US3603717A - Crossarm assembly - Google Patents

Crossarm assembly Download PDF

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Publication number
US3603717A
US3603717A US1175A US3603717DA US3603717A US 3603717 A US3603717 A US 3603717A US 1175 A US1175 A US 1175A US 3603717D A US3603717D A US 3603717DA US 3603717 A US3603717 A US 3603717A
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US
United States
Prior art keywords
crossarm
support legs
assembly
set forth
cross arm
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
US1175A
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English (en)
Inventor
Arthur L Scott
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.)
C/P Corp
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C/P 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 C/P Corp filed Critical C/P Corp
Application granted granted Critical
Publication of US3603717A publication Critical patent/US3603717A/en
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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G7/00—Overhead installations of electric lines or cables
    • H02G7/20—Spatial arrangements or dispositions of lines or cables on poles, posts or towers
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
    • E04H12/24—Cross arms

Definitions

  • Chspin ABSTRACT The crosssnn assembly is made of electrically nonconductive noneorrosive materials within an arcuate crossann and a pair of legs for supporting the arcuste crossarm on a pole.
  • Channel-shaped brackets are used to secure the armate crossarm to each leg while a dowel pin is inserted within mating recesses of the crossarm and the support legs in order to position the crossarm and to resist the loading of the cros- CROSSARM ASSEMBLY
  • This invention relates to a crossarm assembly. More particularly, this invention relates to a crossarm assembly for electrical distribution lines.
  • crossarm assemblies have been utilized, for example, for electrical distribution lines.
  • these assemblies have been made with components formed of various types of materials such as laminated wood in order to be electrically nonconductive while being resistant to weathering.
  • the supports for supporting or securing the crosspieces to the pole have simply been made of wood. In such cases, the wood is subjected to the corrosive effects of weathering and therefore requires periodic replacement.
  • the crossarm assemblies have consisted of a horizontal crosspiece which is secured to a vertical pole in various manners. Because of this arrangement, the horizontal crosspieces have been designed either for left-hand or right-hand construction. That is, since the crosspieces must be secured to one or the other side of the pole with respect to the distribution lines, the securing means, such as supporting struts and bolts, must be constructed so as to secure the crosspieces to either side of the pole.
  • the invention provides a crossarm assembly including a crosspiece and a pair of support legs which support the crosspiece symmetrically above a vertical pole.
  • the crosspiece and the support legs are made of noncorrosive nonconductive material, for example, resin impregnated glass fibers.
  • the crossarm is formed in a arcuate curvilinear shape and is positioned concave up with respect to the pole while in another instance the crossarm can be positioned concave down.
  • suitable securing means are used.
  • the crossarm and support legs are made as solid components.
  • a dowel pin is positioned within mating recesses within each of the crossarm and support legs while a pair of channel-shaped retaining brackets are disposed about the arcuate crossarm and are secured to the support legs.
  • the dowel pins can be made of metalic or nonmetalic material and may be of any suitable cross section. These dowel pins assure proper positioning of the crossarm and prevent the crossarm from slipping endwise relative to the support legs due to the normal stresses imposed on such a crossarm structure.
  • the dowel pins also absorb some of the load in a direction normal to the crossarm which would otherwise be imposed entirely on the channel shaped retaining brackets.
  • the dowel pins can be fitted within the respective recesses by either a friction fit, a slip fit, or a loose fit.
  • the channel shaped brackets which are used to secure the arcuate crossarm with respect to the support legs can be made of any suitable material such as reinforced plastic glass fibers, metal or other material.
