GB740852A - Means and method of supporting helical conductors - Google Patents

Means and method of supporting helical conductors

Info

Publication number
GB740852A
GB740852A GB21854/53A GB2185453A GB740852A GB 740852 A GB740852 A GB 740852A GB 21854/53 A GB21854/53 A GB 21854/53A GB 2185453 A GB2185453 A GB 2185453A GB 740852 A GB740852 A GB 740852A
Authority
GB
United Kingdom
Prior art keywords
helix
mandrel
assembly
rods
glaze
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
Application number
GB21854/53A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Publication of GB740852A publication Critical patent/GB740852A/en
Expired legal-status Critical Current

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
    • H01J23/02—Electrodes; Magnetic control means; Screens
    • H01J23/08—Focusing arrangements, e.g. for concentrating stream of electrons, for preventing spreading of stream
    • H01J23/087—Magnetic focusing arrangements
    • H01J23/0876—Magnetic focusing arrangements with arrangements improving the linearity and homogeniety of the axial field, e.g. field straightener
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/14—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by electrical means
    • B05D3/141—Plasma treatment
    • B05D3/142—Pretreatment
    • B05D3/144—Pretreatment of polymeric substrates
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G81/00—Macromolecular compounds obtained by interreacting polymers in the absence of monomers, e.g. block polymers
    • C08G81/02—Macromolecular compounds obtained by interreacting polymers in the absence of monomers, e.g. block polymers at least one of the polymers being obtained by reactions involving only carbon-to-carbon unsaturated bonds
    • C08G81/021—Block or graft polymers containing only sequences of polymers of C08C or C08F
    • C08G81/022—Block or graft polymers containing only sequences of polymers of C08C or C08F containing sequences of polymers of conjugated dienes and of polymers of alkenyl aromatic compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/0427—Coating with only one layer of a composition containing a polymer binder
    • 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
    • H01J23/02—Electrodes; Magnetic control means; Screens
    • H01J23/06—Electron or ion guns
    • H01J23/065—Electron or ion guns producing a solid cylindrical beam
    • 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
    • H01J23/02—Electrodes; Magnetic control means; Screens
    • H01J23/08—Focusing arrangements, e.g. for concentrating stream of electrons, for preventing spreading of stream
    • H01J23/083—Electrostatic focusing arrangements
    • 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
    • H01J23/02—Electrodes; Magnetic control means; Screens
    • H01J23/08—Focusing arrangements, e.g. for concentrating stream of electrons, for preventing spreading of stream
    • H01J23/087—Magnetic focusing arrangements
    • 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
    • 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
    • H01J23/30—Damping arrangements associated with slow-wave structures, e.g. for suppression of unwanted oscillations
    • 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
    • H01J23/36—Coupling devices having distributed capacitance and inductance, structurally associated with the tube, for introducing or removing wave energy
    • H01J23/40—Coupling devices having distributed capacitance and inductance, structurally associated with the tube, for introducing or removing wave energy to or from the interaction circuit
    • H01J23/42—Coupling devices having distributed capacitance and inductance, structurally associated with the tube, for introducing or removing wave energy to or from the interaction circuit the interaction circuit being a helix or a helix-derived slow-wave structure
    • 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
    • H01J23/36—Coupling devices having distributed capacitance and inductance, structurally associated with the tube, for introducing or removing wave energy
    • H01J23/40—Coupling devices having distributed capacitance and inductance, structurally associated with the tube, for introducing or removing wave energy to or from the interaction circuit
    • H01J23/48—Coupling devices having distributed capacitance and inductance, structurally associated with the tube, for introducing or removing wave energy to or from the interaction circuit for linking interaction circuit with coaxial lines; Devices of the coupled helices type
    • H01J23/50—Coupling devices having distributed capacitance and inductance, structurally associated with the tube, for introducing or removing wave energy to or from the interaction circuit for linking interaction circuit with coaxial lines; Devices of the coupled helices type the interaction circuit being a helix or derived from a helix
    • 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
    • H01J25/00—Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
    • H01J25/50—Magnetrons, i.e. tubes with a magnet system producing an H-field crossing the E-field
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P5/00—Coupling devices of the waveguide type
    • H01P5/08—Coupling devices of the waveguide type for linking dissimilar lines or devices
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q11/00—Electrically-long antennas having dimensions more than twice the shortest operating wavelength and consisting of conductive active radiating elements
    • H01Q11/02—Non-resonant antennas, e.g. travelling-wave antenna
    • H01Q11/08—Helical antennas
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C3/00—Angle modulation
    • H03C3/30—Angle modulation by means of transit-time tube
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H2/00—Networks using elements or techniques not provided for in groups H03H3/00 - H03H21/00
    • H03H2/005—Coupling circuits between transmission lines or antennas and transmitters, receivers or amplifiers
    • H03H2/006—Transmitter or amplifier output circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M5/00—Manual exchanges
    • H04M5/04—Arrangements for indicating calls or supervising connections for calling or clearing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2327/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
    • C08J2327/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
    • C08J2327/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
    • C08J2327/06—Homopolymers or copolymers of vinyl chloride
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2429/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Derivatives of such polymer

