Abstract:
A temperature responsive thermionic gas switch having folded electron emitting surfaces. An ionizable gas is located between the emitter and an interior surface of a collector, coaxial with the emitter. In response to the temperature exceeding a predetermined level, sufficient electrons are derived from the emitter to cause the gas in the gap between the emitter and collector to become ionized, whereby a very large increase in current in the gap occurs. Due to the folded emitter surface area of the switch, increasing the "on/off" current ratio and adjusting the "on" current capacity is accomplished.
Abstract:
A DC gas discharge display panel is described, having a cathode which is formed by depositing a metal and/or a metal compound on a substrate of the DC gas discharge display panel or a cathode substrate by the application of plasma spray utilizing plasma generated by the discharge of a rare gas, or a mixed gas of a rare gas and hydrogen and/or nitrogen.
Abstract:
A highly sensitive Geiger-Mueller radiation detector with improved temperature stability and working life uses a cathode liner made of tungsten. The liner is resistant to attack by the halogen quench gases which are used in the detector. The method of conditioning the tube for use is much simpler and less expensive than it is for existing tubes.
Abstract:
Restorable cold cathode in a gas discharge electron ion gun in which the eroded material in the active surface of the cathode is restored by supplying new material in the form of a wire which is moved through a hole in the cathode body by means of a screw spindle.
Abstract:
A dual cathode structure for a fluorescent lamp comprising a pair of electron emissive cathodes which are connected with a common junction and mounted to have an included angle therebetween. An anode flag is connected to the common junction to collect electrons when the filaments are operating in the anode half cycle. The collected electrons pass through one or both of the cathodes to diffuse the hot spot on the electrode. The lamp operates with reduced wattage with no decrease of light output.
Abstract:
A glow discharge tube for atomic light-absorption analysis in which a hollow cathode for producing atomic light-absorption lines comprises a molded article of fine powder containing at least one metal element which produces the atomic lightabsorption lines, the article being molded without heating it whereby the dislocation of atomic distance remains in the crystalline lattice to improve the sputtering rate of the metal atom so that the density of metal atoms in the hollow of the hollow cathode is increased to enhance the light intensity of the atomic light-absorption lines.
Abstract:
A hollow cathode lamp of the type used as a source of spectral radiation characteristic of the materials within the hollow cathode. More particularly, the cathode is comprised of a body of material of which a characteristic radiation is desired having hollow within a front surface and an electrical conductive sleeve member surrounding said cathode body and extending beyond the front surface of the cathode body and electrically interconnected with the cathode lead-in.
Abstract:
A mounting ring and method is described for referencing the cathode to the reflector in a short arc lamp, and the cathode/reflector to the anode and the lamp exterior. A reference plane is formed on the mounting ring. One or more planes parallel to this reference plane are formed in a brazing fixture and spaced so that the tip of the cathode is at a controlled distance from the reference plane. The same reference plane or one parallel to it is used to control positioning of the anode and lamp exterior. Axial concentric surfaces are formed on the ring and on at least one cylinder in the brazing fixture to control concentricity of the ring, cathode and reflector, and of the ring, anode and lamp exterior. When two or more cylinders are used, surfaces on a first cylinder can be made to expand at the same rate as the ring, with one surface constrained at brazing temperature by a concentric surface on a second cylinder which expands at substantially the same rate as the electrode.
Abstract:
An ultraviolet detector in which the electrode configuration is non-symmetrical in that one electrode operates permanently as the emitter and the other as the collector, at least one of the electrodes supported by the inner surface of the tube envelope and offering an expansive wide angle field of view for incoming ultraviolet radiation. The electrodes are DC biased to provide a high voltage difference therebetween, i.e., between cathode, or emitter, and anode or collector, the former responsive to each photon of ultraviolet energy incident from within the wide angle.
Abstract:
A light source lamp for atomic light-absorption analysis comprising a structure constituted by a molded body of fine metal wires having a relatively high-melting-point which are mechanically closely linked with each other having a metal having a relatively low-melting-point impregnated in the gaps between the fine wires, wherein the metal of a low-melting-point is continuously fed to a hollow portion through the gaps between the fine wires while maintaining the contour of the structure by virtue of the frame composed of the fine metal wires of a highmelting-point, thereby making it possible to produce a high light-intensity resonance line of the low-melting-point metal which is stabilized for a long time.