Snap-off key

Details Snap-off key Snap-off key

1980-11-14

1983-09-06

Wolfe, Robert L.

Locks

Operating mechanism

Key

70410, E05B 1926

Patent

active

044022018

ABSTRACT:
The invention is a unibody key with lateral grooves on one side or both sides of the shank of the key. The lateral grooves are of an irregular pattern and are cut at a depth such that the key can be snapped off along the lateral groove. The snapped-off portion ofthe key can be inserted in a lock. By inserting the snapped-off portion in the lock, only a key which will mate with the irregular pattern of the snapped-off portion will give proper alignment for a key to open such lock. By such operation, the key necessary to open the lock is easily, quickly and effectively changed.

REFERENCES:
patent: 1528641 (1925-03-01), Vives
patent: 1573791 (1926-02-01), Roethlisberger
patent: 2591652 (1952-04-01), Ziegliss
patent: 3338365 (1967-08-01), Hoffberger

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