Improvements in or relating to mounting arrangements for small electrical components

779,260. Automatic exchange equipment. AUTOMATIC TELEPHONE & ELECTRIC CO., Ltd. June 6, 1955 [June 8, 1954], No. 16709/54. Class 40 (4). Rack mounting arrangements for similar individual equipments to which scanning potentials are applied in a co-ordinate manner has the individual equipments mounted in corresponding co-ordinate manner and a network of bare wires secured tautly within the rack and serving to apply pulses to the rows and columns of the individual equipments. The invention is illustrated by the equipment used in Specification 735,635. Individual line circuit equipments are mounted on U-shaped chassis 24 arranged on shelves in co-ordinate fashion, as shown in Fig. 1. Each chassis carries line transformer 31, inductor 33, capacitor, and several small components on insulated cards 35-37. All external connections to the line oircuit are made through vertical terminal pins 29 which are soldered to terminal pins 39 fed by wires from main rack cable 40. A network of horizontal and vertical bare wires 42-45 and 50, 51 is threaded through insulating blocks 49 and provide pulse transmission for the individual equipments. Wires 45, 50 are used for potential marking of the units and tens digits of the directory number, these markings being supplied by line scanning arrangements in common control equipment mounted on another rack with link circuits and power-pack; 100 sets of six cold-cathode tubes 54, 57 are mounted on an insulating plate 52, each set being appropriate to a trunk between the subscriber's line circuit equipment and the link circuit. Terminal pins 59 permit strapping between associated tubes in a column. Insulating strips 60 carry 7 bare conductors 64, each set forming 10 link routes multipled together and connected to a link circuit on the other rack. The strips 60 also carry resistors and capacitors 65, the latter associated with the corresponding set of tubes.