165results about "Resistors adjusted by auxillary driving means" patented technology

A ball-and-socket joint with integrated angle sensor for a motor vehicle, especially for the chassis of the motor vehicle is created. The ball-and-socket joint has a ball-and-socket joint housing (6) provided with a joint opening (7), a ball pivot (1) having a joint ball (2) and a pin (3), which is mounted, with its joint ball (2), rotatably and pivotably in a hollow-ball-shaped bearing surface in the ball-and-socket joint housing (6), and projects, with its pin (3), through the joint opening (7) out of the ball-and-socket joint housing (6). A two-pole field transducer (5) is provided at the end of the joint ball (2) facing away from the pin (3). The poles of the field transducer (5) are arranged on the ball surface. In this case, at least two field sensors (13) are arranged at a distance from one another with respect to the meridian plane defined by the large circle on the hollow-ball-shaped bearing surface running at right angles to the bearing longitudinal axis in the area or on the ball-and-socket joint housing (6) facing away from the joint opening, and interact with the field produced by the field transducer (5).

A power stack includes cooling pipes and semiconductor modules which are alternately laminated. Each cooling pipe includes an inside space dissected into cooling passages in which coolant flows. Both surfaces of the semiconductor module in a laminating direction are brought into contact with surfaces of neighboring cooling pipes. The semiconductor modules are classified into a plurality of groups mutually differentiated in their heat generation rates. And, any two semiconductor modules belonging to the same group having the highest heat generation rate are spaced from each other so that a cooling pipe is not sandwiched between these semiconductor modules in the laminating direction.

A dual magnet Hall effect switch for contactless switching is provided. The Hall effect switch includes a magnet carriage and a Hall effect sensor positioned inside a switch housing. The magnet carriage includes two magnets positioned with opposite polarities facing the Hall effect sensor and in contact. When the switch is actuated, the magnet carriage is displaced within the switch housing and relative to the Hall effect sensor. The two magnets positioned inside the magnet carriage are also displaced. The positional displacement of the magnets relative to the Hall effect sensor alters the magnetic field detected by the Hall effect sensor. When the magnetic field detected by the Hall effect sensor reaches a predetermined level, the switch is actuated. The Hall effect switch also includes a boot seal sealing the switch and an internal clicker ball to provide an audible or tactile indication of the switch's actuation.

The invention discloses a device for detecting a secondary virtual loop of an intelligent transformer substation. The input end of a configuration file reading module is connected with the output end of a background of the intelligent transformer substation; the input end of a configuration file analysis module is connected with the output end of the configuration file reading module; a digital signal generator is respectively connected with an intelligent equipment acquisition card and an intelligent operating box; the output end of the intelligent equipment acquisition card is sequentially connected with an intelligent transformer substation combination unit and an industrial switch; the output end of the intelligent operating box is connected with the industrial switch; the output end of the industrial switch is connected with the input end of a photoelectric converter; and the output end of the photoelectric converter is connected with the input end of a virtual loop detection module. The invention also provides a method for detecting the secondary virtual loop of the intelligent transformer substation. The invention has the advantages that the secondary loop connection performance of the whole transformer substation can be comprehensively detected, the motion accuracy of the secondary equipment of the transformer substation is ensured, technical basis is provided for checking, reforming and improvement of a transformer substation automatic system and the secondary equipment, and the safety production and steady operation of a power grid are facilitated.

A sensor for chemical species or biological species or radiation presenting to test fluid a polymer composition comprises polymer and conductive filler metal, alloy or reduced metal oxide and having a first level of electrical conductance when quiescent and being convertible to a second level of conductance by change of stress applied by stretching or compression or electric field, in which the polymer composition is characterized by at least one of the features in the form of particles at least 90% w / w held on a 100 mesh sieve; and / or comprising a permeable body extending across a channel of fluid flow; and / or affording in-and-out diffusion of test fluid and / or mechanically coupled to a workpiece of polymer swellable by a constituent of test fluid.

