GB210911A - Improvements in or connected with brakes or retarding apparatus - Google Patents

Abstract

210,911. Lea, J. C. Chater-. Nov. 25, 1922. Brake mechanism.-Relates to rim brakes of the kind comprising pivoted levers or arms carrying the brake blocks or the like, the arms being used to apply and withdraw the brake blocks by an intermediate wedge-shaped device interposed between them, and consists in the provision of adjustable means for securing the actuating device to Bowden wire or other operating mechanism, and of guiding means for the holders carrying the brake blocks. The levers a are pivoted between their ends on a common fulcrum c and carry at their lower ends holders d for shoes c. The upper ends are formed with cam surfaces f adapted to be engaged by the wedge-shaped surface of a saddle member h which is moved downwardly to apply the brakes, which are normally held off by a single spring g coiled around the pivot bolt c. The member h is provided with side checks embracing the ends of the arms. In one form the inner member of a Bowden wire is passed downward through the member hand anchored to the bolt c, the member h being moved by the outer member m of the Bowden wire engaging an adjustable stop n carried by the saddle member h. The pivot pin c is adjustably secured to its support, and the clamps or holders d may be adjustably secured to the lever arms. In another form an operating rod passes through the member h and is adjustably secured to it by a locking nipple and nut. The holders d may be slotted at r and secured by bolts and nuts s, v to the arms a. The tongues w formed on the holders may be bent to contact with the blades of the wheel fork. In a modification, pins on the holders slide in arcuate slots formed on clips carried by the wheel fork.