Closure fasteners – Extension link – Multiple
Patent
1985-06-07
1988-08-09
Moore, Richard E.
Closure fasteners
Extension link
Multiple
E05C 1732
Patent
active
047623519
ABSTRACT:
A security device for limiting the opening of a door comprises a first base member mounted on a door and a second base member mounted on a door frame. A first connecting member is pivotably mounted on the second base member and a second connecting member is pivotably connected to said first connecting member. The second connecting member has a T-shaped end portion which is engageable with a T-shaped slot of the first base member. When the T-shaped end of the second connecting member is engaged in the slot of the first base member, the door is prevented from opening more than a distance which is insufficient to allow access to a room protected by the security device. Preferably, the security device includes biasing members so that the first and second connecting members are rotated away from the door opening when the T-shaped end portion of the second connecting member is disengaged from the slot of the first base member, to thereby reduce the probability of interference of the security device with the opening and closing of the door.
REFERENCES:
patent: 609214 (1898-08-01), Shaw
patent: 924081 (1909-06-01), Loev
patent: 1029693 (1912-06-01), Klein
patent: 2093039 (1937-09-01), Eamon
patent: 3004419 (1961-10-01), Folk, Jr.
patent: 4391463 (1983-07-01), Costa Bastart
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