Abstract: A bending die for forming a 180.degree. bend in a tube includes a center die and a shiftable block pivotally mounted to the center die grooves are defined on opposing sides of the center die and shiftable block for supporting the tube while being bent. The grooves have a C-shaped cross section for receiving and holding the tube during the bending process, but which grooves create an interference condition trapping the bent tube in a plane defined by the grooves. The shiftable block is pivotally connected to the center die and movable between a bend-forming position where the shiftable block forms an upper part of the groove along the one opposing side and part of the end, and a tube-release position where the shiftable block is removed from the one opposing side. The bending die also includes a clamp die that both clamps the tube to the center die and also holds the shiftable block to the center die while the tube is being bent, but which is movable to release the shiftable block.

Abstract: A drawer interlock combination for a stack or tier of drawers and simplified to include a frame forming a receptacle guide for a plurality of rotors, one rotor for each drawer in the stack and the same frame guiding a plurality of actuators, one for each drawer through a path limited in both extremes of travel and displaceable by the action of only one of the rotors so that only a single drawer may be opened at a time and plural drawers cannot be opened concurrently. The device may be completely locked by simple blocking of the travel of the actuators to less displacement than by an single of the rotors. The structure is simple, economical and easy to install. The parts repeat themselves and provide excellent drawer stabilization with overall locking of all drawers.