Door locking methods and apparatus

Locks – Special application – For closures

Patent

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Details

70 14, 70 34, 70279, 70285, 70371, 70470, 70DIG26, 292150, E05B 6508, E05B 4900, C14B 140

Patent

active

045704660

ABSTRACT:
Methods and apparatus for releasably locking or blocking a door combine a first element with that door for blocking the door in an extended position of that first element and for alternatively releasing the door upon movement of the first element from such extended position. The first element is releasably blocked in its extended position by removably locating a second element in a path of movement of the first element. The door may be locked by locking the first element in its extended position and blocking such locked first element with the second element. The locked first element is released by selectively removing the second element from the path of movement of the first element, and the door is released by moving the released locked first element in its path of movement while the second element is removed from such path of movement. The first element may selectively be unlocked while it is blocked by the second element, and such blocked unlocked first element may be removed for a release of the door. The first element may be provided with an anisometric configuration against movement despite a removal of the second element from the path of movement of the first element. Alternatively, the first element may be permitted in a second orientation at its anisometric configuration to move upon removal of the second element from its path of movement.

REFERENCES:
patent: 924331 (1909-06-01), Feola
patent: 2636762 (1953-04-01), Jameson
patent: 3136147 (1964-06-01), Noster
patent: 3656327 (1972-04-01), Ford et al.
patent: 3733861 (1973-05-01), Lester
patent: 3751088 (1973-08-01), Schlage et al.
patent: 3956911 (1976-05-01), Corboud
patent: 4038846 (1977-08-01), Klann
patent: 4068506 (1978-01-01), Phelps
patent: 4099752 (1978-07-01), Geringer
patent: 4183235 (1980-01-01), Coralli et al.
patent: 4351170 (1982-09-01), Clompus

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