A rotor system for a multi-pole rotary electrical switch having a rotor with a top and a bottom. Bus plate connectors are held in chambers on the bottom of the rotor. Retainers in the chambers, engaging only sides of the bus plate connectors, prevent the bus plate connectors from dropping out of the chambers when the bus plate connectors are placed above bus plates in a bus plate holder to place the switch in an “OFF” position. Support members extend from a side of the rotor to support the bus plate connectors above the bus plates. When the rotor is rotated to the “OFF” position the support members are rotated up onto support posts positioned in the bus plate holder. When the rotor is rotated to an “ON” position the support members are rotated off the support posts and the bus plate connectors are pressed down against the bus plates by a spring, thereby creating electrical connections between the bus plate connectors and the bus plates.

A gear structure and a dimmer and speed control switch, wherein the gear structure includes a plurality of positioning grooves and a gear switching component, and the plurality of positioning grooves are sequentially spaced apart on the housing; the gear switching component is movably Installed on the housing, it includes a positioning component and a biasing component connected with the positioning component. The positioning component has a first position that is positioned and matched with the positioning groove and a second position separated from the positioning groove. The biasing component applies a biasing force on position component that moves it toward the first position, the gear structure mentioned above can ensure accurate gear positioning during the operation of the dimmer and speed control switch, and is not prone to misoperate, which is convenient for users, and coordinated positioning grooves and positioning parts have the advantage of simplified structure.

A gear structure and a dimmer and speed control switch, wherein the gear structure includes a plurality of positioning grooves and a gear switching component, and the plurality of positioning grooves are sequentially spaced apart on the housing; the gear switching component is movably Installed on the housing, it includes a positioning component and a biasing component connected with the positioning component. The positioning component has a first position that is positioned and matched with the positioning groove and a second position separated from the positioning groove. The biasing component applies a biasing force on position component that moves it toward the first position, the gear structure mentioned above can ensure accurate gear positioning during the operation of the dimmer and speed control switch, and is not prone to misoperate, which is convenient for users, and coordinated positioning grooves and positioning parts have the advantage of simplified structure.

A switching mechanism for an electrical switch assembly has a rotary switch mounted on a printed circuit board. The rotary switch includes a contact block having a plurality of conductive contact faces arranged in the general shape of a polygon and adapted to roll from one contact face to another as the rotary switch is turned. There is a manually rotatable knob for turning the rotary switch. The knob is mounted on a surface spaced apart from the printed circuit board. A rotatable shaft assembly operatively connects the rotatable knob with the rotary switch so as to allow simultaneous and coordinated turning of the rotary switch when the knob is manually rotated. There is a plurality of conductive terminal contacts mounted on the printed circuit board and upon which the contact block rolls. Each conductive terminal contact is part of a circuit for a separate current flow pathway. Rolling of the contact block on its contact faces selectively opens a circuit and closes an adjacent circuit to allow electricity to flow along a desired current flow pathway.

A switching mechanism for an electrical switch assembly has a rotary switch mounted on a printed circuit board. The rotary switch includes a contact block having a plurality of conductive contact faces arranged in the general shape of a polygon and adapted to roll from one contact face to another as the rotary switch is turned. There is a manually rotatable knob for turning the rotary switch. The knob is mounted on a surface spaced apart from the printed circuit board. A rotatable shaft assembly operatively connects the rotatable knob with the rotary switch so as to allow simultaneous and coordinated turning of the rotary switch when the knob is manually rotated. There is a plurality of conductive terminal contacts mounted on the printed circuit board and upon which the contact block rolls. Each conductive terminal contact is part of a circuit for a separate current flow pathway. Rolling of the contact block on its contact faces selectively opens a circuit and closes an adjacent circuit to allow electricity to flow along a desired current flow pathway.

A switch includes a housing, a common stationary contact terminal, an individual stationary contact terminal, and a plunger including a moving contact unit. The moving contact unit includes a body, a first arm, a second arm, and a third arm extending from the body in a direction intersecting with a parallel direction in which the common stationary contact terminal and the individual stationary contact terminal are arranged parallel to each other, electrically interconnected with each other, and are spaced apart from one another in the parallel direction, a first moving contact included in the first arm, a second moving contact included in the second arm, and a third moving contact included in the third arm.

A switch includes a housing, a common stationary contact terminal, an individual stationary contact terminal, and a plunger including a moving contact unit. The moving contact unit includes a body, a first arm, a second arm, and a third arm extending from the body in a direction intersecting with a parallel direction in which the common stationary contact terminal and the individual stationary contact terminal are arranged parallel to each other, electrically interconnected with each other, and are spaced apart from one another in the parallel direction, a first moving contact included in the first arm, a second moving contact included in the second arm, and a third moving contact included in the third arm.

A tapping arrangement for a transformer, the arrangement comprising a plurality of fixed contacts, a movable rotary contact, a transition rotor with pairs of transition contacts, an interrupter coupling assembly and driving motor(s) are compacted into a single vacuum chamber.