IMPROVEMENTS IN INTERNAL SHOE-DRUM BRAKES AND AN ADJUSTER FOR THE SHOES OF THE BRAKES

摘要

An internal shoe-drum brake incorporates a flexible inextensible cable acting between shoe-engaging separable tappets of an actuator, and the cable transmits relative movement between the tappets to a slack adjuster to store energy in a spring embodied in the adjuster when the brake is applied. The slack adjuster is of the differential thread type and acts between adjacent non-actuated shoe-ends. The effective length of the adjuster can be increased to compensate for wear of the shoe linings when the energy stored in the spring is released at the termination of a brake application.