  • any suitable securing means can be used.
  • a plurality of bolts may be passed through the legs of the brackets as well as through the support legs to cooperate with suitable nuts.
  • the brackets can be secured by pegs, for example, of nonmetalic material which are held in place by an adhesive. Such pegs can be made straight or with heads which abut the sidewalls of the bracket.
  • the joint between the arcuate crossarm and the support legs could also be made on a mechanical basis.
  • the space between the mating and abutting surfaces of the crossarm and support legs can be filled with an adhesive such as epoxy to increase strength of the joint therebetween or with a caulking compound to prevent water from seeping in to cause problems either by freezing or by introducing the deposits of contaminated material which could produce a nondesirable electrical conductive condition.
  • the crossarm assembly is installed at the top of the vertical pole such that the transmission lines and ground lines are clear of the vertical pole so that any interference by the vertical pole is avoided.
  • the conventional ground wire can be positioned on the crossarm in symmetrical relationship.
  • the support legs can be secured to the pole, for example, by a bolt which passes through the center of the pole.
  • FIG. 1 illustrates a front view of the crossarm assembly ac cording to the invention
  • FIG. 2 illustrates a view taken on line 2-2 of FIG. I
  • FIG. 3 illustrates an exploded view of the crossarm, a support leg, dowel pin and retaining bracket
  • FIG. 4 illustrates a modified securing means for securing the bracket to the support leg
  • FIG. 5 illustrates a further modification of the means for securing the bracket to the support leg.
  • the crossarm assembly I0 is mounted on the upper end of a vertically disposed pole ll symmetrically thereof by a pair of bolt assemblies 12.
  • the crossarm assembly 10 is constructed of an arcuate crosspiece 13, a pair of support legs 14 which support the arcuate crosspiece 13 on the vertical pole II, and securing means 15 which secure the arcuate crosspiece 13 to the support leg I4.
  • the arcuate crosspiece I3 is formed in any suitable shape, such as a curvilinear shape and is disposed in a concave up relationship to the pole 11.
  • the crosspiece I3 is constructed of a solid rectangular cross section so as to be substantially uniform from end to end.
  • This crosspiece I3 serves to support a plurality of electrically nonconductive conductor supports I6 thereon for suitable conductors I7 as are known.
  • the crosspiece I3 serves to support any suitable ground wire (not shown) thereon in a symmetrical relationship to the pole I1.
  • the conductor support I6 can be secured by the crosspiece 13 by any suitable bolt assembly 18 and can be symmetrically arranged along the crosspiece I3 relative to the pole 11 so as to avoid any eccentric loadings on the pole II and crossarm assembly 10.
  • the crosspiece I3 is constructed of resin impregnated glass fibers in a known manner.
  • the support legs [4 are of solid rectangular cross section and are secured at one end by the bolt assemblies I2 to the vertical pole II while the opposite ends are secured by the securing means I5 to the crosspiece 13. As shown, the support legs I4 flare outwardly of the projected central line of the pole II so as to support the crosspiece I3 near the opposite ends thereof. In this case, the support legs 14 form a Y-shaped profile with the pole II for supporting the crosspiece 13. As above, the support legs I4 are also made of resin impregnated glass fiber material so as to present a nonconductive path.
  • the securing means 15 includes a dowel pin 19 which is secured within mating recesses 20, 21 within the support legs 14 and crosspiece [3, respectively, a channel-shaped bracket 22 which passes around the crosspiece l3 and suitable bolt assemblies 23 which secure the bracket 22 to the support legs 14.
  • Each dowel pin 19 is received in any suitable fashion within the recess 20 in the end of support leg 14.
  • the dowel pin 19 can be received with a frictional fit, slip fit or loose fit.
  • the recesses 21 in the crosspiece 13 are similarly dimensioned to receive the dowel pin 19.
  • the channel-shaped retaining bracket 22 is sized to pass over the crosspiece l3 and to extend downwardly along the side of each of the support legs 14. As shown, a pair of bolt assemblies 23 are used to secure the bracket 22 to each support leg 14.
