US3774269A - Electric wire suspension clip - Google Patents

Electric wire suspension clip Download PDF

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Publication number
US3774269A
US3774269A US00162500A US3774269DA US3774269A US 3774269 A US3774269 A US 3774269A US 00162500 A US00162500 A US 00162500A US 3774269D A US3774269D A US 3774269DA US 3774269 A US3774269 A US 3774269A
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US
United States
Prior art keywords
clamping plates
pair
limbs
clip
aligned apertures
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
US00162500A
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English (en)
Inventor
H Campbell
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.)
Balfour Beatty PLC
Original Assignee
BICC 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 BICC PLC filed Critical BICC PLC
Application granted granted Critical
Publication of US3774269A publication Critical patent/US3774269A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
    • B60M1/00—Power supply lines for contact with collector on vehicle
    • B60M1/12—Trolley lines; Accessories therefor
    • B60M1/20—Arrangements for supporting or suspending trolley wires, e.g. from buildings
    • B60M1/24—Clamps; Splicers; Anchor tips
    • 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
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L3/00—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets
    • F16L3/08—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets substantially surrounding the pipe, cable or protective tubing
    • F16L3/12—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets substantially surrounding the pipe, cable or protective tubing comprising a member substantially surrounding the pipe, cable or protective tubing

