Locks – Operating mechanism – Key
Patent
1997-08-04
1999-10-12
Meyers, Steven
Locks
Operating mechanism
Key
70380, 70381, E05B 2700
Patent
active
059641118
ABSTRACT:
A pick resistant lock assembly has two lock sections which can be opened in two stages separated by time using a single key. Both lock sections share the same multiple stacks of locking pin tumblers which engage the machined depths provided on the key, but only the first lock section includes a key plug. The second lock section is also provided with the addition of an extra stack of locking pin tumblers completely isolated from any contact with the key or any picking tools, which pin stack is operated solely from a cam that is machined into the first locked section and serves to supplementally lock only the second locked section until after the first locked section is rotated slightly by the use of the key, whereupon the second locked member is released from being locked by the isolated stack of locking pin tumblers and is then also made connective to the first lock section by a single pin of the isolated locking pin stack becoming connective to the end wall of the cam cavity such that the first lock section and second lock section can then be rotated together, but only if the selectively machined key had been used in the beginning, else further rotation of either member is prevented by the multiple stacks of locking pin tublers that are common to both.
REFERENCES:
patent: 31278 (1861-01-01), Yale, Jr.
patent: 48476 (1865-06-01), Yale, Jr.
patent: 414720 (1889-11-01), O'Keefe
patent: 899955 (1908-09-01), Collins
patent: 1384022 (1921-07-01), Best
patent: 1417132 (1922-05-01), Barker
patent: 2427837 (1947-09-01), Connell
patent: 3648492 (1972-03-01), Walters et al.
patent: 3961507 (1976-06-01), Falk
patent: 4621510 (1986-11-01), Scherbing
patent: 5000019 (1991-03-01), Foster
patent: 5148690 (1992-09-01), Wang
patent: 5176015 (1993-01-01), Sussina
patent: 5475997 (1995-12-01), Chung
Meyers Steven
Pham Teri
LandOfFree
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