Catenary grounding device fall restriction apparatus and method of use

{
  "publication_number": "US10763599B2",
  "country": "US",
  "kind": "B2",
  "title": "Catenary grounding device fall restriction apparatus and method of use",
  "abstract": "An apparatus for restricting a contact head of a catenary grounding device unintentionally falling from a catenary in use that is connectable to the contact head. The apparatus forming part of a contact head of a catenary grounding device for restricting the contact head unintentionally falling from a catenary in use.",
  "claims": [
    "1. A catenary grounding device operable for connecting the catenary in an electrical wire to an electrical ground, the catenary grounding device comprising: a non-conducting pole; a contact head including: a conducting contact portion shaped as an arch extending longitudinally along an arch axis and operable for contacting the electrical wire when captured in the catenary grounding device, the contact portion also partially defining a downwardly open arch mouth; a mounting section secured to a rearward arch leg of the contact portion; and a grounding wire connected to the contact portion and operable for conducting electricity from the electrical wire via the contact head to the ground; an apparatus connected to the contact head for restricting the contact head unintentionally falling from the electrical wire when in use, the apparatus comprising: a planar first arm is shaped as an inverted U and includes a first upper section, a coupling portion, and a pivot connection, the first upper section is shaped as a first hook and partially defines a downwardly open first mouth, the first upper section including a first rearward leg and an upward first apex and a first forward leg with a first free end at a first distance below the first apex, and the coupling portion extends rearwardly from the first rearward leg and is connected to the contact head such that the contact portion of the contact head and the first upper section of the first arm are fixed in planer parallel with the arch mouth and first mouth in axial alignment, and the pivot connection is a rotatable pivot joint located at a lower end of the first rearward leg and defines a pivot axis extending rearward and forward and perpendicular to the arch axis; a planar second arm is shaped as a rearward facing C and includes a second upper section, a lower section, and a forward section between the second upper and lower sections, the second upper section including a second upward apex and a second rearward leg with a second free end at a second distance below the second apex with the second distance less than the first distance, and the second arm partially defines a rearwardly open second mouth, and, at a rearward end of the lower section, the second arm is pivotably mounted to the pivot joint of the first arm and is movable between a closed position and an open position; and wherein the closed position the first arm and second arm are in planar parallel contact with the first mouth alongside the lower section of the second arm and with the rearward leg of the first arm alongside the second mouth to together partially define a completely circumscribed passage axially parallel to the arch axis; and wherein the open position the second upper section of the second arm is pivoted around the pivot axis and spaced apart from the upper section of the first arm to partially define a gap between the first arm and the second arm, the gap opening upward and narrowing downward and extending in parallel with the pivot axis.",
    "2. A catenary grounding device according to claim 1 and further including: a first flange extending upward and leftward from the first upper section of the first arm; a second flange extending upward and rightward from the second upper section of the second arm; and whereby the second arm can be moved to the open position by pressing a crotch partially defined between the first flange and the second flange against the electrical wire to be captured in the passage.",
    "3. A catenary grounding device according to claim 1 wherein: the mounting section of the contact head partially defines a vertical bore including an interior female thread and a downward opening; the coupling portion of the first arm partially defines a through hole with a vertical axis perpendicular to the pivot axis; and a fastener including a male threaded portion is installed upward through the through hole into and threadably engaging the bore of the mounting section.",
    "4. A catenary grounding device according to claim 3 wherein: the fastener includes: a first section defining an external first diameter and including the male threaded portion; a second section defining an external second diameter larger than the first diameter, connected to the first section at a first axial end of the second section, and partially defining a cylindrical bore with an opening at a second axial end distal from the first section, and including a female thread inside the bore; an annular land located at the first axial end of the second section and extending radially between the first diameter of the first section and the second diameter of the second section; and the through hole of the coupling portion of the first arm defines an internal third diameter greater than the external first diameter and less than the external second diameter.",
    "5. A catenary grounding device according to claim 4 wherein the non-conducting pole includes a threaded section, and the threaded section is threaded into the cylindrical bore of the fastener.",
    "6. A catenary grounding device according to claim 1, and further including a spring to bias the second arm into the closed position.",
    "7. A catenary grounding device according to claim 6, and wherein the spring is an elastic material elastically deformable from the closed position to the open position.",
    "8. A catenary grounding device according to claim 6, and wherein the spring is a coil spring.",
    "9. A catenary grounding device according to claim 8, and wherein the coil spring is a torsion spring located around the pivot axis with a first axial end of the coil spring anchored to the first arm and a second axial end of the coil spring anchored to the second arm."
  ],
  "description_excerpt": "This specification relates to apparatus for restricting a contact head of a catenary grounding device unintentionally falling from a catenary in use, a contact head provided with such apparatus and method of use thereof.\n\nEP0810691B1 teaches a contact head for short circuiting a catenary that supplies electrical current to trains. During maintenance of such a catenary it is important to short circuit the catenary by electrically coupling it to ground. This is illustrated in FIG. 1 in which a contact head 10 hangs from a catenary 12 and electrically couples it to rail tracks 14 in contact with the ground via a wire arrangement 16. The pole 18 is used to lift the contact head 10 up into contact with the catenary 12. A close up of the contact head 10 hanging from the catenary 12 is illustrated in FIG. 2, wherein electrically conductive components of the contact head 10 electrically couple the catenary 12 to the wire arrangement 16. In high current situations electromagnetic forces gendered by current flow can force the contact head 10 out of hanging engagement with the catenary 12 causing it to fall. Other occurrences can cause the contact head 10 to fall from the catenary 12 such as wind. It is desired to restrict the contact head 10 from unintentionally falling in use in order to reduce risk of injury.",
  "cpc": [
    "H01R 4/66",
    "B60M 1/02",
    "H01R 11/14",
    "H01R 43/00",
    "H02G 1/02",
    "H02G 7/22"
  ],
  "ipc": [
    "H01R 4/66",
    "H01R 43/00",
    "H02G 1/02",
    "H02G 7/22",
    "B60M 1/02"
  ],
  "assignees": [
    "Dubuis et Cie SAS"
  ],
  "inventors": [
    "Guillaume GENDRE"
  ],
  "filing_date": "2019-04-04",
  "publication_date": "2020-09-01",
  "grant_date": "2020-09-01",
  "priority_date": "2018-04-05",
  "application_number": "US-201916375414-A",
  "family_id": "62002097",
  "cited_by_count": 1,
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}