Abstract: A parking brake actuating and release mechanism actuated through a series of strokes of the brake pedal lever to tension the parking brake cable throughout the desired range, the parking brake cable being connected with an eccentric cable take-up member so that the effective leverage applied to the cable causes the mechanical advantage to increase through at least the predominant range of actuation of the mechanism. A release mechanism provides quick release of the parking brake so that it returns to the released position.

Abstract: A vacuum supply system for automotive vehicles having vacuum powered accessories and driven by an engine with an air intake system in which vacuum is developed that may be inadequate to operate the accessories under some conditions. A vacuum pump, which may be engine driven, is connected between the engine and the accessories to supplement the operating vacuum. Flow limiting orifices in a junction connecting with secondary accessories provide for continued operation of a primary accessory such as a vacuum brake booster in spite of the disconnection of a vacuum hose or other massive air leak in one of the secondary accessory lines.