Nozzle switches for fluid delivery systems

Claim 1

IN A NOZZLE SWITCH, A TUBULAR CONDUIT PORTION OF ELECTRICALLY CONDUCTIVE STOCK, A CYLINDRICAL ELECTRICAL CONTACT SUPPORTED ON THE OUTSIDE OF SAID TUBULAR CONDUIT AND INSULATED THEREFROM, AN OUTER SLEEVE APPROXIMATELY CONCENTRIC WITH AND SPACED FROM SAID CYLINDRICAL CONTACT WITH ITS ENDS SUPPORTED BY SAID CONDUIT PORTION BEYOND THE ENDS OF SAID CYLINDRICAL CONTACT, SAID SLEEVE BEING OF STOCK THAT IS FLEXIBLE AND A NON-CONDUCTOR OF ELECTRICALLY RESILIENT BARE CONDUCTOR MEANS BETWEEN SAID SLEEVE AND SAID CYLINDRICAL CONTACT AND NORMALLY BIASED OUT OF ENGAGEMENT WITH SAID CYLINDRICAL CONTACT, SAID CONDUCTOR MEANS INCLUDING ELECTRICALLY CONDUCTIVE CONNECTIONS WITH SAID CONDUIT PORTION, SAID CONDUCTOR MEANS SO UNDERLYING SAID SLEEVE THAT, WHEN SAID SLEEVE IS PRESSED INWARDLY TO A PREDETERMINED EXTENT IN ANY AREA IN AN ANNULAR ZONE INCLUSIVE OF SAID ELECTRICAL CONTACT, SAID CONDUCTOR MEANS IS URGED AGAINST ITS BIAS INTO CONTACT WITH SAID CYLINDRICAL CONTACT, AND A CIRCUIT INCLUDING LEADS, ONE CONNECTED TO SAID CONDUIT PORTION AND THE OTHER WITHIN SAID CONDUIT PORTION AND EXTENDING OUTWARDLY THROUGH AND INSULATED FROM SAID CONDUIT PORTION AND CONNECTED TO SAID CYLINDRICAL CONTACT.