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Claim 1

A QUICK OPERATED RELEASABLE LOCKING DEVICE ADAPTED TO TIGHTLY SECURE A FIRST PART IN ABUTTING RELATIONSHIP AGAINST A SECOND PART, AND COMPRISING AT LEAST ONE OUTWARDLY PROJECTING LUG RIGID WITH SAID FIRST PART AND HAVING AT LEAST ONE BEARING EDGE FACING AWAY FROM SAID SECOND PART AND FORMED WITH A CURVED RECESS AND A FLAT SEATING PORTION SPACED FROM SAID RECESS AND SUBSTANTIALLY PERPENDICULAR TO SAID FIRST PART, RESTRAINING MEANS CONSISTING OF A LATERALLY PROJECTING DOUBLE-SIDED FLANGE MEMBER SECURED TO SAID SECOND PART AND FORMED WITH AN OPENING THERETHROUGH, A SWING DOG BOLT HAVING A SHANK EXTENDING FREELY THROUGH SAID OPENING FORMED IN SAID FLANGE MEMBER, A TOGGLECLAMP LEVER FORMED WITH AT LEAST ONE ECCENTRIC CAM MEMBER PIVOTALLY SECURED AT ITS CENTRAL PORTION THROUGH AN INTERMEDIATE LINK MEMBER TO THAT END OF SAID DOG BOLT WHICH IS TOWARDS SAID LUG, SAID CAM MEMBER BEING FORMED AT ONE END WITH AN ORIFICE AND AT ITS OPPOSITE END WITH AT LEAST ONE CONVEX ROUNDED PROJECTION AND ONE FLAT COUNTERSTOP PORTION SPACED FROM EACH OTHER AND ADAPTED TO ENGAGE IN MATCHING RELATIONSHIP SAID CURVED RECESS AND SAID SEATING PORTION OF SAID LUG RESPECTIVELY AT POINTS LYING ON OPPOSITE SIDES OF THE LONGITUDINAL AXIS OF SAID SHANK IN THE LOCKED POSITION THEREOF WHEREAS SAID PIVOTAL CONNECTIONS OF SAID CAM AND SHANK ARE SUBSTANTIALLY ALIGNED AT RIGHT ANGLES TO SAID SEATING PORTION, AN ADJUSTABLE ABUTMENT MOUNTED ON SAID SHANK NEAR ITS OPPOSITE FREE END ON THE OTHER SIDE OF SAID FLANGE MEMBER, A RESILIENT ELEMENT MOUNTED ON SAID SHANK AND INTERPOSED IN ENGAGEABLE RELATIONSHIP BETWEEN SAID ABUTMENT AND SAID FLANGE MEMBER, A DETACHABLE OPERATING HANDLE FOR ACTUATING SAID TOGGLECLAMP LEVER AND CAUSING SAID CAM MEMBER THEREOF TO BEAR ON SAID LUG, SAID HANDLE HAVING A TIP PORTION SNUGLY INSERTABLE IN SAID ORIFICE AND SAID TOGGLE-CLAMP LEVER HAVING AT LEAST ONE FRANGIBLE PART SELECTED FROM THE GROUP INCLUDING THE PIVOTAL CONNECTION OF SAID CAM MEMBER AND SAID TIP PORTION OF SAID HANDLE AND ADAPTED TO BREAK AT A GIVEN STRESS TO PREVENT OVERLOAD, A BRACKET MEANS INTEGRAL WITH AND PROJECTING FROM SAID OTHER SIDE OF SAID FLANGE MEMBER ABOUT SAID OPENING THEREIN AND PROVIDED WITH A BEARING END FACE FORMED WITH A HOLE SUBSTANTIALLY REGISTERING WITH SAID OPENING FOR THE PASSAGE OF SAID SHANK THERETHROUGH AND ENGAGEABLE BY SAID ABUTMENT THROUGH SAID RESILIENT ELEMENT, SAID BRACKET CONSISTING OF A STIRRUP-LIKE PART FORMING A HOLLOW RECESS FOR ACCOMMODATING SAID TOGGLECLAMP LEVER IN ITS INOPERATIVE POSITION, SO THAT THE LATTER IS ENTIRELY RETRACTABLE IN SAID RECESS AND DOES NOT PROTRUDE FROM SAID FLANGE MEMBER ON THE SIDE OF SAID FIRST PART.