Abstract: Printed wiring board testing apparatus comprising means for optically scanning a board to be tested in orthogonal X-Y axes, with each Y-direction scanning a narrow strip w in the X direction. Means for processing the signals provides signals representative of the characteristics of the board along the strip and for storing the signals. Control means causes the scanning means repeatedly to scan the board in Y direction and to step it a predetermined amount in X direction at each scan end until a required board area board has been scanned and the processing means has processed groups of signals. The processing means identifies common areas of each conductive track, so finally the storage means contains information representative of the co-ordinates of a plurality of datum areas and of the datum areas which are interconnected.

Abstract: A coil winding machine comprises a mandrel on which the coil is to be wound using a wire guide device for guiding the wire on to the mandrel, first and second electrical drive means for providing rotary motion and longitudinal motion between the mandrel and wire guide device and electrical control means for controlling and synchronizing the electrical drive means.

Abstract: The invention concerns apparatus for indicating the position of a light beam relative to a target, comprising an optical system, as many linear arrays of photoelectric elements as the number of coordinates in which the position indication is sought, and an electronic circuit arrangement for processing the video output signals of the arrays, wherein the optical system forms a virtual source of the beam and special lenses form a narrow, band-like image of the virtual source on each array, and the circuit arrangement uses an integration technique for detecting the center of the distribution of the video output signals.