DE2546189

An improved socket for blade-type electrical contacts which is simple to manufacture, has a high degree of electrical contact reliability and mechanical retention strength, and yet is small in comparison with prior art sockets. The socket is preferably affixed to a printed circuit board, either directly or by means by an intermediate mounting plate for receiving the contact pins of a standard DIP circuit element. In the printed circuit board or intermediate mounting plate, bores are provided in which the contact sockets are inserted. The sockets are prevented from rotation within the bore by crimping the socket and soldering it to the conductor side of the printed circuit board. Each contact socket has an entry end for receiving a blade-type contact pin and an opposite end remote from the entry end. The socket is in the form of an elongated tube with a constriction formed between its ends, the constriction having a configuration complementary to the shape of the contact pin but rotated at an angle relative to the orientation of an inserted pin, thereby effecting a retentive torqueing force between the socket and the pin at the area of constriction. When used with a standard DIP circuit element, each row of sockets has an elongated rectangular cross section at the constriction point oriented at an acute angle with respect to a plane passing through the row of sockets. The angles of orientation of the constricted areas in one row of sockets is opposite that of the other row.