Shoe retracting mechanism

Claim 1

A DRUM BRAKE COMPRISING: A BACKING PLATE INCLUDING SUPPORT LEDGES, A PAIR OF FRICTION-MATERIAL-LINED ARCUATE T-SECTION BRAKE SHOES SLIDABLY SUPPORTED ON SAID LEDGES AND HAVING ADJACENT ENDS, ACTUATING MEANS DISPOSED BETWEEN EACH OF SAID ADJACENT ENDS, ANCHORING MEANS DISPOSED BETWEEN EACH OF SAID ADJACENT ENDS, AN OPENING IN THE WEBS OF EACH OF SAID SHOES ADJACENT EADN END THEREOF, FOUR LEVERS EACH OF WHICH IS TRANSVERSELY RECEIVED THROUGH A RESPECTIVE OPENING, EACH OF SAID LEVERS HAVING A CURVED PROTUBERANCE DEFINIG A BEARING ENGAGING THE WALL OF ITS RESPECTIVE OPENING, SAID BACKING PLATE HAVING RETAINING MEANS RECEIVING ONE LEVER END OF EACH OF SAID LEVERS, SAID RETAINING MEANS COMPRISING AN APERTURE FOR EACH OF SAID ONE LEVER ENDS, EACH OF SAID ONE LEVER ENDS COMPRISING A ROUND BOSS ENGAGING THE UNDERSURFACE EDGE OF ITS RESPECTIVE APERTURE FOR PIVOTAL MOVEMENT THERAT, EACH LEVER HAVING A SECOND LEVER END PROJECTING FROM SAID SHOE WEB IN A DIRECTION AWAY FROM SAID BACKING PLATE, AND FOUR RETURN SPRINGS EACH OF WHICH IS FASTENED IN TENSION BETWEEN A RESPECTIVE SECOND LEVER END AND A STATIONARY PART OF THE BRAKE, WHEREBY A RETRACTILE FORCE IS IMPARTED THROUGH SAID BEARINGS TO SAID SHOES URGING EACH SHOE TO ITS RETRACTED POSITION DEFINED BY ENGAGEMENT WITH SAID ANCHORING MEANS.