Anti-slide lock for an actuator pedal

Claim 1

IN A FLOOR MOUNTED FOOT BOARD ASSEMBLY FOR OPERATING A PORTABLE MUSICAL INSTRUMENT, SAID ASSEMBLY INCLUDING A HEEL PLATE FOR FLUSH SUPPORTED ENGAGEMENT UPON A FLOOR SURFACE AND A FOOT PEDAL HAVING A PIVOT CONNECTION TO THE HEEL PLATE AND HAVING A TOE END EQUIPPED WITH FACILITIES FOR ACTUATING SAID INSTRUMENT IN ACCORDANCE WITH MOVEMENT OF SAID FOOT PEDAL, THE IMPROVEMENT WHEREIN SAID HEEL PLATE COMPRISES A HOLLOW BODY OPEN ACROSS ITS LOWER FACE TO DEFINE A DOWNWARDLY OPENING CAVITY BORDERED LATERALLY BY FORE, AFT AND SIDE WALLS, A PIVOT PIN SPANNING SAID CAVITY TRANSVERSELY OF SAID HEEL PLATE AND ENGAGED IN SAID SIDE WALLS AT CORRESPONDING POINTS INTERMEDIATELY THEREALONG, AND A LOCK IN SAID HEEL PLATE AND HAVING A GRIP ESTABLISHING EDGE EXTENDING TRANSVERSELY OF SAID HEEL PLATE, SAID JAW HAVING SIDE PORTIONS PIVOTALLY ENGAGED ON SAID PIN TO CONTROL SWINGING MOVEMENT OF SAID LOCK FROM A CONCEALED INACTIVE POSITION WHEREIN SAID EDGE PROJECTS UPWARDLY WITHIN SAID CAVITY ADJACENT THE FRONT THEREOF TO AN EXPOSED IN-USE POSITION WHEREIN SAID EDGE PROJECTS GENERALLY DOWNWARDLY OF THE HEEL PLATE ADJACENT THE REAR OF SAID CAVITY.