Definitions

  • a clip suitable for use in supporting an overhead contact wire of an electric traction system is made from a hard, resilient plastics material and comprises a pair of [30] Forelgn Apphcatlon Pnonty Data clamping plates having aligned apertures to receive a July 15, 1970 Great Britain 34339/70 locking member. The clamping plates are shaped to provide co-operating clamping jaws on one side of the 52 US. Cl. 24/250 aligned apertures and to Provide mutual abutmems at 51 Int.
  • This invention relates to clips which are suitable, inter alia, for use in supporting the overhead contact wires of electric railways or other electric traction systems from catenary wires or other supports.
  • the contact wire is supported by droppers (or hangers) connected by contact wire clips to the contact wire and by catenary clips to a catenary wire or to an auxilliary catenary wire which is itself supported by a main catenary wire.
  • Clips in accordance with the present invention are suitablefor use either as contact wire clips or as catenary clips; they can also be used to support a contact wire of a trolley system directly from fixed, but preferably resilient, supports, and for other purposes.
  • clip that can be used for the purposes referred to is described in the Complete Specification of United Kingdom Patent No. 783,796 and comprises a pair of clamping plates and a shaped locking bar which passes through aligned apertures in the two clamping plates and is rotatable between a locking position in which it urges the clamping plates towards one another and a free position in which the clamping plates can be opened sufficiently to allow the release of the gripped member.
  • the components are of metal, in practice always copper or a highconductivity copper alloy (in order to avoid electrolytic corrosion) and it is an object of the present invention to provide a clip of the same general type which can be made of a less expensive material.
  • the clip in accordance with the present invention is made of a hard, resilient plastics material and comprises a pair of clamping plates having aligned apertures to receive a locking member, the clamping plates being shaped to provide co-operating clamping jaws on one side of the said aligned apertures and to provide mutual abutments at least on the opposite side of the said aligned apertures, and a locking member passing through the said aligned apertures and having a first pair of limbs engageable with the clamping jaws to urge them towards one another and a second pair of limbs simultaneously engageable with outer faces of the clamping plates in the vicinity of their mutual abutments.
  • the locking member is moveable to a release position and may also if desired be moveable to a third position in which the first pair of limbs is disengaged but the second pair is engaged, such a third position producing a light grip allowing easy adjustment.
  • the mutual abutments between the clamping plates are preferably surface abutments, which may extend over the whole area of the clamping plates on the said one side of the aligned apertures.
  • the clamping movement of the jaws may be obtained by flexing of the clamping plates or by relative rocking movement.
  • the clamping plates are connected together, and if so the connecting means must allow the necessary relative movement of the jaws; since the clamping plates are resilient, it will often be sufficient to locate the connecting means at a sufficient distance from the jaws, and when this is done the third position of the locking member will not normally be required.
  • each clamping plate has a projecting stud which is a force fit in a corresponding aperture in the other clamping plate; if necessary the stud may have a head and a shank which is narrower than the head and moves freely in the aperture if increased movement of the jaws is needed.
  • Contiguous parts of one or both of the clamping plates and of the locking member are preferably so shaped that the locking member will enter its locking position with a snap action, and it may also be made to snap into the third position (if provided) in a similar way.
  • FIGS. 1 3 are end views of the clip in three different conditions and FIG. 4 is a cross-section on the line IV IV in FIG.
  • the clip comprises two identical clamping plates 1 and 2 and a locking member 3 all injection-moulded from the acetal copolymer sold under the Trade Mark Kematal, or alternatively from nylon or other hard resilient plastics material.
  • the plastics material may be filled with chopped glass fibres to increase its strength.
  • the clamping plates are fiat and of uniform thickness except that along one edge they are shaped to define spaced clamping jaws 4, 5 appropriate to the contact wire 6 or other article to be gripped.
  • the clamping plates are secured together by an integral stud 7, 8 on each of them which is force-fitted in a corresponding hole in the other (for clarity, stud 8 has been omitted from FIGS.
  • apertures 10 each comprising a round-ended slot 1 1 extending parallel to the jaws and an arcuate recess 12 in the side of the slot further from the jaws.
  • the apertures receive the locking member 3 which is an assymmetrical I-I-shape providing a first pair of limbs l3, 14 having a spacing slightly less than the nominal measurement across the widest part of the jaws in their closed position (FIG. 1) and a second pair of limbs 15, 16 having a spacing substantially equal to the combined thickness of the abutting flat parts of the clamping plates.
  • the outside corners of the limbs are charnfered to allow insertion of the locking member through the slot, and the face of the cross-piece 17 of the H between the limbs of the second pair is rounded to facilitate rotation from the release position shown in FIGS. 2 and 3 to the locking position shown in FIG.
  • the ribs 19, 20 are omitted so that the locking member can be moved to a third position in which the second pair of limbs engage the clamping plates adjacent the end of the slots 1 1 but the first pair of limbs are disengaged; in cases where the clamping plates are not connected together or are only loosely connected this position provides a partial grip which permits the clip to slide freely along the contact wire, but not to be readily detached from it.
  • the clamping plates have a uniform thickness (apart from the ribs 19, of 3mm and the diameter across the widest part of the jaws is 16mm.
  • the thickness of the locking member is 8mm, each limb has a width of about 10mm at its base, and the width of the cross-piece is about 10mm measured to the midpoint of its curved surface.
  • This size of clip is suitable for use with a shaped 100mm contact wire.
  • the clip in accordance with the invention is easier to operate than the clip of UK.
  • Patent Specification No. 783,796 in some cases it may be possible to operate the locking member by hand rather than with a spanner or equivalent tool. It is also less liable to corrosion and, because it avoids metal-to-metal contact, may allow the use of droppers and catenary wires of a metal other than copper.
  • a clip suitable for use in supporting an overhead contact wire of an electric traction system made from a hard, resilient plastics material and comprising a. two clamping plates each having opposed inner and outer faces, assembled in face-to-face relation with said inner faces contiguous with one another and having aligned apertures therein providing a through passage between the outer faces of said clamping plates, the clamping plates each being shaped to provide a respective one of a pair of cooperating clarnping jaws spaced in a first direction from said aligned apertures, said clamping plates touching one another at least at a place spaced from said aligned apertures in the direction opposite to said first direction, and
  • an integral locking member comprising a crosspiece passing through said aligned apertures and first and second pairs of limbs; the limbs of said first pair extending in the same direction from said cross-piece to engage respective outside faces of said clamping jaws thereby urging them towards one another; the limbs of said second pair extending from said cross-piece in the same direction as each other and the opposite direction to the limbs of the first pair to engage the respective outer faces of said clamping plates in the vicinity of said place where the clamping plates touch one another; each limb of said first pair being stiffly connected with a respective limb of said second pair, the limbs so connected lying on the same side of said clamping plates; and said locking member being rotatable about an axis extending longitudinally of said crosspiece to disengage the limbs of said first pair from said jaws said clamping plates are connected together by means permitting relative movement of the jaws.
  • a clip as claimed in claim 1 in which contiguous parts of one or both of the clamping plates and of the locking members are so shaped that the locking member will enter its locking position with a snap action.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Clamps And Clips (AREA)
  • Installation Of Indoor Wiring (AREA)
  • Supports For Pipes And Cables (AREA)
US00162500A 1970-07-15 1971-07-14 Electric wire suspension clip Expired - Lifetime US3774269A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3433970 1970-07-15

