Abstract: An electrically assisted cycle, particularly but not exclusively a pedal bicycle or tricycle, wherein there is provided an electric motor which can assist the rider in propelling the cycle, the frame of the cycle supporting batteries for powering the motor. In order that the rider can only obtain electrical assistance there is provided a sensing arrangement for sensing the speed at which the chain wheel of the pedal assembly of the cycle is being rotated. The sensing means controls operation of an electrical switch in turn controlling energization of the motor. Thus, in order for the motor to be energized the rider must be rotating the pedals at a speed in excess of a predetermined speed.

Abstract: A gear selector for use on an electrically assisted cycle includes a body which is arranged to be secured to the frame of the cycle. A lever is movable manually relative to the body and is arranged to be connected to the gear mechanism of the cycle whereby movement of the lever relative to the body causes operation of the gear mechanism to change the gear ratio. A cam is movable with the lever and a cam follower engages the cam and is moved thereby. An electrical switch carried by the body and operated by movement of the cam follower, and the cam is such that the cam follower is moved to operate the switch during any movement of the lever to effect a change in gear ratio. The cam is also such that the switch is returned to its initial operative condition after the movement which effects the gear change. In an electrically assisted cycle utilizing such a gear selector mechanism the switch controls energization of the electric motor such that the motor is not energized during gear change operations.