Fill-height inspection device for fluid in bottles

Claim 1

A SYSTEM FOR DETERMINING WHETHER A BOTTLE PASSING THROUGH AN INSPECTION ZONE HAS BEEN PROPERLY FILLED WITH A LIQUID COMPRISING MEANS, AT ONE SIDE OF SAID INSPECTION ZONE, FOR ILLUMINATING THE PREDETERMINED REGION OF A BOTTLE TO BE INSPECTED, A FIRST AND SECOND PHOTOCELL MEANS POSITIONED AT A SIDE OF SAID INSPECTION ZONE OPPOSITE TO SAID ONE SIDE, SAID FIRST PHOTOCELL MEANS BEING POSITIONED TO RECEIVE ONLY REFRACTED LIGHT FROM THE LIQUID IN A BOTTLE AT A LEVEL WHICH IS JUST BELOW A PREDETERMINED MINIMUM ACCEPTABLE LIQUID LEVEL IN SAID BOTTLE, SAID SECOND PHOTOCELL MEANS BEING POSITIONED TO RECEIVE ONLY REFRACTED LIGHT FROM THE LIQUID IN A BOTTLE AT A LEVEL WHICH JUST EXCEEDS A PREDETERMINED MAXIMUM ACCEPTABLE LIQUID LEVEL IN SAID BOTTLE, INOPERATIVE BOTTLE-REJECTING MEANS, MEANS RESPONSIVE TO ILLUMINATION OF SAID SECOND PHOTOCELL MEANS WHEN A BOTTLE IS IN SAID INSPECTION ZONE FOR OPERATING SAID BOTTLE-REJECTING MEANS, AND MEANS RESPONSIVE TO A FAILURE TO ILLUMINATE SAID FIRST PHOTOCELL MEANS WHEN A BOTTLE IS IN SAID INSPECTION ZONE FOR ACTIVATING SAID BOTTLE-REJECTING MEANS, A CAPACITOR, MEANS FOR CHARGING UP SAID CAPACITOR, A MEANS RESPONSIVE TO SAID PHOTOCELL BEING ILLUMINATED FOR DISCHARGING SAID CAPACITOR, A SINGLE-POLE DOUBLE-THROW SWITCH MEANS HAVING A STANDBY POSITION FOR CONNECTING TO SAID CAPACITOR SAID MEANS FOR CHARGING UP SAID CAPACITOR AND SAID MEANS RESPONSIVE TO SAID PHOTOCELL BEING ILLUMINATED FOR DISCHARGING SAID CAPACITOR AND HAVING AN OPERATED POSITION FOR CONNECTING SAID CAPACITOR TO SAID BOTTLE-REJECTING MEANS, AND MEANS FOR OPERATING SAID SWITCH MEANS TO ITS OPERATED POSITION AS A BOTTLE LEAVES SAID INSPECTION ZONE WHEREBY SAID BOTTLEREJECTING MEANS IS OPERATED IF SAID CAPACITOR HAS NOT BEEN DISCHARGED.