Emergency release for security panels

A security panel having a emergency release, said panel being mounted for opening or removal in one direction only and comprising:

• a frame having a key opening formed through one side and a slot opening formed through the opposite side, said openings being out of axial alignment;
• lock mechanism mounted in said frame, said lock mechanism comprising a pair of slide levers disposed on opposite sides of a set of tumblers, one slide lever being engageable by a key inserted through the key opening, the other slide lever being accessible from the opposite side of said frame through the slot opening;
• and means responsive to sliding actuation of said pair of slide levers for securing or releasing said frame to or from a support;
• and an emergency release subassembly comprising a support bracket and a bell crank pivoted from said bracket, one end of said crank being receivable through the slot opening and engageable with said other slide lever;
• whereby the security panel may be opened from a closed and locked position to an open position either by a key from one side of the panel or by applying a force to the bell crank from the opposite side of the panel.