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WO/1996/011488A1 |
A line powered supply for a wall mounted lighting load control system includes a power MOSFET in series with a load control relay and a second MOSFET in parallel with the load control relay. When the lighting load is off, the MOSFET in p...
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WO/1995/034754A1 |
Described is a method and device for controlling an electromagnetic consumer which includes a moving element, in particular a solenoid valve, for control of the fuel feed into an internal-combustion engine. Within a particular time windo...
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WO/1995/029498A1 |
An improved economizer for DC actuator coil current control in spring-biased DC actuators is accomplished by control of power from a voltage source Vs to an actuator coil circuit by a chopper circuit (104) incorporating a switch S1 in th...
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WO/1995/028729A1 |
The invention relates to a remote control device for mobile and stationary concrete pumps. The remote control device has a central control device (10) to control groups and signalling units of the concrete pump and a remote control appli...
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WO/1995/022160A1 |
A brake pressure control mechanism for establishing a pressure level in a brake actuator includes a valve controlled by the current in a solenoid coil. The current in the coil is controlled in a first mode by switching the current in the...
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WO/1995/014162A1 |
A system (1) presenting a number of actuator circuits, each including a capacitor (C1), and a first controlled switch (SWi) interposed between the coil of an injector (Li) and a reference line, for permitting supply of the injector (Li) ...
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WO/1995/014304A1 |
This circuit detects ON failure of a switching element for controlling the power supply to a load, and shuts down the load current reliably. The circuit comprises a monitoring sensor which generates an output when energy is externally su...
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WO/1995/013906A1 |
A safety reset device for use together with personal safety protection device comprises two reset channels (1, 2) and a reset switch (3) common to the reset channels. Each reset channel comprises in series a reset circuit (11, 21) genera...
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WO/1995/002254A1 |
A device for preventing welding of the switch contacts of a heavy duty electromechanical relay comprises means (15, 16 and 17) adapted in use for monitoring the voltage supply to the relay coil (2) and detecting low voltage excursions th...
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WO/1995/000966A1 |
Electronic driving components sized to drive switching contactors of a determined power class are generally used. The object of the invention is to create a process and circuitry which allow contactors of different power classes to be dr...
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WO/1995/000960A1 |
A system and method for operating high speed solenoid actuated devices (18) such as electromagnetically operated high pressure fuel injectors require an initial high power boost (21) to start the movement of an armature followed by a med...
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WO/1994/029557A1 |
To improve a garage-door drive unit that has a garage-door operating mechanism equipped with a drive motor (14, 14') and has a control system for the drive motor with a door-function control unit and with a motor starter unit driven by t...
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WO/1994/019816A1 |
In a fluorescent lighting controller, a switching circuit operates to selectively couple a bank of electronic ballasts (36) to an AC power source (34). The switching circuit comprises a pair of relays (RL3, RL4), preferably connected in ...
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WO/1994/017544A1 |
A latching relay control circuit comprising a latching relay pulse generator circuit and a relay coil drive circuit, the latching relay pulse generator circuit receiving relay control signals and relay reset signals. When a relay control...
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WO/1994/015093A1 |
The proposal is for an actuating relay (10) for starting devices of internal combustion engines, the pull-in winding (15) of which is switched on via an auxiliary relay (33). To provide a space-saving economical arrangement and construct...
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WO/1994/008386A1 |
A method is disclosed for regulating the mean current Im in an inductive load (1) controlled to give a variable opening duty cycle. An increase in the controlled period of the switch (3) is generated cyclically and with low recurrence re...
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WO/1994/000322A1 |
The invention concerns circuitry designed to recognize a short-circuit (or a line break) in an inductive circuit (1) connected via a high-resistance filter circuit (3) to a signal-processing circuit (2). The circuitry includes a monitori...
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WO/1993/014506A1 |
A circuit for driving a load wherein the breaking mechanism for breaking a main power supply when a failure occurs is a fail-safe one. The circuit can drive an inductive load, saving power. The circuit also is improved in delay of its op...
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WO/1993/013536A1 |
An outdoor lighting control inludes a photosensor responsive to ambient outdoor light and an alternating current relay with a pair of contacts movable between make and break positions. The relay includes a contact actuating arrangement t...
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WO/1993/008582A1 |
A device for determining the condition of an apparatus which can be in a first and a second condition and is provided with auxiliary contacts (CAO1,...CAF1...) providing binary condition indications according to the current apparatus con...
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WO/1993/007637A1 |
The design of an electronic switch suitable for regulating the current supplied to inductive loads, such as magnetic bearings is disclosed. The electronic switch employs an alternate circuit design which differs from the conventional "H-...
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WO/1993/005412A1 |
A photodetection system and related circuitry designed to sense the intrusion of an opaque object in light plane. The system comprises a SYSTEM microcontroller (1) and a WATCHDOG microcontroller (2), both of which operate an output contr...
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WO/1992/020084A1 |
A control circuit for connecting an electrical consumer appliance to a supply mains during an adjustable pre-determined time interval comprises a relay switch (7) coupled into the supply line (6) to the consumer appliance, the relay coil...
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WO/1992/018999A1 |
A garage door opening and closing apparatus (10) having improved operational safety is diclosed. The apparatus includes a control circuit (101) which responds to a number of input stimuli to generate commands to open and close a garage d...
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WO/1992/012564A1 |
The invention concerns a device for operating electrical equipment, in particular a TV set, a video recorder, stereo equipment, etc. The device is connected up between the mains and the equipment concerned and is characterized by a relay...
