Abstract: The method and the arrangement for the connection of a multipole connector to a circuit board (1), specifies that the circuit board (1) is provided with a plurality of blind holes (3), equivalent in number to and matching the location of terminals (4) extending out of the connector housing (2). The blind holes (3) are filled with solder paste (5) and the mechanical and electrical connection of the connector (2) with the circuit board (1) is carried out by reflowing the solder paste. Compared with the conventional technique utilizing through-drilled connection holes, the invention provides the advantage that conductor paths can be routed underneath the blind holes, soldering paste cannot get on the underside of the circuit board, and a tolerance compensation of the lengths of the terminals is insured without subjecting the circuit board to preload forces exerted by the terminals.

Abstract: A daughterboard connector (6) has a polarity key formed by two walls (14, 15) on either side of a recess (12). A lateral contact (8) mounted in the recess engages a bus bar (3, 4) which is mounted in a pair of slots (20) in the end of a motherboard connector (11). A flange (7) adjacent one of the slots forms a polarity key for the motherboard connector. The height and positioning of the lateral contact and the bus bar are chosen to provide a first-make-last-break function for these elements relative to the signal contacts 19 and 16 of the daughterboard and motherboard connectors, respectively. The bus bar (3, 4) may be common to a number of motherboard connectors which are mounted on a common printed circuit board.

Abstract: An incremental angular encoder includes a device for the selected setting of an absolute zero reference pulse. The device consists of a reduction mechanism 16, which is connected on the input side to the shaft 11 of the angular encoder and, on the output side, to an output disk 18 which has an opto-electronically scannable hole or light reflection mark 19. The disk 18 is provided with gear teeth 23 and is connected by a friction clutch 17 to the reduction unit 16. The angular position of the output disk 18 can be adjusted relative to the reduction mechanism 16 by means of a toothed key 22 provided with a pinion, allowing the absolute zero point to be exactly set. By selection of the gear wheels (R.sub.1, R.sub.2, R.sub.3, R.sub.4) of the reduction mechanism 16, the reduction ratio can be varied within wide limits and, consequently, the absolute zero point can be set over a wide range.