Abstract: A crusher which is simple in structure and capable of dismantling a building structure and recovering iron material from among dismantled remains of a building. A movable jaw is provided so as to be opened and closed relative to a fixed jaw fixed to the crusher main frame. A magnetic case made of a nonmagnetizable material is provided on the bottom of the main frame. A permanent magnet assembly is slidably mounted in the case. The permanent magnet assembly is connected to a hydraulic cylinder for sliding the permanent magnet. By actuating the hydraulic cylinder, the permanent magnet will move down so that iron material is attracted through a bottom plate of the magnet case. By raising the permanent magnet assembly, the magnet weakens, so that the attracted iron material drops by gravity.

Abstract: A programming system fitted with CRT comprising a programming control unit fitted with CRT and simulation unit for a programmable controller in which the programming control unit fitted with CRT consists of a central processing unit (CPU), a control programming ROM and a controlling RAM being connected to the CPU and a keyboard connected with the CPU through a CRT controller and keyboard controller, and further involves an interfacial part for connecting the programming control unit with the simulation unit, while the simulation unit for programmable controller consists of a control programming ROM for the programmable controller, a control RAM, and respective memories corresponding to a process input image memory and a process output image memory, and further possesses interfacial functions being connectable to the programming control unit fitted with CRT.