Slack adjusters for vehicle brakes

Claim 1

IN COMBINATION WITH A ROTATABLY MOUNTED VEHICLE BRAKE CAM SHAFT, A VEHICLE BRAKE SLACK ADJUSTER COMPRISING A LEVER MOUNTED FOR FREE ROTATION ABOUT THE AXIS OF SAID CAM SHAFT AND HAVING A HOUSING PORTION PERIPHERALLY SURROUNDING A SECTION OF SAID CAM SHAFT, A BRAKE ACTUATING MEMBER OPERATIVELY CONNECTED TO SAID FIRST LEVER FOR ROCKING SAID LEVER ABOUT THE AXIS OF SAID CAM SHAFT, A FIRST SHAFT JOURNALLED IN SAID HOUSING PORTION FOR ROTATION ABOUT AN AXIS EXTENDING AT RIGHT ANGLES TO THE ROTATIONAL AXIS OF SAID CAM SHAFT, A FIRST WORM RIGID WITH SAID FIRST SHAFT, A FIRST WORM WHEEL RIGID WITH SAID SECTION OF SAID CAM SHAFT AND CONSTANTLY MESHING WITH SAID FIRST WORM IN SAID HOUSING PORTION, SAID FIRST SHAFT HAVING AN ENDEXTENDING BEYOND SAID HOUSING PORTION, A HOUSING SECTION RIGID WITH SAID HOUSING PORTION AND RECEIVING SAID END OF SAID FIRST SHAFT, A SECOND SHAFT JOURNALLED IN SAID HOUSING SECTION FOR ROTATION ABOUT AN AXIS EXTENDING AT RIGHT ANGLES TO THE ROTATIONAL AXIS OF SAID FIRST SHAFT, A SECOND WORM RIGID WITH SAID SECOND SHAFT IN SAID HOUSING SECTION, A SECOND WORM WHEEL CONSTANTLY MESHING WITH SAID SECOND WORM IN SAID HOUSING SECTION AND BEING FIXED TO SAID FIRST SHAFT, ONE END OF SID SECOND SHAFT EXTENDING BEYOND SAID HOUSING SECTION, A CASING FORMED SEPARATELY OF SAID HOUSING PORTION AND SAID HOUSING SECTION AND RECEIVING SAID ONE END OF SAID SECOND SHAFT, A ROTCHET WHEEL FIXED ON SAID SECOND SHAFT IN SAID CASING, A PAWL PIVOTALLY MOUNTED IN SAID CASING, MEANS RESILIENTLY BIASING SAID PAWL INTO OPERATIVE ENGAGEMENT WITH SAID RATCHET WHEEL, AND MEANS FOR RESTRAINING SAID CASING AGAINST MOVEMENT WITH SAID LEVER, SAID PAWL COOPERATING WITH SAID RATCHET TO PROVIDE A CLUTCH FOR IMPARTING UNIDIRECTIONAL ROTATION TO SAID FIRST WORM THROUGH THE DRIVE CONNECTION OF SAID SECOND WORM AND SECOND WORM WHEEL WHEN A PREDETERMINED DEGREE OF MOVEMENT OF SAID LEVER IS EXCEEDED.