Tool for picking tubular key cylinder locks

Claim 1

A TOOL FOR PICKING LOCKS OF TH ETYPE WHEREIN THE FRONT PORTION OF A CYLINDER ROTATABLE IN A CASING COOPERATED WITH THE CASING TO DEFINE AN ANNULAR KEYWAY, AND WHEREIN SPRING BIASED TUMBLERS HAVE TUMBLER DRIVERS ARRANGED FOR ACTUATION BY BITTING ON THE END OF A TUBULAR KEY INSERTED INTO THE KEY, SAID PICK COMPRISING: A. AN ELONGATED CYLINDRICAL STEM HAVING (I) A TUBULAR END PORTION OF A SIZE AND SHAPE TO ENTER THE ANNULAR KEYWAY OF A TUBULAR KEY TYPE CYLINDER LOCK AND TO CLOSELY EMBRACE THE FRONT PORTION OF THE CYLINDER, THE WALL OF SAID TUBULAR END PORTION BEING SUBSTANTIALLY THIN SO THAT IT CAN BE INTERPOSED BETWEEN THE TUMBLER DIVERS AND THE CYLINDER, AND (2) A CYLINDER DRIVE LUG ON SAID END PORTION OF THE STEM, PROJECTING FROM THE INTERIOR THEREOF; (B) MEANS ON THE OTHER END PORTION OF THE STEM PROVIDING A HANDLE; (C) TUMBLER ACTUATING MEANS CARRIED BY THE STEM, AT ITS EXTERIOR, COMPRISING A PLURALITY OF SLENDER, ELONGATED FINGERS, ONE OF EACH TUMBLER OF A LOCK TO BE PICKED; D. MEANS MOUNTING SAID FINGERS ON THE STEM, WITH THE FINGERS EXTENDING LENGTHWISE OF THE STEM AND OVER SAID CYLINDER END PORTION THEREOF AND WITH THE FINGERS IN CIRCUMFERENTIALLY SPACED RELATIONSHIP, SAID MOUNTING MEANS CONSTRAINING THE FINGERS TO ROTATE BODILY WITH THE STEM WHILE PROVIDING FOR LENGTH WISE MOVEMENT OF EACH FINGER RELATIVE TO THE STEM AND TO THE OTHER FINGERS; E. BAND MEANS ENCIRCLING THE STEM AND SNUGLY EMBRACING THE FINGERS THEREON AT A LOCATION ADJACENT TO A ZONE MEDIALLY OF THE LENGTH OF THE FINGERS AND PROVIDING THE SOLE MEANS TO PREVENT RADIALLY OUTWARD DISPLACEMENT THEREOF AWAY FROM THE STEM; F. AND FRICTION MEANS MAINTAINED EFFECTIVE BY SAID BAND MEANS TO AT ALL TIMES FRICTIONALLY RESTRAIN THE FINGERS AGAINST LENGTHWISE MOTION RELAIVE TO THE STEM EXCEPT IN RESPONSE TO THE EXERTION OF LENGTHWISE FORCES UPON THE FINGERS THAT EXCEED THOSE WHICH ARE YIELDINGLY IMPOSED UPON THE TUMBLERS OF A CYLINDER LOCK BY THEIR SPRINGS.