Lock combination decoder

Details Lock combination decoder Lock combination decoder

1988-08-25

1990-03-06

Smith, Gary L.

Locks

Parts, attachments, accessories and adjuncts

For combination-operated mechanism

70446, 70313, 364130, E05B 1700

Patent

active

049054902

ABSTRACT:
Apparatus for determining the opening combination of a safe lock includes a servo motor, a molded dial gripper that fits over the hub of the combination lock dial, and a high resolution rotary, encoder, preferably one with a resolution of 1000 PPR. The rotary encoder has a resolution of 0.09 degrees of rotation using quadrature, which permits the dial to be rotated accurately to within 1/10 of a digit. A programmable logic and control circuit can rotate the dial for automatic implementation of a manipulation technique. This permits the safe combination to be found in a rather short period of time, typically less than one hour.

REFERENCES:
patent: 2974517 (1961-03-01), Jacobs
patent: 4056956 (1977-11-01), Gilliam
patent: 4319223 (1982-03-01), Caruso
patent: 4377847 (1983-03-01), Daniel et al.
patent: 4433563 (1984-02-01), Wilson
patent: 4769583 (1988-09-01), Goor
patent: 4777603 (1988-10-01), Woodman et al.
patent: 4803860 (1989-02-01), Moore
Costley, Brian, "ITL-1000:Opening Safes the Old-Fashioned Way-It Dials Them", Locksmith Ledger, Jun. 1988.
Gilliam, David, "Safe Lock Manipulation Simplified", New York School of Locksmithing, 1975.
Vaughan Armstrong, "Manipulation? Its's a Breeze", Locksmith Ledger, Mar. 1988.

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