EP0183394A2 - Collier de fixation de guide d'ondes - Google Patents

Collier de fixation de guide d'ondes Download PDF

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Publication number
EP0183394A2
EP0183394A2 EP85307798A EP85307798A EP0183394A2 EP 0183394 A2 EP0183394 A2 EP 0183394A2 EP 85307798 A EP85307798 A EP 85307798A EP 85307798 A EP85307798 A EP 85307798A EP 0183394 A2 EP0183394 A2 EP 0183394A2
Authority
EP
European Patent Office
Prior art keywords
hanger
waveguide
legs
prongs
support member
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.)
Withdrawn
Application number
EP85307798A
Other languages
German (de)
English (en)
Other versions
EP0183394A3 (fr
Inventor
Richard Charles Juds
John Paul Morris
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.)
Commscope Technologies AG
Original Assignee
Andrew AG
Andrew LLC
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 Andrew AG, Andrew LLC filed Critical Andrew AG
Publication of EP0183394A2 publication Critical patent/EP0183394A2/fr
Publication of EP0183394A3 publication Critical patent/EP0183394A3/fr
Withdrawn legal-status Critical Current

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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

Definitions

  • This invention relates generally to a hanger and, more particularly, to a hanger for supporting a length of waveguide of the type used, for example, as a transmission line in a microwave antenna system.
  • the invention has more specific reference to hangers for waveguide of elliptical cross-section and extending from transmitting or receiving equipment in an equipment shelter to an antenna mounted on a tall tower.
  • a large number of hangers is required to support the waveguide beneath a horizontal waveguide bridge extending between the shelter and the base of the tower and to support the waveguide on the tower as the waveguide extends upwardly to the antenna.
  • An even larger number of hangers is required in those instances where separate waveguides extend to several antennas on a single tower.
  • a typical hanger for elliptical waveguide comprises a generally U-shaped clip or clamp adapted to be attached to a support member on the bridge or the tower by a bolt extending through a hole in the support member and held in place by a nut and lock washer.
  • the waveguide is strung along the bridge and up the tower and is clamped between the legs of each U-shaped hanger by tightening a clamping screw which extends between the legs.
  • a considerable amount of installation time is required, first to attach the large number of hangers to the bridge and the tower and then to clamp the waveguide within the hangers.
  • auxiliary hardware i.e. screws, bolts, nuts and washers
  • the general aim of the present invention is to provide a new and improved waveguide hanger which may be attached to the support member and clamped to the waveguide in a faster and easier manner than prior hangers and which may be attached and clamped without requiring any auxiliary hardware and without requiring the use of tools.
  • a related object of the invention is to provide a waveguide hanger which may be simply snapped into an installed position on the support member and, as an incident thereto, automatically clamps the waveguide in such a manner as to securely hold the waveguide without deforming and degrading the waveguide.
  • a more detailed object is to achieve the foregoing by providing a hanger in the form of a resiliently yieldable and generally U-shaped clip adapted to be slipped into straddling relation with the waveguide and simultaneously assembled with the support member with a snap fit.
  • the invention also resides in the novel construction of the hanger permitting the hanger to be turned to a position to accommodate the waveguide during installation and thereafter restricting further turning of the hanger.
  • a hanger for attaching a length of waveguide to a support member characterised in that said hanger comprises a generally U-shaped strip the legs of which are interconnected at their outer ends by a bridge which supports said legs to flex apart and toward one another from respective relaxed positions and to spring back toward said relaxed positions, said legs being capable of being flexed apart as an incident to the U-shaped strip being moved lengthwise into straddling relation with a said waveguide and thereafter springing toward one another and embracing said waveguide, the inner end portions of said legs terminating in a pair of prongs which are capable of being flexed toward one another as an incident to being inserted into an opening in said support member and thereafter springing apart into engagement with the edge of said opening.
