Closure fasteners – Keepers
Patent
1978-03-01
1980-02-19
Lyddane, William E.
Closure fasteners
Keepers
29234118, 292346, E05B 1502
Patent
active
041891759
ABSTRACT:
Disclosed herein is an improved door strike noteworthy in its ability to resist forced entry when disposed upon a door. The structure includes a member adapted to be inserted in the doorjamb and its associated studs having a cylindrical tang for deep insertion therein, a body portion having a hollowed rectanguloid configuration with a tapered curvilinear top surface attached to the tang, and on the side opposite the tang connected to the body portion is a cylindrical disk portion hving a semi-circular step upper portion remote from the tang with a groove and a lip to allow registry with the mating jimmey proof door piece which has an upstanding projection fashioned to fit in the lip and groove of the security device. Also included is an adjustable striker plate to provide flexibility with doors of different thicknesses and the striker plate is attached within the hollow recess of the body portion of the security device with the net effect that the resulting structure will not permit the use of tools or force to pry the door open.
REFERENCES:
patent: 2144075 (1939-01-01), Mora
patent: 2412497 (1946-12-01), Edwards
patent: 2470735 (1949-05-01), Young
patent: 2631881 (1953-03-01), Trachsler
patent: 2937898 (1960-05-01), Russell
patent: 3290081 (1966-12-01), Sushan
patent: 3405962 (1968-10-01), Sushan
patent: 3442543 (1969-05-01), Weyman
patent: 3592498 (1971-07-01), Raccuglia, Sr.
patent: 4005890 (1977-02-01), Murch
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