  • the securing means 15 can be constructed of any suitable material.
  • the channel-shaped brackets 22 can be made of reinforced plastic glass fibers, metal or other materials
  • the dowel pin 19 can be made of similar material
  • the bolts 23 can be made of metal, plastic or glass fiber material.
  • the support legs 14 are first secured to the pole 11 by the pair of bolt assemblies 12 as is known. Thereafter, the dowel pins 19 are inserted into the respective recesses 20 in the ends of the support legs 14 and the arcuate crosspiece 13 is inserted over these dowel pins 19. The dowel pins 19 serve to restrain the crosspiece 13 against endwise movement relative to the support legs l4.
  • the retaining bracket 22 is slipped over the crosspiece l3 and disposed over suitable bores 24 passing through the support legs 14 to receive the bolt assemblies 23.
  • a pair of bolt assemblies 23 are then passed through the legs of the brackets 22 and support legs 14 and secured in place.
  • the bolt assemblies 18 and conductor supports 16 can then be mounted on the crosspiece 13.
  • the securing means can utilize pegs 26 to secure the retaining bracket 22 to the support legs 14.
  • pegs 26 can be made of cylindrical cross sections to mate with a friction fit within the brackets 22 while passing through the support legs 14.
  • a suitable adhesive can be used to bond the pegs 26 to the support leg 14 or brackets 22 or both.
  • These pegs 26 can also be made of any suitable material such as plastics, glass fibers or metal.
  • the securing means 15" can also utilize pegs or pins having heads 28 to dispose against the ends of the bracket 22, that is, against the exterior surfaces of the bracket 22. As shown, four such pegs 27 are used with two passing through holes in the respective ends of the brackets 22 into the bores 24 of the support leg 14. As above, the pegs 27 can be fitted with a friction fit into the support leg 14 and or can be provided with an adhesive securing means.
  • the invention thus provides a crossarm assembly which can be easily and quickly mounted on a pole with a minimal effort and expense.
  • the crossarm assembly permits the conductors to be supported to be arranged symmetrically with respect to the pole. in this way, eccentric loading of the pole 11 and crossarm assembly 10 can be avoided.
  • the invention also provides a crossarm assembly which can be constructed entirely of electrically nonconductive and noncorrosive materials such that the path between the respective conductors and the pole can be made as long as possible.
  • the dowel pins which are used to secure the cross iece to the support legs of the crossarm assembly serve a dual unction in that such not only position the crosspiece endwise with respect to the support legs but also serve to absorb forces imposed normally on the crosspiece.
  • the dowel pins can be sized so as to permit the crosspiece and support legs to abut each other along substantial portions thereof or can be dimensioned to support the crosspiece in a slightly elevated position from the ends of the support legs.
  • a suitable caulking compound 29 can be packed into the spaces between the crosspiece and support legs in order to prevent any accumulation of water or other deposits therebetween which might produce a nondesirable electrical conductive condition.
  • a suitable adhesive 30, such as an epoxy can be used to strengthen the joint between the support legs and crosspiece.
  • crosspiece and support legs are shown in the drawings as being made of solid cross sections, any suitable cross-sectional shape can be used.
  • any suitable securing means can be used to secure a crosspiece to a pair of support legs.
  • a crossarm assembly comprising an arcuate crossarm of electrically nonconductive material and curvilinear shape
  • said means securing said support legs to said arcuate crossarm, said means including a dowel pin disposed in the end of each support leg and received within said crossarm for retaining said crossarm endwise relative to said support legs.
  • a crossarm assembly as set forth in claim 1 is disposed in a concave up position relative to said support legs.
  • each retaining bracket is of electrically nonconductive material.
  • a crossarm assembly comprising a cross arm
  • each dowel pin being received in one of said support legs and said cross arm to position said cross arm relative to said support legs, and