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Plasma & Fusion (AREA)
  • Physics & Mathematics (AREA)
  • Microwave Tubes (AREA)
  • Waveguides (AREA)
  • Communication Cables (AREA)
  • Details Of Aerials (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Particle Accelerators (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)

Abstract

740,852. High-frequency discharge apparatus. STANDARD TELEPHONES & CABLES, Ltd. Aug. 7, 1953 [Aug. 19, 1952], No. 21854/53. Class 39 (1). [Also in Group XXII] A helix assembly, especially for a travelling- wave tube, comprises a helix secured to longitudinal insulating support-rods by means of an intermediate glaze. In manufacture, the ceramic rods 2, 2a, 2b are cleaned by boiling in acid, then in distilled water, and, if desired, hydrogen fired. They are then sprayed with glaze 3, e.g. frit, and fired in air or other suitable atmosphere to make the glaze flow to a uniform thickness over the area to contact the helix 1. A tungsten helix is wound on a molybdenum mandrel and annealed at 1000‹ C. to set the helix. The helix and rod assemblies are then cut to the desired length and assembled together with the mandrel still present, using a jig. The assembly is wrapped with twisted tungsten wires at spaced intervals and then removed from the jig and fired for two minutes at 1000‹ C. in a gaseous atmosphere to bond the rods to the helix. If the helix exceeds a certain length the mandrel must be etched slightly before firing in order to avoid twisting or bending due to slight differences in thermal expansion of the components of the assembly. The assembly is freely suspended vertically during firing in a metal cylinder of high thermal conductivity so as to avoid sagging or twisting. The cylinder is surrounded by a ceramic casing provided with means for introducing the gaseous atmosphere, preferably nitrogen. The initial firing and annealing procedures may also be carried out with the components in a vertical position. After the bonding process the mandrel is removed by selective etching and the wrapping wires are cut away. A molybdenum mandrel, for example, can be dissolved in a solution of H 2 O, H 2 SO 4 and HNO 3 . The tungsten helix may be cleaned in a hydroxide solution. Additional elements such as magnetic shields or impedance matching devices can be glazed to the assembly during the bonding operation. There may be a number of supporting-rods other than three and the helix may be of different material, e.g. molybdenum. The input and output devices may be waveguides or coaxial lines. It is necessary that none of the glaze lies on the inner circumference of the helix. It is stated that the invention is applicable to helices used in other apparatus. The jig in which the elements are mounted is described in detail with reference to Figs. 4-6 (not shown).
GB21854/53A 1952-04-08 1953-08-07 Means and method of supporting helical conductors Expired GB740852A (en)

Applications Claiming Priority (18)