Publications (1)

Publication Number Publication Date
US3774269A true US3774269A (en) 1973-11-27

Family

ID=10364416

Family Applications (1)

Application Number Title Priority Date Filing Date
US00162500A Expired - Lifetime US3774269A (en) 1970-07-15 1971-07-14 Electric wire suspension clip

Country Status (3)

Country Link
US (1) US3774269A (enrdf_load_stackoverflow)
CA (1) CA934457A (enrdf_load_stackoverflow)
GB (1) GB1306237A (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5421068A (en) * 1993-09-13 1995-06-06 The Whitaker Corporation Fastener assembly
US6708942B2 (en) * 2001-05-08 2004-03-23 Lior Barkan Security buckle for harnessing display sets
CN102627076A (zh) * 2012-03-02 2012-08-08 四川龙腾铁路器材有限公司 一种刚性架空接触网系统用汇流排定位线夹及其制作方法
US20150151367A1 (en) * 2012-06-21 2015-06-04 Gustav Klauke Gmbh Cutting device
RU2729644C1 (ru) * 2019-06-05 2020-08-11 Роман Вячеславович Жуков Пиротехнический зажим

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110307752B (zh) * 2019-08-09 2024-07-26 梁伟基 一种水火箭发射用抱爪式发射器
MX2024006982A (es) * 2021-12-10 2024-08-06 Gripple Ltd Abrazadera para linea aerea.

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US193811A (en) * 1877-08-07 Improvement in suspender-clasps
US621208A (en) * 1899-03-14 Dress-shield holder
US2008195A (en) * 1934-07-10 1935-07-16 Ross M Mcfadden Curler
US2261089A (en) * 1940-05-17 1941-10-28 U S Clasp Corp Garment clasp
US2325394A (en) * 1942-06-13 1943-07-27 Hakki Ismail Electrode holder
US2979763A (en) * 1958-09-22 1961-04-18 Stabryla Leon Fish handling and scaling clamps
US3526935A (en) * 1968-01-29 1970-09-08 Elbo File Control Systems Inc Article-holding clip and method of producing same

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US193811A (en) * 1877-08-07 Improvement in suspender-clasps
US621208A (en) * 1899-03-14 Dress-shield holder
US2008195A (en) * 1934-07-10 1935-07-16 Ross M Mcfadden Curler
US2261089A (en) * 1940-05-17 1941-10-28 U S Clasp Corp Garment clasp
US2325394A (en) * 1942-06-13 1943-07-27 Hakki Ismail Electrode holder
US2979763A (en) * 1958-09-22 1961-04-18 Stabryla Leon Fish handling and scaling clamps
US3526935A (en) * 1968-01-29 1970-09-08 Elbo File Control Systems Inc Article-holding clip and method of producing same

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5421068A (en) * 1993-09-13 1995-06-06 The Whitaker Corporation Fastener assembly
US6708942B2 (en) * 2001-05-08 2004-03-23 Lior Barkan Security buckle for harnessing display sets
CN102627076A (zh) * 2012-03-02 2012-08-08 四川龙腾铁路器材有限公司 一种刚性架空接触网系统用汇流排定位线夹及其制作方法
US20150151367A1 (en) * 2012-06-21 2015-06-04 Gustav Klauke Gmbh Cutting device
US10279402B2 (en) * 2012-06-21 2019-05-07 Gustav Klauke Gmbh Cutting device
RU2729644C1 (ru) * 2019-06-05 2020-08-11 Роман Вячеславович Жуков Пиротехнический зажим

Also Published As

Publication number Publication date
CA934457A (en) 1973-09-25
GB1306237A (enrdf_load_stackoverflow) 1973-02-07

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