Landscapes

  • Suspension Of Electric Lines Or Cables (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Insulating Bodies (AREA)
US1175A 1970-01-07 1970-01-07 Crossarm assembly Expired - Lifetime US3603717A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US117570A 1970-01-07 1970-01-07

Publications (1)

Publication Number Publication Date
US3603717A true US3603717A (en) 1971-09-07

Family

ID=21694754

Family Applications (1)

Application Number Title Priority Date Filing Date
US1175A Expired - Lifetime US3603717A (en) 1970-01-07 1970-01-07 Crossarm assembly

Country Status (7)

Country Link
US (1) US3603717A (no)
JP (1) JPS511037B1 (no)
DE (1) DE2051638A1 (no)
FR (1) FR2072911A5 (no)
GB (1) GB1310001A (no)
NO (1) NO130849C (no)
ZA (1) ZA706965B (no)

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4615154A (en) * 1985-06-28 1986-10-07 Trus Joist Corporation Utility line transmission tower apparatus
US4682747A (en) * 1986-04-24 1987-07-28 King Jr Halm C Utility insulated cross-arm
US5505036A (en) * 1995-03-27 1996-04-09 Lewtex Technological Manufacturing, Inc. Utility pole beam with improved load transfer
US5605017A (en) * 1994-01-13 1997-02-25 Pupi Enterprises L.L.C. Pultruded utility line support structure and method
WO2002019493A1 (en) * 2000-08-28 2002-03-07 Conveytech S.R.L. Pole top support for aerial electric power lines
US6834469B2 (en) 2001-01-24 2004-12-28 Geotek, Inc. Utility line support member
US7007438B1 (en) * 2002-09-24 2006-03-07 Brooks Manufacturing Co. Crossarm systems and methods
US7363751B2 (en) 2005-09-06 2008-04-29 Shakespeare Composite Structures, Llc Wound-in tenon/wound-in tenon collar for attachment of luminaire
US20080271386A1 (en) * 2004-11-26 2008-11-06 Holland Railconsult B.V. High-Tension Tower, Power Transporting System, Power Transporting Method and Assembling Method
US7490964B2 (en) 2002-10-09 2009-02-17 Genlyte Thomas Group Llc Modular pole system for a light fixture
US8061666B1 (en) 2008-08-05 2011-11-22 Philips Electronics Ltd Adapter assembly for pole luminaire
US20120048613A1 (en) * 2010-08-31 2012-03-01 Grant Robert Lockhart Transmission cross arm
US20120205502A1 (en) * 2011-02-11 2012-08-16 Oliphant Wesley J Support apparatus for supporting utility cables and utility transmission line including same
US8952251B2 (en) * 2012-04-27 2015-02-10 AEP Transmission Holding Company, LLC High-capacity/efficiency transmission line design
WO2015103702A1 (en) * 2014-01-08 2015-07-16 K-Line Insulators Limited Insulated power line framings
US20150295392A1 (en) * 2012-10-25 2015-10-15 Jiangsu Shenma Electric Co., Ltd. Composite Tower for Power Transmission Lines of Power Grid and Composite Cross Arm Structure Thereof
USD853595S1 (en) 2018-01-24 2019-07-09 Bold Transmission, Llc Electric power transmission line support tower
USD853590S1 (en) 2018-01-24 2019-07-09 Bold Transmission, Llc Electric power transmission line support tower
USD853594S1 (en) 2018-01-24 2019-07-09 Bold Transmission, Llc Electric power transmission line support tower with insulator assembly
USD853592S1 (en) 2018-01-24 2019-07-09 Bold Transmission, Llc Electric power transmission line support tower with insulator assembly
USD853598S1 (en) 2018-01-24 2019-07-09 Bold Transmission, Llc Electric power transmission line support tower
USD853591S1 (en) 2018-01-24 2019-07-09 Bold Transmission, Llc Electric power transmission line support tower
USD853600S1 (en) 2018-01-24 2019-07-09 Bold Transmission, Llc Electric power transmission line support tower with insulator assembly
USD853596S1 (en) 2018-01-24 2019-07-09 Bold Transmission, Llc Electric power transmission line support tower with insulator assembly
USD853599S1 (en) 2018-01-24 2019-07-09 Bold Transmission, Llc Electric power transmission line support tower
USD853597S1 (en) 2018-01-24 2019-07-09 Bold Transmission, Llc Electric power transmission line support tower with insulator assembly
USD853593S1 (en) 2018-01-24 2019-07-09 Bold Transmission, Llc Electric power transmission line support tower

