Abstract: A bicycle brake device for increasing the braking power to be applied to the wheel of a bicycle which has caliper type brake arms mounted on the seat stay bridge by a bolt about which the caliper arms are pivotally movable. A cage is mounted on the ends of the caliper arms and has an open end and a closed end. A brake shoe is slidably carried for axial movement in the cage through the open end and has a front end and a rear end oriented with the open and closed end respectively of the cage. A brake block is carried in the brake shoe and has a surface for engaging the rim to apply friction forces for braking action. A cam is mounted at the front end of the brake shoe for engaging the seat stay upon forward sliding movement of the brake shoe in the cage as a result of friction forces between the brake block and the rim when the block engages the rim.

Abstract: An arrangement for supporting a reflector on a bicycle includes a special washer and a reflector attaching bracket, the washer and bracket are held between a brake unit and a front fork crown or a seat stay bridge by a center bolt. The special washer is provided with a hole for allowing the center bolt to penetrate therethrough and, on one face thereof, a concave surface is formed complementary to a curved surface on the front fork crown or a seat stay bridge. A lapping portion of the reflector attaching bracket which is brought into contact with the special washer is provided with a cut-out space for allowing the center bolt to penetrate therethrough and the lower end of the same is formed into a folded end adapted to catch the lower edge of the special washer. This makes it possible to assemble the reflector attaching bracket without making any changes in a conventional brake unit, front fork and frame.

Abstract: To prevent the detachment of the front wheel of a bicycle from the front fork formed of a pair of laterally spaced fork arms each having a free end with an open ended slot arranged to receive the hub spindle of the front wheel which is secured to the front fork by washers and hub nuts, the slot is shaped to have at least one portion which is positioned at the place occupied by the hub spindle when it is assembled within the front fork, that is, at the back of the slot, and which is wider than the diameter of the hub spindle and the washer is provided with a hole arranged to receive the hub spindle therein and at least one projection extending from one of its faces along the periphery of the hole. The projections are fitted into the widened portions of the slots so that even though the nuts securing the front wheel to the front fork become loose, the projections of the washers are retained in the corresponding slots in the front fork preventing the detachment of the front wheel.