SPACETRAC
ELECTRONIC, ELECTRICAL AND MECHANICAL SYSTEMS FOR SELECTING, SORTING AND CONVEYING MERCHANDISE TO A DESIRED TERMINAL POINT, COMPRISING COMPUTERS, VARIABLE AND FIXED LOGIC PROGAMMABLE CONTROLLERS, ELECTRONIC SHIFT REGISTER MEMORIES, ELECTRONIC PULSE GENERATORS, SYNCHRONIZERS, SHAFT ENCODERS, SINGLE ENTRY AND DUAL ENTRY KEYBOARDS, SOLID STATE AND RELAY LOGIC CONTROL PANELS, PHOTOCELLS AND SWITCH GEAR FOR CONTROLLING STACKER AND BRIDGE CRANES, TRANSFER AND SHUTTLE CARS, TILTING TRAY AND SLAT SOR...
Expired · May 29, 1973 · 72458759 ·