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WO/1992/007415A1 |
In a current regulating circuit, the supply current of a field coil is regulated on the basis of a pulsed voltage modulated by a modulator dependently on a set voltage and an actual voltage. A measurement device determines by means of a ...
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WO/1992/007374A1 |
A safety circuit for controlling the energisation of a machine through two contactors connected in series with a power supply for the machine. The safety circuit is arranged when energised to enable closure of main contacts controlled by...
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WO/1991/019312A1 |
An apparatus (100) is provided for precharging a filter capacitor (125) to prevent damage to a set of contacts (115) resulting from arcing across the contacts (115). Included is a coil (110), a set of contacts (115), and a battery (120),...
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WO/1991/015865A1 |
The heavy requirements made of hinged-armature relays for use in motor vehicles, which have to provide increasingly heavier switching powers with high inductive loads, more compact construction and lower losses, can no longer be met with...
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WO/1991/010251A1 |
A driver circuit (10) for an inductive load (12), such as a solenoid winding (16), includes flyback and energization current sensors (28, 40) which respectively sense the current through the coil during flyback and energization. The flyb...
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WO/1991/010250A1 |
An electrically operable power switch (2) is connected between a power supply (3) and a power consuming device (1). A safety circuit (4) is arranged to monitor at least one safety-related condition of the power consuming device (1), the ...
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WO/1991/006968A1 |
An apparatus (16) for dampening current in a coil (22) is provided. A switchable member (28) having "ON" and "OFF" states controls the current level in the coil (22) and a flyback circuit (48) allows current in the coil (22) to slowly di...
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WO/1991/003741A1 |
A system for detecting melt-adhesion of relay to check melt-adhesion of relay contacts. Fully interlocked relays or half-interlocked relays are connected in a number of two to operate under the same conditions, and the melt-adhered condi...
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WO/1991/000634A1 |
A remote control power disconnect circuit for providing a ground fault across an electrical outlet when an unsafe condition such as a lost neutral or shorting of the AC power switch is detected. The remote control power disconnect circui...
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WO/1990/010967A1 |
A solid state circuit protector is comprised of a coil winding (6), a latching type Hall effect device (2), and a solid state switching network including an NPN bipolar junction transistor (10) with a current limiting resistor (4). Other...
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WO/1990/010332A1 |
A protected digital output circuit coupled to a programmable controller, for controlling a load (22) supplied through alternating-current (ac) power lines, including a fuse (14) and a single controlled output switch (10) connected in ser...
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WO/1990/009518A1 |
The invention concerns a circuit arrangement and a process for operating an electromagnetic consumer (1) on a supply voltage (4), with a switching element connected in series to the consumer (1) and an energy-supply circuit (9) which acc...
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WO/1990/007787A1 |
The present invention concerns a contactor (2) for the mutual connection and disconnection of plants and loads as well as a method for controlling the contactor. The contactor (2) comprises a frame (8) of the contactor; an at least two-p...
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WO/1990/007188A1 |
A process for controlling and detecting the movement of an armature of an electromagnetic switching device with an excitation coil comprises the following steps: to move the armature into an operating position, a current (i) or a voltage...
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WO/1990/006237A2 |
A method and apparatus for a two-pulse solenoid embossing system implementing an amplitude feedback circuit, i.e., current monitor (48), to provide precise amplitude and timing control over two current pulses (4, 5), and thereby provide ...
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WO/1990/004715A1 |
A driver circuit (26) for first and second coils (30a, 30c) includes first and second selector switches (36a, 36c) coupled in series between first terminals (32a, 32c) of the coils (36a, 36c) and a first common junction (38), first and s...
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WO/1990/003655A1 |
Electrical switching circuit comprising an electromagnetic relay (20a, 20b) and a bidirectively controlled contactless switch (21), being able to make and break capacitive, inductive or pure resistive loads (22), without forming arcs, an...
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WO/1989/007831A1 |
A circuit arrangement for cyclic supply of an electromagnetic consumer, with a control device actuated by a control signal equal to the difference between the instantaneous signal to the consumer and a given guiding signal, comprises a c...
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WO/1988/003286A1 |
A relay switch (SW) in an AC main line has a DC-powered amplifier (AMP) for applying amplifier control sensor signals to the control circuit of the relay switch. To provide DC power for the amplifier when the relay switch main controlled...
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WO/1988/002544A1 |
A solenoid driver control circuit in which solenoid current is sensed comparator means comprising two separate comparators (24, 25) receives the solenoid current sensed signal (45) and maximum and minimum reference threshold levels which...
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WO/1988/000406A1 |
Reed switches (1) are commonly used for protecting circuits from a predetermined fault. A problem occurs from the tendency of the movable contact (5) of the reed switch to hesitate or hang up between the closed and opened state when expo...
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WO/1987/007347A1 |
For driving the gears of motor vehicles, pressure regulators are used, the inductances of which are triggered by a changeable pulse sequence in order to obtain the desired pressure adjustment. In order to avoid interference in a sure and...
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WO/1987/005662A1 |
Process for controlling the excitation time of electromagnetic systems, in particular electromagnetic valves in internal combustion engines, in which the excitation current i = i(t), based on a high holding current for a specific duratio...
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WO/1987/003548A1 |
An adaptive switching circuit for switching electrical power to a load, such as turn indicator lamps in a motor vehicle. The switching circuit comprises load switching means (17, T3) for conducting electrical power to the load upon actua...
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WO/1987/001765A1 |
A solenoid driver control circuit for use with solenoids, the circuit including a current sense unit (12) for providing a current sense signal and a solenoid drive unit (13) for selectively allowing current to flow through the solenoid (...
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