Abstract: Open-ended slots in lower ends of bicycle front fork legs receive front wheel axle in usual manner, but to prevent accidental separation of wheel from fork even if regular retaining means on axle became loose, safety means are provided comprising a pair of longitudinally flexible clips mounted at lower ends on axle with retainer means formed integrally therewith at upper ends, and receiver means adjacent lower end of each front fork leg for cooperatively receiving such retainer means, manual flexing of clips being required to effect disengagement of wheel axle from fork.

Abstract: A simple, inexpensive and easily installed bracket securely mounts a bicycle light reflector to the frame of a bicycle. The bracket, particularly suitable for use with a bicycle having caliper brakes, comprises: a slotted mounting portion adapted to be inserted between a cross member for joining bicycle frame portions and a brake arm bridge of a caliper brake mounted to the cross member by means of a center bolt, an upper forked end portion formed integrally with the mounting portion and substantially normal thereto in a forward direction and adapted to overlie the cross member, a lower arcuate cross-section portion formed integrally with the mounting portion and substantially normal thereto and being adapted to extend rearwardly beneath the caliper brake bridge, and an end portion integrally formed with the lower portion remote from the forked end portion and having means for mounting the reflector in substantially vertical position.

Abstract: A bicycle wheel assembly having a safety reflector stably supported between three adjacent spokes parallel to the plane of rotation of the wheel. The reflector has a flat body with retroreflective surfaces on opposite side portions and may, as in the embodiment illustrated, have margins curved to fit the contour of the wheel rim. One of the side portions has a spoke-receiving groove for receiving and fastening to the middle one of the three adjacent spokes. The reflector is positioned in a V-shaped cage defined by the spokes and rim in such a way that the grooved surface of the reflector abuts against a selected spoke. Further, the groove is diagonal in two directions to match the standard, non-radial inclination of the spoke. In the embodiment which is illustrated in the drawings for standard 27 inch wheels, the groove is inclined 7.degree. from the plane of rotation and 5.degree. from a radial line in that plane of rotation and the outer margin is curved along a 121/4 inch radius arc.

Abstract: A hand held tool for testing the sharpness of edges to determine the presence or absence of a safety hazard in which a rotatable mandrel is driven by a torque spring at a specified velocity for a single rotation, the mandrel carrying a covering of testing material which is engaged with an edge to be tested, and having means for automatically driving the mandrel in the presence of predetermined contact force or pressure between the test material and the test edge. Means are also included for adjustably regulating the mandrel speed of rotation and the contacting pressure requisite to effect its testing operation.