The present invention relates to a start switch or contact point (10) for rotating electric machines with single-phase power supply, having a base (100) bearing actuating arms (200) carrying conductive blades (300). The actuating arms (200) are independent and one-piece, each one carrying at least one conductive blade (300) and being pressed against a stop (220) by a resilient element (400), also including a sliding surface (230) with a friction-reduction region (235). The present invention also relates to an electric machine provided with a corresponding start switch or contact point.

The present invention relates to a start switch or contact point (10) for rotating electric machines with single-phase power supply, having a base (100) bearing actuating arms (200) carrying conductive blades (300). The actuating arms (200) are independent and one-piece, each one carrying at least one conductive blade (300) and being pressed against a stop (220) by a resilient element (400), also including a sliding surface (230) with a friction-reduction region (235). The present invention also relates to an electric machine provided with a corresponding start switch or contact point.

A color-changeable alloy wheel of a vehicle has an electrochromic paint deposited on the alloy wheel, so that a color of the alloy wheel changes according to a rotational speed thereof. The color-changeable alloy wheel includes: the electrochromic paint deposited on an outer side surface of the alloy wheel, and a current supplied from a battery of the vehicle to the alloy wheel when the rotational speed of the alloy wheel is higher than a predetermined speed, in order to change the color of the alloy wheel.

A color-changeable alloy wheel of a vehicle has an electrochromic paint deposited on the alloy wheel, so that a color of the alloy wheel changes according to a rotational speed thereof. The color-changeable alloy wheel includes: the electrochromic paint deposited on an outer side surface of the alloy wheel, and a current supplied from a battery of the vehicle to the alloy wheel when the rotational speed of the alloy wheel is higher than a predetermined speed, in order to change the color of the alloy wheel.

Techniques for mechanical calibration of turbine overspeed trip are described. An electric motor rotates a rotational electric motor shaft coupled to an over speed trip collar of a rotational shaft of an electric machine at multiple rotational speeds. The over speed trip collar is configured to trip in response to the rotational electric motor shaft being rotated at a particular rotational speed. The over speed trip collar triggers an alarm when a rotational speed of the multiple rotational speeds substantially matches the particular rotational speed. The alarm provides a signal in response to triggering the alarm.

An electrical switch for an electric machine includes body, a stator fixedly secured to the body and a rotor. The actuator includes a first member securable to the rotor and rotatable with it. The actuator also includes a second member, a first electrically conductive member cooperates with the second member. The actuator also includes a second electrically conductive member. The second electrically conductive member is spaced from said first electrically conductive member when said first electrically conductive member is in the first axial position and electrically engaged with said first electrically conductive member when said first electrically conductive member is in the second axial position.

An electrical switch for an electric machine includes body, a stator fixedly secured to the body and a rotor. The actuator includes a first member securable to the rotor and rotatable with it. The actuator also includes a second member, a first electrically conductive member cooperates with the second member. The actuator also includes a second electrically conductive member. The second electrically conductive member is spaced from said first electrically conductive member when said first electrically conductive member is in the first axial position and electrically engaged with said first electrically conductive member when said first electrically conductive member is in the second axial position.

Disclosed are a gyroscope and a charging device. The gyroscope includes: a casing, a motor, a circuit board and at least two tilt switches. The casing is provided with a rotation axis, the motor is fixedly mounted on the casing, an output shaft of the motor is coaxial with the rotation axis, an end of the output shaft away from the motor is located outside the casing, and the casing is rotatable around the rotation axis with the end of the output shaft away from the motor as a fulcrum. The circuit board is provided with a power supply and a current amplification circuit, the motor is connected to the power supply through the current amplification circuit. The at least two tilt switches are connected in series to the current amplification circuit for jointly controlling an on/off of the current amplification circuit.

The present invention relates to a start switch or contact point (10) for rotating electric machines with single-phase power supply, having a base (100) bearing actuating arms (200) carrying conductive blades (300). The actuating arms (200) are independent and one-piece, each one carrying at least one conductive blade (300) and being pressed against a stop (210) by a resilient element (400), also including a sliding surface (230) with a friction-reduction region (235). The present invention also relates to an electric machine provided with a corresponding start switch or contact point.

The present invention relates to a start switch or contact point (10) for rotating electric machines with single-phase power supply, having a base (100) bearing actuating arms (200) carrying conductive blades (300). The actuating arms (200) are independent and one-piece, each one carrying at least one conductive blade (300) and being pressed against a stop (210) by a resilient element (400), also including a sliding surface (230) with a friction-reduction region (235). The present invention also relates to an electric machine provided with a corresponding start switch or contact point.