Locking/unlocking state confirming device

Details Locking/unlocking state confirming device Locking/unlocking state confirming device

1994-08-08

1996-08-27

Meyers, Steven N.

Locks

Operating mechanism

Using a powered device

70432, 70408, 70413, E05B 4100, E05B 4700

Patent

active

055489842

ABSTRACT:
A locking/unlocking state confirming device includes a drive magnet formed of at least a pair of permanent magnets and a key provided with a key bow. A magnet holding chamber is formed within the key bow. An indicator magnet within the chamber is magnetized in a direction at a right angle relative to a center axis thereof and has first and second outer peripheral surfaces painted different colors. A viewing window is open to the chamber at at least one side surface of the key bow. A holding plate is disposed within the key bow at a location rearwardly of the magnet holding chamber.

REFERENCES:
patent: 3394565 (1968-07-01), Turman
patent: 4908605 (1990-03-01), Takatsuka
patent: 4936896 (1990-06-01), Takatsuka

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