1
Jay M Prager, Joseph F Sadlow, John K Nitzsche, Thomas A Nikonchuk, John E Farrand, Roman Gonzales, Hiroshi Matsumoto: Universal input/output system construction for programmable controllers. Gould, Mattern Ware Davis & Stoltz, January 27, 1981: US04247882 (46 worldwide citation)

By providing an input/output housing which incorporates paired slider assemblies for supportingly maintaining a printed circuit board in secure electronic engagement between a central processor and external devices, with said printed circuit board being quickly and easily removable from the electron ...


2
Jay M Prager, Joseph F Sadlow, John E Farrand, Thomas A Boissevain, Roman Y Gonzales: Modular panel construction for programmable controller. Modicon Division Gould, Mattern Ware Davis & Stoltz, July 29, 1980: US04215386 (24 worldwide citation)

By providing a plurality of input/output housings which are removably connected to a controller interconnecting duct, with each input/output housing accommodating a plurality of input/output modules that are quickly and easily removably connected thereto, an input/output assembly for a programmable ...