GB734771A - Improvements in or relating to wave transmission circuits for electron discharge devices - Google Patents
Improvements in or relating to wave transmission circuits for electron discharge devicesInfo
- Publication number
- GB734771A GB734771A GB2102/52A GB210252A GB734771A GB 734771 A GB734771 A GB 734771A GB 2102/52 A GB2102/52 A GB 2102/52A GB 210252 A GB210252 A GB 210252A GB 734771 A GB734771 A GB 734771A
- Authority
- GB
- United Kingdom
- Prior art keywords
- rods
- helix
- glaze
- jig
- per cent
- 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
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
- H01J23/16—Circuit elements, having distributed capacitance and inductance, structurally associated with the tube and interacting with the discharge
- H01J23/24—Slow-wave structures, e.g. delay systems
- H01J23/26—Helical slow-wave structures; Adjustment therefor
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49016—Antenna or wave energy "plumbing" making
Landscapes
- Microwave Tubes (AREA)
Abstract
734,771. Travelling-wave tubes. WESTERN ELECTRIC CO., Inc. Jan. 25, 1952 [Jan. 27, 1951]. No. 2102/52. Class 39 (1). [Also in Groups XXIII and XL (b)] A helical wave transmission circuit for an electron discharge device; preferably a travelling-wave tube, is carried by insulating support rods which are secured to the helix by a layer of glaze. This is stated to reduce noise as compared with known constructions in which the rods merely lie against the helix. The invention is applicable to the travelling-wave tubes disclosed in Specification 669,473 to the hybrid tubes disclosed in Specification 734,828, and in general' to travelling-wave tubes used as amplifiers,. oscillators or modulators. In manufacture the helix 21, Fig. 2, of steel or preferably of molybdenum is wound on a preferably collapsible mandrel 22 of the same material, and is then normalized. The helix support rods 23 are of low-loss ceramic material, preferably zircon, and the insulating glaze may consist of 6.3 per cent Li 2 O, 5.9 per cent CaO, 16.0 per cent BaO, 21.4 per cent Al 2 O 3 , 50.4 per cent Si0 2 , the helix,- rods and glaze having matching expansion coefficients. The rods are coated along a narrow longitudinal strip with a suspension of the glaze in alcohol projected from a spray gun, the remaining circumference of the rods being masked, Fig. 3 (not shown).. A knife blade can be guided along the surface of the mask to slice the glaze to a uniform thickness. The rods 23 are placed in position around the helix by a jig 24, Fig. 2, with the glaze strips contacting the helix. Amyl acetate dabbed on the rods holds them in place in the jig. The end portions of the rods may be glazed for attachment of the input and output coupling devices which fit over the ends of mandrel 22 and have slots to engage the ends of the rods. After welding the ends of helix 21 to antennµ the jig 24 is closed and the assembly is fired in a hydrogen furnace to melt the glaze. After cooling the jig 24 and mandrel 22 are removed. Loss material, for example colloidal graphite, known under the Registered Trade Mark " Aquadag," is then sprayed over the centre of the entire assembly, preferably through an apertured mask. In a modification the helix 21, Fig. 6, may be connected at one end to a collimating grid 134 as described in Specification 734,828. In this case the ends of the rods 23 adjacent grid 34 extend outside the jig 24 and the end of the helix extends beyond mandrel 22 so it can be deformed at 50. In assembly, grid structure 34 is welded together and fired in a hydrogen furnace to remove oxides and is then fitted on rods 23 by means of slots 39 so that the rods protrude slightly. The helix is welded to grid 34 and to a coupling device at the other end, and the rods are then glazed to all the above members as previously set out. After cooling, the protruding ends of the rods are filed off so that the assembly can fit inside ceramic cup 40. In an alternative construction the helix may be of tantalum, which also acts as a getter and so tends to prevent plasma ion oscillations, in which case the rods are of steatite. The tantalum helix must be vacuum fired since firing in a hydrogen furnace makes it brittle. Specifications 557,811, [Group V], and 669,475 also are referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US208204A US2790926A (en) | 1951-01-27 | 1951-01-27 | Traveling wave tube |
