Electrically assisted cycle

An electrically assisted cycle including a frame, a ground engaging wheel, means rotatably mounting the ground engaging wheel on the frame, a rotatable drive member, means rotatably mounting the drive member on the frame, means whereby a rider of the cycle can rotate said rotatable drive member relative to the frame, an endless non-extensible flexible member coupling the drive member and the wheel whereby rotation of the drive member propels the cycle, an electric motor, means mounting the electric motor on the frame, a battery support including a box-like member secured to or incorporated in the frame, the box-like member being open at one face and receiving therein an electric storage battery, the battery support further including a releasable retaining member carried by the box-like member to retain the battery therein in use, said electric motor having an output member coupled to said ground engaging wheel whereby the motor can propel the cycle, means electrically connected said electric storage battery to said electric motor said means incorporating a first electrical switch whereby the electrical circuit between the motor and the battery can be made and broken, and, a key operated mechanism incorporating first locking means associated with said battery retaining member whereby said retaining member can be locked in said operative position so that the appropriate key is required to release the retaining member to remove the battery, and said key operated mechanism further including a latch bolt arranged to lock a movable part of the cycle against movement so as to inhibit unauthorised use of the cycle, said latch bolt being movable by operation of the appropriate key in said key operated mechanism.