Locks – Parts – attachments – accessories and adjuncts – For key-operated mechanism
Patent
1983-05-10
1985-12-10
Wolfe, Robert L.
Locks
Parts, attachments, accessories and adjuncts
For key-operated mechanism
A47G 2910
Patent
active
045571244
ABSTRACT:
This invention consists of a small motor powered by dry cell batteries, which may be varied in number to provide the torque or turning power required to open a lock. A drive plate of friction material is attached to the motor shaft, and when the turner with a key in place is inserted into a lock, the drive plate will contact a similar plate that is fastened to the key-retention head. Such contact will cause the head to rotate and produce the required force needed to open the lock. Should a stubborn lock be encountered, the drive plates will slip and prevent a possible broken key. This arrangement also allows "jogging" of the key rotation which may be helpful in loosening a resistant lock. Another feature of this device is the capability of varying the power needed simply by changing the number of batteries and the body segments that enclose them.
REFERENCES:
patent: 2002818 (1935-05-01), Jones
patent: 2693101 (1954-11-01), Lewis
patent: 3707303 (1972-12-01), Petri
patent: 3788168 (1974-01-01), Steinmann, Jr.
patent: 3797291 (1974-03-01), Simorghi
patent: 3802518 (1974-04-01), Albert
patent: 3935909 (1976-02-01), Mabuchi et al.
patent: 4366871 (1983-01-01), Dieterle et al.
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