Rotary desk top card file

Claim 1

A ROTARY CARD FILE FOR DESK TOP USE COMPRISING, (A) A HOUSING, (B) SAID HOUSING INCLUDING A PAIR OF SPACED APART SIDE WALLS AND TRANSVERSE CONNECTORS FOR MAINTAINING SAID SIDE WALLS IN SPACED RELATIONSHIP, (C) A PAIR OF SPACED APART DRUM DISCS, (D) A PLURALITY OF CARD CARRYING TRAYS INCLUDING OPPOSED PIVOT PINS CONNECTED TO AND BETWEEN SAID SPACED DRUM DISCS, (E) A SHAFT FOR ROTATABLY JOURNALLING SAID SPACED DRUM DISC AND CONNECTED TRAYS BETWEEN SAID SIDE WALLS WHEREBY ANY OF SAID TRAYS MAY BE ROTATED TO AN ACCESSIBLE POSITION, (F) MEANS INCLUDING A CONTROL RING AND CRANK ARMS FOR SWIVELLY CONNECTING SAID TRAYS RELATIVE TO SAID DRUM DISC SO THAT SAID TRAYS ARE MAINTAINED UPRIGHT THROUGHOUT THE ROTATION OF SAID DRUM DISC, (G) AND COMPRESSION SPRING DISPOSED ABOUT SAID SHAFT BETWEEN ONE OF SAID DISCS AND THE ADJACENT SIDE WALL OF SAID HOUSING WHEREBY THE FORCE OF SAID SPRING ACTING ON SAID DISC INHIBITS ROTATION OF SAID DRUM DISC AND CONNECTED TRAYS FROM THE ACCESSIBLE POSITION OF A GIVEN TRAY, (H) SAID CONTROL BEING PROVIDED WITH A PLURALITY OF PUNCHED OUT HOLES HAVING OUTWARDLY EXTENDING FLARED PORTIONS, SAID FLARED PORTIONS DEFINING A BEARING SEAT FOR THE PIVOTAL CONNECTION OF THE RESPECTIVE CRANK ARMS.