Male and/or female electrical connectors

An electrical connector assembly comprising an elongate female electrical connector having outlet means at one end for electrical connection to a monitoring device and having female inlet means at the other end for removably receiving the male plug of an electrical element for strong frictional engagement therewithin, said assembly comprising an outer housing sleeve having a central elongate passage forming opposed openings in said sleeve, and an inner contact-supporting elongate flat insert member which is insertable into one of said openings for locking engagement within said housing sleeve, said insert member comprising molded plastic central body portion having an integral pair of spaced elongate flexible bowed legs extending from one end thereof in the direction of the female inlet means of the connector, each of said legs having an intermediate area which is bowed in a direction towards the other to narrow the space therebetween and a free outer end which is tapered away from said intermediate area, a spaced pair of opposed contact plate-receiving retainer slots recessed within said central body, each having a depth greater than its width and opening onto the bowed surface of one of said legs, a pair of opposed elongate bowed metal contact plates each having a width greater than its thickness to provide a wide contact area for electrical connection with contacts and each having an intermediate bowed portion and a free outer end terminating in a loop portion, one each being secured to each of said elongate bowed legs, with its bowed portion in surface contact over the bowed surface thereof, and with its end loop portion in wrap-around engagement with the said free outer end of said leg and extending through a said recessed retainer slot, to provide a spaced pair of conductive passages through said plastic central body, said central body of the insert member also having electrical contact outlet means at the other end thereof, engageable through the other opening in said housing sleeve, for permitting the conduction of electricity from said contact plates through said central plastic body to said outlet means.