An electrically adjustable resistor comprises a resistive polysilicon layer dielectrically isolated from one or more doped semiconducting layers. A tunable voltage is applied to the doped semiconducting layers, causing the resistance of the polysilicon layer to vary. Multiple matched electrically adjustable resistors may be fabricated on a single substrate, tuned by a single, shared doped semiconductor layer, creating matched, tunable resistor pairs that are particularly useful for differential amplifier applications. Multiple, independently adjustable resistors may also be fabricated on a common substrate.

In an embodiment of the invention an operating device for a glass ceramic hob (25) can be provided and has an operating unit (11). The operating unit (11) has a rotary toggle (12), which is magnetically mounted on a glass ceramic hob (25). A bearing device (13) below the glass ceramic hob has guide magnets (15), which form a magnetically acting guide link, which permits both a rotary movement (R) and a linear movement (L) of the rotary toggle (12). The rotary toggle (12) has signalling magnets (19) along its outer circumference and with them are associated beneath the hob (25) Hall sensors (21). Further Hall sensors (22) are positioned between the guide magnets (15). A random movement (R, L) of the rotary toggle (12) can be detected with the Hall sensors (21, 22). The operating unit (11) can be removed. The glass ceramic hob (25) requires no openings or the like.

A power tool can have a compact power tool handle. A compact power tool handle can be used in a jigsaw, or any other power tool with a handle. Optionally, the power tool can have a compact power tool handle which has an AC compact variable switch which can control the speed of a motor of the power tool.

The invention discloses a resistance device based on magneto-rheological cement and a magnetic control rheostat. The resistance device based on the magneto-rheological cement comprises an insulating sleeve, electrodes, magneto-rheological cement and wiring ends, wherein the magneto-rheological cement is fixed inside the insulating sleeve; the electrodes are distributed on the upper inner surface and the lower inner surface of the insulating sleeve, and are in sufficient contact with the magneto-rheological cement; and the wiring ends are welded on the two electrodes. The magnetic control rheostat comprises excitation coils, an upper magnetic pole, a lower magnetic pole and the resistance device based on the magneto-rheological cement, wherein the resistance device based on the magneto-rheological cement is fixed between the upper magnetic pole and the lower magnetic pole; the excitation coils are coiled between the upper magnetic pole and the lower magnetic pole; the excitation coils, the upper magnetic pole, the lower magnetic pole and the resistance device based on the magneto-rheological cement commonly form a closed bidirectional magnetic loop; and the intensity of a magnetic field of the closed magnetic loop is adjusted by controlling the magnitude of the current of the excitation coil, so that the resistance of the resistance device based on the magneto-rheological cement can be changed. The invention designs the rheostat for controlling the resistance value of the device by a magnetic field generated by the current through using the characteristic that the conduction property of the magneto-rheological cement can be enhanced by additionally arranging the magneto-rheological cement with the increase of magnetic fields. The magnetic control rheostat is applicable to an electronic control system or a computer control system.

A speed adjustment mechanism for a power tool is disclosed. The mechanism includes a support, a first toothed gear for rotation by means of an adjustment dial, and a second toothed gear rotatable by means of the first toothed gear and connected to a potentiometer which is connected to a speed control circuit. Limited movement of the first and second toothed gears relative to each other is possible to reduce transmission of impacts from the adjustment dial to the speed control circuit.

An actuator and integral position sensor has increased reliability with a fail-safe mode. An electric motor has a shaft. A sensor is mounted to the electric motor. The sensor has a housing and a rotor. The rotor has a bore and first and second recesses. The recesses have different depths. The shaft is engaged with the bore. A first magnet is mounted in the first recess and a second magnet is mounted in the second recess. A magnetic field sensor is mounted adjacent the rotor.

