Resilient means for driving escape wheel

Claim 1

IN A TIMEPIECE MOVEMENT INCLUDING A GEAR TRAIN TIMED BY A BALANCE WHEEL, HAIRSPRING, PALLET, AND PALLET PINS, A SILENT ESCAPEMENT MECHANISM DIRECTLY INTERCONNECTING THE GEAR TRAIN WITH THE PALLET PINS COMPRISING, IN COMBINATION, AN ESCAPE STEM COMPRISING A POSITIVELY DRIVEN SUBASSEMBLY AND A RESILIENTLY DRIVEN SUBASSEMBLY; THE RESILIENTLY DRIVEN SUBASSEMBLY CONSISTING OF A THIN, FLAT ESCAPE WHEEL FIXEDLY MOUNTED ON AND INTERMITTENTLY ROTATABLE WITH A CENTRAL HUB HAVING A DRIVEN COUPLING COLLAR THEREON; THE POSITIVELY DRIVEN SUBASSEMBLY CONSISTING OF A ROTATABLE SHAFT WITH A DRIVEN PINION, COUPLING COLLAR AND INERTIA WHEEL CARRIED THEREON AND RIGIDLY INTERCONNECTED TO EACH OTHER FOR SIMULTANEOUS MOVEMENT; SAID INERTIA WHEEL BEING AXIALLY SPACED FROM THE ESCAPE WHEEL AND BEING OF SUBSTANTIAL DIAMETER, THICKNESS AND MASS IN RELATION THERETO; THE COLLARS CARRIED BY THE AFORESAID SHAFT AND THE AFOREMENTIONED ESCAPE HUB BEING COAXIAL WITH EACH OTHER AND PROJECTING TOWARD EACH OTHER IN OPPOSITE ORIENTATION, BUT WITH THEIR ENDS SUBSTANTIALLY SPACED APART; SAID DRIVING AND DRIVEN COLLARS BEING YIELDABLY INTERCONNECTED TO EACH OTHER BY A RESILIENT DRIVER OF GENERALLY SLEEVE-LIKE FORM, WITH AT LEAST THE OPPOSITE END PORTIONS OF SAID DRIVER HAVING NORMAL INSIDE DIAMETERS NO GREATER THAN THE OUTER DIAMETERS OF THE AFORESAID COLLARS WHEREBY THE ENDS OF THE SAID DRIVER MAY BE TELESCOPED THEREON IN ASSEMBLY TO SNUGLY ENGAGE THE AFORESAID COLLARS, BUT WITH SAID DRIVER CONTACTING ONLY SAID COUPLING COLLARS AND WITH OPEN SPACE WITHIN THE DRIVER IN THE AREA BETWEEN THE ADJOINING ENDS OF THE AFORESAID COLLARS TO PERMIT UNOBSTRUCTED FLEXING MOVEMENT OF AN UNSUPPORTED FREE-STANDING PORTION OF THE DRIVER BETWEEN SAID COLLARS.