Door locking methods and apparatus

A method of releasably blocking a door, including the steps of:

• providing an aperture in said door;
• combining a first element with said door for blocking said door in an extended position of said first element and for alternatively releasing said door upon movement of said first element from said extended position;
• releasably blocking said first element in said extended position by removably locating a second element in a path of movement of said first element;
• locking said door by locking said first element in said extended position in said aperture against movement away from said second element and blocking said locked first element with said second element;
• releasing said locked first element by selectively removing said second element from said path of movement of said first element;
• releasing said door by moving said released locked first element in said path of movement while said second element is removed from said path of movement of said first element;
• selectively stopping said first element against movement in said path of movement despite a removal of said second element from said path of movement;
• subsequently restoring said first element to said extended position and said second element to a location in said path of movement of said first element;
• and
• subsequently unblocking said door by unlocking said first element and removing said unlocked first element through said aperture in a direction away from said second element.

A method of releasably blocking a door, comprising in combination the steps of:

• combining a first element with said door for blocking said door in an extended position of said first element and for alternatively releasing said door upon movement of said first element from said extended position;
• releasably blocking said first element in said extended position by removably locating a second element in a path of movement of said first element;
• locking said door by locking said first element in said extended position and blocking said locked first element with said second element;
• releasing said locked first element by selectively removing said second element from said path of movement of said first element;
• releasing said door by moving said released locked first element in said path of movement while said second element is removed from said path of movement of said first element;
• subsequently restoring said first element to said extended position and said second element to a location in said path of movement of said first element;
• providing said first element with an anisometric configuration against movement in said path of movement despite a removal of said second element from said path of movement, and
• alternatively permitting said first element in a second orientation of said first element at said anisometric configuration to move in said path of movement upon removal of said second element from said path of movement.

In a method of releasably blocking a door, the improvement comprising in combination the steps of:

• providing a lock for said door with a first element for selectively blocking and unblocking said door;
• providing said lock with a facility for selectively locking said first element against an unblocking of said door;
• providing said lock with a second element for enabling unblocking of said door in response to receipt of a code, despite said locking of the first element;
• and
• selectively limiting an unblocking of said door to an unlocking through said facility, despite any receipt of said code.

Apparatus for releasably blocking a door, comprising in combination:

• a first element at said door for blocking said door in an extended position of said first element and for alternatively releasing said door upon movement of said first element from said extended position;
• a second element situated at a location in a path of movement of said first element for releasably blocking said first element in said extended position;
• means for locking said door, including means for locking said first element in said extended position relative to said second element;
• means for circumventing said locking means, including means coupled to said second element for selectively removing said second element from said path of movement of said first element whereby said locked first element is movable from said extended position for releasing said door;
• means for restoring said first element to said extended position and said second element to said location in the path of movement of said first element;
• and
• means at said first element for selectively stopping said first element against movement in said path of movement despite a removal of said second element from said path of movement.

Apparatus for releasably blocking a door, comprising in combination:

• a first element at said door for blocking said door in an extended position of said first element and for alternatively releasing said door upon movement of said first element from said extended position, said first element having an anisometric configuration;
• a second element situated at a location in a path of movement of said first element for releasably blocking said first element in said extended position;
• means for locking said door, including means for locking said first element in said extended position relative to said second element;
• means for circumventing said locking means, including means coupled to said second element from said path of movement of said first element whereby said locked first element is movable from said extended position for releasing said door;
• means at said first element for stopping said first element in a predetermined orientation of said first element at said anisometric configuration against movement in said path of movement despite a removal of said second element from said path of movement;
• and
• means for restoring said first element to said extended position and said second element to said location in the path of movement of said first element.

In apparatus for releasably blocking a door, the improvement comprising in combination:

• a lock for said door having an element for selectively blocking and unblocking said door;
• a locking mechanism for selectively locking said element against an unblocking of said door;
• means for receiving a code;
• means connected to said receiving means and coupled to said lock for enabling unblocking of said door in response to receipt of said code, despite said locking of said element with said locking mechanism;
• and
• means for selectively limiting an unblocking of said door to an unlocking through said locking mechanism, despite any receipt of said code, including an anisometric configuration of said element and means at said anisometric configuration for limiting in a first orientation of said element at said anisometric configuration an unblocking of said door to an unblocking through said locking mechanism.