Hidden lock for a jewelry box

Closure fasteners – Bolts – Spring arm

Patent

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Details

220323, 292337, 292DIG4, E05C 1902

Patent

active

052114309

ABSTRACT:
A hidden lock for a jewelry or treasure box which is equipped with a flexible metal wire having one end thereof projected from an opening disposed at the bottom of the front side of a lower case; and a lock plate having an M shaped recess disposed thereon being disposed on the inner surface of the lower case of the box for engagement with the projected end of the wire which can be slidably guided through the recess. The cover case is associated with the lower case by means of a pair of spring biased hinges so that the cover case can be automatically opened as the cover case is pushed downward, permitting the flexible metal wire to be disengaged with the M shaped recess of the lock plate. The M shaped recess having three turnings is particularly designed to have an increasingly raised and abruptly dropped surface disposed before each turning with a hooked stop formed at each turning thereof so that the projected wire can have easy access to the recess and slidably and limitedly travel therein and can be retained in place by the second, hooked stop so as to make the box locked; and the box can be opened by simply pressing down the cover case so as to permit the projected end of the metal wire to travel along the third raised and dropped surface and disengage with the M shaped recess.

REFERENCES:
patent: 3189374 (1965-06-01), Mertes
patent: 4641747 (1987-02-01), Mestdogh et al.
patent: 5050922 (1991-09-01), Falcoff

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