DATALOK

TELEMETRY AND SUPERVISORY CONTROL SYSTEMS FOR SENSING AND TRANSMITTING INFORMATION AND DATA FROM REMOTE LOCATIONS TO CENTRAL LOCATIONS, AND FOR TRANSMITTING CONTROL SIGNALS FROM CENTRAL LOCATIONS TO REMOTE LOCATIONS-NAMELY, SCANNING EQUIPMENT, ENCODERS, DECODERS, PULSE CODE MODULATORS, PULSE CODE FORMATTING EQUIPMENT, AND PREFORMATTED ILLUMINATED DISPLAY EQUIPMENT