  • the hanger 10 of the invention is shown in the drawings in conjunction with a microwave antenna system used for telecommunications.
  • the system comprises one or more microwave antennas 11 mounted on a tower 12 which may have a height in the neighbourhood of 750 feet.
  • 'A signal transmission line 15 is connected to each antenna and extends downwardly along the tower. Near the base of the tower, the transmission line extends horizontally beneath a waveguide bridge 16 to a shelter 17 which houses transmitting and/or receiving equipment. In some installations, the bridge also may be several feet long.
  • the signal transmission line 15 is an elliptical waveguide of the type sold by the assignee of the present invention under the Trade Mark HELIAX.
  • the waveguide 15 comprises corrugated copper tubing 18 ( Figure 2) formed with an elliptical cross-section and protected by a polyethylene jacket 19.
  • Hangers 10 are used to attach the elliptical waveguide 15 to support members of crossbars 20 ( Figures 1 and 5) on the tower 12 at a maximum of four foot intervals and with the longer axis of the ellipse extending perpendicular to the crossbars.
  • the hangers are used to attach the waveguide at approximately the same intervals to horizontal support members 21 beneath the bridge 16.
  • a large number of hangers must be installed to support the waveguide along its entire length.
  • a system with a tall tower and several antennas may require several hundred hangers.
  • the present invention contemplates the provision of a relatively simple and low-cost hanger 10 which may be attached quickly and easily to the support member 20 or 21 with a simple snap-in action and without need of tools or auxiliary fasteners.
  • the hanger moves into straddling relation with the waveguide 15 and then clamps the waveguide in such a manner as to hold the waveguide in place without deforming the waveguide and degrading the electrical characteristics thereof.
  • both attachment of the hanger and clamping of the waveguide may be accomplished with a simple one-step operation so as to significantly reduce the installation time and to effect a considerable saving in labour required for the installation of the hangers and waveguide of each tower.
  • the hanger 10 which has been illustrated in detail in Figures 2 to 8 is a hanger which is used to attach the waveguide 15 to a crossbar 20 of the tower 12 and thus the hanger has been shown as extending horizontally outwardly from the crossbar.
  • Identical hangers are used to attach the waveguide to the support members 21 on the bridge but, in such a case, the hangers extend upwardly from the support members.
  • direction-indicating terms such as upper, lower, horizontal and vertical will be used in describing the horizontally extending hanger of Figures 2 to 8 and it should be understood that the vertically extending hangers are different only as a matter of orientation.
  • the hanger 10 is made from a single strip of resiliently yieldable material; preferably stainless steel having a thickness of about .035".
  • the strip is bent generally in the shape of a U so as to form two transversely spaced and horizontally extending legs 25 and to form a bridge 26 extending between the outer end portions of the legs.
  • Each leg is curved or bowed into a convex-concave shape.
  • the opposing inboard sides of the two legs are concave and correspond generally in shape to the longer sides of the ellipse defined by the outer periphery of the waveguide 15.
  • teeth 28 are formed on the inboard side of each leg by inwardly depressing the outboard side of the leg.
  • the teeth are located adjacent the corner portions of the leg and tend to bite into the polyethylene jacket 19 of the waveguide in the installed position of the hanger (see Figs. 7 and 8).
  • the teeth promote secure gripping of the waveguide by the legs 25.
  • the bridge 26 of the present hanger 10 is flat and planar and defines a resilient hinge connection between the legs 25.
  • the legs may flex transversely apart and flex transversely toward one another from unstressed or relaxed positions located between the spread and contracted positions. When the spreading or contracting force is removed, the legs spring back toward the relaxed positions.
  • the inner end portion of the hanger 10 is adapted to be snapped into a circular hole 30 of predetermined diameter formed through the crossbar 20.
  • finger-like prongs 31 are formed integrally with and project inwardly from the inner end portions of the legs 25 midway between the upper and lower edges thereof.
  • Each prong is generally semi-circular in radial cross-section and its outboard side is curved on substantially the same radius as the hole 30.
