Abstract: During plugging of a plug, plug strips of the plug partially immerse into passages of a centering strip. A metallic, electrically conductive layer is applied to the lateral faces of these passages and the shielding of the plug is provided such with spring elements that the latter press resiliently against the metallic layer in the plugged condition of the plug. Means are also provided which electrically connect to metallic layer of the individual passages to one another and to the grounded potential layer of a subrack.

Abstract: An anesthetic vaporizer comprises a housing having a liquid reservoir and a vaporizing chamber over the reservoir. A gas inlet into the housing provides for flow through a vaporizing passage and into the vaporizing chamber for subsequent flow outwardly above the chamber, through an outlet vaporizing passage, to an outlet for discharge to the place of use. The vaporizing passage includes a spirally wound wick tube disposed between an interior wall of the housing and an interior barrel of cylindrical shape which retains the tube in position. In addition a bypass passage connects the inlet to the outlet passage and a control is provided for regulating the flow through at least one of the passages so as to regulate the amount of the circulated gas which is enriched with vaporized anesthetic.

Abstract: A vaporizer for anaesthetics or narcotics comprises a housing having an interior liquid anaesthetic reservoir and an evaporation chamber above the reservoir. An inlet into the housing divides so that there is a vaporizing flow passage over and through a coiled vaporizing tube wick in an annular passage down to the liquid anaesthetic, then upwardly in a central passage and past a regulatable annular passage to a discharge passage. The inlet also includes a bypass flow through a passage which joins an annular space above the vaporizing chamber portion above the anaesthetic liquid and back to the discharge passage. A control device is located in the second or bypass passage and comprises an annular trough-shape body having a closed bottom wall which is of a material of a high coefficient of thermal expansion. A hollow cylinder is positioned in the trough-shape annular body and forms a close fit therewith and has a low coefficient of thermal expansion relative to the trough-shape body.