Locks – Operating mechanism – Key
Patent
1986-01-13
1987-05-26
Wolfe, Robert L.
Locks
Operating mechanism
Key
33540, 81 159, 81488, E05B 1920
Patent
active
046674942
ABSTRACT:
A tool set and a method of opening and decoding a side bar lock employing wafer type tumblers. A spring compressor tool configured for insertion into the lock mechanism keyway raises all the tumblers to a radially outward position and compresses the springs that normally bias the tumblers inwardly. A spring retainer tool inserted into the keyway with the spring compressor tool engages the tumbler springs to retain the springs in a compressed position but frees the tumblers for movement. A tumbler adjusting tool is inserted to grasp the tumblers, and move the tumblers to a position where the lock mechanism can be opened. A decoding tool is inserted to measure the radial position of each tumbler and provide a number which can be used to make a new key. A dust cover holding tool is provided to hold open the spring actuated dust cover.
REFERENCES:
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patent: 947913 (1910-02-01), Jenkins
patent: 1863525 (1932-06-01), Long
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patent: 2338768 (1944-01-01), Johnstone
patent: 3827151 (1974-08-01), Naill
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patent: 3987654 (1976-10-01), Iaccino et al.
patent: 4006613 (1977-02-01), Zion
patent: 4185482 (1980-01-01), Nail
Gall Lloyd A.
Smith Donald P.
Wolfe Robert L.
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