  • the outer end portions of the prongs are tapered inwardly as indicated at 32 to facilitate initial insertion of the prongs into the hole 30.
  • a stiffening gusset 33 (Figs. 3 and 5) extends horizontally across the junction between the outer end of each leg and the inner end portion of the respective prong to help keep the prong from flexing or bending relative to the leg.
  • Transversely extending detents 35 are formed on the outboard sides of the prongs 31 to hold the prongs against removal from the hole 30 once the prongs have been inserted in the hole.
  • Each detent is a shear-formed bubble having an inclined outboard surface and having an outwardly facing shoulder located outwardly of the inclined surface.
  • the hanger 10 is completed by feet 37 (Figs. 2 to 4) which engage the outer side of the crossbar 20 to restrict turning of the hanger once the hanger has been installed.
  • Two feet are formed on the outer end of each leg 25 by bending the outer end portion of the leg transversely into a curved shape, the feet on each leg extending transversely away from the feet on the other leg.
  • the feet 37 of each leg 25 are spaced above and below the prong 31 of the leg so that slots 38 appear between the feet and the prong when the hanger is viewed in side elevation as in Fig. 5.
  • the two prongs 31 are spaced transversely from one another by a distance considerably greater than the diameter of the hole 30 in the crossbar 20 but somewhat less than the diameter along the minor axis of the ellipse defined by the waveguide 15.
  • the maximum transverse dimension between the inboard sides of the legs 25 is somewhat greater than the minor diameter of the waveguide.
  • Installation of the hanger 10 takes place initially while the hanger is relaxed. Such installation is effected by moving the hanger horizontally and inwardly toward the waveguide 15 in a direction extending parallel to the major axis of the waveguide (see Fig. 2). Once the prongs 31 start engaging the waveguide, the waveguide cams against the prongs and causes the prongs and the legs 25 to spread so that the prongs may slip past the minor axis diameter of the waveguide. After being moved past the waveguide, the prongs spring back to their normal position.
  • the legs 25 are manually squeezed together to close the prongs 31 to an effective diameter approximating the diameter of the hole 30 and allow insertion of the prongs into the hole.
  • both the tapered surfaces 32 of the prongs and the inclined surfaces of the detents 35 may cam against the edge of the hole to squeeze the prongs toward one another as they pass into the hole.
  • the squeezing pressure on the legs 25 is relaxed to allow the prongs 31 to spread against the resiliency of the material until the spreading is stopped by engagement of the arcuate outboard surfaces of the prongs with the circular edge of the hole.
  • the shoulders of the detents 35 engage the inner surface of the crossbar 20 adjacent the hole 30 and prevent the prongs from being withdrawn from the hole (see Fig. 7).
  • the prongs are virtually locked in the hole as a result of the waveguide 15 acting as a wedge and camming against the inner end portions of the legs 25 to force the prongs to spread and thereby keep the detents in engagement with the inner side of the crossbar.
  • Inward shifting of the hanger is prevented by virtue of the four feet 37 engaging the outer side of the crossbar 20.
  • such engagement prevents the hanger from rocking either upwardly and downwardly or from side-to-side.
  • the hanger is capable of rotating about the axis of the hole 30 prior to the time the prongs 31 fully enter the hole and thus, during the installation, the hanger may be turned as necessary to accommodate any deviation in the orientation of the waveguide.
  • the legs 25 closely embrace and grip the waveguide 15 to prevent any shifting of the waveguide in the hanger (see Fig. 7).
  • the gripping is enhanced by the teeth 28.
  • the hanger clamps the waveguide to prevent shifting thereof, the clamping force is not sufficiently great to deform the waveguide and degrade its electrical characteristics.
  • the present invention brings to the art a new and simplified hanger 10 which may be installed on the waveguide 15 and, at the same time, attached to the crossbar 20 (or the support member 21).
  • the one-step installation may be effected without the use of tools or fasteners and results in a significant saving of time during the installation of a large number of hangers.
  • the clamping force which is exerted on the waveguide is predetermined by the hanger itself and thus there is no danger of the installer undertightening or overtightening clamping screws.

