US3106768A - Waveguides - Google Patents

Waveguides Download PDF

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Publication number
US3106768A
US3106768A US858144A US85814459A US3106768A US 3106768 A US3106768 A US 3106768A US 858144 A US858144 A US 858144A US 85814459 A US85814459 A US 85814459A US 3106768 A US3106768 A US 3106768A
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US
United States
Prior art keywords
waveguides
waveguide
helices
joined
helix
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
US858144A
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English (en)
Inventor
Gent Alfred Walter
Eaglesfield Charles Cecil
Lawrence Ralph Thomas
Crampton Leslie
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
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 International Standard Electric Corp filed Critical International Standard Electric Corp
Application granted granted Critical
Publication of US3106768A publication Critical patent/US3106768A/en
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/04—Fixed joints
    • H01P1/042—Hollow waveguide joints
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B2200/00—Constructional details of connections not covered for in other groups of this subclass
    • F16B2200/50—Flanged connections
    • F16B2200/506—Flanged connections bolted or riveted
    • 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
    • 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
    • Y10T403/00—Joints and connections
    • Y10T403/45—Flexibly connected rigid members
    • Y10T403/459—Helical spring type coupling

Definitions

  • This invention relates to long haul electrical waveguides intended for the transmission of intelligence at high frequencies in the H mode and has particular reference to improve methods of making joints between successive lengths of the helically wound circular waveguide described in British Patent No. 780,503 of L. Lewin et 211., issued November 27, 1957.
  • the present invention is directed to a method of making joints between successive lengths of circular waveguide in such manner that the joints do not lead to reflections. This is no easy problem and extreme accuracy in connecting the tubes together is essential.
  • the jointing of two helical waveguides comprises the steps of trimming the ends of the waveguides, of aligning the ends and of jointing them.
  • FIG. 1 illustrates the trimming of the ends of the waveguides.
  • FIGURE 2 shows an end of a length of a waveguide prepared for jointing by an external sleeve.
  • FIG. 3 shows the jointing of two helical waveguides by a fillet of cement.
  • FIGS. 4, 5, 6, and 7 show alternative methods of jointing sleeve terminated helical waveguides.
  • FIG. 1 A preferred method of trimming the ends is shown in FIG. 1 in which the face of the waveguide is cut along a helical surface separating two adjacent turns of the same pitch as the helix. This cut extends over one complete turn of the helix and terminates in a cut through the wire at right angles to its axis.
  • This operation is performed by means of a milling cutter which is carried on a rotating shaft parallel to the axis of the waveguide.
  • the cutter width is not less than the width of the helix wire.
  • the end 1 of the helically wound waveguide consists of an inner waveguide helix 2 of conducting material surrounded and supported by an outer helix 3 which is normally but not essentially made of wire of the same material as the inner helix, but which could be of any other material including an insulating material, provided it can be produced in wire form and wound to form a helix.
  • the outer helix 3 is terminated a few turns short of the termination of the inner helix 2.
  • a metal sleeve 4 with a stepped inner surface is then slipped over the end of the waveguide and attached to itby means of a suitable: cement.
  • the outer step 5 engages the end of the sup- I porting helix 3'.
  • the discontinuity between the two waveguides is reduced to a minimum by inserting the waveguide into the sleeve so that the end of the waveguide is flush with the face of the sleeve.
  • the trimmed ends of the waveguides can be jointed by means of a suitable cement. If the cement is applied to the trimmed faces of the Waveguides and the faces are pressed together, some cement will be squeezed into the interior of the waveguide where its presence would be harmful. This difiiculty is overcome in the preferred arrangement shown in FIG. 3.
  • the ends of two helically wound waveguides as described in British Patout No. 780,503 are shown-
  • the wire helices 9 and 10 forming the waveguides to be jointed are embedded in an insulating compound as shown at 11 and 12.
  • the faces of the two waveguides are machined as wasdescribed in connection with FIG. 1 i.e.
  • Waveguides terminated with metal sleeves in accordance with FIG. 2 can be joined in an exactly similar way if the sleeves are provided with chamfered mating surfaces.
  • sleeve terminated waveguides will be jointed together by other means, some of which are shown in FIGS. 4 to 7 in which only half of each joint is shown.
  • the two terminating rings 14 and 15 of the helical waveguides 16 and 17 are jointed by means of a third ring 18 which is cemented to rings 14 and 15.
  • FIG. 5 shows the use of sleeves 19 and 26 provided with flanges Z1 and 22'.
  • the flanges Fatented Get. 15, 1963 are bolted together as shown at 23.
  • the coaxiality of the joint is ensured by the shoulder 24. If required a gasket 25 can be inserted as shown.
  • the ring 26 is provided with an external screw thread 27 which is engaged by two internally threaded collars 28. These collars clamp together sleeves 29 and 3G and ensure the continuity of the internal waveguide boundary surface.
  • the ring 31 supports a number of clip members 32 arranged circumferentially, of which only one is shown, which engage with the specially shaped sleeves 33 and 34.
  • the mating surfaces of the sleeves have preferably helical shape as shown in FIG. 2.
  • a method of joining two helically wound circular waveguides comprising the steps of exposing the end surfaces to be joined by cutting the waveguides along helical lines of the same pitch as the helices of the waveguides with a milling cutter having a cylindrical cutting face which has a width at least equal to the diameter of the wires used to form the helices whereby the wires forming the helices are cut at substantially right angles to their longitudinal axes, axially aligning the waveguides to be joined, rotating the guides till the surfaces of the cut wires are adjacent one another and mechanically joining the two helical Waveguides to form a substantially continuous waveguide with minimum axial and circumferential gaps between the joined faces.
  • a method of joining two helically wound circular Waveguides having helically wound circular outer coverings which are wound from wire of the same diameter as the wire used to form the waveguides, arranged in the grooves formed by the waveguide helices, and terminated a few turns short of the ends of the Waveguides; and sleeves each of which is shaped to fit around the exposed turns of the waveguide at one end of each waveguide and the end turns of the outer covering adjacent thereto comprising the steps of exposing the end surfaces to be joined by cutting the waveguides along helical lines of the same pitch as the helices of the waveguides with a milling cutter having a cylindrical cutting face which has a width at least equal to the diameter of the wires used to form the helices whereby the wires forming the helices are cut at substantially right angles to their longitudinal axes, axially aligning the waveguides to be joined, rotating the guides till the surfaces of the cut wires are a jacent one another, mechanically joining the two helical waveguides to form
  • a method as claimed in claim 2 further comprising cementing each sleeve to its helical waveguide.
  • a method as claimed in claim 3 further comprising cutting the abutting faces of the sleeves along a helical line of the same pitch as the helix of the waveguide.
  • a method as claimed in claim 2 further comprising cementing a ring sleeve to the joined sleeves.
  • a method as claimed in claim 2 further comprising bolting the sleeves together by means of a flange on each sleeve.

