Electricity: transmission to vehicles – Conductors – Trolley
Patent
1975-12-30
1977-06-14
Kunin, Stephen G.
Electricity: transmission to vehicles
Conductors
Trolley
B60M 118
Patent
active
040291820
ABSTRACT:
In a neutral section of an overhead electric traction system the contact wire and at least one catenary wire of one of two adjacent sections of the overhead electric traction system are secured to one end of an elongate insulated runner and the contact wire and at least one catenary wire of the other sections are secured to the other end of said elongate insulated runner or to one end of a second elongate insulated runner. At least one metallic member is positioned between and is spaced from the ends of said insulated runner, or separates and is connected to the other ends of said insulated runners, the undersurfaces of the contact wires, said insulated runner or runners and the elongate metallic member lying in a substantially common plane. At each of a plurality of spaced positions along the length of the neutral section, apparatus is provided for suspending the neutral section form a supporting structure, each of at least some of said suspension apparatus being of such a form as to resist any torsional load to which the insulated runner or runners may be subjected and at least said suspension apparatus at each end of the neutural section being so resiliently loaded as to assist in lifting of the neutral section to a height similar to that of the adjacent contact wires as a current collector runs through. the neutral section is especially suitable for installation under a bridge or in a tunnel.
REFERENCES:
patent: 1357215 (1920-11-01), Boggs
patent: 1705689 (1929-03-01), Swars
patent: 1886463 (1932-11-01), Birch
patent: 3829630 (1974-08-01), Belyaev
Bicc Limited
Kunin Stephen G.
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