Application Number Priority Date Filing Date Title
US776923XA 1952-04-08 1952-04-08
DE316934X 1952-04-08
DE734963X 1952-07-05
US740852XA 1952-08-19 1952-08-19
US778846XA 1952-08-19 1952-08-19
US773393XA 1952-08-21 1952-08-21
US773783XA 1952-08-23 1952-08-23
US777224XA 1952-09-29 1952-09-29
US777225XA 1952-10-11 1952-10-11
US773394XA 1952-10-31 1952-10-31
DE745099X 1952-11-07
US756370XA 1952-11-19 1952-11-19
US754861XA 1953-04-01 1953-04-01
DE780806X 1953-04-18
DE771189X 1953-11-27
DE767078X 1954-04-03
US861229XA 1956-10-26 1956-10-26
US886318XA 1957-05-03 1957-05-03

Publications (1)

Publication Number Publication Date
GB740852A true GB740852A (en) 1955-11-23

Family

ID=31982865

Family Applications (20)

Application Number Title Priority Date Filing Date
GB8526/53A Expired GB734963A (en) 1952-04-08 1953-03-27 Arrangement for magnetic concentration of an electron beam in a travelling wave tube
GB8525/53A Expired GB766790A (en) 1952-04-08 1953-03-27 Improvements in or relating to travelling wave apparatus
GB21854/53A Expired GB740852A (en) 1952-04-08 1953-08-07 Means and method of supporting helical conductors
GB22491/53A Expired GB773393A (en) 1952-04-08 1953-08-14 R-f coupling arrangements for travelling wave tubes
GB22494/53A Expired GB773783A (en) 1952-04-08 1953-08-14 Travelling wave electron discharge devices
GB22493/53A Expired GB778846A (en) 1952-04-08 1953-08-14 Travelling wave tubes
GB24540/53A Expired GB776923A (en) 1952-04-08 1953-09-04 Travelling wave electron discharge devices
GB25817/53A Expired GB777224A (en) 1952-04-08 1953-09-18 Travelling wave electron discharge devices
GB26447/53A Expired GB777225A (en) 1952-04-08 1953-09-25 Travelling wave electron discharge devices
GB26450/53A Expired GB745099A (en) 1952-04-08 1953-09-25 Arrangement for magnetic concentration of an electron beam in a travelling wave tube
GB27869/53A Expired GB756370A (en) 1952-04-08 1953-10-09 Travelling wave electron discharge devices
GB29510/53A Expired GB773394A (en) 1952-04-08 1953-10-26 Magnet arrangements for travelling wave tubes
GB8924/54A Expired GB754861A (en) 1952-04-08 1954-03-26 Arrangements for coupling a coaxial transmission line to a helix slow wave structure
GB10496/54A Expired GB754563A (en) 1952-04-08 1954-04-09 Arrangement for magnetic concentration of an electron beam in a travelling wave tube
GB10495/54A Expired GB780806A (en) 1952-04-08 1954-04-09 Improvements in or relating to the provision of localised attenuation in travelling wave tubes
GB33565/54A Expired GB771189A (en) 1952-04-08 1954-11-19 Travelling wave tube
GB8858/55A Expired GB767078A (en) 1952-04-08 1955-03-25 Travelling wave tube
GB5891/56A Expired GB810267A (en) 1952-04-08 1956-02-24 Focusing magnet for long electron beams
GB33384/57A Expired GB861229A (en) 1952-04-08 1957-10-25 Radio frequency impedance matching section
GB14052/58A Expired GB886318A (en) 1952-04-08 1958-05-02 Travelling wave electron discharge device

Family Applications Before (2)

Application Number Title Priority Date Filing Date
GB8526/53A Expired GB734963A (en) 1952-04-08 1953-03-27 Arrangement for magnetic concentration of an electron beam in a travelling wave tube
GB8525/53A Expired GB766790A (en) 1952-04-08 1953-03-27 Improvements in or relating to travelling wave apparatus

