Multi-feed knitting machine

Claim 1

A CIRCULAR KNITTING MACHINE FOR LADIES'' HOSIERY, COMPRISING A ROTARY NEEDLE CYLINDER AND NEEDLES AND JACKS CARRIED THEREBY, SAID NEEDLES HAVING LONG AND SHORT BUTTS AT ONE LEVEL, SAID JACKS HAVING A PLURALITY OF BUTTS AT AT LEAST TWO LEVELS, AT LEAST FOUR FEED STATIONS DISPOSED AT SPACED LOCATIONS CIRCUMFERENTIALLY OF SAID CYLINDER, CAM MEANS OPERABLE TO ENGAGE SAID BUTTS TO DISPLACE SAID NEEDLES BETWEEN ELEVATED LATCH-CLEARING AND TUCK LEVELS AND A LOWER STITCH-DRAW LEVEL, EACH SAID FEED STATION INCLUDING AT LEAST ONE FEED FINGER OPERABLE TO ENGAGE A YARN WITH THE NEEDLES DISPOSED AT AN ELEVATED LEVEL AT SAID FEED STATION, MEANS TO EFFECT RELATIVE ROTARY TRAVEL OF SAID NEEDLES AND JACKS IN ONE DIRECTION PAST SAID FEED STATIONS AND CAM MEANS, SAID CAM MEANS INCLUDING A FIXED STITCH CAM AND A SUBSEQUENT FIXED ELEVATING CAM SURFACE OPERABLE UPON SAID NEEDLE BUTTS AT EACH FEED STATION, EACH STITCH CAM AND ELEVATING CAM SURFACE IN ITS CRITICAL AREA BEING IDENTICAL IN CONTOUR AND MOUNTED AGAINST DISPLACEMENT DURING ROTATION OF SAID CYLINDER, SAID CAM MEANS PROVIDING A PATH FOR THE BUTTS OF SELECTED NEEDLES DISPOSING SAID SELECTED NEEDLES BELOW SAID ELEVATED LATCH-CLEARING AND TUCK LEVELS IMMEDIATELY IN ADVANCE OF THE STITCH CAMS AT AT LEAST THREE OF SAID FOUR FEED STATIONS WHEREBY SAID SELECTED NEEDLES ARE NOT ENGAGED WITH YARN AT SAID STATIONS JACK SLIDE MEANS COOPERABLE WITH SAID PATH AND EFFECTIVE UPON THE BUTTS OF THE JACKS TO SELECT THE NEEDLES FOR TRAVEL IN SAID PATH AT EACH OF SAID THREE STATIONS AND A RADIALLY DISPLACEABLE NEEDLE CAM SLIDE IN REGISTRY WITH THE JACK SLIDE MEANS AT EACH OF SAID THREE STATIONS, SAID NEEDLE CAM SLIDES OPERABLE STEPWISE TO ENGAGE THE NEEDLE BUTTS AND DISPLACE THEM OUT OF THE SAID PATH TO THEREBY CANCEL THE SELECTION EFFECTED BY SAID JACK SLIDES AT EACH OF SAID THREE STATIONS.