US2229957A - Electrode mounting arrangement - Google Patents

Electrode mounting arrangement Download PDF

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Publication number
US2229957A
US2229957A US357424A US35742440A US2229957A US 2229957 A US2229957 A US 2229957A US 357424 A US357424 A US 357424A US 35742440 A US35742440 A US 35742440A US 2229957 A US2229957 A US 2229957A
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US
United States
Prior art keywords
cathode
sleeve
filaments
anode
envelope
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
US357424A
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English (en)
Inventor
Thomas G Crawford
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.)
General Electric Co
Original Assignee
General Electric 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 General Electric Co filed Critical General Electric Co
Priority to US357424A priority Critical patent/US2229957A/en
Application granted granted Critical
Publication of US2229957A publication Critical patent/US2229957A/en
Priority to FR877993D priority patent/FR877993A/fr
Priority to BE450910D priority patent/BE450910A/xx
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
    • H01J1/02—Main electrodes
    • H01J1/13—Solid thermionic cathodes
    • H01J1/15—Cathodes heated directly by an electric current
    • H01J1/18—Supports; Vibration-damping arrangements

Definitions

  • the present invention relates to an improved tate its assembly with a water jacket or other electrode mounting arrangement for electric dismeans for cooling the exterior anode surface.
  • charge devices While not limited thereto, the Within the anode and arranged coaxially thereinvention is especially applicable in connection with there is provided a separately heated cath- 5 with high frequency power tubes.
  • ode comprising a plurality of filaments I3 which 5 Tubes of the character referred to generally are arranged in hollow configuration.
  • a cathode which is made up of a pluaments are in turn surrounded by a grid strucrality of separate elongated filaments positioned ture which is shown as comprising grid wires I5 in closely spaced relationship to other parts of wound helically on a plurality of stay rods I6 l0 the tube structure, such as the grid.
  • the grid is preferably arranged ing may occur as a consequence of uncompenvery close to the cathode structure so that the sated expansion of the cathode laments.
  • This spacing between the grid Wires and the cathode danger has been found to be especially great in filaments may be on the order of 0.180 inch.
  • the open end of the anode is hermetlcally 15 ing current is supplied to the various filaments joined to a glass envelope I1 which serves to seal from a polyphase source which is subject to unthe discharge space between the anode and balanced operation. Under these circumstances, cathode.
  • the envelope is provided with an inthe individual laments may be heated to diiersulating base I9 which is held in place by means o ent degrees so that the resultant unequal expanof a flanged metal member 20 cemented to the 20 sion of the filaments tends to cause distortion of envelope.
  • 'I'he base i9 'serves to support a sethe cathode structure and breakage of its parts.
  • the invention itself, together with furconnected directly to extensions of the grid stay ther objects and advantages thereof, may best be rods I6 and is in clamped engagement with an understood by reference to the following descripannular disk member 30 to which a lead-in contion taken in connection with the drawing in ductor 3l for the grid is secured.
  • is provided with an externally accessible grid 40 an evacuated discharge device suitably embodyterminal 32.
  • Fig. 2 is an enlarged detail is provided a reentrant circular press 35.
  • This view of the cathode arrangement shown on a serves as a mount for a plurality of fixed termismaller scale in Fig.
  • Fig. 3 is a section taken nals 31 which are connected outside the envelope on line 3-3 of Fig. 2; and Fig. 4 is a sectional with the current supply conductors 23.
  • the var- 45 view of one of the mounting element of Fig. 2, icus terminals 31 are supported in rigid assembly showing the same as it appears when the assoby means of an apertured metal disk 40 which ciated cathode filament is in fully expanded conembraces the various terminals but which is indition. sulated therefrom by a plurality of insulating Referring particularly to Fig. l there is shown sleeves 4I, suitably consisting of quartz.
  • This 50 a discharge device comprising an elongated cylindisk also engages and serves as a partial support drical anode I0 which consists, for example, of for a xed rod 42 which forms the central stem of copper and which constitutes a portion of the the cathode structure and from which all the enclosure of the device.
  • the anode is provided cathode filaments are supported at the end of with an outwardly extending flange Il to facilithe envelope which is remote from the stem 55 press 35.
  • the supporting connection between the filaments and the rod 42 is made through a metal disk 43 which peripheraily engages the various maments.
  • the filaments are held in contact with the disk 43 by being welded together at their extremities as indicated at 44.
  • the point 44 represents the neutral point of the cathode so that no current connection for the rod 42 is required.
  • each of the fixed terminals 31 is fitted with a metallic sleeve 46 which extends from the terminal toward the other extremity of the envelope.
  • Each of the sleeves has in the end which is remote from its associated terminal an apertured disk 46' with an o ⁇ ing of sufficient size to receive loosely a mem er 4T constituting an extension of one of the cathode filaments.
  • the members 41 are held in appropriately spaced relationship by means of insulating eyelets 48 which abut the extremities of the various sleeves and which engage the members with suiiicient clearance to permit their axial motion.
  • the -eye1ets 48 are mounted on an apertured disk 49 which is secured centrally to the cathode rod 42.
  • each of the filament extensions 41 terminates in a disk 50 which slidably engages the inner surface of the sleeve so as to be capable of longitudinal movement therein and which furnishes a guide for the member to which it is secured.
  • a compression spring 5l arranged Within the sleeve 46 bears on the under surface of the disk 50 and thus serves to maintain the connected filament under tension.
  • a flexible connection between the guiding disk and the fixed terminal 3l is provided by means of a number of helically formed braided conductors 53 which may suitably be constituted of copper. 'I'hese conductors are capable of considerable Vextensive and compressive movement so that an appreciable expansion of the cathode filaments may occur without danger of breaking the current supply path.
  • each of the filament tensioning means is enclosed within a separate metallic sleeve, has the advantage that the various springs and exible conductors are well protected from heat generated within the discharge space and also from the occurrence oi' excessive heating during the exhaust procedures to which devices of the character under consideration are ordinarily subjected. Moreover, this arrangement provides a compact construction and one which may be relied upon to have a long operating life even under veryadverse conditions of operation.
  • An electric discharge device comprising an anode, a cathode consisting of a plurality of elongated iilaments, an envelope hermetically sealing the discharge space between the anode and cathode, a plurality of lead-in wires extending within the envelope and having fixed terminals therein, and a plurality of mountings for separately tensioning the various cathode iilaments, each said mounting including an elongated sleeve, means comprising an extension of one of the said filaments projecting into the sleeve so as to be longitudinaliy movable therein, a.
  • Anelectric discharge device comprising an (anode, a cathode consisting of a plurality of elongated filaments, an envelope hermetically sealing the discharge space between the anode and cathode, a plurality o! lead-in wires extending within the envelope and having iixed terminels therein, and a plurality of mountings for separately tensioning 'the various cathode zla niente, each said mounting including an elongated-sleeve connected with and forming an ex" tension of one of the said lead-in terminals, P com; an extension of one said fila .ents projectimg into said sleeve at the end ther-eci which is remote from the said lead-in tern mined, Within the said sleeve and 'tendto move the said filament extension toward the said terminal se as to maintain the lament under tension, and a conductor within. the sleeve providing e. flexible connection between the filament extension and the said lead-in
  • An electric discharge device comprising an anode, a cathode consisting of a plurality of elongated iilaments, an envelope hermetically sealing the discharge space between the anode and cathode, a plurality of lead-in wires extending Within the envelope and having terminals therein, and a plurality of mountings for separately tensioning the various cathode iilaments, each said mounting including an elongated sleeve connecting at one end with one of the said terminals, means comprising an extension of one of the said laments projecting into the sleeve atthe end thereof which is remote from the said terminal, means slidablyengaging the interior of the said sleeve for guiding the motion of the said iilament extension thereimaspringwithinthesie'eveiorurdngthe said filament extension towardthe saidterminal soastomaintainthenlunentundertensiomand a readily deformable conductor extending longitudinmlly of the
  • An electric discharge device comprising an anode. a cathode consisting of a plurality of elongated maments, an envelope hermetically seeling the discharge space between the anode and necungatoneendwlthoneoftnsaxdrmmms, means comprising an extension of one 'of the said maments projecting into the sleeve at the end thereof which is remote from the said ter- ⁇ minai.

