Electricity: conductors and insulators – Overhead – With connector or wire fanning arrangements
Patent
1997-05-05
1999-08-24
Kincaid, Kristine
Electricity: conductors and insulators
Overhead
With connector or wire fanning arrangements
200 49, H02G 720
Patent
active
059427230
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
This invention relates to overhead power line isolators.
BACKGROUND OF THE INVENTION
Canadian patent application Serial No. 2,092,741 filed on Mar. 26, 1993 discloses an isolating switch for an overhead power line, which isolating switch has main sub-assembly formed of two parallel spaced insulators joined at their ends by aluminum end pieces. The end pieces each have a slot aligned with the space between the two insulators such that the sub-assembly may be hung on a hot power line with the line passing along the slots and the space between the insulators. An integral rod projecting from each end piece in alignment with but below the slot may then be clamped to the line by wedges and C-shaped clamps after which the line may be severed at a location between the end pieces to isolate the line.
To retain the sub-assembly on the line prior to attachment of the rods to the line a keeper bar is provided on each end piece. The keeper bars are pivotally mounted on one side of the slot and may be swung across the slot when the sub-assembly is in place on the line to engage respectively two studs on the other side of the slot. Nuts may then be applied to the studs to secure the keeper bars in place which in turn retain the sub-assembly on the line.
It is a feature of the present invention to provide an improved mounting mechanism.
SUMMARY OF THE INVENTION
Accordingly the present invention provides in a broad form an isolating switch for an electric power line comprising a sub-assembly made up of two electrically conductive end pieces interconnected by at least one insulator, the end pieces having respective aligned grooves for registry with the electric power line, and means for permanently securing the end pieces to the electric power line, the sub-assembly being provided with means for mounting the sub-assembly to the power line prior to permanently securing the end pieces to the power line, wherein the means for mounting comprises two keeper bars, each being pivotally mounted on a respective one of the end pieces and being pivotable manually between a first position in which the keeper bar is completely clear of the groove and a second position in which the keeper bar extends across the groove to retain the sub-assembly on the power line, detent means being provided on each end piece for cooperation with the respective keeper bar, and spring means urging the keeper bar and detent means into mutual engagement when the keeper bar is in the second position to retain the keeper bar in the second position.
More particularly, in a preferred embodiment the detent means comprises aligned detent grooves formed on a pair of raised bosses, one on either side of the groove which receives the line. When the keeper bar is in the second position it is received snugly in the aligned detent grooves and when the keeper bar is in the first position it is received in only one of the grooves and extends 180.degree. from the second position.
Although the invention is particularly applicable to the power line isolator of Canadian patent application Serial No. 2,092,741, it should be apparent that the invention can also be used with other types of power line isolators in which a portion of the isolator is hung on the power line prior to attachment of the ends of the isolator to the power line.
An isolating switch for an electric power line comprising a sub-assembly made up of two electrically conductive end pieces interconnected by at least one insulator, the end pieces having respective aligned grooves for registry with the electric power line, and securing members for permanently securing the end pieces to the power line, the sub-assembly being provided with two keeper bars for mounting the sub-assembly to the power line prior to permanently securing the end pieces to the power line, each of the keeper bars being pivotally mounted on a respective one of the end pieces and being pivotable manually between a first position in which the keeper bar is completely clear of the groove and a second position in wh
REFERENCES:
patent: 2147141 (1939-02-01), Blancha
patent: 2953655 (1960-09-01), Warner, Jr. et al.
patent: 3248510 (1966-04-01), McCloud
patent: 3361880 (1968-01-01), Symes
patent: 4014504 (1977-03-01), Sachs
patent: 5789700 (1998-08-01), Young et al.
Kincaid Kristine
Patel Dhiru R.
The Whitaker Corporation
VanAtten Mary K.
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