Float controlled magnetically operated switch with a rod for rotating a magnet including a pair of opposed connected helices

Claim 1

A FLOAT-CONTROLLED MAGNETICALLY OPERATED SWITCH FOR USE IN A LIQUID HOLDING TANK THAT HAS A NON-MAGNETIC TOP CLOSURE, A PAIR OF CONTACTS AT LEAST ONE OF WHICH IS A LEAF CONTACT AND MAGNETIC WITH ONE END FIXEDLY MOUNTED AND WITH ITS OTHER END FREE AND RESILIENTLY FLEXIBLE TOWARD AND FROM THE OTHER CONTACT, MEANS MOUNTING SAID CONTACTS ON THE UPPER SIDE OF SAID TOP CLOSURE, A PERMANENT BAR MAGNET MOUNTED AT THE OPPOSITE SIDE OF SAID TOP CLOSURE TO ROTATE ABOUT AN AXIS, THE FREE END OF SAID MAGNETIC CONTACT BEING RESPONSIVE TO THE MAGNETIC FIELD OF THE MAGNET, PROVIDING FOR MOVEMENT OF SAID MAGNETIC CONTACT INTO AND OUT OF ENGAGEMENT WITH THE OTHER CONTACT UPON TURNING OF THE BAR MAGNET IN OPPOSITE DIRECTIONS RESPECTIVELY, AND MEANS FOR ROTATING SAID MAGNET ABOUT SAID AXIS INCLUDING AN HELICAL ROD ROTATABLE ON THE SECOND-MENTIONED SIDE OF TOP CLOSURE ABOUT SAID VERTICAL AXIS AND CONNECTED TO SAID BAR MAGNET TO TURN IT ABOUT SAID AXIS UPON ROTATION OF THE ROD, AND A FLOAT ADAPTED TO BE MOUNTED IN SAID TANK FOR MOVEMENT IN ACCORDANCE WITH THE CHANGES IN THE LIQUID LEVEL IN THE TANK AND MESHING WITH SAID HELICAL ROD TO ROTATE THE ROD UPON VERTICAL MOVEMENT OF THE FLOAT, SAID ROD HAVING PORTIONS HELICALLY TWISTED IN OPPOSITE DIRECTIONS FROM AN INTERMEDIATE POINT IN THE LENGTH THEREOF WHEREBY WHEN THE FLOAT IS MOVED ALONG SAID ROD THE MAGNETIC CONTACT WILL BE SUCCESSIVELY MOVED INTO AND OUT OF ENGAGEMENT WITH THE OTHER CONTACT.