Structure utilizing electric release

Claim 1

IN APPARATUS FOR POSITIONING A LOAD: A FRAME HAVING A BASE AND WALLS FORMING A CYLINDRICAL SPACE ON ONE SIDE OF THE BASE; SAID BASE HAVING AN AXIAL BORE; A STEM GUIDED IN THE BORE AND HAVING ONE END LOCATED IN SAID SPACE PROVIDED WITH A LATCHING HEAD; SPRING MEANS ACTING UPON THE OTHER END OF THE STEM URGING THE STEM SO THE HEAD MOVES TOWARD THE BASE; AN OPERATING MEMBER GUIDED BY SAID WALLS FOR AXIAL MOVEMENT THEREIN, SAID OPERATING MEMBER HAVING A SURFACE OPPOSED TO THE BASE; SAID OPERATING MEMBER HAVING A RECESS EXTENDING CIRCULARLY ABOUT SAID AXIS; AN ELECTROMAGNET COIL MOUNTED IN SAID RECESS; SAID END SURFACE OF SAID OPERATING MEMBER PROVIDING POLAR AREAS FOR SAID ELECTROMAGNET COIL; A CAP CARRIED BY SAID ONE END OF SAID OPERATING MEMBER AND DEFINING WITH SAID ONE END, A CIRCULAR SPACE; AN ARMATURE RING IN SAID SPACE AND MOVABLE TOWARD AND AWAY FROM SAID SURFACE BETWEEN SMALL LIMITS DETERMINED BY SAID CAP; A PAIR OF CATCHES PIVOTALLY MOUNTED BY SAID MEMBER ON OPPOSITE SIDES OF SAID AXIS FOR RELEASABLE ENGAGEMENT WITH SAID HEAD, SAID CATCHES HAVING ARMS PROJECTING RADIALLY OUTWARDLY AND LOCATED BETWEEN SAID RING AND SAID END SURFACE FOR RELEASING SAID CATCHES UPON MOVEMENT OF SAID RING TOWARD SAID SURFACE; SPRINGS HAVING ENDS CARRIED BY THE RESPECTIVE CATCHES FOR MOVING THE CATCHES TOWARD LATCHING POSITION; AND A HANDLE CONNECTED TO THE OPERATING MEMBER.