Abstract: A switch circuit and assembly for selectively connecting any one of a series of inputs each carrying a number of VHF signals to any one of a series of outputs. Each input is applied to a respective input board and each output to a respective output board, the input boards being arranged in parallel and generally perpendicular to the output boards. Connections are made between any one input board and each output board by respective pairs of interengaging terminals arranged adjacent the board edges. Isolating plates are interleaved with the boards, the plates located between the input boards extending into the spaces between the output boards, and the plates located between the output boards extending into the spaces between the input board, thereby defining a series of four sided isolating structures around each interengaging pair of terminals.

Abstract: A meter for presenting a digital display representative of an analogue input signal is disclosed in which series connected control circuits are arranged to draw current from a first constant current source, a second constant current source is connected to a respective switch in each control circuit so that when the switch is closed a current may flow from the second source to a respective control circuit, and display means such as light emitting diodes are provided for indicating the control circuit or circuits to which a predetermined current flows from the second source. The analogue input signal is applied to each control circuit to determine which of the control circuit switches is closed to enable current to flow thereto from the second source.