Stillages and like transportable loadcarrying appliances

Claim 1

A STILLAGE OR LIKE TRANSPORTABLE LOAD-CARRYING APPLIANCE COMPRISING A FRAME HAVING TWO PARALLEL CHANNEL SIDE MEMBERS WHOSE CHANNELS OPEN OUTWARDLY OF THE FRAME, TWO SUPPORTING LEGS MOUNTED ON EACH OF SAID CHANNEL MEMBERS, EACH OF SAID LEGS HAVING A LATERAL EXTENSION PROJECTING AT RIGHT ANGLES FROM ITS HEAD, SAID EXTENSION ENGAGING IN AND BEING DISPLACEABLE LONGITUDINALLY AND ROTATABLY WITH RESPECT TO BEARINGS CARRIED IN THE FRAME TO ENABLE THE LEG TO BE MOVED BETWEEN AN IDLE POSITION WHEREIN IT IS DISPOSED LENGTHWISE OF THE CHANNEL MEMBER ON WHICH IT IS MOUNTED AND WITHIN THE CHANNEL OF THE SAID MEMBER AND AN OPERATIVE POSITION WHEREIN IT IS SPACED FROM AND OUTWARDLY OF THE SAID CHANNEL MEMBER AND IS TURNED TO DEPEND PERPENDICULARLY FROM THE FRAME, MEANS FOR LOCKING EACH LEG IN ITS IDLE POSITION, AND MEANS FOR LOCKING EACH LEG IN ITS OPERATIVE POSITION, THE SAID SECOND MEANS FOR LOCKING INCLUDING A STAY OF WHICH ONE END IS MOUNTED UPON THE UNDERSIDE OF THE LOWER FLANGE OF SAID CHANNEL MEMBER BY A UNIVERSAL JOINT ENABLING THE STAY TO BE SWUNG BETWEEN A POSITION WHEREIN IT LIES BELOW AND PARALLEL TO THE SAID FLANGE AND AN ALTERNATIVE POSITION WHEREIN IT IS INCLINED BOTH DOWNWARDLY FROM AND OUTWARDLY OF SAID FLANGE, AND OF WHICH THE OPPOSITE END IS PROVIDED WITH A COUPLING PLATE SLIDABLY ENGAGEABLE BETWEEN GROOVED BLOCKS ON THE LEG WHEN SAID LEG IS IN ITS OPERATIVE POSITION, SAID PLATE HAVING A SHOULDER ON ONE BLOCK-ENGAGING EDGE AND ONE OF SAID BLOCKS HAVING A SPRING LOADED AND MANUALLY RETRACTABLE BOLT FOR ENGAGING BEHIND SAID SHOULDER TO PREVENT DISENGAGEMENT OF SAID PLATE FROM SAID BLOCKS.