Four way security door

A security door assembly adapted for securing the respective sides of double doors in locking engagement with an adjacent door jamb structure, said assembly comprising a side-by-side pair of double doors hingedly connected along their respective outside edges to opposing vertically extending door jambs and positioned with their respective inside edges in opposing relation, one of said doors being the active door, the other being the inactive door;

• each door having a rectangular frame with interconnected upper, lower, and opposing side members which collectively define the respective peripheral edges of the door;
• front and rear substantially rectangular panels mounted on opposite sides of the respective frames coextensive therewith and defining the respective front and rear faces of the respective doors with respective hollow interior portions located therebetween;
• respective openings provided in medial portions of each of the upper, lower and opposing side members of said frames and communicating with the hollow interior portions of the doors;
• respective guide means provided within the hollow interior portions of the doors and adjacent the respective openings in the upper, lower and opposing side frame members of each of said doors, rotatable plate means located within the hollow interior portion of each of said doors;
• means in each of said doors cooperating with the respective rotatable plate means therein and with said frame means and mounting said plate means for rotatable movement about a predetermined axis located medially of the plate means;
• four elongate locking members positioned within the hollow interior portion of said active door, a distal end portion of each of said locking members cooperating with a respective one of said guide means and being positioned for protruding through a respective peripheral edge of the door;
• means cooperating with the proximal end portions of the respective elongate locking members for pivotally connecting the same to said rotatable plate means at locations radially spaced from said predetermined medial axis so that when the plate is rotated, the respective locking members are moved longitudinally to protrude from the respective peripheral edges of the active door and engage the adjoining door jamb structure and the opposing inside edge of the inactive door to lockingly secure the doors in place;
• three elongate locking members positioned within the hollow interior portion of said inactive door, a distal end portion of each of said locking members cooperating respectively with the guide means located on the upper, lower and outer side frame member of the inactive door and being positioned for protruding through a respective peripheral edge of the door;
• means cooperating with the proximal end portions of the respective elongate locking members for pivotally connecting the same to said rotatable plate means at locations radially spaced from said predetermined medial axis so that when the plate is rotated, the respective locking members are moved longitudinally to protrude from the respective upper, lower and outside peripheral edges of the inactive door and engage the adjoining door jamb, the guide means located on the inner side frame member of the inactive door being positioned for receiving the protruding end portion of the locking member of the adjacent active door;
• respective cooperating operating levers located on the inner face of the active door and the inactive door, said operating levers cooperating respectively with said pivot plates so as to permit manually rotating the same, and said operating levers, when positioned so as to locate the locking members in the extended locked position, having portions thereof overlying one another with an opening therethrough adapted for receiving a padlock so as to lockingly secure the doors in the locked position.