Locks – Operating mechanism – Key
Patent
1990-01-22
1991-08-20
Gall, Lloyd A.
Locks
Operating mechanism
Key
70450, 70451, 292337, 292DIG53, E05B 908
Patent
active
050403931
ABSTRACT:
A modular door lock apparatus having a mainframe defined by a front face plate and an outer and inner side plate extending rearwardly of said front face plate a latch assembly being fixedly mounted to said front face plate, so as to be positioned between the side plates. A key cylinder is secured to the outer side plate and a latch knob is mounted to the inner side plate so as to operate the latch bolt of the latch assembly. The door lock apparatus is secured to the door by sliding the apparatus into a central bore and adjacent longitudinal slots that are formed in the leading edge of the door. The apparatus is then secured to the door by means of a pair of transversely positioned screws that are received through the oppositely disposed slots having their threaded ends extending outwardly of the outer side plate to engage the key cylinder. The screws may also be provided with nuts, which are fixedly positioned against the outer side plate. This allows the side plates to be forced against the outer sides of the door in a vise-like clamping arrangement as the screws are tightened. With the heads of the screws being positioned on the inner side of the door, the door lock apparatus can not be removed therefrom without the door being moved to an open position.
REFERENCES:
patent: 926336 (1909-06-01), Keil
patent: 1483333 (1924-02-01), Capece
patent: 2091248 (1937-08-01), Schlage
patent: 2200387 (1940-05-01), Evath
patent: 2568273 (1951-09-01), Clark
patent: 4002361 (1977-01-01), Laufenburg
patent: 4139999 (1979-02-01), Allenbaugh
patent: 4182528 (1980-01-01), Klay
patent: 4236396 (1980-12-01), Surko, Jr. et al.
Gall Lloyd A.
Lojacono F. X.
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