<p>1. An indirectly-acting compressed-air brake comprising : A main air line (11) and a driver's brake valve having a pressure controller (16) and a main control valve (14) for increasing and reducing the pressure in the main air line (11) and elements for producing a brake-jump and a release-jump characterised in that the elements (18, 24) for producing said brake-jump and said release-jump having a hysteresis for producing a small release-jump and a large braking-jump.</p>
