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US 4,187,934 AGranted
Section insulator for catenary systems
AssigneeHarvey Hubbell Incorporated
InventorJohn W. Senften
Life of this patent
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AssigneeHarvey Hubbell Incorporated
InventorJohn W. Senften
Estimating the term…
A section insulator for insulating adjacent sections of contact wire of overhead power supply systems for electrified railway lines and the like is disclosed. The section insulator is interposed between separated ends of adjacent sections of contact wire. Strain plates are secured to the opposed ends of the sections and a strain insulator is secured to the strain plates above the level of the contact wires to maintain the tension in the contact wires. Spaced runners supported by the strain insulator extend between the contact wires, there being air gaps between the ends of the contact wires and the runners. A pair of diverging glider arms is secured to each contact wire section adjacent its end. The glider arms extend toward each other beyond the ends of the contact wire sections and overlap the ends of the runners, there being transverse air gaps between the diverging glider arms and the runners. The system thus provides a smooth under run from one section of contact wire along the diverging glider arms to the runners, then to the other pair of diverging glider arms and to the other section of contact wire. The insulator is supported by members extending vertically from the strain plates to a messenger wire, bridle, or other appropriate support. The section insulators can be adapted to use in ordinary catenary systems, compound catenary systems, ordinary direct suspension trolley systems, and as phase breaks for alternating current systems.
A section insulator assembly for mounting between spaced aligned ends of two contact wires of an overhead power supply of an electrified transportation system, there being a supporting cable above said contact wires, said assembly comprising main strain insulator means extending between the ends of the two contact wires at a level above the level of the contact wires, rigid means secured to each contact wire and to the adjacent ends of the strain insulator means, the strain insulator means being secured at a level above the level of the contact wires to the rigid means thereby to maintain the tension in the contact wires, a runner supported by and disposed at a level lower than said strain insulator means, and means extending downwardly from said supporting cable adjacent each end of said strain insulator means for supporting said assembly, said supporting means comprising a rigid supporting member rigidly secured to each of said rigid means and fixed to said supporting cable, whereby said rigid supporting members support said assembly and resist the turning moment imposed on the rigid means by reason of the offset between the axes of the contact wire and the strain insulator means, a pair of glider arms mounted at the ends of the contact wires, the glider arms in each pair extending laterally outwardly from the adjacent contact wire and extending longitudinally to overlap the ends of said runner, there being lateral air gaps between said runner and said glider arms.
A section insulator assembly for mounting between spaced aligned ends of two contact wires of an overhead power assembly of an electrified transportation system, there being a supporting cable above said contact wires, said assembly comprising main strain insulator means extending between the ends of the two contact wires at a level above the level of the contact wires, a strain plate secured to the end of each contact wire and extending upwardly therefrom, the ends of said strain insulator means being secured to said strain plates, the strain insulator means being secured at a level above the level of the contact wires to the strain plates thereby to maintain the tension in the contact wires, a runner supported by and disposed at a level lower than said strain insulator means, and means extending downwardly from said supporting cable adjacent each end of said strain insulator means for supporting said assembly, said means for supporting said assembly comprising a rigid supporting member rigidly secured to each strain plate and fixed to said supporting cable, whereby said rigid members support said assembly and resist the turning moment imposed on the strain plates by reason of the offset between the axes of the contact wire and the strain insulator means, a pair of glider arms mounted at the ends of the contact wires, the glider arms in each pair extending laterally outwardly from the adjacent contact wire and extending longitudinally to overlap the ends of said runner, there being lateral air gaps between said runner and said glider arms.
Dependencies are inferred from the claim text.