US2451557A - Electron tube for high frequency - Google Patents
Electron tube for high frequency Download PDFInfo
- Publication number
- US2451557A US2451557A US579668A US57966845A US2451557A US 2451557 A US2451557 A US 2451557A US 579668 A US579668 A US 579668A US 57966845 A US57966845 A US 57966845A US 2451557 A US2451557 A US 2451557A
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- Prior art keywords
- stem
- envelope
- metallic
- tubular
- sealed
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- Expired - Lifetime
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- 239000011324 bead Substances 0.000 description 5
- 238000005219 brazing Methods 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 240000007839 Kleinhovia hospita Species 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J21/00—Vacuum tubes
- H01J21/02—Tubes with a single discharge path
- H01J21/06—Tubes with a single discharge path having electrostatic control means only
- H01J21/065—Devices for short wave tubes
Definitions
- My invention relates to a tube having an external anode particularly adapted for high fre- It is among the broad objects of my invention to provide an improved envelope and terminal structure, and improved means for conductively supporting the electrodes within the envelope.
- Another object is to provide an improved concentric stem structure for -a cathode.
- Another object is to provide a better mounting and terminal structure for a grid.
- a further object is to provide an improved cooler for the anode.
- v Figure 1 is an axial sectional view of a tube embodying the improvements of my invention, this view being about three times actual size, taken in a plane indicated by line I-I of Figure 2.
- Figure 2 is an end view looking at the grid terminal
- Figure 3 is a fragmentary-sectional view showing a modied grid support.
- my tube comprises an envelope having an intermediate metallic anode section and vitreous end sections.
- a cathode stem with inner and outer stem members is arranged at one end of the envelope for supporting the cathode, and a grid terminal member is arranged at the opposite end for supporting the grid.
- An improved sealing means is provided between the cathode stem members, and an improved structure is provided for mounting the grid on its terminal member. Improvements are also incorporated in .the cooler for the anode.
- my tube comprises an envelope having a tubular metallic anode section 2 with ared ends 3 sealed to envelope sections 4 and 6 of vitreous material such as glass.
- Section 4 carries an exhaust tubulation which is sealed oil at tip 1 after the envelope is evacuated.
- a cathode stem is arranged at one end of the envelope comprising an outer tubular metallic stem member 8 and a solid inner metallic stem y member 9. These stem members are concentric and both are coaxial with anode 2, the outer member 8 being sealed to vitreous section l of the envelope. With a concentric stem arrangerclosure means comprising a metallic sleeve II interposed between the stem members, the lower -inturned end of the sleeve being sealed to the inner stem rod 9 by la vitreous bead I2 and the upper end being secured to the outer stem tube 8 as by brazing I3 at the rims.
- the stem is preferably assembled by rst securing sleeve II to rod 9 at sealing bead I2, which permits inspection and checking this joint for leaks before placement of these parts in stem tube 8. These parts are then inserted in tubular member 8 and the final joint is made by brazing at I3. Since the braze is at the end of the outer tubular member this joint is also located for easy inspection.
- the cathode is preferably of the indirectly heated type comprising a cup-shaped cylindrical body I4 having a suitable emissive surface such as an oxide coating on the cylindrical wall. These oxide coatings are well known, and any of the usual compositions may be used.
- the lower end of metal body I4-- is preferably closed by apertured plate I6, and the body unit is supported on outer stem member 8 by bracket rods I1.
- the heater for the cathode comprises a resistance coil I8 having its lower end secured to inner stem member 9 and its upper end secured to body Il by ear I9. This entire cathode and stem structure is inserted into the envelope and sealed in place as a unit.
- the grid is of generally tubular or cylindrical construction interposed between the cathode and anode, and preferably comprises longitudinal metal bars 2
- This cup is secured to a metallic terminal member 24 by a screw 2G.
- This three-4 piece cooler structure enables it to be assembled about the intermediate anode even though the anode is smaller in diameter than the end portions of the tube.
- the cooler pieces are preferably secured together and to the anode, as by d soldering, to form an integral unit. Ii desired, iins may be provided on ring dior increased radiation.
