Printed circuit card holder

Claim 1

A PRINTED CIRCUIT CARD HOLDER COMPRISING (A) END WALLS, (B) FRONT AND REAR UPPER AND LOWER PAIRS OF RAILS ATTACHED AT THEIR END PORTIONS TO THE END WALLS, THE LOWER REAR RAIL COMPRISING (C) INNER AND OUTER SUBSTANTIALLY FLAT HORIZONTAL BARS IN WHICH THE INNER BAR IS AT A LOWER LEVEL THAN THE OUTER BAR, (D) SLOTTED WEBS CONNECTING THE ADJACENT EDGES OF THE BARS, THE LOWER FRONT RAIL COMPRISING (E) INNER AND OUTER SUBSTANTIALLY FLAT HORIZONTAL BARS IN WHICH THE INNER BAR IS ALSO AT A LOWER LEVEL THAN THE OUTER BAR, SAID INNER BAR HAVING (F) SUBSTANTIALLY UPRIGHT PERFORATIONS THERETHROUGH, (G) A GUIDE MEMBER FOR SLIDABLY RECEIVING THE LOWER EDGE OF A PRINTED CIRCUIT CARD HAVING (H) DOWNWARDLY OFFSET END PORTIONS RESTING ON THE INNER BARS, (I) TONGUES EXTENDING FROM THE OFFSET END PORTIONS, ONE SUCH TONGUE BEING A PILOT TONGUE DISPOSED IN A SELECTED SLOT OF THE WEB, (J) A RESILIENT FASTENER PROJECTING ANGULARLY DOWN FROM THE OTHER TONGUE DETACHABLY DISPOSED IN A SELECTED PERFORATION OF THE INNER BAR OF THE LOWER FRONT RAIL BY A DOWNWARDLY LEVERING ACTION OF THE GUIDE MEMBER ABOUT THE LOWER REAR RAIL, AND (K) A COMPANION GUIDE MEMBER CARRIED BY THE UPPER RAILS IN SUBSTANTIAL VERTICAL REGISTRY WITH THE FIRSTNAMED GUIDE MEMBER.