US2011904A

US2011904A - Gas filled discharge tube

Info

Publication number: US2011904A
Application number: US602598A
Authority: US
Inventors: Mulder Johannes Gijsbe Wilhelm; Horst Hajo Lorens Van Der
Original assignee: Philips Gloeilampenfabrieken NV
Current assignee: Koninklijke Philips NV
Priority date: 1931-01-26
Filing date: 1932-04-01
Publication date: 1935-08-20
Anticipated expiration: 1952-08-20
Also published as: NL42082C; FR729219A; FR41744E; GB386063A; DE648516C; NL36709C; GB386111A; US2080628A

Description

Aug. 20, 1935. w MULDER ET AL 2,011,904

GAS FILLED DISCHARGE TUBE Filed Apfil 1, 1932 Inverodrra: JG.ZY/.Hulder and 1111 van deffloraf,

JFfiy.

providedwhichscreen'is connected to the supply.

of the quick ions coming from the tube 6, which This tube 8 is helically wound over part of its length l4 so a'slt'o provide an' elastic arranger, ment. Thehelix l4=is protected by'cylindrical caps l5 and I6 consisting of glass.

The anode chamber always remains Warmer than the condensation space 1, since the dis-- charge produces more heat in the anodechamber and its heat radiating surface is smaller. Also when the operating current oi the tube is switched ofi. while the incandescent cathode'remains switched on, the anode chamber remains warmer than the condensation space since-the. anode chamber is heated by the warm air'ascend- Consequently no ing from the cathode chamber. mercury will condense in this chamber.

. The metal tubes 6 and Bserveto conduct away the electric charge from the tube wall, for which purpose a proper potential is; applied to them.

Furthermore the tubes maybe used as ignition electrodes, so as materially toreduce the ignition voltage. Theymay also bexused as a. grid for influencing the discharge. a I x The tube 6 comprises an extension." which extends around the cathode and by which the ignitionis still further improved. Furthermore as shown a screen I 8, shown in cross section, may be conductor of the cathode. This screen; to which cathode potential is applied, attracts a large'pa'rt otherwise would strike the cathode. Bythis construction the life of the cathode is increased,

In order to avoid the bombardment of the-ions as much as possible, the. cathode is arranged *1 outside of the axis of thetube'G.

principle of theinventioni In'Fig. 2Qcorresponding parts are denoted by the same reference numerals as in Fig. 1,so that the operating of the parts shown therein Willi be readily understood. The difference from the form of construction referred to above essentially con-- sists in that the anode chamber I is partly sunk in "a recess I2 of the cathode'chamber owing to which the heat of the cathode chamber may still better be transferred to the anode chamber.

'Moreover acap i3 is provided by-which the ascending hotair is intercepted and whichserves 'essentiallyof two uniform cylindrical bodies inwhich serves forcatching the ions and bywhichat the'same time the heat radiation of the cathode is reduced.

In this form of construction the tubes 6 and 9' are furthermore provided with metal points 2| and-20 by which the ignition is improved.

It is also possible to use otherheating means for example a heating helix arranged around the anode chamber. Various other "forms of construction are possible without deviating What we claim is:

1'. A discharge tube comprising at least two electrodes one of. whichis an electron-emitting incandescent cathode and the other an anode, a.

chamber around'each electrode, a filling consist-.-

from the ing at least partly of a vapor, and a condensation chamber in the discharge path between the anode chamber andthe cathode chamber, the anode chamber being disposed substantially directly -abe ve the cathode chamber and the condensation chamber being,disposed sidewise with regard to the cathode chamber. I 1 2. A discharge tube'comprising an incandescible electron-emitting cathode and a chamber therefor, an anodeand a chamber therefor, a filling consisting at least partly of a vapor, a condensation chamber for the vapor disposed sidewise with regard to the anode and cathode chambers, the anode chamber partly projecting into the cathode chamber.

3. A rectifier tube;.compri'singan incandescible electron-emitting;cathode and a chamber there-' chamber forv the cathode, an anode and an anode chamber,.a filling consisting at least partly of a vapor; .a. condensation-chamber for the vapor disposed sidewise with regard toithe anodeand cathode chambers and connected to said chambars by means of metal tubes, and metal ignition rodsextendingv through said tubes into the condensation chamber. I

A rectifier tube comprising an incandescible cathode and a cylindrical chamber" therefor, an anodeand a cylindrical chamber therefor, said anode chamber being disposed on top of the cathode chamberwithout direct communication between the cathode and anode chambers, said cathode chamber having a larger diameter than the anode chamber, and an envelope surrounding said anode chamber and having substantially the same diameter. as-the cathode chamber and axially aligned therewith, and a condensation chamber disposed sidewise relative to said anode and cathode chambers and connected with both chambers, the discharge between said cathode and anode taking place through said condensation chamber.

6. A rectifier tube comprising a cathode and a chamber therefor, ananode and a chamber therefor, said anode chamber being disposed on top of said cathode chamber,and 'a condensation chamber. sidewise disposed with regard to said anode and cathode chamber and interconnected with said anode and cathodechambers respectively'by means of tubular metal members'the discharge between said cathode'and anode passing through said condensation chamber, the metal member between the condensation chamber and the cathode chamber extending within. the cathode chamber close to the cathode, said cathode being disposed outside of. the axis. of this metal member.

JOHANNES GIJSBERTUS I WILI-IELM MULDER. HAJO LORENS VAN DER HORST.