Yarn feed calculator

Claim 1

APPARATUS FOR INDICATING THE LENGTH OF YARN FED FROM A SOURCE OF YARN TO THE KNITTING MECHANISM OF A KNITTING MACHINE DURING A PREDTERMINED NUMBER OF KNITTING COURSES OF THE KNITTING MACHINE, COMPRISING A YARNDRIVEN ELECTRICAL SWITCH MEANS FOR CLOSING AN ELECTRICAL CIRCUIT IN RESPONSE TO THE MOVEMENT OF A PREDETERMINED LENGTH OF YARN FROM SAID SOURCE TO SAID KNITTING MECHANISM, A SOURCE OF ELECTRICAL ENERGY, A FIRSTT ELECTRICAL IMPULSE COUNTER, FIRST MEANS FOR SERIALLY INTERCONNECTING SAID SOURCE OF ELECTRICAL ENERGY, SAID YARN-DRIVEN ELECTRICAL SWITCH MEANS AND SAID FIRST ELECTRICAL IMPULSE COUNTER, SAID SERIALLY INTERCONNECTING MEANS INCLUDING A LATCHABLE ELECTRICAL SWITCH MEANS INCLUDING A CONTROL MEANS WHICH IS ENERGIZED TO CLOSE AN ELECTRICAL CIRCUIT FROM SAID SOURCE OF ELECTRICAL ENERGY TO SAID FIRST ELECTRICAL IMPULSE COUNTER ONLY AFTER THE RECEIPT OF A PULSE OF ELECTRICAL ENERGY AT SAID CONTROL MEANS, A MECHANICALLY OPERATED SWITCH MEANS WHICH IS OPERATIVELY COUPLED TO THE KNITTING MACHINE TO CLOSE AT LEAST ONCE DURING EACH KNITTING COURSE, SECOND MEANS FOR SERIALLY INTERCONNECTING SAID MECHANICALLY OPERATED SWITCH MEANS, SAID SOURCE OF ELECTRICAL ENERGY AND THE CONTROL MEANS OF SAID LATCHABLE ELECTRICAL SWITCH MEANS SO THAT ELECTRICAL ENERGY IS TRANSMITTED TO SAID CONTROL MEANS AT LEAST THE FIRST TIME SAID MECHANICALLY OPERATED SWITCH MEANS CLOSES WHILE SAID LATCHABLE ELECTRICAL SWITCH MEANS IS DEENERGIZED, A SECOND ELECTRICAL IMPULSE COUNTER, THRID MEANS FOR SERIALLY INTERCONNECTING SAID SOURCE OF ELECTRICAL ENERGY, SAID MECHANICALLY OPERATED SWITCH MEANS AND SAID SECOND ELECTRICAL IMPULSE COUNTER WHEREBY EACH TIME SAID MECHANICALLY OPERATED SWITCH MEANS CLOSES A PULSE OF ELECTRICAL ENERGY IS RECEIVED BY SAID SECOND ELECTRICAL IMPULSE COUNTER, AND DEENERGIZING MEANS CONNECTED TO SAID SECOND ELECTRICAL IMPULSE COUNTER FOR DEENERGIZING SAID LATCHABLE SWITCH MEANS WHEN SAID SECOND ELECTRICAL IMPULSE COUNTER COUNTS A NUMBER OF ELECTRICAL PULSES RELATED TO THE PREDETERMINED NUMBER OF KNITTING COURSES.