Units for distributing three-phase power to a plurality of chain motors are provided, as are used to raise and suspend production elements such as lighting, sound, video, and scenery. Remote switching and phase reversal of such power are also provided. In the prior art, such switching has been performed by large, heavy contactors inserted between the single power input and its distribution to plural outputs for motors, making the unit difficult to handle and ship. Provided herein are power switching and phase reversal performed by a plurality of parallel such means, reducing the current requirements for each, and thereby the size, weight, and cost of the whole. In some embodiments, the single power input is replaced by a by a cable delivering a plurality of two-phase circuits to the unit which derives the three-phase circuits necessary for chain motors therefrom.

Units for distributing three-phase power to a plurality of chain motors are provided, as are used to raise and suspend production elements such as lighting, sound, video, and scenery. Remote switching and phase reversal of such power are also provided. In the prior art, such switching has been performed by large, heavy contactors inserted between the single power input and its distribution to plural outputs for motors, making the unit difficult to handle and ship. Provided herein are power switching and phase reversal performed by a plurality of parallel such means, reducing the current requirements for each, and thereby the size, weight, and cost of the whole. In some embodiments, the single power input is replaced by a by a cable delivering a plurality of two-phase circuits to the unit which derives the three-phase circuits necessary for chain motors therefrom.

A system has a hoist system to lift a payload to a position adjacent to a ceiling of a room Image sensor systems collect visual data and payload depth data within the payload and ambient depth data within the room. A controller is connected to the hoist system and the image sensor systems. The controller is configured to control the motion of the hoist system. The motion of the hoist system is controlled in part by the ambient depth data from the room.

A system has a hoist system to lift a payload to a position adjacent to a ceiling of a room Image sensor systems collect visual data and payload depth data within the payload and ambient depth data within the room. A controller is connected to the hoist system and the image sensor systems. The controller is configured to control the motion of the hoist system. The motion of the hoist system is controlled in part by the ambient depth data from the room.

Embodiments of the present disclosure describe methods and apparatuses for a load lifting system.

A winch drum light assembly comprises a bracket having at least one attachment location for attaching the bracket to a vehicle or to a vehicle component that is attached to the vehicle; and a light member for producing light and situated on the bracket, the light member including a power connection adapted for connecting the vehicle's power or an alternative source of power to the light member.

A winch drum light assembly comprises a bracket having at least one attachment location for attaching the bracket to a vehicle or to a vehicle component that is attached to the vehicle; and a light member for producing light and situated on the bracket, the light member including a power connection adapted for connecting the vehicle's power or an alternative source of power to the light member.

A hoist system that includes a hook; a cable connected to the hook; a motor configured to move the hook and the cable; and an overload protection device (OLPD) configured to limit loads imparted on one or more of the hook, the cable, and the motor. The hoist system further includes an overload protection device (OLPD) slip detection system configured to detect activation of the overload protection device (OLPD).

A hoist system that includes a hook; a cable connected to the hook; a motor configured to move the hook and the cable; and an overload protection device (OLPD) configured to limit loads imparted on one or more of the hook, the cable, and the motor. The hoist system further includes an overload protection device (OLPD) slip detection system configured to detect activation of the overload protection device (OLPD).

The invention relates to a drive unit for a construction and/or material handling machine or lifting equipment such as a crane, comprising a torque density of more than 20 Nm/l at a predetermined output speed, wherein the drive unit comprises a drive motor and a connected transmission, wherein a fast-running electric motor is provided as the drive motor, wherein the motor speed thereof is at least two times said output speed of the drive unit and is reduced by the transmission by a factor of at least 2 to the output speed of the drive unit.