Analysis of information sources in references of the Wikipedia article "NORBIT" in English language version.
[…] ready-assembled circuit modules can cut down development time spent on a control-engineering or data processing problem by eliminating the work of designing individual circuits. A particular range made by Mullard are slim colour-coded plastics "boxes" of guaranteed performance specifications covering the commonly used circuit functions. Typical units are AND/OR gates, timing and relay-operating circuits called "Norbits" (for control purposes) and flip-flop, pulse shaper and inverter-amplifier stages called Combi elements (for digital circuits). By giving only a performance specification the manufacturers can take advantage of advances in techniques (for instance, complete solid-state circuits) without, at the same time, rendering obsolete existing apparatus. Transistors are used throughout, so that battery operation is reasonably economical, and the modules are designed to connect together compatibly in a manner suited to their functions. Norbits have long, flexible flying leads for use with terminal blocks while Combi-elements have short, stiff tinned wires suitable for fitting into printed wiring boards. […]
[…] Another point noticed was the widespread use of small-package solid-state logic (such as "and," "or," "not") and instrumentation (timers, amplifiers, etc.) units. There would seem to be a good case here for the various manufacturers to standardise practical details such as mounting, connections and power supplies so that a Siemens "Simatic," say, is directly interchangeable with an Ateliers des Constructions Electronique de Charleroi "Logacec," a Telefunken "Logistat," or a Mullard "Norbit" or "Combi-element." […]
[…] COMPONENTS AND MATERIALS (GREEN SERIES) […] Part 1 - July 1979 - CM107-79 - Assemblies for industrial use PLC modules, high noise immunity logic FZ/30 series, NORbits 60-series, 61-series, 90-series, input devices, hybrid integrated circuits, peripheral devices […]
[…] COMPONENTS AND MATERIALS (GREEN SERIES) […] Part 1 - July 1979 - CM107-79 - Assemblies for industrial use PLC modules, high noise immunity logic FZ/30 series, NORbits 60-series, 61-series, 90-series, input devices, hybrid integrated circuits, peripheral devices […]