Orbitron vacuum pump with getter vaporization by resistance heating

Claim 1

AN ION GETTER VACUUM PUMP, COMPRISING THE COMBINATION OF A GENERALLY CYLINDRICAL CASING CONSTITUTING AN OUTER ELECTRODE, MEANS FOR CONNECTING THE INTERIOR OF SAID CASING TO A VACUUM SYSTEM TO BE EVACUATED, A CENTRAL ELECTRODE EXTENDING ALONG THE AXIS OF SAID OUTER ELECTRODE, SAID CENTRAL ELECTRODE BEING GENERALLY CYLINDRICAL AND OF A SMALL DIAMETER RELATIVE TO THE DIAMETER OF SAID OUTER ELECTRODE, MEANS FOR COMPRESSING A POSITIVE VOLTAGE BETWEEN SAID INNER AND OUTER ELECTRODES TO PRODUCE A GENERALLY CYLINDRICAL ELECTRIC FIELD THEREBETWEEN, A THERMONIC CATHODE DISPOSED BETWEEN SAID INNER AND OUTER ELECTRODES AND TOWARD ONE END OF SAID INNER ELECTRODE FOR INTRODUCING ELECTRONS INTO SAID ELECTRIC FIELD WITH INITIAL ANGULAR MOMENTUM ABOUT SAID INNER ELECTRODE, SAID ELECTRONS TRAVETING IN SPIRAL ORBITS AROUND SAID INNER ELECTRODE, AT LEAST ONE PAIR OF HEATING RODS EXTENDING LONGITUDINALLY IN THE SPACE BETWEEN SAID INNER AND OUTER ELECTRODES, SAID RODS BEING SPACED OUTWARDLY OF SAID CATHODE AND INWARDLY FROM SAID OUTER ELECTRODE, GETTER MATERIAL IN THE FORM OF TITANIUM WIRE WOUND AROUND SAID RODS, SAID RODS OF EACH PAIR BEING CONNECTED TOGETHER AT ONE END, AND MEANS FOR SUPPLYING ELECTRICAL CURRENT TO THE OPPOSITE ENDS OF SAID RODS TO CAUSE THE CURRENT TO PASS ALONG SAID RODS SO AS TO HEAT SAID RODS AND THEREBY CAUSE VAPORIZATION OF TITANIUM FROM SAID WIRE, THE EVAPORATED TITANIUM BEING CONDENSED ON THE INSIDE OF SAID OUTER ELECTRODE.