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US462315A (en) * 1891-11-03 Electric-wire-support bracket
US958276A (en) * 1909-12-06 1910-05-17 Warren Pence Joint.
AT167336B (de) * 1949-07-13 1950-12-11 Josef Ing Schaffenberger Portalmast für Freileitungen
DE1007402B (de) * 1954-10-11 1957-05-02 Rosenthal Isolatoren Gmbh Auf Quertraversen von Masten befestigte rollenfoermige Isolatoren mit durchgehender Bohrung
GB873354A (en) * 1956-11-09 1961-07-26 Yves Bernard Rondot Towers for supporting overhead electric conductors
FR1509484A (fr) * 1966-01-27 1968-01-12 Pric Patent Res International Poteau ou pylône ajouré en treillis ou similaire pour lignes électriques en fils aériens
FR1563904A (no) * 1968-02-16 1969-04-18
US3499973A (en) * 1968-07-11 1970-03-10 Lexalite Corp Support bracket for standoff insulators and the like

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US462315A (en) * 1891-11-03 Electric-wire-support bracket
US958276A (en) * 1909-12-06 1910-05-17 Warren Pence Joint.
AT167336B (de) * 1949-07-13 1950-12-11 Josef Ing Schaffenberger Portalmast für Freileitungen
DE1007402B (de) * 1954-10-11 1957-05-02 Rosenthal Isolatoren Gmbh Auf Quertraversen von Masten befestigte rollenfoermige Isolatoren mit durchgehender Bohrung
GB873354A (en) * 1956-11-09 1961-07-26 Yves Bernard Rondot Towers for supporting overhead electric conductors
FR1509484A (fr) * 1966-01-27 1968-01-12 Pric Patent Res International Poteau ou pylône ajouré en treillis ou similaire pour lignes électriques en fils aériens
FR1563904A (no) * 1968-02-16 1969-04-18
US3499973A (en) * 1968-07-11 1970-03-10 Lexalite Corp Support bracket for standoff insulators and the like