Landscapes

  • Waveguide Connection Structure (AREA)
  • Processing Of Terminals (AREA)
US858144A 1958-12-19 1959-12-08 Waveguides Expired - Lifetime US3106768A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB41158/58A GB957708A (en) 1958-12-19 1958-12-19 Improvements in or relating to waveguides

Publications (1)

Publication Number Publication Date
US3106768A true US3106768A (en) 1963-10-15

Family

ID=10418369

Family Applications (1)

Application Number Title Priority Date Filing Date
US858144A Expired - Lifetime US3106768A (en) 1958-12-19 1959-12-08 Waveguides

Country Status (5)

Country Link
US (1) US3106768A (de)
BE (1) BE585785A (de)
CH (1) CH380792A (de)
DE (1) DE1107752B (de)
GB (1) GB957708A (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3250985A (en) * 1962-10-23 1966-05-10 Varian Associates Microwave cavity resonator
US3573681A (en) * 1969-03-12 1971-04-06 Bell Telephone Labor Inc Helical waveguide formed from dielectric ribbon having symmetrically disposed conductive strips on opposite sides
US3601721A (en) * 1969-02-14 1971-08-24 Justice Associates Inc Low loss coaxial conductor using overlapped and insulated helical wound strips
US4071834A (en) * 1975-06-12 1978-01-31 Les Cables De Lyon S.A. Helical wave guide

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2610078A (en) * 1945-09-21 1952-09-09 Dresser Ind Gasket for pipe joints

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2610078A (en) * 1945-09-21 1952-09-09 Dresser Ind Gasket for pipe joints

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3250985A (en) * 1962-10-23 1966-05-10 Varian Associates Microwave cavity resonator
US3601721A (en) * 1969-02-14 1971-08-24 Justice Associates Inc Low loss coaxial conductor using overlapped and insulated helical wound strips
US3573681A (en) * 1969-03-12 1971-04-06 Bell Telephone Labor Inc Helical waveguide formed from dielectric ribbon having symmetrically disposed conductive strips on opposite sides
US4071834A (en) * 1975-06-12 1978-01-31 Les Cables De Lyon S.A. Helical wave guide

Also Published As

Publication number Publication date
GB957708A (en) 1964-05-13
BE585785A (fr) 1960-06-20
CH380792A (de) 1964-08-15
DE1107752B (de) 1961-05-31

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