Abstract: A power assisting device for a bicycle generally including an electric generator, an electric motor and a rheostat. The rheostat includes a mount having a first insert and a second insert. Both inserts include upper and lower apertures. Each upper aperture includes a contact, where in a first position the contacts are in contact with one another, and in a second position the contacts are not. The first insert is attached to the brake lever. Applying the front brakes with the braking lever causes the first insert to move from the first position to the second position. The generator is electrically connected to the upper aperture of the first insert, and the motor is electrically connected to the upper aperture of the second insert. When the braking system is not applied, the inserts are in the first position and the contacts are in contact causing an electrical connection between the rheostat, the generator and the motor.

Abstract: A vehicle circuit tester for electrically testing the circuit system of a trailer. The tester can connect to a variety of types of trailers for the purpose of analyzing or monitoring the trailer's circuit system. The tester includes indicators that indicate continuity of the various circuits, thus confirming operability of the trailer lamps. The tester includes wiring connectors in a variety of dimensions and plug configurations, most of which are standardized and widely adopted. As such, the vehicle circuit tester is provided with a plurality of wiring connectors conventionally provided on different sizes and types of trailers. The tester includes probe and ground wires that can be wound up on a reel inside the tester.