and disconnecting an AC voltage to/from a load (23) via a relay (19) to which an actuator voltage is applied from an actuation circuit, the actuating circuit is connected to a control and measuring circuit (16, 17, 18) whi...  
WO/1998/055748A2
The invention relates to a device for controlling an electromechanical setting device, comprising a final setting element and a setting drive mechanism. Said setting drive mechanism comprises an electromagnet which has a core (112) and a...  
WO1998040898A3  
WO/1998/043266A1
The invention relates to an electromagnetic control device. A control circuit supplies a power element with pulse-width modulated control pulses whose pulse width repetition rate indicates control voltage intensity. The power element app...  
WO/1998/040898A2
A two pole contactor, particularly for a domestic electricity meter, comprising a solenoid with a plunger actuator (24) and a movable contact (16) for each pole mounted on a pivotal blade (14) in a symmetrical opposed configuration. The ...  
WO/1998/039787A1
The invention concerns a current-controlled output stage for electromagnetic actuators with a current controller and a power section, said output stage controlling an electric current fed to an inductive load, for example a magnet coil, ...  
WO/1998/038728A1
A relay circuit is provided for operating a bidirectional dc motor (12) including an H-bridge relay circuit having a first and a second relay (18, 20). The first relay is capable of operatively engaging a first contact at a first time pe...  
WO/1998/038666A1
Electro-mechanical switching devices have at least one movable contact and one pertaining drive mechanism in the casing of an appliance. Means for contactless identification of switching status have already been disclosed, wherein magnet...  
WO/1998/038661A1
The present invention relates to a motor drive for a selective switch, a change-over switch or a moving coil, exhibiting a running-time monitoring function by means of additional mechanical contacts. Two additional monitoring contacts ar...  
WO/1998/038664A1
The invention relates to a modular safety switch (1) which is so designed that various signaling devices (28b) belonging to a set of connectable signaling devices (28b) can be connected thereto. To do this, a typical combination of used ...  
WO/1998/036438A1
A switch for connecting and disconnecting a voltage to a circuit (7) has three terminals. The actuator is adapted to switch a contact spring (4) between two positions (position 1, position 2). Upon connection of voltage to the circuit (7...  
WO/1998/033255A1
A protecting device has a disconnecting contact (13) connected to the load current line (2) and actuated by an electromagnetic system (9). A shunt circuit leads from the side of the disconnecting contact (13) opposite to the battery to a...  
WO/1998/031034A1
The present invention relates to a switching equipment, including relays and/or switch contactors with a magnetic system, the armature and the yoke, a winding and the winding support as well as a control and/or drive system of the switch...  

Matches 601 - 650 out of 12,241