- Figure 3 shows a modified structure adapted for more strenuous operation by providing a more l@ direct and better thermal path for conducting 'heat away from the grid.
- This modiication also constitutes a simpler and more rigid support for the grid. It comprises an internally extending supporting flange 32 formed integrally with ter 1g minal member 2d.
- This one-piece stem structure is preferably of a metal having good thermal conductivity such as copper.
- the inner end of ange y 32 has an annular groove formed between the :dange and a lip 33.
- Grid Wires 2i are engaged in 2@ this groove Vand are preferably held by deiorming lip 33 inwardly under pressure to solidly grip to ⁇ Wires so that the latter are literally embedded in the copper. l.
- Such a joint is easy to make, has good mechanical strength, and provides an excellent thermal path for heat conduction.
- the ends of the grid wires may be otherwise secured as by brazing into the retaining groove, vbut the coming the joint is to form lip 33 as an annular outwardly extending iiange and then forcing it downwardly and inwardly. against the grid wires by a suitable die. in this structure the lower lends of faces of a channel-shaped ring I claim:
- An electron tube comprising an envelope having a tubular metallic anode section anda vitreous section sealed to an end of the anode c section, a tubular metallic stem member sealed. to "said vitreous section, an inner metallicstem member concentric with said tubular member, vacuum-tight closure means interposed between the stem members, and a cathode within the envelopeA connected to said stem members.
- An electron tube comprising an envelope having a tubular metallic anode section and al vitreous section sealed to an end of the anode'. section, a tubular metallic stem member sealed to said vitreous section, an inner metallic stem member concentric with said tubular member,. vacuum-tight closure means interposed between the stem members, a cathode cylinder within the envelope, and a heater within the cylinder connected to said stem members.
- An electron tube comprising an envelope ⁇ having a tubular metallic anode section and a vitreous section sealed to an end of" the anode section, a tubular metallic stem member sealed to G0 said vitreous section, an inner metallic stem mem" ber concentric with said tubular member, vacuum-tight closure means interposed between thestem members, a cathode cylinder within the envelope supported on said tubular stem member and a heater within the cylinder connected'at one end to the inner stem member and at the. other end to said cylinder.
- An electron tube comprising an envelope, a tubular metallic stem member secured to the envelope, an inner metallic stem member concentric with said tubular member, a metallic sleeve interposed between and secured to one of said y e@ members, a vitreous bead sealed to the other end of the sleeve and to said other member, and an electrode in the envelope connected to said stem members.
- An electron tube comprising an envelope, a tubular metallic stem member secured to the envelope, an inner metallic 'stem member concentric with said tubular member, a metallic sleeve interposed between. the stem members and secured at one end to the tubular member, a Vitreous bead sealed'to the other end oi? the sleeve and to said inner member, and an electrode in the envelope connected to said stem members.
- Anelectron tube comprising an envelope having a tubular metallic anode section and a vitreous section sealed to an end of the anode section, a tubular metallic stem member sealed to said vitreous section, an inner metallic stem Ymember concentric with said tubular member,
- a metallic sleeve interposed between and secured to 'one of said members, a vitreous bead sealed to the other end of the sleeve and to said other member, and any electrode in the envelope connected to said stem members.
- An electron tube comprising an envelope having a tubular metallic anode section and a vitreous section sealed to each end of the anode section, atubular metallic stem member sealed to one of said vitreous sections, an inner metallic pression joint is preferred.
- l metallic terminal member sealed to the other the grid wires are preferably clamped between the 35' vitreous envelope section, and a grid in the envelope connected to said terminal member.
- An electron tube comprising an envelope having a tubular metallic anode section and a vit ,reous section sealed to each end of the anode section, a tubular metallic stem member sealed to one of said vitreous sections, an inner metallic stem ⁇ member concentric with said tubular member, vacuum-tight closure means interposed between the stem members, a cathode within the envelope connected to and supported wholly by said stem members, a metallic terminal member sealed to the other vitreous envelope section, and a grid in the envelope connected to and supported wholly by said'terminal member.
