Importance

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Abstract

The invention relates to a lock mechanism for doors, preferably for use with dwellings, apartments or offices, the locking mechanism providing in particular a measure of safety against unauthorized opening of the lock. The lock mechanism is of a type which at will may be alternatively actuated from the inside either by a key or a thumb turn. When the resident of the house leaves he may in a simple manner suspend the function of the thumb turn. The lock is on its inside equipped both with a key hole hand and a thumb turn. The thumb turn may be engaged or disengaged with a dead bolt by means of a screw means. The screw means is actuated from the front of the lock, actuating an arm which actuates a transmission element bringing the transmission means of the thumb turn into, respectively out of engagement with the transmission means on the follower so that the lock at the operators will either will be actuated by a key or a thumb turn.

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First Claim