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US357424A 1940-09-19 1940-09-19 Electrode mounting arrangement Expired - Lifetime US2229957A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US357424A US2229957A (en) 1940-09-19 1940-09-19 Electrode mounting arrangement
FR877993D FR877993A (fr) 1940-09-19 1941-12-23 Perfectionnements au montage des électrodes dans les tubes à décharge et analogues
BE450910D BE450910A (enrdf_load_stackoverflow) 1940-09-19 1943-06-02

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US357424A US2229957A (en) 1940-09-19 1940-09-19 Electrode mounting arrangement

Publications (1)

Publication Number Publication Date
US2229957A true US2229957A (en) 1941-01-28

Family

ID=23405530

Family Applications (1)

Application Number Title Priority Date Filing Date
US357424A Expired - Lifetime US2229957A (en) 1940-09-19 1940-09-19 Electrode mounting arrangement

Country Status (3)

Country Link
US (1) US2229957A (enrdf_load_stackoverflow)
BE (1) BE450910A (enrdf_load_stackoverflow)
FR (1) FR877993A (enrdf_load_stackoverflow)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2419124A (en) * 1943-11-10 1947-04-15 Westinghouse Electric Corp Insulating means for metallic spacers in electron discharge devices
US2434529A (en) * 1944-06-01 1948-01-13 Westinghouse Electric Corp Filament tensioning means in electron discharge device
US2527799A (en) * 1949-04-02 1950-10-31 Machlett Lab Inc Filament structure
US2544664A (en) * 1949-03-17 1951-03-13 Rca Corp High-frequency high-power tube
US2545759A (en) * 1947-11-24 1951-03-20 Jr Abraham Binneweg Supported electrode metal radio tube
US2546184A (en) * 1949-05-26 1951-03-27 Rca Corp Nondeforming electrode structure and electron discharge device
US2602907A (en) * 1949-01-14 1952-07-08 Bell Telephone Labor Inc Filament mounting for high power electron discharge devices

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2419124A (en) * 1943-11-10 1947-04-15 Westinghouse Electric Corp Insulating means for metallic spacers in electron discharge devices
US2434529A (en) * 1944-06-01 1948-01-13 Westinghouse Electric Corp Filament tensioning means in electron discharge device
US2545759A (en) * 1947-11-24 1951-03-20 Jr Abraham Binneweg Supported electrode metal radio tube
US2602907A (en) * 1949-01-14 1952-07-08 Bell Telephone Labor Inc Filament mounting for high power electron discharge devices
US2544664A (en) * 1949-03-17 1951-03-13 Rca Corp High-frequency high-power tube
US2527799A (en) * 1949-04-02 1950-10-31 Machlett Lab Inc Filament structure
US2546184A (en) * 1949-05-26 1951-03-27 Rca Corp Nondeforming electrode structure and electron discharge device

Also Published As

Publication number Publication date
FR877993A (fr) 1943-01-07
BE450910A (enrdf_load_stackoverflow) 1943-07-31

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