US2459284A - Device comprising a current converting tube - Google Patents
Device comprising a current converting tube Download PDFInfo
- Publication number
- US2459284A US2459284A US685208A US68520846A US2459284A US 2459284 A US2459284 A US 2459284A US 685208 A US685208 A US 685208A US 68520846 A US68520846 A US 68520846A US 2459284 A US2459284 A US 2459284A
- Authority
- US
- United States
- Prior art keywords
- cathode
- screen
- tube
- anode
- anodes
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J17/00—Gas-filled discharge tubes with solid cathode
- H01J17/50—Thermionic-cathode tubes
- H01J17/52—Thermionic-cathode tubes with one cathode and one anode
- H01J17/54—Thermionic-cathode tubes with one cathode and one anode having one or more control electrodes
Definitions
- This invention relates to a device comprising a current converoing tube having a filling of gas 01 of vapour er of both, in Which a cathodescreen is provided between the cathode and one or more anode.
- lt is a1ready known to connect a screen, which is placed between cathode and anode, to one of he anodes through a resistance. This, however, has the dravvback of the full voltage being set up between this screen and the cahode in the negative phase, which may involve a very streng glowing current between these electrodes.
- the present invention purports to eure these drawbacks by connecting the cathode screen of the tube so a potentiometer or voltage-divider connected between the cathode and one of the anodes.
- the current from the cathode to the screen ionizes the gas at a comparatively W voltage which depends on the filling of the taube.
- charge carriers readi1y enter the range of the anode fie1d in substantia1 quantity.
- the paths of the gaseous medium so the screen and anode are ionized simultaneously.
- t0 use the in" vention in tubes for more than volts effective anode voltage anal et least 10 amperes rec'cified current, in which the screens between the cathode and the anodes are provided in such a manner that at the ful1 operating voltage the tube does not exhibit, arcing back ab every cathode temperature lower than Ehe normal.
- the cathode screen or parts thereof are provided With holes on the side facing the one or more anodes, which holes do not serve for the passa.ge of the main discharge anti therefore de not amount to more than 5% 0f the a.perture distant for the last-mentioned discharge, in such a manner that particles disintegrating from the cathode cannot find their way to the anodes.
- Betaveen the anodes is placed a screen consisting cf meta1 she-et Whose rounded front side is c1osed to ehe cathode screen, the screens being arranged about the cathode in such manner that particles, for instance of electron-emitting material, issuing from the cathode do not have a velocity compunent in the direction of the anode even after a reflection.
- the current converting tubes tha are the object of the present invention often have ab the bottom side a metal hood Icr taking up the stank 0f vapor-producing material, usually mercury.
- the metal hood is advantageousiy furnished With cooling ribs in order to maintain the temperature cf the mercury as 10W es possible. It is particularly simple anc1 cheap to mount ehe resistances of the voltage-divider on the cooling ribsso that the user of the t-ube need not bother aboutthese parts and may connect the tube in the same manner as tubes without cathode scr een or those where the cathode screen is internally connected to the cathode.
- Figures 1a, 1b anal 1c are of vertical section, a bottom view and a horizontal section respectively of a tube having two ahndes in which the cathode screen is connected through a VON:- age-dividler to one of the anodes, Figu1es 2a 2b and 2c being respectively a, vertical anal a horizontal section of the cathode screen of the tube, in which ehe cathode screen is divided into two parts, and a bottom view of this tube.
- the current converting taube shown in Figure 1 comprises a glass discharge vessel l, in which the ca.thode 2 and the anodes 3 are providecl in the same way by means cf terminal wires 4 and 5 which, through the intermediary of chrome iron hoods 6 and i are sealed in a vacuum-tight manner into Ehe ends of the tube.
- Bach anode is surrounded by a screen 8 partly consisting of meta1 gauge und. shielding the inactive part of the anocles.
- the terminal wires are surrounded by the ceramic protecting tubes 9 and H3 which the cathode.
- the parts corfesponding to Figure 1 bear the same reference numeralg as in Figure l.
- the cylindrical part of the cathode screen is divided into two parts 13' each of which corresponds to one of the two anodes and is secured to a terminal protecting tube of The two -ha1ves !3' slightly 0ver 1ap ea ch other so thas disturbances on account of electron emitting material disintegrating frm th'ecachude are avoided.
- the cov ar I4 of the cathode screen is separately secured to the insulating terminal tubes.
- the Voltagedivider is also constructed double and the chrome iron hood H is centrally positioned.
- a gaseous discharge current converting taube comprising a c1osed vesse1 haVing a gaseous filling, and containing a cathode, a plurality of anodes, anal a cathorle screen mounted between the cathode anal the anodes, the cathode screen havin a number of 'sections corresponding to the number of anoxies, a voltage-divider comnected between the cathode and each anode, anal meai1s connecting each cathode screen section to an intermediate point of the corresponding voltage-divider between the cathode an d the asso- I ciated anode.