Landscapes

  • Support Of Aerials (AREA)
  • Waveguides (AREA)
  • Supports For Pipes And Cables (AREA)
  • Connection Of Plates (AREA)
  • Waveguide Connection Structure (AREA)
EP85307798A 1984-11-26 1985-10-29 Collier de fixation de guide d'ondes Withdrawn EP0183394A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US67455884A 1984-11-26 1984-11-26
US674558 1984-11-26

Publications (2)

Publication Number Publication Date
EP0183394A2 true EP0183394A2 (fr) 1986-06-04
EP0183394A3 EP0183394A3 (fr) 1988-07-20

Family

ID=24707078

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85307798A Withdrawn EP0183394A3 (fr) 1984-11-26 1985-10-29 Collier de fixation de guide d'ondes

Country Status (4)

Country Link
EP (1) EP0183394A3 (fr)
JP (1) JPS61180007A (fr)
AU (1) AU583304B2 (fr)
CA (1) CA1288220C (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1020672A1 (fr) * 1999-01-12 2000-07-19 Andrew A.G. Collier de serrage d'une ligne de transmission
WO2002095956A3 (fr) * 2001-05-23 2003-09-18 Andrew Corp Suspension de ligne de transmission empilable
WO2006068550A1 (fr) 2004-12-22 2006-06-29 Telefonaktiebolaget Lm Ericsson (Publ) Dispositif pour la communication par antenne
US7090174B2 (en) 2001-11-09 2006-08-15 Andrew Corporation Anchor rail adapter and hanger and method

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63130054A (ja) * 1986-11-19 1988-06-02 アロカ株式会社 超音波診断装置
JP5998592B2 (ja) * 2011-07-21 2016-09-28 三菱樹脂株式会社 留め具及びキャップの接続構造

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE6912883U (de) * 1969-03-29 1969-10-02 Kabel Metallwerke Ghh Vorrichtung zum zugentlasteten einfuehren einer elektrischen leitung in ein festes gehaeuse
FR2088051B1 (fr) * 1970-05-12 1976-09-03 Kabel Metallwerke Ghh
NL7116385A (fr) * 1971-11-26 1972-04-25
DE2807119C2 (de) * 1978-02-20 1986-04-10 Fa. A. Raymond, 7850 Lörrach Kabelschelle für variable Kabeldurchmesser

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1020672A1 (fr) * 1999-01-12 2000-07-19 Andrew A.G. Collier de serrage d'une ligne de transmission
US6161804A (en) * 1999-01-12 2000-12-19 Andrew Corporation Transmission line hanger
US6899305B2 (en) 1999-01-12 2005-05-31 Andrew Corporation Stackable transmission line hanger
WO2002095956A3 (fr) * 2001-05-23 2003-09-18 Andrew Corp Suspension de ligne de transmission empilable
CN1293335C (zh) * 2001-05-23 2007-01-03 安德鲁公司 可叠置传输线支架
US7090174B2 (en) 2001-11-09 2006-08-15 Andrew Corporation Anchor rail adapter and hanger and method
WO2006068550A1 (fr) 2004-12-22 2006-06-29 Telefonaktiebolaget Lm Ericsson (Publ) Dispositif pour la communication par antenne

Also Published As

Publication number Publication date
EP0183394A3 (fr) 1988-07-20
AU4847685A (en) 1986-06-05
AU583304B2 (en) 1989-04-27
CA1288220C (fr) 1991-09-03
JPS61180007A (ja) 1986-08-12

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Inventor name: MORRIS, JOHN PAUL

Inventor name: JUDS, RICHARD CHARLES