| 摘要 |
A locking fastener assembly is disclosed for securing electronic equipment or the like to a mounting bracket. The device includes a stud assembly comprising a threaded shank portion for passing through an opening in the bracket, and being threadingly received in an opening at the equipment. An enlarged head adjoins the shank and has a plurality of openings for receiving engaging pins from a cooperating tool. The spatial pattern of the openings (e.g. a spiral) define a plurality of different spacings between pairs of the openings. An annular freely rotatable collar surrounds the head and projects to at least cover the rim of the head, to prevent grasping of such head by a tool. A tool member is provided having a face opposable to the head, the face including a plurality of openings in a pattern corresponding to that on the head. A pair of engaging pins are secured within a pair of openings in the tool member, whereby by overlying the pattern on the tool member with the corresponding pattern on the head, the pair of pins may engage with corresponding openings in the head to permit application of torque for tightening and loosening the stud assembly. The operator may set or encode the fastener assembly by inserting the engaging pins at a selected pair of the openings in the tool member, and closing all openings on the head with a filler material except for the pair of openings alignable with the selected pair at the tool member. Accordingly only a tool member similarly set or encoded will be operable to engage with the head portion.
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