- the T'WO cathode inlet5 are furnished with copper connecting leads K6.
- a chrome iron hood IT containing the stock oI mercury I8 which is protected by the screen 593 from the thermal radiation f1om he taube.
- the chrome iron hoocl H hag secured to it a cooling rib 20 by Which it is ensured that the temperature of the mer cury E3 on1y slig'htly exceeds room temperature.
- On the rib 22 are mounted two resistances 21 an. 22 jointly consticuting the voltage-divider between the eathode and. one of the anodes.
- the resistance 2! is directly electrically connected to the rib 22.
- the resistance 22 is insulated from the rib 20 by meang cf two insulating plates 23.
- a wire 241 connects the two resistances to the inlet 15 of the screen.
- the wires 26 and 27 are connected respectively tc the centre f the hQJ* ing Winding of the supply for the device com- 2.
- a gaseous discharge tube comprising a closecl vessel having a. gaseous filling, and containing a cathode and an anode, conducting supports f01 the cathode exaending through the wa1l ofthe Vessel and into the immer space in the vessel,
- insulating tubes covering the supports to substantially the termin'als of the cathode a Cathode sCreen substanti'ally enclosing the cathode, means supporting the cathode screen onthe in sulating tubes and insulated from Ehe cathode,
- the tubes prising the currentconverting tube and 110 one of the anode terminals of the taube.
- the nuts 25 serve to secure the resistances and the counecting wires.
- The, cathode screen is provided W1'th Tour ignition ho1es 29 by which the ignition of the anode current is facilitated.
- the tube also has a'filling of und p0tent-iometer resistance vmeans interconnecting said. anode, cathode and cathode screen for maintaining the potential of the cathode screen at a value between the potentials of the cathode and of the anode.
- a gaseoug dscharge current converting taube comprising a closed vessel having a gaseous fi11- ing, and containing a cathode an anode and a screen fr the cathode, a metallic cup secured in v the base of the Bube td communicate With the tube, a globule of mercury in the cup heat radating ribs attached to the cup resist-ance means supported on seid ribs, und an ele ctrical couductor extending through the base of the taube With its inner end connected to thecathode screen and haVing ari external terminal fr counection a point 011 the resistance Ineans.
Landscapes
- Adjustable Resistors (AREA)
- Lasers (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL240536X | 1943-01-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
US2459284A true US2459284A (en) | 1949-01-18 |
Family
ID=19780502
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US685208A Expired - Lifetime US2459284A (en) | 1943-01-30 | 1946-07-20 | Device comprising a current converting tube |
Country Status (5)
Country | Link |
---|---|
US (1) | US2459284A (es) |
BE (1) | BE454150A (es) |
CH (1) | CH240536A (es) |
FR (1) | FR904878A (es) |
GB (1) | GB626331A (es) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1038910A (en) * | 1911-01-30 | 1912-09-17 | Siegmund Strauss | Relay for undulatory currents. |
US1426801A (en) * | 1922-08-22 | Repeater for ttndtjlatory currents | ||
US1790153A (en) * | 1927-10-15 | 1931-01-27 | Gen Electric | Electrical discharge device and method of operation |
US2183918A (en) * | 1934-09-05 | 1939-12-19 | Philips Nv | Rectifier tube and circuit arrangement therefor |
US2217185A (en) * | 1935-12-21 | 1940-10-08 | Raytheon Mfg Co | Gaseous discharge device |
-
0
- BE BE454150D patent/BE454150A/xx unknown
- FR FR904878D patent/FR904878A/fr not_active Expired
-
1944
- 1944-01-28 CH CH240536D patent/CH240536A/de unknown
-
1946
- 1946-07-20 US US685208A patent/US2459284A/en not_active Expired - Lifetime
- 1946-10-16 GB GB30832/46A patent/GB626331A/en not_active Expired
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1426801A (en) * | 1922-08-22 | Repeater for ttndtjlatory currents | ||
US1038910A (en) * | 1911-01-30 | 1912-09-17 | Siegmund Strauss | Relay for undulatory currents. |
US1790153A (en) * | 1927-10-15 | 1931-01-27 | Gen Electric | Electrical discharge device and method of operation |
US2183918A (en) * | 1934-09-05 | 1939-12-19 | Philips Nv | Rectifier tube and circuit arrangement therefor |
US2217185A (en) * | 1935-12-21 | 1940-10-08 | Raytheon Mfg Co | Gaseous discharge device |
Also Published As
Publication number | Publication date |
---|---|
FR904878A (es) | 1945-12-26 |
BE454150A (es) | |
GB626331A (en) | 1949-07-13 |
CH240536A (de) | 1945-12-31 |
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