US2459284A - Device comprising a current converting tube - Google Patents

Device comprising a current converting tube Download PDF

Info

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
Application number
US685208A
Other languages
English (en)
Inventor
Mulder Johannes Gijsbe Wilhelm
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hartford National Bank and Trust Co
Original Assignee
Hartford National Bank and Trust Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hartford National Bank and Trust Co filed Critical Hartford National Bank and Trust Co
Application granted granted Critical
Publication of US2459284A publication Critical patent/US2459284A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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)
US685208A 1943-01-30 1946-07-20 Device comprising a current converting tube Expired - Lifetime US2459284A (en)

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 (xx)
BE (1) BE454150A (xx)
CH (1) CH240536A (xx)
FR (1) FR904878A (xx)
GB (1) GB626331A (xx)

Citations (5)

* Cited by examiner, † Cited by third party
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

Patent Citations (5)

* Cited by examiner, † Cited by third party
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
BE454150A (xx)
CH240536A (de) 1945-12-31
FR904878A (xx) 1945-12-26
GB626331A (en) 1949-07-13

Similar Documents

Publication Publication Date Title
US1807140A (en) Discharge tube
US2518879A (en) Hydrogen thyratron
US2797348A (en) Grid system for gaseous discharge device
US1874753A (en) Controlled arc discharge apparatus
US2459284A (en) Device comprising a current converting tube
US1961749A (en) Gaseous electric discharge device
US2435246A (en) Gaseous discharge device containing perforated starting electrodes
US1992493A (en) Discharge device
USRE15278E (en) Electron-discharge apparatus
US1965127A (en) Electrical discharge lamp
US2072733A (en) Electrical discharge device
US2381632A (en) Electron discharge device
US2217185A (en) Gaseous discharge device
US1880092A (en) Electron discharge device
US1929369A (en) Electrical discharge device
US2592556A (en) Gaseous-discharge device
US2396807A (en) Discharge device and cathode therefor
US2030715A (en) Gaseous electric discharge lamp device
US2191595A (en) Magnetically controlled gaseous discharge device
US1913427A (en) Electric discharge device
US1953906A (en) Rectifier tube
US1211091A (en) Cathode-ray device.
US2117794A (en) Ionic discharge tube
US2297721A (en) Electrical gaseous discharge control device
US3258629A (en) Cold cathode display device with fluorescent indicia anodes