Abstract: An electrically assisted cycle wherein the electrical assistance is provided by an electric drive arrangement carried on the frame of the cycle and powered by a battery also carried by the frame. The output of the drive arrangement is coupled to the driven wheel of the cycle so that operation of the electric drive arrangement can propel the cycle. The drive arrangement is mounted on the frame for limited movement relative to the frame against the action of a resilient bias provided by rubber mounting bushes. An electrical switch is operated by movement of the drive arrangement relative to the frame and the electrical switch is arranged in the energizing circuit of the motor of the electric drive assembly. The switch is operated by movement of the drive arrangement from a rest position to a position wherein the rubber bushes are stressed. Until the switch is so operated the motor cannot be energized.

Abstract: A battery support for an electrically assisted cycle includes a box-like member which is arranged to be secured to alternatively to be incorporated into the frame of the cycle. The box-like member has an open face whereby an electric traction battery can be inserted into the member. A releasable retaining member is carried by the box-like member and has an operative position in which the retaining member extends over the open face of the box member so as to retain the battery therein in use. The electrically assisted cycle utilizing the battery support has the box-like member secured to or incorporated in the frame thereof and the battery carried by the box-like member is associated with an electric motor also carried by the frame of the cycle, electric motor being arranged to assist the rider in propelling the cycle.

Abstract: An electrically assisted cycle including a frame and a ground engaging wheel rotatably mounted on the frame. A drive member is rotatably mounted on the frame and is arranged to be rotated by the rider of the cycle. A chain couples the drive member and the wheel and there is provided an electric motor and an associated battery carried by the frame, the output of the motor being coupled to the wheel so that the motor can propel the cycle; an electrical switch is incorporated into the rider operated drive member and is so associated with the electric motor that the motor cannot be energized unless the switch is operated by the rider applying a driving force to propel the cycle.

Abstract: An electrically assisted pedal cycle including a frame rotatably mounting a ground engaging wheel. A pedal shaft is supported by the frame with its axis extending transverse to the plane of the frame, the shaft being supported for rotational movement and limited axial movement relative to the frame. A coupling is provided whereby rotation of the shaft relative to the frame at least in one direction can be transmitted to the ground engaging wheel to propel the cycle. A screw arrangement is incorporated whereby rotation of the shaft in the one axial direction moves the shaft axially relative to the frame in one axial direction. An electrical switch is operated by such axial movement of the shaft relative to the frame and the electrical switch is associated with an electric motor and associated power source which are carried by the frame to prevent energization of the electric motor until the electrical switch is operated by the axial movement of the shaft.

Abstract: A cycle according to the invention includes a rotatable pedal wheel coupled by a chain to the driving wheel of the cycle. An electric motor and associated power source are carried by the frame of the cycle and are coupled to the rear wheel whereby the electric motor can propel. An electrical switch is operable by tension in the chain resulting from pedalling action by the rider and the switch must be operated in order for the motor to be energized.