Card advancing mechanism for serial punch

Claim 1

IN A RECORD CARD HANDLING APPARATUS, MEANS FOR ADVANCING A RECORD IN A STEP-BY-STEP MANNER TO A SUCCESSION OF EQUALLY SPACED POSITIONS COMPRISING: A SAWTOOTH PLATE HAVING A PLURALITY OF EQUALLY SPACED TEETH DISPOSED ALONG A SURFACE THEREOF, EACH TOOTH HAVING A FIRST AND SECOND SURFACE; A SPRING PLATE HAVING A PLURALITY OF EQUAL SPACED SPRING MEMBERS DISPOSED ALONG A SURFACE THEREOF, SAID SPRING MEMBERS CORRESPONDING IN NUMBER TO SAID TEETH; CONNECTING MEANS CONNECTING SAID SAWTOOTH PLATE TO SAID SPRING PLATE WHEREBY EACH SPRING MEMBER IS DISPOSED ADJACENT THE SECOND SURFACE OF A TOOTH OF SAID SAWTOOTH PLATE; FEEDING MEANS FOR INSERTING RECORD CARDS BETWEEN SAID TEETH AND SAID SPRING MEMBERS IN A POSITION TO CAUSE THE TRAILING EDGE OF SAID RECORD CARD TO CONTACT THE FIRST SURFACE OF ONE OF SAID TEETH AND BE HELD IN SUCH A POSITION BY THE ASSOCIATED ONE OF SAID SPRING MEMBERS; DRIVE MEANS COUPLED TO SAID PLATES TO ALTERNATELY MOVE SAID PLATES IN FIRST AND SECOND OPPOSITE DIRECTIONS; SELECTIVELY OPERABLE RESTRAINING MEANS DISPOSED ADJACENT SAID PLATES AND SAID RECORD CARD AND OPERABLE TO ENGAGE SAID RECORD CARD THEREBY PREVENTING MOVEMENT OF SAID RECORD CARD WHEN OPERATED; AND CONTROL MEANS COUPLED TO SAID RESTRAINING MEANS TO SELECTIVELY OPERATE SAID RESTRAINING MEANS WHEREBY SAID RECORD CARD IS MOVED WITH SAID PLATES TO ADVANCE SAID RECORD CARD WHEN SAID PLATES ARE MOVING IN A FIRST DIRECTION AND TO PERMIT RELATIVE MOTION BETWEEN SAID PLATES AND SAID RECORD WHEN SAID PLATES ARE MOVING IN A SECOND DIRECTION TO PLACE SAID RECORD CARD IN CONTACT WITH THE TOOTH ADJACENT TO SAID ONE TOOTH AND IN THE DIRECTION OF RECORD CARD ADVANCE.