Abstract: A new crystalline maganese phosphate composition having an empirical formula: Mn3(PO4)4.2(H3NCH2CH2)3N.6(H2O). The compound was determined to crystallize in the trigonal space group P-3c1 with a=8.8706(4) Å, c=26.1580(2) Å, and V (volume)=1783 Å3. The structure consists of sheets of corner sharing Mn(II)O4 and PO4 tetrahedra with layers of (H3NCH2CH2)3N and water molecules in-between. The pronated (H3NCH2CH2)3N molecules provide charge balancing for the inorganic sheets. A network of hydrogen bonds between water molecules and the inorganic sheets holds the structure together.

Abstract: A method for separating at least one compound from a liquid mixture containing different compounds where anew crystalline manganese phosphate composition with the formula Mn3(PO4)4.2(H3NCH2CH2)3N.6(H2O) is dispersed in the liquid mixture, selectively intercalating one or more compounds into the crystalline structure of the Mn3(PO4)4.2(H3NCH2CH2)3N.6(H2O).

Abstract: The electric contact element (1c) is constituted by a substantially planar piece of metal obtained by blanking or punching, the contour of the part (11) of the element (1c) which ensures the contact with an associated contact element (socket 16, 17, 18, printed circuit board, etc.) being such that it enables the part (11) to be elastically compressed in the plane of the part, possibly after a treatment of the metal of the piece of metal (beryllium copper or the like) imparting thereto in the known manner the required elasticity after the blanking or punching operations.

Abstract: An electric contact socket (1), open at its longitudinal ends so as to be capable of receiving two aligned contact plugs (2, 3), comprises a metallic sleeve (4) provided with at least one longitudinal slot (5) which extends from one longitudinal end to the other of this sleeve and transverse slots (7) extending from the or each longitudinal slot at least approximately halfway along the length of the sleeve (4). The sleeve is encompassed by a hollow body (6) of insulating elastomer.

Abstract: The connector is formed by at least two supports (1,2) of insulating material of which at least one is of an elastic plastics material and which are assembled together with one interior face against the other interior face. The profiles of these two supports (1,2) are such that, when thus assembled, they delimit therebetween a series of cavities (4) which open onto at least one of the transverse faces of the assembly (7) of the two supports. The interior face of at least one of these supports is coated with at least one metallized track at the place of each cavity (4).

Abstract: The connection device permits the insertion of printed circuit cards without effort. Resilient contact elements have a first portion which, when subjected to the action of a first projection of a slide, urges back a movable contact portion toward the card, and a second portion which, when subjected to the opposed action of a second projection of the slide, urges back the contact portion away from the card.

Abstract: In order to connect to output pins (21) the conductive tracks carried by edge portions of a printed-circuit board (1) a connector (12) is provided with elastically-yieldable contacts (22) which connect said tracks to tracks carried by a sheet (17), the last-mentioned tracks leading to conductive pins (21).

Abstract: An electric socket for plug and socket connectors comprises resilient conducting wires. Each wire is stretched between two rigid rings and extends at rest along generatrices of one of the two families of generatrices of a hyperboloid of revolution. When a plug is inserted into the socket, it deforms the wires which are thus made to engage the plug each along a helical line. The two rings are rigidly fixed with respect to each other through metallic, relatively rigid distance-pieces, circumferentially spaced from each other. The distance-pieces are fixed symmetrically to the rings and are inclined in the same direction and by about the same angle as the adjacent resilient wires, with respect to the longitudinal axis of the socket.

Abstract: In a cabinet for electrical or electronic equipment, of the type in which the components of the equipment are mounted on vertically disposed printed circuit boards carried by supports movable on slides within a metal casing so that the supports can be easily withdrawn from the casing, the usual rigid drawer forming the support is replaced by a horizontally disposed printed circuit board movable in slides in the casing which also form connectors making electrical connection with conducting tracks on the horizontal printed circuit board. The horizontal board also carries a set of similar connectors to receive the vertically disposed printed circuit boards. The connectors are of the type whose contacts can be held open during insertion or extraction of a printed circuit board so that zero force is required for insertion or extraction.

Abstract: An electrical connection device, particularly but not exclusively for printed circuit boards, consists of a rigid insulating support for receiving a board, resilient contact members each having one end fixed relative to the support and adapted to engage resiliently, through an active region of the contact member, a respective one of a number of conductive connection tracks on the board, and a control mechanism operable alternately to open and close the contact members to allow insertion and extraction of the board. The control mechanism comprises at least one slide movable in the rigid support and each contact member comprises, between a portion forming a hinge and a movable end held or joined in fixed position in the slide, two substantially rectilinear portions which are inclined to one another and to the direction of translation of the slide and which are guided transversely by the slide, the junction of the two portions forming the active region of the contact member.

Abstract: The invention is concerned with separable electric connection devices of the kind comprising two rigid supports fitting one inside the other, e.g. a printed circuit board and a connector therefor, one support carrying at least one primary contact member and the other carrying at least one resilient secondary contact member the free end of which is movable in a direction fixed relative to its support, and mechanical means for displacing one support relative to the other in the said direction after the supports have been fitted together, to make contact between the primary and secondary contact members. In the device of the invention the mechanical means is adapted to effect such a movement in the said direction followed by a supplementary movement in a direction perpendicular to the said direction which provides a self-cleaning action on the contacts.