Patent ID: 6176109
Filing Date: 2001-01-23
Classification: E05B,Y10T

Abstract:
A combination lock, comprising:a body formed with a plurality of parallel slots and a bore intersecting with the slots to form co-axial apertures through parts of the body immediately above and below each of the slots, each said aperture above a respective slot being formed with an unlocking groove;a plurality of dials received in the slots respectively, each of which is formed around an inner side thereof with a ring of equi-angular recesses;an inverted J-shaped shackle having a longer limb extending into the bore and passing through the dials; anda plurality of tumbler sleeves supported co-axially on the shackle longer limb for individual rotation, each of said tumbler sleeves having on an outer side thereof a locking fin engageable with one of the recesses of a respective dial for rotation by the dial to reach an unlocking position aligned with the unlocking groove of the aperture thereabove, such that the sleeve is movable into the aperture for unlocking the shackle, wherein the locking fin of at least one of the sleeves has an uppermost end which is formed with a step, and the aperture thereabove includes a false-feel groove apart from the unlocking groove for limited entrance by the uppermost end of the fin at a false-unlocking position, thereby giving a false impression that the respective sleeve has been rotated to the unlocking position.