Security door locking mechanism

In a lock mechanism for a security door having an activating member adapted for movement from outside the door to bolt and unbolt the door, the improvement comprising:

• (a) first locking means for releasably engaging the activating member to prevent movement thereof, said first locking means comprising a first sliding member adapted to slide into and out of engagement with the activating member;
• (b) second locking means for releasably engaging said first locking means to prevent movement thereof whereby said second locking means must be released before said first locking means can release said activating member, said second locking means comprising a second sliding member adapted to slide into and out of engagement with an abutting surface of said first sliding member;
• (c) means for operating said first locking means from outside the door;
• and,
• (d) means for operating said second locking means from outside the door.

A locking assembly for releasably engaging a member to prevent movement thereof comprising:

• (a) a support plate adapted to be mounted adjacent the members;
• (b) a first slider carried by said support plate for sliding movement between a first position engaged with the member to prevent movement thereof and a second position disengaged from the member and wherein said first slider has a slot therein;
• (c) a second slider carried by said support plate for sliding movement between a first position in abutment with said first slider and holding said first slider in its said first position and a second position out of abutment with said first slider wherein said second slider is disposed in said slot and said first slider is free to move between its said first and second positions;
• and,
• (d) means carried by said support plate for moving said slider between and for holding said sliders in said positions.

A locking assembly for releasably engaging a member to prevent movement thereof comprising:

• a support plate adapted to be mounted adjacent the members;
• a first slider carried by said support plate for sliding movement between a first position engaged with the member to prevent movement thereof and a second position disengaged from the member;
• a second slider carried by said support plate for sliding movement between a first position in abutment with said first slider and holding said first slider in its said first position and a second position out of abutment with said first slider wherein said first slider is free to move between its said first and second positions;
• and
• means carried by said support plate for moving said slider between and for holding said sliders in said positions wherein:
• said moving and holding means each comprises a lock mechanism with a extending and retracting lock bolt and said lock bolts are connected to respective ones of said sliders to move in combination therewith.

A universal lock bolt actuating mechanism for use in a security door comprising:

• (a) a support plate adapted to be mounted to a security door having slidable lock bolts thereon, said support plate including a pin extending normal to the surface of said plate;
• (b) an activating member mounted on said pin for rotation, said activating member including a plurality of means for operably and removably connecting said member to one end of linkages operably connected on the other end to the lock bolts on the security door whereby the lock mechanism can be used in different doors with modification of only the linkages;
• (c) means for rotating said activating member;
• and
• (d) means for locking said activating member against rotation wherein said locking means comprises:
• a first slider carried by said support plate for sliding movement between a first position engaged with said activating member to prevent rotation thereof and a second position disengaged from said activating member;
• a second slider carried by said support plate for sliding movement between a first position in abutment with said first slider and holding said first slider in said first position and a second position out of abutment with said first slider wherein said first slider is free to move between its said first and second positions;
• and, means carried by said support plate for moving said sliders between and for holding said sliders in said positions.