Dual driver torsion spring mechanism

Claim 1

IN A LOCK DEVICE INCLUDING AN ESCUTCHEON ASSEMBLY COMPRISING A STATIONARY ELEMENT HAVING SPRING ENGAGING MEANS THEREON, AN OPERATING ASSEMBLY COMPRISING A HAND HOLD ROTATABLY MOUNTED IN SAID ESCUTCHEON ASSEMBLY, AND A LATCH SPINDLE CONNECTED TO SAID HAND HOLD AND HAVING ONE POSITION OF ADJUSTMENT ROTATABLE RELATIVE TO SAID HAND HOLD, THE COMBINATION OF A TORSION SPRING ASSEMBLY COMPRISING A FIRST MEMBER HAVING A NON-ROTATABLE ENGAGEMENT WITH SAID HAND HOLD, A SECOND MEMBER HAVING A NON-ROTATABLE MOUNTING ON SAID SPINDLE, AND A TORSION SPRING HAVING OPPOSITE ENDS EXTENDING IN POSITIONS SUBSTANTIALLY IN ENGAGEMENT WITH SAID SPRING ENGAGEMENT MEANS, A SET OF CIRCUMFERENTIALLY SPACED SPRING DRIVERS FORMING PART OF SAID SECOND MEMBER SUBSTANTIALLY IN ENGAGEMENT RESPECTIVELY WITH SAID ENDS OF THE SPRING, ANOTHER SET OF SPRING DRIVERS ON THE FIRST MEMBER IN ENGAGEMENT WITH SAID ENDS OF THE SPRING WHEREBY SAID SPRING AT EACH END THEREOF COMPRISES A RETURNING MEANS AFTER MOVEMENT OF ONE SPRING DRIVER OF EITHER OF SAID SETS ALTERNATIVELY AGAINST THE RESPECTIVE END OF SAID TORSION SPRING.