A block heater cord extender features a frame for mounting to a vehicle, a female electrical socket carried on the frame for receiving a male plug of the vehicle's block heater cord, and an extendable/retractable arm having a proximal end movably mounted to the frame. The arm is extendable and retractable in length, and carries an electrical plug at its distal end for mating with a mains power electrical outlet. Circuitry of the extender includes a wireless transmitter arranged activated by the mains power supply when the extender is plugged in. The transmitter sends a signal to a separate warning unit placed inside the vehicle, which reminds a vehicle operator to unplug the extender before driving away.

A block heater cord extender features a frame for mounting to a vehicle, a female electrical socket carried on the frame for receiving a male plug of the vehicle's block heater cord, and an extendable/retractable arm having a proximal end movably mounted to the frame. The arm is extendable and retractable in length, and carries an electrical plug at its distal end for mating with a mains power electrical outlet. Circuitry of the extender includes a wireless transmitter arranged activated by the mains power supply when the extender is plugged in. The transmitter sends a signal to a separate warning unit placed inside the vehicle, which reminds a vehicle operator to unplug the extender before driving away.

An apparatus for transmission of electricity by conduction to a vehicle while in motion.

An apparatus for transmission of electricity by conduction to a vehicle while in motion.

A slidable current collector has an array of terminals with carbon brushes for contacting conductor rails to deliver electrical power to a moving work machine. The terminals have upper sections with a conductive post, lower sections that include a reservoir of liquid metal, and bladders that connect the upper sections with the lower sections. Magnets surround outer shells of the terminals. Fluid above a threshold pressure fed into the bladders holds the upper sections apart from the lower sections and forces the magnets away from the conductor rails. Fluid below the threshold pressure allows the magnets to clamp the terminals to the conductor, lowers the conductive post into the liquid metal, and urges the carbon brushes against the conductor rails. The bladders provide a fluid suspension distributed across the array of terminals, enabling consistent electrical contact and wear for the carbon brushes.

A slidable current collector has an array of terminals with carbon brushes for contacting conductor rails to deliver electrical power to a moving work machine. The terminals have upper sections with a conductive post, lower sections that include a reservoir of liquid metal, and bladders that connect the upper sections with the lower sections. Magnets surround outer shells of the terminals. Fluid above a threshold pressure fed into the bladders holds the upper sections apart from the lower sections and forces the magnets away from the conductor rails. Fluid below the threshold pressure allows the magnets to clamp the terminals to the conductor, lowers the conductive post into the liquid metal, and urges the carbon brushes against the conductor rails. The bladders provide a fluid suspension distributed across the array of terminals, enabling consistent electrical contact and wear for the carbon brushes.

A wiring duct plug that does not have a movable part for switching and thus has a higher operational reliability is provided.

A plug (wiring duct plug) 2 for use mounted in a wiring duct, in which a plurality of conductive lines are installed, comprises a rotatable rotator 17, a pair of non-movable electrode terminals 2a-c and 2d, and a plurality of movable electrode terminals 2a to 2d. The plurality of movable electrode terminals 2a to 2d rotate with the rotator 17 and are placed either at a connection position for electrically coupling the plurality of conductive lines and the pair of non-movable electrode terminals 2a-c and 2d, or at a release position for releasing electrical connection. At the connection position, among the plurality of movable electrode terminals 2a to 2d, the plurality of movable electrode terminals 2a to 2c whose number of terminals is one or more less than the number of the conductive lines respectively connect to conductive lines whose number of lines is one or more less than the conductive lines, and are joined into one at the base end portion and coupled to the one non-movable electrode terminals 2a-c. The remaining movable electrode terminal 2d couples the remaining conductive line to the other non-movable electrode terminal 2d.

A connection system for electrically connecting a fixture in a vehicle has at least one cable, and a housing with a cable inlet and a cable outlet, and with a receiving space which is formed in the housing and extends helically along a housing axis with a receiving space cross section from the cable inlet towards the cable outlet. The cable has a cable cross section and runs completely through the receiving space from the cable inlet towards the cable outlet, with cable coils being formed. A radial extent of the cable cross section is smaller than a radial extent of the receiving space cross section. Therefore, different lengths of the at least one cable can be accommodated in the receiving space with different coil diameters being formed.

A contact device for transmitting electrical energy from a preferably spatially fixed busbar to a tap-off bar, movable along the busbar, including: at least one connecting housing, the busbar being mechanically connected to the tap-off bar by connecting housing, at least one combi clip, the combi clip brought into engagement with part of the outer periphery of the connecting housing in a mechanically releasable manner and establishing a mechanical connection between the connecting housing and a connecting bracket.

A contact device for transmitting electrical energy from a preferably spatially fixed busbar to a tap-off bar, movable along the busbar, including: at least one connecting housing, the busbar being mechanically connected to the tap-off bar by connecting housing, at least one combi clip, the combi clip brought into engagement with part of the outer periphery of the connecting housing in a mechanically releasable manner and establishing a mechanical connection between the connecting housing and a connecting bracket.