Abstract: Equipment for positioning at least two pipes for connecting their ends includes at least one elongated bar of a non-circular cross section, and a plurality of plates arranged on the elongated bar and slidable on the bar in direction of its elongation, while each of the plates has edges provided with a plurality of scallop shapes of different curvatures corresponding to respective pipe diameters.

Abstract: Two tubes of thermo-plastic material are joined by a sleeve in an inner portion of which there is an electrical resistance coil, the ends of which are connected to terminals projecting from the outer surface of the sleeve. An electrical circuit supplies electric current to the coil to heat an inner weld zone to welding temperature, while leaving enveloping outer portions at lower temperature. In the sleeve there is provided a radial hole or recess into which the heated material expands upon reaching welding temperature. The material expanding into the hole or recess when welding temperature is reached is sensed by a pressure responsive micro-switch or electro-optically by an optical transmitter and receiver and through a control circuit, shuts off the power to the resistance coil. The parts being thereby fused together, are allowed to cool to complete the weld.

Abstract: Device of thermoplastic material for making a perforation in an underlying element made of a plastics material compatible with the first-mentioned plastics material.It is composed of a plate (1) of relatively slight thickness, in one face (2) of which a spiral groove (3) is formed, at the center of which the plate is provided with an opening (1'), the said spiral groove being intended to receive an electric heating wire (19) of which one end is intended to be attached to a first projection (7) carried by the plate, on the side of the face in which the said groove is formed, while its other end is intended to be attached to a second projection (10) similar to the first and situated a certain distance from the latter.Application to the making of branch pipes.

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.