Family Applications After (17)

Application Number Title Priority Date Filing Date
GB22491/53A Expired GB773393A (en) 1952-04-08 1953-08-14 R-f coupling arrangements for travelling wave tubes
GB22494/53A Expired GB773783A (en) 1952-04-08 1953-08-14 Travelling wave electron discharge devices
GB22493/53A Expired GB778846A (en) 1952-04-08 1953-08-14 Travelling wave tubes
GB24540/53A Expired GB776923A (en) 1952-04-08 1953-09-04 Travelling wave electron discharge devices
GB25817/53A Expired GB777224A (en) 1952-04-08 1953-09-18 Travelling wave electron discharge devices
GB26447/53A Expired GB777225A (en) 1952-04-08 1953-09-25 Travelling wave electron discharge devices
GB26450/53A Expired GB745099A (en) 1952-04-08 1953-09-25 Arrangement for magnetic concentration of an electron beam in a travelling wave tube
GB27869/53A Expired GB756370A (en) 1952-04-08 1953-10-09 Travelling wave electron discharge devices
GB29510/53A Expired GB773394A (en) 1952-04-08 1953-10-26 Magnet arrangements for travelling wave tubes
GB8924/54A Expired GB754861A (en) 1952-04-08 1954-03-26 Arrangements for coupling a coaxial transmission line to a helix slow wave structure
GB10496/54A Expired GB754563A (en) 1952-04-08 1954-04-09 Arrangement for magnetic concentration of an electron beam in a travelling wave tube
GB10495/54A Expired GB780806A (en) 1952-04-08 1954-04-09 Improvements in or relating to the provision of localised attenuation in travelling wave tubes
GB33565/54A Expired GB771189A (en) 1952-04-08 1954-11-19 Travelling wave tube
GB8858/55A Expired GB767078A (en) 1952-04-08 1955-03-25 Travelling wave tube
GB5891/56A Expired GB810267A (en) 1952-04-08 1956-02-24 Focusing magnet for long electron beams
GB33384/57A Expired GB861229A (en) 1952-04-08 1957-10-25 Radio frequency impedance matching section
GB14052/58A Expired GB886318A (en) 1952-04-08 1958-05-02 Travelling wave electron discharge device

Country Status (7)

Country Link
US (4) US2843789A (en)
BE (15) BE519037A (en)
CH (8) CH316934A (en)
DE (2) DE963704C (en)
FR (18) FR65473E (en)
GB (20) GB734963A (en)
NL (3) NL196187A (en)

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US5596797A (en) * 1995-04-03 1997-01-28 D & M Plastics Corporation Method and apparatus for making a molded cellular antenna coil
CN109713451A (en) * 2017-10-25 2019-05-03 三星电机株式会社 Antenna assembly and portable terminal including the antenna assembly

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US3544832A (en) * 1968-07-18 1970-12-01 Rca Corp Traveling wave tube with evaporated nickel attenuator coating and method of manufacture thereof
FR2137311B1 (en) * 1971-05-18 1973-05-11 Thomson Csf
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US4945320A (en) * 1986-02-18 1990-07-31 Teldix Gmbh Microwave switch having at least two switching positions
FR2711277B1 (en) * 1993-10-14 1995-11-10 Alcatel Mobile Comm France Antenna of the type for portable radio device, method of manufacturing such an antenna and portable radio device comprising such an antenna.
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GB2296370B (en) * 1994-12-19 1998-07-29 Eev Ltd Travelling wave tubes
CN112692542B (en) * 2020-12-31 2023-03-17 山东微波电真空技术有限公司 Automatic assembly equipment for spiral line, clamping rod and pipe shell

