Magnetic key-operated locks

Details Magnetic key-operated locks Magnetic key-operated locks

2005-01-11

2005-01-11

Gall, Lloyd A. (Department: 3676)

Locks

Operating mechanism

Using a powered device

C070S387000, C070S413000

Reexamination Certificate

active

06840071

ABSTRACT:
A magnetic card-operated lock has a rotatable exposed cover with a peripheral slot into which a magnetic coded operating card can by inserted for unlocking or locking the lock. The cover and principal locking components are mounted to rotate freely about a central axis between a null position and an unlocking position. A positionable weight is mounted to rotate with the cover plate and is radially separated from the axis so as to bias the cover towards various null positions under the action of gravity. There is also a card lock-in mechanism comprising a card lock-in pin that retains a card in the slot while the lock is unlocked, and a card for said lock with hole and dimple projections to retain it when inserted into the slot.

REFERENCES:
patent: 3995460 (1976-12-01), Sedley
patent: 4133194 (1979-01-01), Sedley et al.
patent: 4918957 (1990-04-01), Eisermann
patent: 5291766 (1994-03-01), Eisermann
patent: 5655395 (1997-08-01), Merchel
patent: 5664449 (1997-09-01), Sedley
patent: 6474121 (2002-11-01), Sakai et al.
patent: 0024242 (1981-02-01), None

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