Locking device

Details Locking device Locking device

1986-12-08

1988-07-05

Wolfe, Robert L.

Locks

Operating mechanism

Key

70378, E05B 2500

Patent

active

047546301

ABSTRACT:
A locking device which can be unlocked even in the dark by a simple operation such as inserting a card key, wherein a slit is provided in a casing for receiving the card key, a slider is provided movably inside the casing, a tumbler is inserted movably into the slider and protruding its point into the slit, and an engaging projection is provided on the tumbler. The engaging projection comes into engagement with a groove provided on the bottom of the casing so that the movement of the slider is prevented for completing a locking process. A card key provided with a plurality of holes of different diameters is inserted into the slit for moving the tumbler to an unlocking position, so that the engaging projection is disengaged from the groove to allow the slider to move in a predetermined direction for completing an unlocking process.

REFERENCES:
patent: 211832 (1879-02-01), Brook et al.
patent: 1105161 (1914-07-01), Schaub
patent: 4287737 (1981-09-01), Ahn

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