Zero insertion force connector system

A connector system for electrically connecting a circuit card to a circuit board, comprising:

• a. an elongated lower member made from insulating material and having a plurality of spaced apart passages extending vertically therethrough, said passages being arranged in a line running lengthwise of the lower member;
• b. a plurality of conductive contact elements positioned in the passages with the elements having an upper contact surface extending above the top surface of the lower member and a lower end extending below said member for insertion into a printed circuit board for making electrical contact with conductive traces thereon;
• c. an elongated upper member made from insulating material and having an elongated rib depending from and extending lengthwise of the underside thereof with the rib having a plurality of spaced apart lateral openings along one side, further said member having a plurality of passages extending vertically therethrough and into the rib intersecting the lateral openings therein, said upper member further having means on the upper surface thereof for securing a circuit card thereto with the card being on an edge and parallel to the passages, said upper member being received onto the top surface of the lower member with the lateral openings being in registration with the upper contact surfaces;
• d. a plurality of conductive contact elements positioned in the passages in the upper member and having card engaging contact surfaces extending above the top surface thereof for engaging conductive traces on a card which may be positioned thereon and further having lower contact surfaces positioned in the lateral openings in the rib;
• e. camming means mounted on the lower member for moving the upper member laterally on the top surface of the lower member whereupon the
• upper contact surfaces are received in the lateral openings to engage and electrically contact the lower contact surfaces positioned therein.