Abstract: A hinged retaining bar which engages the otherwise free edges of circuit cards when in position in a card file has an engagement face provided with slots filled with a resilient material. The resilient material provides elastic engagement with the edge of each card whereas the slot edges provide rigid restraint against lateral motion to prevent vibrational damage to the card and abrasive wear of the resilient material. A unique gripping action is attained through a particular slot geometry.

Abstract: A circuit card guide comprising an elongated channel shaped element having upstanding side walls, each with an upper reach extending inwardly in a reentrant bend and terminating in a downwardly extending lip. The reentrant bend includes portions cut away to leave a contiguous lip portion which is deformed inwardly of the guide to form a resilient leaf spring for engagement with a circuit card.