GB763545A - Improvements in or relating to travelling wave tubes and the manufacture thereof - Google Patents
Improvements in or relating to travelling wave tubes and the manufacture thereofInfo
- Publication number
- GB763545A GB763545A GB30211/54A GB3021154A GB763545A GB 763545 A GB763545 A GB 763545A GB 30211/54 A GB30211/54 A GB 30211/54A GB 3021154 A GB3021154 A GB 3021154A GB 763545 A GB763545 A GB 763545A
- Authority
- GB
- United Kingdom
- Prior art keywords
- envelope
- helix
- cylinder
- contact
- oct
- 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
- H01J25/00—Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
- H01J25/34—Travelling-wave tubes; Tubes in which a travelling wave is simulated at spaced gaps
- H01J25/36—Tubes in which an electron stream interacts with a wave travelling along a delay line or equivalent sequence of impedance elements, and without magnet system producing an H-field crossing the E-field
- H01J25/38—Tubes in which an electron stream interacts with a wave travelling along a delay line or equivalent sequence of impedance elements, and without magnet system producing an H-field crossing the E-field the forward travelling wave being utilised
-
- 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
Landscapes
- Microwave Tubes (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
763,545. Travelling-wave tubes. WESTERN ELECTRIC CO., Inc. Oct. 20, 1954 [Oct. 21, 1953; Oct. 21, 1953], No. 30211/54. Class 39(1). In a travelling-wave tube comprising an electron gun assembly 10 and a collector assembly 11 connected by an elongated glass envelope 12 enclosing a helix 14 supported by three rods 15 preferably of ceramic material, increase in the temperature of the helix, due to excess radio frequency power which the helix is unable to transmit with consequent decrease in power output and efficiency, is reduced by collapsing a portion 18 of the envelope 12 into intimate contact with the rods 15 over a significant portion of their periphery. The length of the portion 18 is preferably about one third the length of the helix 14, and the envelope is collapsed from the shape shown in Fig. 2 to the shape shown in Fig. 3 in which the envelope is in contact with the rods 15 over a third or more of the periphery of each rod. The collapsing operation is carried out using the circuit arrangement shown in Fig. 6. An aligning tube 24 at one end of the helix 14 is connected by a lead 31 to a terminal pin 17, and a support ring 28 at the other end of the helix is connected through a fuse wire 30 to the collecting cylinder 27 to establish through the helix a direct current path which is completed by a lead 32, switch 33 and battery 39. The envelope is exhausted by a vacuum pump 36 connected by rubber tubing 37 to the collector cylinder 27, and current is passed through the helix sufficient to soften the glass envelope but not to such an extent that collapse occurs. A heat reflecting cylinder 40 is placed around the envelope to provide the additional heat necessary to allow atmospheric pressure to collapse the envelope. The cylinder 40 may cover the whole length of the envelope to be collapsed, or may be moved along the envelope, and is provided with a thermocouple 42, preferably in contact with the envelope 12, and a meter 43 to enable the collapse to be stopped before the envelope comes into contact with the helix. Either before or after the collapsing operation, the cylinder 40 is removed and the helix outgassed by passing a current through the direct current path. When evacuation has been completed, the fuse wire 30 is burnt out by application of a short high current, and the collector cylinder 27 is then sealed off. Specifications 726,823 and 734,771 are referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US387362A US2772939A (en) | 1953-10-21 | 1953-10-21 | Manufacture of traveling wave tubes |
Publications (1)
Publication Number | Publication Date |
---|---|
GB763545A true GB763545A (en) | 1956-12-12 |
Family
ID=23529549
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB30211/54A Expired GB763545A (en) | 1953-10-21 | 1954-10-20 | Improvements in or relating to travelling wave tubes and the manufacture thereof |
Country Status (6)
Country | Link |
---|---|
US (1) | US2772939A (en) |
BE (1) | BE532397A (en) |
DE (1) | DE1068389B (en) |
FR (1) | FR1107766A (en) |
GB (1) | GB763545A (en) |
NL (2) | NL190364A (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2956373A (en) * | 1957-04-30 | 1960-10-18 | Rca Corp | Glass bulb fabrication |
US3309187A (en) * | 1963-12-30 | 1967-03-14 | Westinghouse Electric Corp | Method of reshaping fabricated infrared-generating devices such as electric lamps and the like |
DE1262469B (en) * | 1963-12-30 | 1968-03-07 | Westinghouse Electric Corp | Process for the production of a tubular, curved electric infrared heater with a glass vessel closed by melting |
DD233747A3 (en) * | 1983-04-11 | 1986-03-12 | Komb Feinmechanische Werke Hal | METHOD AND DEVICE FOR PRODUCING A TRANSVERSAL EMBROIDERED OR RIBBED INTERNAL TUBE OF A DOUBLE-WALL SPECIAL GAS DISCHARGE TUBE HIGH ANGLE ELECTIVITY |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US832302A (en) * | 1903-06-12 | 1906-10-02 | Gen Electric | Method of sealing metal into glass or other vitreous material. |
GB476488A (en) * | 1936-06-05 | 1937-12-06 | Gen Electric Co Ltd | Improvements in the sealing of electric conductors into quartz envelopes |
US2651100A (en) * | 1949-04-29 | 1953-09-08 | Hunt Capacitors Ltd A | Manufacture of electrical capacitors |
GB664663A (en) * | 1949-09-01 | 1952-01-09 | Mullard Radio Valve Co Ltd | Improvements in travelling wave tubes |
US2671873A (en) * | 1951-09-06 | 1954-03-09 | Wilber L Meier | Cold cathode discharge device and method of manufacture |
GB707123A (en) * | 1952-04-29 | 1954-04-14 | English Electric Valve Co Ltd | Improvements in or relating to travelling wave tubes |
-
0
- DE DENDAT1068389D patent/DE1068389B/de active Pending
- NL NL96518D patent/NL96518C/xx active
- BE BE532397D patent/BE532397A/xx unknown
- NL NL190364D patent/NL190364A/xx unknown
-
1953
- 1953-10-21 US US387362A patent/US2772939A/en not_active Expired - Lifetime
-
1954
- 1954-06-29 FR FR1107766D patent/FR1107766A/en not_active Expired
- 1954-10-20 GB GB30211/54A patent/GB763545A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
NL190364A (en) | |
DE1068389B (en) | 1959-11-05 |
NL96518C (en) | |
BE532397A (en) | |
US2772939A (en) | 1956-12-04 |
FR1107766A (en) | 1956-01-05 |
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