Circuit arrangement for storing signal values

In a circuit arrangement including a plurality of multi-position data switches and a memory connected for storing, in respective addressable memory locations, representations of the positions of the data switches, the improvement wherein each said data switch is a multi-digit coding switch having an actuating input and a plurality of code outputs at which appear a set of signals representative of the setting of said switch upon appearance of a signal at said actuating input, with successive settings of each said coding switch having successive numerical values and the signals appearing at said outputs of each said coding switch representing the numerical value of the current setting of that switch, and said arrangement further comprises:

• multiplex generator means having a plurality of clock outputs each connected to said actuating input of a respective coding switch, said generator means being arranged to produce a sequence of pulse signals and to deliver each pulse signal of the sequence to a respective clock output;
• a bus bar composed of a plurality of conductors equal in number to the number of code outputs of each said coding switch, with each said conductor being connected to a respective coding output of each said coding switch so that the appearance of a signal at said actuating input of one said coding switch causes the set of signals representative of the current setting of that said switch to appear on said conductors;
• and signal transmitting means connected between said bus bar and said memory, said signal transmitting means comprising adding means having a plurality of data inputs each connected to a respective conductor, a plurality of stages equal in number to the number of coding switches and each presenting a representation of a selected numerical value and arranged to add that representation to the numerical value representation supplied to that stage via said conductors, and a plurality of data outputs at which appear representations of the results of such additions;
• and wherein said memory has a plurality of data inputs each connected to a respective data output, and a number of memory locations equal to the number of said coding switches;
• each said clock output is connected to said adding means and to said memory for causing a pulse signal on a respective clock output to supply the numerical representation signals then appearing on said conductors to a respective associated adding stage and to address a respective associated memory location for storage therein of the representation then appearing at said data outputs;
• and the selected numerical value representation presented by each said adding means stage represents a numerical value which differs from that of every other stage by at least the number of possible settings of each said coding switch.