187 results about "Stepping switch" patented technology

A pusher formed of a rubber material, a click plate, a membrane switch which serves as a second step switch, a reinforcing plate, a membrane sheet on which a plurality of first step switches are formed, a key operation base and a knob are sequentially assembled into a case. The knob includes a plurality of depressing pieces having on its internal surface a projection which moves into contact with each membrane switch and also includes a marginal portion which is supported by the top surface of the case. The knob is thin-walled except for the depressing piece, and the thin-walled portion comprises a thermoplastic elastomer or silicone rubber. The knob, the key operation base and the reinforcing plate are secured together. As the depressing piece is depressed, the thin-walled portion which is located therearound becomes flexed, whereby the membrane switch is depressed by the projection to turn the switch on. When the depressing piece is further depressed, the reinforcing plate moves and the click plate reverses, turning the switch on.

A method of operating an internal combustion engine including the steps of detecting, determining, and switching. The detecting step detects a load on the engine. The determining step determines if the load is below a predetermined value. The switching step switches the engine to operate at a selected one of a plurality of torque power curves, dependent upon the determining step.

The invention relates to a permanent magnetism mechanism, which comprises an upper case body and a lower case body, wherein, a movable core is arranged between the upper case body and the lower case body; the upper part of the movable core is provided with three upper guide levers. Both sides of the upper guide lever positioned at the middle are provided with a tripping spring and a tripping spring adjusting screw. The upper part of the upper guide lever is provided with an insulator and a contact spring. The position where the lower part of the movable core corresponds to the upper guide lever is provided with a hand trip gear, and both sides of the movable core are provided with a closing coil and a permanent magnet. The invention has the advantages that linear drive is realized on a three step switch tube and the synchronicity and the operability of the three step action are more reliable; the adjustment of the speed of a trip also can be realized; the structure is simple; the cost is low. The invention can be widely used for a breaker and a contactor of a mine feed system, and the environment of the mine feed system is vile, and the mine feed system has high requirement for the reliability. Because the invention only adopts one closing coil, the space of the closing coil is increased. The number of turns of the closing coil can be increased on the premise that the coil diameter is the same or greater than the diameter of the primary coil. The invention can realize frequent electrification for a long time and can not be burnt under the condition that ampere-turn is invariable or the ampere-turn is properly enhanced.

The invention discloses a hydraulic retarder control system and a control method. The control system comprises a magnetic exchange valve controlling a hydraulic retarder. The control system further comprises a hydraulic retarder stepping switch, a control box, a compressed air pipeline, a vehicle auxiliary loading air chamber and a heat exchanger. The control box is connected to the stepping switch of the hydraulic retarder, and the stepping switch provides working signals for the control box. The magnetic exchange valve is connected to the control box, and the control box sends control commands to the magnetic exchange valve. The magnetic exchange valve is connected to the compressed air pipeline. By employing the hydraulic retarder control system, oil can be rapidly charged and discharged for the hydraulic retarder, and the oil charging rate of the hydraulic retarder can be continuously adjusted according to retarding requirements, thereby bringing high reliability and convenient control.

A method of operating an internal combustion engine including the steps of detecting, determining, and switching. The detecting step detects a load on the engine. The determining step determines if the load is below a predetermined value. The switching step switches the engine to operate at a selected one of a plurality of torque power curves, dependent upon the determining step.

A three ¿C range DC potential difference meter with four measuring discs and applying transposition branch is composed of four measuring discs as 20x 2 omega, 10x 0.22 omega, 9x 0.44 omega and 10x 0.044 omega. It features that all measuring resistances are directly connected by conducting wire to exclude contact resistance and variation from measuring ¿C stepping switch out of measuring result and integer power of one or two digit number multiplying by ten is used as value of resistance being used for range changeover.

The invention relates to a stepping switch comprising vacuum switching tubes. The general inventive concept consists in providing one or more cam disks which have profiled circumferential contours both on the upper or lower face as well as on the lateral face, said contours being in the shape of cams for example, so that the vacuum switching tubes can be actuated by both the profiled circumferential contour of the lateral face as well as by the contour of the upper or lower face.

The present disclosure is directed towards a dosing unit (100) for an ambulatory infusion system, including: - a metering pump unit (110), the pump unit including a dosing cylinder (112) and a piston (111), the piston (111) being arranged in sealing sliding engagement inside the dosing cylinder (112); - a valve unit (120), the valve unit (120) having a filling port (127b), the filling port being designed for fluidic coupling with a liquid drug reservoir (300), a draining port (127c), the draining port (127c) being designed for fluidic coupling with an infusion site interface (890), and a shut-off body (126), the shut-off body (126) being movable between a filling position where it fluidic couples the filling port (127b) with the dosing cylinder (112) and an alternative draining position where it fluidic couples the dosing cylinder (112) with the draining port (127c); - a valve driver coupler (125), the valve driver coupler (125) being coupled to or integral with the shut-off body and being the output element of a step switching mechanism. The disclosure is further directed towards a drive unit that may be used in combination with a disclosed dosing unit, an ambulatory infusion system and a method for coupling a dosing unit and a drive unit.

The invention relates to a stepping switch with vacuum switching tubes (22) according to the preamble of the first claim. According to the invention, the general inventive concept consists in providing a second cam disc (3) which is rotationally fixed to the driveshaft (1) in addition to the first cam disc (2) which is rotationally fixed to the driveshaft (1) and which is known from the prior art for applying the force of the opening stroke of the contact system of the vacuum switching tubes (22). The second cam disc exerts a sufficiently high closing force onto the movable follower of the vacuum switching tubes (22) via a spring-lever system provided on the rocker arm arrangement (6) even in the event of a short-circuit stress and additionally allows a tolerance compensation of the contact system.

The invention provides a potentiometer with four measuring discs and diverting branch three range switching for voltage measurement, which is equipped with three measuring ranges, and comprises four measuring discs of 20X10 Omega, 10X1.1 Omega, 9X2.2 Omega, 10X0.22 Omega, all the measuring resistors are connected with wires, the invention can eliminate the contact resistance and variation difference of the step switch from the measurement result, thus good repeatability can be achieved even the minimum resolution is 0.1 uV, according to the invention, the resistance for range switching is the arithmetic product of a uni-digit or bi-digit and the integral power of 10.