Electrical tester for non-metallic linings

Claim 1

A RAPID METHOD OF DETECTING MINUTE BREAKS IN THE ON-CONDUCTING LINING OF METALLIC CHEMICAL VESSELS PROTECTED BY SAID NON-CONDUCTING LINING FROM CORROSIVE ATTACK WHICH COMPRISES APPLYING A LOW VOLTAGE SOURCE BETWEEN THE SAID METAL KETTLE AND A PARALLEL NEON GLOW TUBE CONDENSER CIRCUIT THROUG A VARIABLE RESISTANCE, SAID PARALLEL CIRCUIT BEING IN SERIES WITH S SWAB SATURATED WITH A CONDUCTING ELECTROLYTE, SAID SWAB BEING VERY SMALL IN AREA IN COMPARISON WITH THE TOTAL AREA OF THE SAID NON-CONDUCTING LINING BEING TESTED, AND MOVING THE SAID SWAB, WHILE DETACTING THE RATE OF FLASHING OF THE NEON GLOW TUBE, OVER THE AREA OF SAID NON-CONDUCTING LINING, AND DETERMINING THE LOCATION OF SAID BREAKS IN SAID NON-CONDUCTING LINING BEFORE THE SAID SWAB HAS CONTACTED SAID NEON GLOW TUBE INCREASE IN THE RATE OF FLASHING OF SID NEON GLOW TUBE WHEN MOVED OVER A DISTANCE MANY TIMES THE DIAMETER OF SAID SWAB FROM A PLURALITY OF DIRECTION RELATIVE TO SAID BREAM, THUS OBTAINING A CROSS-BEARING ON THE LOCATION OF SAID BREAK.