1979-03-06
1982-06-15
Moore, Richard E.
Closure fasteners
Portable
E05C 1918
Patent
active
043347053
ABSTRACT:
The improved door lock comprises, in combination, means for engaging a doorknob to releasably grip it and means secured to the doorknob-engaging means and adapted to releasably grip the leading edge of a doorjamb adjacent a doorknob gripped by the doorknob-engaging means. The retaining means prevents the doorknob and the door to which the doorknob is attached from being swung out and away from the lock. The lock is adapted to fit into the corner between the doorjamb and the door and to slide over that doorjamb down into contact and around the doorknob. When it is desired to remove the lock it is merely slid up and away from the doorknob. The lock requires no attachment to either the jamb or the door and can be made in a unitary integral form, preferably generally L-shaped in outline. The doorknob-engaging means can comprise a wall which extends out at right angles to the retaining means which may comprise a plate containing a vertical lip on its front end to engage the leading edge of the doorjamb. The wall may define an inverted generally U-shaped opening in its lower end which is adapted to fit around the narrow rear portion of a doorknob. If desired, a generally U-shaped second opening to be provided in the upper end of the wall and a vertical lip on the free end of the wall so that the lock can be inverted for use on doors containing doorknobs on either end of the door. The lock may also include means for adjusting the spacing of the doorknob-engaging means from the retaining means and may further include means for adjusting the length of the retaining means. The lock is simple, inexpensive, durable, effective, easy to place into operative position and to remove from recessed doors which swing outwardly. The lock can also be used in a modified form on doors set flush with their frames.
REFERENCES:
patent: 827624 (1906-07-01), Foster
patent: 1239802 (1917-09-01), Macbeth
patent: 2396982 (1946-03-01), Bousguet
patent: 4004833 (1977-01-01), Hull
patent: 4012065 (1977-03-01), Miller
patent: 4082334 (1978-04-01), Volta et al.
Moore Richard E.
Nist Donald E.
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