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US2660690A (en) * 1948-10-15 1953-11-24 Sylvania Electric Prod Traveling wave tube
US2730647A (en) * 1949-06-22 1956-01-10 Bell Telephone Labor Inc Microwave amplifier
US2585582A (en) * 1949-07-07 1952-02-12 Bell Telephone Labor Inc Electron gun
GB696058A (en) * 1949-07-15 1953-08-26 Nat Res Dev Improvements in electron discharge tubes
FR1012374A (en) * 1949-07-27 1952-07-09 Improvements in the construction of traveling wave electron tubes
GB664663A (en) * 1949-09-01 1952-01-09 Mullard Radio Valve Co Ltd Improvements in travelling wave tubes
US2649578A (en) * 1949-12-02 1953-08-18 Bell Telephone Labor Inc Wave-guide elbow
US2749472A (en) * 1952-01-02 1956-06-05 Univ Leland Stanford Junior Travelling wave tubes

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5596797A (en) * 1995-04-03 1997-01-28 D & M Plastics Corporation Method and apparatus for making a molded cellular antenna coil
CN109713451A (en) * 2017-10-25 2019-05-03 三星电机株式会社 Antenna assembly and portable terminal including the antenna assembly
CN109713451B (en) * 2017-10-25 2020-12-29 株式会社Wits Antenna device and portable terminal including the same

Also Published As

Publication number Publication date
GB861229A (en) 1961-02-15
GB778846A (en) 1957-07-10
GB756370A (en) 1956-09-05
DE963704C (en) 1957-05-09
GB780806A (en) 1957-08-07
US2857547A (en) 1958-10-21
CH330643A (en) 1958-06-15
NL95555C (en) 1900-01-01
FR65589E (en) 1956-02-28
CH316934A (en) 1956-10-31
CH329897A (en) 1958-05-15
FR68804E (en) 1958-06-10
GB777224A (en) 1957-06-19
BE523177A (en) 1900-01-01
BE534531A (en) 1900-01-01
BE523897A (en) 1900-01-01
FR65606E (en) 1956-02-29
FR68407E (en) 1958-04-30
FR65608E (en) 1956-02-29
FR66230E (en) 1956-06-05
FR69068E (en) 1958-09-22
GB771189A (en) 1957-03-27
FR65473E (en) 1956-02-21
GB767078A (en) 1957-01-30
US2812469A (en) 1957-11-05
FR68403E (en) 1958-04-30
BE519037A (en) 1900-01-01
BE524061A (en) 1900-01-01
US2911599A (en) 1959-11-03
GB773783A (en) 1957-05-01
BE523117A (en) 1900-01-01
CH333699A (en) 1958-10-31
BE528213A (en) 1900-01-01
BE545710A (en) 1900-01-01
FR69062E (en) 1958-09-22
GB773394A (en) 1957-04-24
FR65616E (en) 1956-02-29
GB754861A (en) 1956-08-15
BE527787A (en) 1900-01-01
BE523425A (en) 1900-01-01
CH317676A (en) 1956-11-30
GB776923A (en) 1957-06-12
BE522186A (en) 1900-01-01
GB886318A (en) 1962-01-03
US2843789A (en) 1958-07-15
FR66421E (en) 1957-02-27
GB766790A (en) 1957-01-23
GB773393A (en) 1957-04-24
GB734963A (en) 1955-08-10
FR66233E (en) 1956-06-05
GB777225A (en) 1957-06-19
CH335353A (en) 1958-12-31
NL98392C (en) 1900-01-01
GB745099A (en) 1956-02-22
BE524397A (en) 1900-01-01
BE522303A (en) 1900-01-01
CH334111A (en) 1958-11-15
FR68807E (en) 1958-06-10
GB810267A (en) 1959-03-11
GB754563A (en) 1956-08-08
BE521167A (en) 1900-01-01
CH322499A (en) 1957-06-15
NL196187A (en) 1900-01-01
FR65591E (en) 1956-02-28
FR65607E (en) 1956-02-29
FR66228E (en) 1956-06-05
FR68404E (en) 1958-04-30
DE1080702B (en) 1960-04-28
BE523116A (en) 1900-01-01

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