Randomly-false-gated tumbler wheels for combination locks

Details Randomly-false-gated tumbler wheels for combination locks Randomly-false-gated tumbler wheels for combination locks

1986-05-12

1990-02-20

Raduazo, Henry E.

Locks

Operating mechanism

Combination

70333R, E05B 3700

Patent

active

049015460

ABSTRACT:
The tumbler wheels have a plurality of false gates, each having a width, depth and/or angular position feature which is a random value selected from within given circumferential, radial and/or angular locational limits, respectively, to foil sophisticated sound wave analyzers. Additonally, the wheel may include an outer periphery whose radius between pairs of adjacent gates is randomly variable within given limits. A method and apparatus for producing the random wheels in large batches includes spindling a large number of blank wheels on an arbor and randomly rotating the arbor selectively relative to a cutting tool which is randomly movable selectively in two axes.

REFERENCES:
patent: 8593 (1851-12-01), Rickards et al.
patent: 176876 (1876-05-01), Miller
patent: 1655840 (1928-01-01), Nichin
patent: 2016487 (1935-10-01), Doenges
patent: 2856765 (1958-10-01), Sreb
patent: 3098376 (1963-07-01), Miller
patent: 3106083 (1983-10-01), Manynard
patent: 3968667 (1976-07-01), Gartner et al.
patent: 3983727 (1976-10-01), Todd
patent: 4142388 (1979-03-01), Phillips et al.

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