Ryohei

Claim 1

IN A TRANSPORTABLE X-RAY APPARATUS OPERABLE ON A STORAGE BATTERY AS ITS POWER SOURCE, THE IMPROVED COMBINATION COMPRISING AN INVERTER CONNECTED TO THE STORAGE BATTERY FOR CONVERTING A DIRECT CURRENT INTO AN ALTERNATING CURRENT, A TRANSFORMER HAVING ITS PRIMARY CONNECTED TO THE INVERTER OUTPUT FOR BOOSTING THE OUTPUT ALTERNATING VOLTAGE OF SAID INVERTER, CAPACITIVE MEANS FOR STORING A HIGH VOLTAGE ELECTRIC CHARGE, AN ELECTRIC CIRCUIT FOR CONNECTING SAID CAPACITIVE MEANS TO THE SECONDARY SIDE OF SAID HIGH VOLTAGE TRANSFORMER, HEATED FILAMENT RECTIFYING TUBE MEANS INSERTED IN SAID ELECTRIC CIRCUIT FOR SUPPLYING CHARGING CURRENT INTO SAID CAPACITIVE MEANS, A FILAMENT-HEATING CIRCUIT FOR SAID RECTIFYING TUBE MEANS, AN X-RAY TUBE IN THE DISCHARGE PATH OF THE CAPACITIVE MEANS, A FILAMENT-HEATING CIRCUIT FOR SAID X-RAY TUBE, A CIRCUIT-SWITCHING MEANS FOR ALTERNATELY SUPPLYING THE ALTERNATING-CURRENT OUTPUT OF SAID INVERTER TO THE PRIMARY CIRCUIT OF SAID HIGH VOLTAGE TRANSFORMER AND THE FILAMENT-HEATING CIRCUIT OF SAID RECTIFYING TUBE MEANS AND TO SAID FILAMENT-HEATING CIRCUIT OF SAID X-RAY TUBE, THEREBY CAUSING THE CHARGING OF SAID CAPACITIVE AND THE EMISSION OF X-RAY DUE TO THE DISCHARGING OF SAID CAPACITIVE MEANS THROUGH THE X-RAY TUBE TO TAKE PLACE ALTERNATELY, AN ELECTRICAL IMPEDANCE IN THE PRIMARY CIRCUIT OF SAID HIGH VOLTAGE TRANSFORMER FOR LIMITING THE INITIAL CHARGING CURRENT FOR THE CAPACITIVE MEANS FLOWING IN SAID PRIMARY CIRCUIT, AND MEANS FOR DECREASING THE IMPEDANCE VALUE OF SAID VARIABLE IMPEDANCE ELEMENT DURING THE CHARGING OF THE CAPACITIVE MEANS.