Abstract: Electrical distribution duct with a signal transmission bus. Two bus connection parts that can be coupled with each other and associated with the support and the connector, respectively, are provided at branch connection support distributed along the duct. The connection part associated with the support includes two elastic contacts arms, built into an insulating body, to connect to each bus wire. Thus there are two contact points for each bus wire located at the ends of arms that come into contact with a rigid contact area laid out on a tab of the connector inserted in a support slot.

Abstract: A d.c. voltage is produced from a single-phase electric mains for supplying an X-ray tube. This supply is pulsed under the control of a synchronizing circuit with which it is further possible to adjust the duration of the operating pulses, as well as their phase blocking with respect to the mains. By acting in this way excessive current is not taken during the voltage troughs between two successive half-waves. The losses by the Joule effect in the mains are reduced and the quality of the pulsed high voltage is improved because of the increased stability. There is only a slight increase in the exposure time.