Cited By (40)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4615154A (en) * 1985-06-28 1986-10-07 Trus Joist Corporation Utility line transmission tower apparatus
US4682747A (en) * 1986-04-24 1987-07-28 King Jr Halm C Utility insulated cross-arm
WO1989001108A1 (en) * 1986-04-24 1989-02-09 Halm Chris King Utility insulated cross-arm
US5605017A (en) * 1994-01-13 1997-02-25 Pupi Enterprises L.L.C. Pultruded utility line support structure and method
US5505036A (en) * 1995-03-27 1996-04-09 Lewtex Technological Manufacturing, Inc. Utility pole beam with improved load transfer
CN100353627C (zh) * 2000-08-28 2007-12-05 运送技术股份公司 空中电力线的顶端支杆
US7530539B2 (en) * 2000-08-28 2009-05-12 Conveytech S.R.L. Pole top support for aerial electric power lines
AP1472A (en) * 2000-08-28 2005-09-29 Conveytech S P A Pole top support for aerial electric power lines
US20040113026A1 (en) * 2000-08-28 2004-06-17 Mario Boschetti Pole top support for aerial eletric power lines
WO2002019493A1 (en) * 2000-08-28 2002-03-07 Conveytech S.R.L. Pole top support for aerial electric power lines
KR100976891B1 (ko) 2000-08-28 2010-08-18 컨베이텍 에스.피.에이 공중 전력선용 전주 상단 지지체
US6834469B2 (en) 2001-01-24 2004-12-28 Geotek, Inc. Utility line support member
US7007438B1 (en) * 2002-09-24 2006-03-07 Brooks Manufacturing Co. Crossarm systems and methods
US7490964B2 (en) 2002-10-09 2009-02-17 Genlyte Thomas Group Llc Modular pole system for a light fixture
US20080271386A1 (en) * 2004-11-26 2008-11-06 Holland Railconsult B.V. High-Tension Tower, Power Transporting System, Power Transporting Method and Assembling Method
US7363751B2 (en) 2005-09-06 2008-04-29 Shakespeare Composite Structures, Llc Wound-in tenon/wound-in tenon collar for attachment of luminaire
US8061666B1 (en) 2008-08-05 2011-11-22 Philips Electronics Ltd Adapter assembly for pole luminaire
US20120048613A1 (en) * 2010-08-31 2012-03-01 Grant Robert Lockhart Transmission cross arm
US8652629B2 (en) * 2010-08-31 2014-02-18 Frp Transmission Innovations Inc. Transmission cross arm
US20120205502A1 (en) * 2011-02-11 2012-08-16 Oliphant Wesley J Support apparatus for supporting utility cables and utility transmission line including same
US9016022B2 (en) * 2011-02-11 2015-04-28 Trinity Industries Inc. Support apparatus for supporting utility cables and utility transmission line including same
US8952251B2 (en) * 2012-04-27 2015-02-10 AEP Transmission Holding Company, LLC High-capacity/efficiency transmission line design
US9768601B2 (en) 2012-04-27 2017-09-19 Bold Transmission, Llc High-capacity/efficiency transmission line design
US20150295392A1 (en) * 2012-10-25 2015-10-15 Jiangsu Shenma Electric Co., Ltd. Composite Tower for Power Transmission Lines of Power Grid and Composite Cross Arm Structure Thereof
US9698585B2 (en) * 2012-10-25 2017-07-04 Jiangsu Shenma Electric Co., Ltd. Composite tower for power transmission lines of power grid and composite cross arm structure thereof
WO2015103702A1 (en) * 2014-01-08 2015-07-16 K-Line Insulators Limited Insulated power line framings
US20160336727A1 (en) * 2014-01-08 2016-11-17 K-Line Insulators Limited Insulated power line framings
US9685772B2 (en) * 2014-01-08 2017-06-20 K-Line Insulators Limited Insulated power line framings
EP3092694A4 (en) * 2014-01-08 2017-09-27 K-line Insulators Limited Insulated power line framings
USD853590S1 (en) 2018-01-24 2019-07-09 Bold Transmission, Llc Electric power transmission line support tower
USD853595S1 (en) 2018-01-24 2019-07-09 Bold Transmission, Llc Electric power transmission line support tower
USD853594S1 (en) 2018-01-24 2019-07-09 Bold Transmission, Llc Electric power transmission line support tower with insulator assembly
USD853592S1 (en) 2018-01-24 2019-07-09 Bold Transmission, Llc Electric power transmission line support tower with insulator assembly
USD853598S1 (en) 2018-01-24 2019-07-09 Bold Transmission, Llc Electric power transmission line support tower
USD853591S1 (en) 2018-01-24 2019-07-09 Bold Transmission, Llc Electric power transmission line support tower
USD853600S1 (en) 2018-01-24 2019-07-09 Bold Transmission, Llc Electric power transmission line support tower with insulator assembly
USD853596S1 (en) 2018-01-24 2019-07-09 Bold Transmission, Llc Electric power transmission line support tower with insulator assembly
USD853599S1 (en) 2018-01-24 2019-07-09 Bold Transmission, Llc Electric power transmission line support tower
USD853597S1 (en) 2018-01-24 2019-07-09 Bold Transmission, Llc Electric power transmission line support tower with insulator assembly
USD853593S1 (en) 2018-01-24 2019-07-09 Bold Transmission, Llc Electric power transmission line support tower

Also Published As

Publication number Publication date
ZA706965B (en) 1971-07-28
DE2051638A1 (de) 1971-08-12
JPS511037B1 (no) 1976-01-13
NO130849C (no) 1975-02-19
NO130849B (no) 1974-11-11
GB1310001A (en) 1973-03-14
FR2072911A5 (no) 1971-09-24

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