Abstract: A system is provided for polarizing electrical connectors of generally parallelepipedal shape and of the type having a male housing part adapted to be inserted in a skirt of a female housing part, one of these parts having along one wall at least one longitudinal tongue and the other of these parts having at least one corresponding groove which receives the tongue when the male housing part is fitted into the skirt of the female housing part. The free end of the tongue terminates in a bevel, the free edge of the skirt terminates in a corresponding bevel and the bevels on the tongue and on the free edge of the skirt are oriented so that, if the male housing part is not offered up in the correct position for insertion into the skirt, the bevels bear one against the other and tend to close up the opening of the skirt.

Abstract: An electrical connector housing element includes passages each receiving an electrical contact and a system for locking them. The passages are in two series each comprising two rows. The locking system includes two keys in a head-to-tail arrangement and each of which is U-shape with two branches and a core. Each key is mounted so that one of its branches lies between the branches of the other key. Inclined guides are provided in a groove whereby each key can move in the groove in two perpendicular directions. In a locking position the two branches of the first key immobilize the electrical contacts of the two first rows of the two series of passages. In the locking position the two branches of the second key immobilize the electrical contacts of the two second rows of the two series of passages.

Abstract: Female electrical contact member is made from a metal blank cut out and bent to shape so that it has at one end electrical conductor fixing elements and at the other end a rectangular section passage having a bottom wall, a top wall and two side walls from which are cut out elastic bars bent towards the interior of the passage to constitute a clamp adapted to grip a male tongue inserted through an insertion opening of the passage. The free ends of the bars face towards the insertion opening. The elastic action of the bars is strengthened by bracing bars of an attached, initially separate member cooperating with the elastic bars. The attached member comprises two plates fixed against the side walls and from which the bracing bars are cut out.

Abstract: A female electrical contact member has at one end crimping lugs and at the other end a rectangular cross-section receptacle with a floor wall and a ceiling wall. The floor wall is extended and bent towards the inside of the receptacle to form a spring strip. A male tab inserted into the receptacle is therefore clamped between this strip and the ceiling wall. A cut-out bar in the floor wall is bent so that it extends under the spring strip and cooperates with the latter.