An operating device includes a first operating element with which a user can select one or numerous main functions of a vehicle and that can rotate about an axis of rotation and has at least one predefined fixed rotational position. A second operating element with which a user can adjust subfunctions of the main function can rotate about the axis of rotation and also comprises an actuator unit that comprises a magnetorheological medium configured to exert a retaining force on the second operating element based on a viscosity of the magnetorheological medium. The actuator unit is configured to set the viscosity on the basis of the main function selected with the first operating element, and on the basis of a rotational position of the second operating element.

A menu control device includes a casing and a roller module. The roller module is installed in the casing. The roller module includes a base, an elastic supporting arm, a scroll wheel, an encoder, a switch element and a microprocessor. The elastic supporting arm is connected with the base. The scroll wheel is pivotally coupled to the elastic supporting arm. The encoder is located beside the scroll wheel. The encoder generates an encoding signal in response to the rotation of the scroll wheel. When an external pressing force is applied to the scroll wheel, the elastic supporting arm is swung toward the switch element, and the switch element is triggered to generate a switching signal. The microprocessor performs an item browsing operation on a menu according to the encoding signal. The microprocessor performs an item selecting operation on the menu according to the switching signal.

Brake adjustment dials, systems, and components adjust the brake bias in a vehicle. In one example, a brake bias adjustment dial includes an electronic display, an adjustment mechanism that transfers rotational torque to a shaft, and a rotation prevention feature that compensates the rotation of the adjustment mechanism to maintain the image displayed on the electronic display in a substantially fixed orientation with respect to a mounting.

A wall-mountable load control device may include an illuminated rotary knob for providing a nightlight feature. The load control device may be configured to control an intensity of a lighting load. The load control device may include a yoke adapted to be mounted to an electrical wall box, an enclosure attached to the yoke, a faceplate attached to the yoke and having an opening, a mounting member attached to the yoke, and/or a potentiometer located within the enclosure and having a shaft extending through an opening in the yoke and the opening of the faceplate. The load control device may include a collar attached to the boss of the mounting member and surrounding the shaft of the potentiometer. The mounting member may be configured to conduct light from at least one light source housed within the enclosure to illuminate the faceplate.

A disconnecting switchgear has three mutually exclusive positions II-0-I, with position II energizing the load circuit, position 0 de-energizing the load circuit and position I grounding the circuit, which reduces the electrical risk when interacting with an electrical panel. The switchgear includes a control interconnected with a body, where the control includes a gripping mechanism with an electrical labelling element, an extension mechanism, a locking mechanism and indicator labels; the body includes a group of external electrical conductors or connection terminals, a group of internal electrical conductors or poles, an earth short-circuit electrical conductor, displays of electrical quantities, luminous indicators, and sight glasses for viewing moving poles; electrical conductors and electrical contacts interconnected with a drive shaft and the latter to a power-transmission mechanism.

A wall-mountable load control device may include an illuminated rotary knob for providing a nightlight feature. The load control device may be configured to control an intensity of a lighting load. The load control device may include a yoke adapted to be mounted to an electrical wall box, an enclosure attached to the yoke, a faceplate attached to the yoke and having an opening, a mounting member attached to the yoke, and/or a potentiometer located within the enclosure and having a shaft extending through an opening in the yoke and the opening of the faceplate. The load control device may include a collar attached to the boss of the mounting member and surrounding the shaft of the potentiometer. The mounting member may be configured to conduct light from at least one light source housed within the enclosure to illuminate the faceplate.

In one example, a rotary knob switch includes: a knob head; a fixing mount disposed below the knob head and configured to allow at least a portion of the bottom of the knob head to pass through it; cam located at the bottom of the fixing mount and to be mated with the bottom of the knob head, a side of the cam forming at least one protruding control curved surface; and a slider, said slider being coaxial with the cam, ramp with different heights being provided along edge of the slider, wherein, when the cam rotates, the control curved surface of the cam presses the ramp of the slider, such that the slider slides along axial direction towards the bottom of the rotary knob switch, the knob head comprises an indicator block, the lower part of the indicator block is provided with an axial light guide column.

A connection verifier, including a collar, a circuit board non-rotatably connected to the collar, the circuit board including at least one terminal, a switch rotatably connected to the collar and arranged to contact the at least one terminal, the switch including at least one finger extending in a first axial direction, and an indication device arranged to activate when the switch contacts the at least one terminal.

A portable or handheld jump starting and air compressing apparatus for jump starting a vehicle engine and air inflating an article such as a tire. The apparatus can include a rechargeable lithium ion battery or battery pack and a microcontroller. The lithium ion battery is coupled to a power output port of the device through a FET smart switch actuated by the microcontroller. A vehicle battery isolation sensor connected in circuit with positive and negative polarity outputs detects the presence of a vehicle battery connected between the positive and negative polarity outputs. A reverse polarity sensor connected in circuit with the positive and negative polarity outputs detects the polarity of a vehicle battery connected between the positive and negative polarity outputs.

A cooktop includes a knob assembly controls a heating part. The knob assembly includes: a knob body disposed at a front surface of a control panel and rotating around a rotation shaft extended in a front-rear direction, a light diffusing part disposed at a rear side of the knob body and diffusing light, and a light source part disposed at a rear side of the light diffusing part and including one or more light sources. The light diffusing part includes a light source corresponding part disposed at a position corresponding to one of the light sources, and a thickness of the light diffusing part along a first straight line that passes from a center of the light diffusing part through the light source corresponding part is greater than a thickness of the light diffusing part along a straight line that does not pass through the light source corresponding part.