Device responsive to magnetic bodies and magnetic fields

Claim 1

A DEVICE FOR PRODUCING ELECTRIC PULSES IN RESPONSE TO MAGNETIZABLE BODIES, COMPRISING IN COMBINATION: A MAGNET HAVING A FIRST PAIR OF POLE SHOES; A SECOND PAIR OF POLE SHOES DISPOSED BETWEEN THE FIRST PAIR OF POLE SHOES; AT LEAST ONE PAIR OF LEGS OF MAGNETICALLY SATURABLE MATERIAL EXTENDING IN THE FIELD OF THE MAGNET BETWEEN THE SECOND PAIR OF POLE SHOES, SAID SECOND PAIR OF POLE SHOES BEING SEPARATED FROM THE FIRST PAIR OF POLE SHOES TO PROVIDE FOUR SPACES BETWEEN THE FIRST PAIR OF POLE SHOES AND THE SECOND PAIR OF POLE SHOES, WHICH SPACES ALLOW A SUBSTANTIAL PORTION OF THE MAGNETIC FIELD OF THE MAGNET TO PASS OUTWARDLY FROM AT LEAST ONE OF SAID SPACES AND PERMIT FLUX FROM THE MAGNET TO PASS IN THE SAME DIRECTION THROUGH THE LEGS IN THE PRESENCE OF A MAGNETIZABLE BODY NEAR SAID SPACE; AN EXCITER CIRCUIT SUPPLIED WITH A PULSATING CURRENT AND ARRANGED ON THE LEGS FOR GENERATING A FLUX TO PERIODICALLY SATURATE THE LEGS IN OPPOSITE TO EACH OTHER, SO THAT FLUX FROM THE MAGNET PASSING THROUGH THE LEGS IN THE PRESENCE OF A MAGNETIZABLE BODY NEAR SAID SPACE IS CHOPPED BY THE PERIODIC SATURATION OF THE LEGS; AND AN INDUCTION CIRCUIT ARRANGED ON THE LEGS, SAID CHOPPED MAGNETIC FLUX PERIODICALLY INDUCING A VOLTAGE PULSE IN THE INDUCTION CIRCUIT TO INDICATE THE PRESENCE OF A MAGNETIZABLE BODY NEAR SAID SPACE.

Claim 2

A DEVICE FOR PRODUCING ELECTRIC PULSES IN RESPONSE TO MAGNETIZABLE BODIES, COMPRISING IN COMBINATION: A MAGNET HAVING A FIRST PAIR OF POLE SHOES; A SECOND PAIR OF POLE SHOES DISPOSED BETWEEN THE FIRST PAIR OF POLE SHOES; AT LEAST ONE PAIR OF LEGS OF MAGNETICALLY SATURABLE MATERIAL EXTENDING IN THE FIELD OF THE MAGNET BETWEEN THE SECOND PAIR OF POLE SHOES, SAID SECOND PAIR OF POLE SHOES BEING SEPARATED FROM THE FIRST PAIR OF POLE SHOES TO PROVIDE FOUR SPACES BETWEEN THE FIRST PAIR OF POLE SHOES AND THE SECOND PAIR OF POLE SHOES, WHICH SPACES ALLOW A SUBSTANTIAL PORTION OF THE MAGNETIC FIELD OF THE MAGNET TO PASS OUTWARDLY FROM AT LEAST ONE OF SAID SPACES AND PERMIT FLUX FROM THE MAGNET TO PASS IN THE SAME DIRECTION THROUGH THE LEGS IN THE PRESENCE OF A MAGNETIZABLE BODY NEAR SAID SPACE; AN EXCITER CIRCUIT SUPPLIED WITH A PULSATING CURRENT AND ARRANGED ON THE LEGS FOR GENERATING A FLUX TO PERIODICALLY SATURATE THE LEGS IN OPPOSITE TO EACH OTHER, SO THAT FLUX FROM THE MAGNET PASSING THROUGH THE LEGS IN THE PRESENCE OF A MAGNETIZABLE BODY NEAR SAID SPACE IS CHOPPED BY THE PERIODIC SATURATION OF THE LEGS; AND AN INDUCTION CIRCUIT ARRANGED ON THE LEGS, SAID CHOPPED MAGNETIC FLUX PERIODICALLY INDUCING A VOLTAGE PULSE IN THE INDUCTION CIRCUIT TO INDICATE THE PRESENCE OF A MAGNETIZABLE BODY NEAR SAID SPACE.