Ion source for mass spectrometer

Claim 1

AN ION SOURCE, FOR A MASS SPECTROMETER, COMPRISING, IN COMBINATION, A CASING FORMED WITH A PAIR OF LATERALLY SPACED HOLLOW SIDES, THE WALLS OF BOTH SIDES BEING FORMED WITH FIRST APERTURES ALL OF WHICH ARE LATERALLY ALIGNED, THE INNER WALLS OF SAID SIDES DEFINING A CHAMBER RECEIVING SPACE THEREBETWEEN, MEANS FORMING A FIRST ELECTRODE SYSTEM FOR PRODUCING SUBSTANTIALLY EQUAL ENERGY IONS FROM SAMPLES WITH A HIGH VAPOR PRESSURE, SAID FIRST ELECTRODE SYSTEM INCLUDING A PAIR OF ELECTRODE COMPONENTS EACH WITHIN A HOLLOW SIDE AND ALIGNED TO DIRECT AN ELECTRON BEAM THROUGH SAID ALIGNED FIRST APERTURES ACROSS SAID SPACE, AN IONIZATION CHAMBER POSITIONABLE WITHIN SAID SPACE FOR COOPERATION WITH SAID FIRST ELECTRODE SYSTEM, SAID IONIZATION CHAMBER INCLUDING SIDE WALLS CLOSELY EMBRACED BY THE INNER WALLS OF SAID CASING SIDES, EACH OF SAID SIDE WALLS BEING FORMED WITH A SECOND APERTURE AND SAID SECOND APERTURES BEING ALIGNED WITH EACH OTHER AND WITH SAID FIRST APERTURES, MEANS IN SAID IONIZATION CHAMBER FORMING A SECOND ELECTRODE SYSTEM FOR PRODUCING IONS FROM SAMPLES WITH A SUBSTANTIALLY LOW VAPOR PRESSURE, MEANS FOR SELECTIVELY ENERGIZING BOTH OF SAID SYSTEMS WHEREBY SAID SYSTEMS CAN BE OPERATED EITHER INDEPENDENTLY OF EACH OTHER OR SIMULTANEOUSLY TO PRODUCE IONS FROM SAMPLES WITH A HIGH VAPOR PRESSURE, FROM SAMPLES WITH A SUBSTANTIALLY LOW VAPOR PRESSURE, OR FROM MIXTURES OF HIGH VAPOR PRESSURE SAMPLES AND LOW VAPOR PRESSURE SAMPLES, AND MEANS, INCLUDING SAID IONIZATION CHAMBER, SHIELDING SAID SYSTEMS FROM EACH OTHER.