- An electron tube comprising an envelope, a tubular metallic stem member secured to the envelope, an inner metallic stem member concentric with said tubular member, vacuum-tight closure means interposed between said members, saidA closure means including a metallic sleeve projecting into the tubular stem member and secured-at one end to said tubular stem member, and an electrode in the envelope connected to said stem members.
Description
2 sheets-sheet 1 G. T. HOWES ELECTRON TUBE FOR HIGH-FREQUENCY Oct. 19, 1948.
Filed Feb. 24, 1945 n quency operation.
Patented O'ct. 19, 1948 ELECTRON TUBE FOR HIGH FREQUENCY Gordon T. Howes, Belmont, Calif., assignor to Eitel-McCullough, Inc., San Bruno, Calif., a corporation of California i Application February 24, 1945, Serial No. 579,668
` (Cl. Z50-2.7.5)
9 Claims. 1
My invention relates to a tube having an external anode particularly adapted for high fre- It is among the broad objects of my invention to provide an improved envelope and terminal structure, and improved means for conductively supporting the electrodes within the envelope.
Another object is to provide an improved concentric stem structure for -a cathode.
Another object is to provide a better mounting and terminal structure for a grid.
A further object is to provide an improved cooler for the anode.
The invention possesses other objects and features of advantage, some of which, with the foregoing, will be set forth in the following description of my invention, It is to be understood that I do not limit myself to this; disclosure of species of my invention as I may adopt variant embodiments thereof within the scope of the claims.
Referring to the drawings:
vFigure 1 is an axial sectional view of a tube embodying the improvements of my invention, this view being about three times actual size, taken in a plane indicated by line I-I of Figure 2.
Figure 2 is an end view looking at the grid terminal; and
Figure 3 is a fragmentary-sectional view showing a modied grid support.
In terms of broad inclusion, my tube comprises an envelope having an intermediate metallic anode section and vitreous end sections. A cathode stem with inner and outer stem members is arranged at one end of the envelope for supporting the cathode, and a grid terminal member is arranged at the opposite end for supporting the grid. An improved sealing means is provided between the cathode stem members, and an improved structure is provided for mounting the grid on its terminal member. Improvements are also incorporated in .the cooler for the anode.
In greater detail, and referring to Figures 1 and 2, my tube comprises an envelope having a tubular metallic anode section 2 with ared ends 3 sealed to envelope sections 4 and 6 of vitreous material such as glass. Section 4 carries an exhaust tubulation which is sealed oil at tip 1 after the envelope is evacuated.
A cathode stem is arranged at one end of the envelope comprising an outer tubular metallic stem member 8 and a solid inner metallic stem y member 9. These stem members are concentric and both are coaxial with anode 2, the outer member 8 being sealed to vitreous section l of the envelope. With a concentric stem arrangerclosure means comprising a metallic sleeve II interposed between the stem members, the lower -inturned end of the sleeve being sealed to the inner stem rod 9 by la vitreous bead I2 and the upper end being secured to the outer stem tube 8 as by brazing I3 at the rims.
The stem is preferably assembled by rst securing sleeve II to rod 9 at sealing bead I2, which permits inspection and checking this joint for leaks before placement of these parts in stem tube 8. These parts are then inserted in tubular member 8 and the final joint is made by brazing at I3. Since the braze is at the end of the outer tubular member this joint is also located for easy inspection.
The cathode is preferably of the indirectly heated type comprising a cup-shaped cylindrical body I4 having a suitable emissive surface such as an oxide coating on the cylindrical wall. These oxide coatings are well known, and any of the usual compositions may be used. The lower end of metal body I4--is preferably closed by apertured plate I6, and the body unit is supported on outer stem member 8 by bracket rods I1. The heater for the cathode comprises a resistance coil I8 having its lower end secured to inner stem member 9 and its upper end secured to body Il by ear I9. This entire cathode and stem structure is inserted into the envelope and sealed in place as a unit.