Publications (1)
Publication Number | Publication Date |
---|---|
GB734771A true GB734771A (en) | 1955-08-10 |
Family
ID=22773649
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2102/52A Expired GB734771A (en) | 1951-01-27 | 1952-01-25 | Improvements in or relating to wave transmission circuits for electron discharge devices |
Country Status (6)
Country | Link |
---|---|
US (1) | US2790926A (en) |
BE (1) | BE508653A (en) |
DE (1) | DE913084C (en) |
FR (1) | FR1047946A (en) |
GB (1) | GB734771A (en) |
NL (2) | NL79078C (en) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3188720A (en) * | 1965-06-15 | Method of sealing and joining and articles made thereby | ||
US2884556A (en) * | 1955-03-07 | 1959-04-28 | Hughes Aircraft Co | Traveling wave electron discharge device |
US2869015A (en) * | 1955-07-01 | 1959-01-13 | American Telephone & Telegraph | Method of fabricating a grid electrode |
US2954534A (en) * | 1955-09-10 | 1960-09-27 | Int Standard Electric Corp | Arrangement for securing in position one or more helices in traveling wave tubes |
US2943227A (en) * | 1956-07-06 | 1960-06-28 | Itt | Electron gun support |
US2943382A (en) * | 1956-10-23 | 1960-07-05 | Sylvania Electric Prod | Method for producing travelling wave tubes |
US2918358A (en) * | 1956-12-31 | 1959-12-22 | Hughes Aircraft Co | Method of manufacture of slow-wave structures |
US2869217A (en) * | 1957-02-14 | 1959-01-20 | Sylvania Electric Prod | Method for assembling travelling wave tubes |
US2947907A (en) * | 1958-12-31 | 1960-08-02 | Bell Telephone Labor Inc | Traveling wave tube |
DE1296712B (en) * | 1961-05-18 | 1969-06-04 | Western Electric Co | Method for the fixed mounting of the helical windings of a traveling field helical tube |
US3242375A (en) * | 1961-06-19 | 1966-03-22 | Litton Prec Products Inc | Helix support |
BE627771A (en) * | 1962-02-05 | |||
US3399326A (en) * | 1964-09-10 | 1968-08-27 | Philips Corp | Travelling wave tube having a graphite coating in the central region and the free end at least 10 wavelengths long and a qc of at least 0.4 |
US3548345A (en) * | 1966-09-15 | 1970-12-15 | Hughes Aircraft Co | Brazed dielectric-to-metal joints for slow-wave structure assemblies |
US3475643A (en) * | 1967-01-16 | 1969-10-28 | Varian Associates | Ceramic supported slow wave circuits with the ceramic support bonded to both the circuit and surrounding envelope |
US5596797A (en) * | 1995-04-03 | 1997-01-28 | D & M Plastics Corporation | Method and apparatus for making a molded cellular antenna coil |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1307510A (en) * | 1919-06-24 | Thermionic translating device | ||
US1892819A (en) * | 1929-04-27 | 1933-01-03 | Philips Nv | Method of soldering together metal parts |
US2174853A (en) * | 1937-08-26 | 1939-10-03 | Hygrade Sylvania Corp | Electron gun structure and method of assembly thereof |
US2277150A (en) * | 1938-04-14 | 1942-03-24 | Lorenz C Ag | Method of manufacturing vacuum tube devices |
US2507709A (en) * | 1946-09-26 | 1950-05-16 | Bell Telephone Labor Inc | Grid electrode and method of manufacture |
NL73832C (en) * | 1946-10-22 | |||
NL135247C (en) * | 1946-10-22 | |||
US2541843A (en) * | 1947-07-18 | 1951-02-13 | Philco Corp | Electronic tube of the traveling wave type |
US2549551A (en) * | 1948-01-15 | 1951-04-17 | Bell Telephone Labor Inc | Grid electrode structure and manufacturing method therefor |
FR962369A (en) * | 1948-02-10 | 1950-06-09 | ||
US2567415A (en) * | 1948-09-30 | 1951-09-11 | Bell Telephone Labor Inc | Grid assembly and method of fabrication |
-
0
- NL NL7705651.A patent/NL166098B/en unknown
- BE BE508653D patent/BE508653A/xx unknown
- NL NL79078D patent/NL79078C/xx active
-
1951
- 1951-01-27 US US208204A patent/US2790926A/en not_active Expired - Lifetime
- 1951-08-03 FR FR1047946D patent/FR1047946A/en not_active Expired
-
1952
- 1952-01-09 DE DEW7611A patent/DE913084C/en not_active Expired
- 1952-01-25 GB GB2102/52A patent/GB734771A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US2790926A (en) | 1957-04-30 |
NL79078C (en) | |
BE508653A (en) | |
NL166098B (en) | |
FR1047946A (en) | 1953-12-17 |
DE913084C (en) | 1954-06-08 |
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