Abstract: In a disc brake of the kind in which the clamping member straddling the disc consists of pressure plates located on opposite sides of the disc and interconnected at their outermost ends by draw-bars, each draw-bar is provided at one end with a threaded portion and the threaded portions are passed through spaced clearance bores in the pressure plate to which those ends of the draw-bars are to be connected. The pressure plate is clamped between pairs of axially spaced nuts screwed onto the threaded portions.

Abstract: An automatic slack adjuster for a vehicle brake linkage comprising a housing constituting a lever in the linkage, and the lever is angularly movable about the axis of a shaft to impart to the shaft a brake-applying rotary movement which it transmits to it through a meshing worm and worm wheel assembly. Automatic worm driving means are incorporated for rotating the worm for adjustment of slack in the linkage in response to relative movement between the lever and a relatively stationary part, and the worm driving means incorporates a connection having a degree of lost-motion equivalent to a desired braking clearance, and a spring-loaded clutch of the multi-plate type disposed between the worm and a slidable pawl connected to the stationary part. The clutch includes primary clutch plates and secondary clutch plates with each secondary clutch plate being provided with a tooth, and all the teeth being received in a common notch in the pawl.

Abstract: In a disc brake of the kind in which the clamping member straddling the disc consists of pressure plates located on opposite sides of the disc interconnected at their outermost ends by draw-bars, each draw bar is provided at at least one end with a screw-threaded portion which is screwed into an open-ended screw-threaded bore in a member and a releasable coupling is provided between the member and the one end of the draw bar.