The grid is of generally tubular or cylindrical construction interposed between the cathode and anode, and preferably comprises longitudinal metal bars 2| secured at one end as by welding or brazing to ring 22 and at the other end to the metal supporting cup 23. This cup is secured to a metallic terminal member 24 by a screw 2G. A
' iiange 21 on terminal 24'is sealed to a reentrant This three-4 piece cooler structure enables it to be assembled about the intermediate anode even though the anode is smaller in diameter than the end portions of the tube. The cooler pieces are preferably secured together and to the anode, as by d soldering, to form an integral unit. Ii desired, iins may be provided on ring dior increased radiation.
Figure 3 shows a modified structure adapted for more strenuous operation by providing a more l@ direct and better thermal path for conducting 'heat away from the grid. This modiication also constitutes a simpler and more rigid support for the grid. It comprises an internally extending supporting flange 32 formed integrally with ter 1g minal member 2d. This one-piece stem structure is preferably of a metal having good thermal conductivity such as copper. The inner end of ange y 32 has an annular groove formed between the :dange and a lip 33. Grid Wires 2i are engaged in 2@ this groove Vand are preferably held by deiorming lip 33 inwardly under pressure to solidly grip to `Wires so that the latter are literally embedded in the copper. l. Such a joint is easy to make, has good mechanical strength, and provides an excellent thermal path for heat conduction. Ii desired, the ends of the grid wires may be otherwise secured as by brazing into the retaining groove, vbut the coming the joint is to form lip 33 as an annular outwardly extending iiange and then forcing it downwardly and inwardly. against the grid wires by a suitable die. in this structure the lower lends of faces of a channel-shaped ring I claim: A
l. An electron tube comprising an envelope having a tubular metallic anode section anda vitreous section sealed to an end of the anode c section, a tubular metallic stem member sealed. to "said vitreous section, an inner metallicstem member concentric with said tubular member, vacuum-tight closure means interposed between the stem members, and a cathode within the envelopeA connected to said stem members.
' 2. An electron tube comprising an envelope having a tubular metallic anode section and al vitreous section sealed to an end of the anode'. section, a tubular metallic stem member sealed to said vitreous section, an inner metallic stem member concentric with said tubular member,. vacuum-tight closure means interposed between the stem members, a cathode cylinder within the envelope, and a heater within the cylinder connected to said stem members.
. 3. An electron tube comprising an envelope` having a tubular metallic anode section and a vitreous section sealed to an end of" the anode section, a tubular metallic stem member sealed to G0 said vitreous section, an inner metallic stem mem" ber concentric with said tubular member, vacuum-tight closure means interposed between thestem members, a cathode cylinder within the envelope supported on said tubular stem member and a heater within the cylinder connected'at one end to the inner stem member and at the. other end to said cylinder.
4. An electron tube comprising an envelope, a tubular metallic stem member secured to the envelope, an inner metallic stem member concentric with said tubular member, a metallic sleeve interposed between and secured to one of said y e@ members, a vitreous bead sealed to the other end of the sleeve and to said other member, and an electrode in the envelope connected to said stem members.
5. An electron tube comprising an envelope, a tubular metallic stem member secured to the envelope, an inner metallic 'stem member concentric with said tubular member, a metallic sleeve interposed between. the stem members and secured at one end to the tubular member, a Vitreous bead sealed'to the other end oi? the sleeve and to said inner member, and an electrode in the envelope connected to said stem members.
6. Anelectron tube comprising an envelope having a tubular metallic anode section and a vitreous section sealed to an end of the anode section, a tubular metallic stem member sealed to said vitreous section, an inner metallic stem Ymember concentric with said tubular member,
a metallic sleeve interposed between and secured to 'one of said members, a vitreous bead sealed to the other end of the sleeve and to said other member, and any electrode in the envelope connected to said stem members.
l metallic terminal member sealed to the other the grid wires are preferably clamped between the 35' vitreous envelope section, and a grid in the envelope connected to said terminal member.
