Abstract: An electromagnet and a method for the fabrication thereof are disclosed. The electromagnet is characterized by a coil form having a relatively thin wall whereby the winding thereabout is as close as possible to a portion of the magnetic circuit. The method of this invention provides for the insertion of magnetic hollow bodies into a coil form prior to winding the coil thereabout.

Abstract: In an assembly of two component members intended to be made fast with one another with fusion bonding into one single pair, of two pairs of zones of thermo-bondable plastics material pertaining one pair to each of said two component members, the component members are of such form that, when said zones are merged into coincident portions, a closed vacant space adjacent to the coincident portions is delimited between the component members.The component members may be the body and cap of an electric valve employed in domestic equipment such as washing machines.

Abstract: A valve comprises a tube having an inner wall surface inwardly stepped to provide a ribbed peripheral seat in a plane perpendicular to the axis of the tube and between inlet and outlet chambers bounded by tube lengths of relatively greater and relatively smaller cross-sections respectively. A washer disk or resilient material sized to fit with peripheral clearance within the inlet chamber is held spaced from the peripheral step base by ribs outstanding therefrom.