Apparatus for adjusting relays to operate and release at desired values of current

Claim 1

APPARATUS FOR ADJUSTING A RELAY HAVING AN ENERGIZING WINDING, A SWITCH, AND A PAIR OF MAGNETS FOR BIASING SAID SWITCH, ONE MAGNET FOR PRIMARILY CONTROLLING THE RELEASE SENSITIVITY OF THE RELAY, AND ONE MAGNET FOR PRIMARILY CONTROLLING THE OPERATE SENSITIVITY OF THE RELAY, COMPRISING: AN ADJUSTING YOKE, A FIRST COIL MOUNTED ON THE YOKE FOR PRIMARILY CONTROLLING THE MAGNETIZATION OF ONE MAGNET, A SECOND COIL MOUNTED ON THE YOKE FOR PRIMARILY CONTROLLING THE MAGNETIZATION OF THE OTHER MAGNET, PULSING MEANS FOR APPLYING PULSES OF ONE POLARITY TO THE COILS FOR OVERMAGNETIZING THE MAGNETS WITH RESPECT TO THE ULTIMATE MAGNETIC ADJUSTMENT AND FOR THEREAFTER APPLYING REVERSE PULSES TO THE COILS FOR DEMAGNETIZING THE MAGNETS, A CIRCUIT FOR CONTINUOUSLY CYCLING THE RELAY BETWEEN ITS RELEASE AND OPERATE CONDITIONS TO GENERATE A CONTINUOUSLY VARYING VOLTAGE REPRESENTING THE VARYING CURRENT CONDITIONS OF THE RELAY, AN OSCILLOSCOPE HAVING A SINGLE OPERATING DEFLECTION SYSTEM, CIRCUIT MEANS FOR CONTINUOUSLY GENERATING A PAIR OF VOLTAGES OF DIFFERING MAGNITUDE REPRESENTING RESPECTIVELY THE DESIRED OPERATE AND RELEASE CURRENTS OF THE RELAY, MEANS FOR CONTINUOUSLY AND ALTERNATING APPLYING SAMPLES OF THE PAIR OF VOLTAGES AND THE CONTINUOUSLY VARYING VOLTAGE TO THE SINGLE DEFLECTING SYSTEM TO PROVIDE RESPECTIVELY TWO SPACED DOT-LIKE MARKERS ON THE OSCILLOSCOPE SCREEN AND A LINEAR TRACE EXTENDING IN A PLANE COMMON TO THE DOT-LIKE MARKERS, AND MEANS FOR ADJUSTING THE PULSING MEANS TO CONTROL THE DEMAGNETIZING PULSES UNTIL THE LINEAR TRACE JUST EXTENDS FROM ONE DOT-LIKE MARKER TO THE OTHER DOTLIKE MARKER.