8. An electron tube comprising an envelope having a tubular metallic anode section and a vit ,reous section sealed to each end of the anode section, a tubular metallic stem member sealed to one of said vitreous sections, an inner metallic stem` member concentric with said tubular member, vacuum-tight closure means interposed between the stem members, a cathode within the envelope connected to and supported wholly by said stem members, a metallic terminal member sealed to the other vitreous envelope section, and a grid in the envelope connected to and supported wholly by said'terminal member.
9. An electron tube comprising an envelope, a tubular metallic stem member secured to the envelope, an inner metallic stem member concentric with said tubular member, vacuum-tight closure means interposed between said members, saidA closure means including a metallic sleeve projecting into the tubular stem member and secured-at one end to said tubular stem member, and an electrode in the envelope connected to said stem members.
GORDON lT. HOWES.
REFERENCES CIVITED '1 The following lreferences are of 'record in the le of this patent:
UNITED STATES PATENTS Number Name Date 1,814,376 Gebhard et al. July 14, 1931 2,011,647 Mouromtsel et al. Aug. 20, 1935 2,128,232 Dallenbach Aug. 30, 1938 2,163,589 y Dallenbach et al. June 27, 1939 2,368,031 Llewellyn Jan. 23, 1945
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US579668A US2451557A (en) | 1945-02-24 | 1945-02-24 | Electron tube for high frequency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US579668A US2451557A (en) | 1945-02-24 | 1945-02-24 | Electron tube for high frequency |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2451557A true US2451557A (en) | 1948-10-19 |
Family
ID=24317849
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US579668A Expired - Lifetime US2451557A (en) | 1945-02-24 | 1945-02-24 | Electron tube for high frequency |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US2451557A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2524001A (en) * | 1948-05-19 | 1950-09-26 | Raytheon Mfg Co | Compressed cathode support structure |
| US2740927A (en) * | 1952-12-31 | 1956-04-03 | Jennings Radio Mfg Corp | Vacuum variable condenser |
| US2941109A (en) * | 1957-10-25 | 1960-06-14 | Eitel Mccullough Inc | Tube having planar electrodes |
| US3000200A (en) * | 1958-06-03 | 1961-09-19 | Gen Electric | Flash lamp |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1814376A (en) * | 1927-05-03 | 1931-07-14 | Fed Telegraph Co | Electron tube apparatus |
| US2011647A (en) * | 1932-07-30 | 1935-08-20 | Westinghouse Electric & Mfg Co | Tube cooling device |
| US2128232A (en) * | 1934-02-23 | 1938-08-30 | Meaf Mach En Apparaten Fab Nv | Electron tube |
| US2163589A (en) * | 1935-06-20 | 1939-06-27 | Pintsch Julius Kg | Electron tube |
| US2368031A (en) * | 1940-03-15 | 1945-01-23 | Bell Telephone Labor Inc | Electron discharge device |
-
1945
- 1945-02-24 US US579668A patent/US2451557A/en not_active Expired - Lifetime
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1814376A (en) * | 1927-05-03 | 1931-07-14 | Fed Telegraph Co | Electron tube apparatus |
| US2011647A (en) * | 1932-07-30 | 1935-08-20 | Westinghouse Electric & Mfg Co | Tube cooling device |
| US2128232A (en) * | 1934-02-23 | 1938-08-30 | Meaf Mach En Apparaten Fab Nv | Electron tube |
| US2163589A (en) * | 1935-06-20 | 1939-06-27 | Pintsch Julius Kg | Electron tube |
| US2368031A (en) * | 1940-03-15 | 1945-01-23 | Bell Telephone Labor Inc | Electron discharge device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2524001A (en) * | 1948-05-19 | 1950-09-26 | Raytheon Mfg Co | Compressed cathode support structure |
| US2740927A (en) * | 1952-12-31 | 1956-04-03 | Jennings Radio Mfg Corp | Vacuum variable condenser |
| US2941109A (en) * | 1957-10-25 | 1960-06-14 | Eitel Mccullough Inc | Tube having planar electrodes |
| US3000200A (en) * | 1958-06-03 | 1961-09-19 | Gen Electric | Flash lamp |
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