Attachment for transforming lock cylinders into interchangeable

Details Attachment for transforming lock cylinders into interchangeable Attachment for transforming lock cylinders into interchangeable

1991-07-25

1992-06-16

Luebke, Renee S.

Locks

Operating mechanism

Key

70371, 70386, 70422, E05B 2700

Patent

active

051216183

ABSTRACT:
An attachment (9) which transforms a lock cylinder having a cylinder housing (30), an aligning bracket (27), and a cylinder core 41a into a lock cylinder with an interchangeable core (40a). The interchangeable core (40a) is held in place and is attached to the interchangeable attachment (9) using a conventional cylinder core nut (21). With a control key (50) inserted into the cylinder keyway (42) within an interchangeable core (40a), a push rod (51) comes into contact with a plunger head (19) at the front end of the plunger (11). The plunger (11) is pushed back, allowing the locking balls (13) to recede into the inward position; at this point, the only thing holding the interchangeable core lock cylinder (40a) in the cylinder housing (30) is the security back-up pin (14). With the control key (50) inserted, turn right five degrees and pull. The interchangeable core lock cylinder (40a) will come out. A new interchangeable core lock cylinder (40a) can be inserted using the same procedure.

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patent: 4995249 (1991-02-01), Preissler et al.
patent: 5040652 (1991-08-01), Fish et al.

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