A resistor card for a fuel level sensor has improved resistance to corrosion and wear. The resistor card has a substrate with a resistive layer and a conductive layer. A nickel layer covers the conductive layer. A nickel-gold alloy layer covers the nickel layer. The nickel-gold alloy layer protects the conductive layer from sulfur corrosion and improves wear resistance.

A high voltage resistor comprising an array of a plurality of parallel electrically connected resistor elements each containing a resistive solution, attached at each end thereof to an end plate, and about the circumference of each of the end plates, a corona reduction ring. Each of the resistor elements comprises an insulating tube having an electrode inserted into each end thereof and held in position by one or more hose clamps about the outer periphery of the insulating tube. According to a preferred embodiment, the electrode is fabricated from stainless steel and has a mushroom shape at one end, that inserted into the tube, and a flat end for engagement with the end plates that provides connection of the resistor array and with a load.

A contactless potentiometer includes a shaft and a magnet rotatable together with the shaft and detects a rotational angle of the shaft corresponding to a change in magnetic fields caused by the rotation of the magnet, the magnet being held in a tip end portion of the shaft. The potentiometer includes a cover member attached to a housing at a tip end side of the shaft and arranged to define a closed sensor area between the cover member and the housing, and a circuit board mounted to the cover member at a side of the sensor area in a perpendicular or substantially perpendicular relationship with the shaft. The cover member includes a recess portion arranged on a surface of the cover member facing the circuit board, the recess portion cooperating with the circuit board to define a component-mounting spare space.

The invention discloses a slide rheostat, in particular an electromagnetic control slide rheostat. The electromagnetic control slide rheostat comprises the slide rheostat, a coil, a sliding rod and a sliding sheet, wherein the coil, the sliding rod and the sliding sheet are arranged on the slide rheostat. The electromagnetic control slide rheostat is characterized in that both ends of the sliding rod are respectively provided with electromagnetic control devices; the electromagnetic control devices are connected with a variable frequency power source through leads, and each electromagnetic control device comprises an electromagnet and a transformer which are connected. The electromagnetic control slide rheostat has simple structure and convenient use and can remotely control the sliding of the sliding sheet of the slide rheostat by changing voltage during a physics experiment, thereby regulating the resistance of the slide rheostat connected into a circuit, realizing the automation of electrical elements and bringing the convenience for the experiment.

A plurality of PTC material layers and a plurality of metal plates are sandwiched together with one adjacent pair of metal plates connected in series through one layer of PTC material. The remaining PTC material layers are connected in parallel with the one layer by selectively interconnecting the other metal plates with the one adjacent pair of metal plates.

The invention discloses a motor potentiometer. The motor potentiometer comprises a potentiometer and a servo motor, wherein the servo motor is provided with a servo motor and a controller of the servo motor, the controller comprises a CPU (central processing unit) and a control circuit of CPU, the input end of the potentiometer is provided with a contact which is connected with a micro motor, the inner end of the contact is electrically connected with the control circuit, the power output end of the micro motor is electrically connected with the contact of the potentiometer through the servo motor, an APP application and a wireless communication interface are arranged in the CPU, the wireless communication interface comprises a WIFI (wireless fidelity) and a Bluetooth device interface, the servo motor comprises an electromagnetic speed-changing motor and a micro motor, and the CPU is 313C-2DP. By adopting the motor potentiometer, the potentiometer can be controlled through the wireless and APP application and is convenient to operate.

An electro-optical device includes: a substrate; a plurality of wiring lines which is formed on the substrate; and an IC which is mounted on the substrate so as to be electrically connected to the plurality of wiring lines. At least a pair of wiring lines among the plurality of wiring lines include a first conductive layer formed on the substrate and a second conductive layer formed on at least the first conductive layer. The first conductive layer and the second conductive layer have different resistance values. The first conductive layer of one of the pair of wiring lines has a plurality of first resistors each extending toward the other wiring line, and the second conductive layer of the other wiring line has a second resistor extending toward the one wiring line. The plurality of first resistors is connected to the second resistor.