Electricity: conductors and insulators – Underground – Distributing and/or combined with overhead
Patent
1976-05-06
1978-12-12
Askin, Laramie E.
Electricity: conductors and insulators
Underground
Distributing and/or combined with overhead
52102, 174 16R, 220 38, 220 18, 220366, 220371, 307 95, H02G 900, H02G 314, C23F 1300
Patent
active
041297431
ABSTRACT:
A terminal box used with underground electrical conductors is formed of opposed channels and a top cap with depending sidewalls. Air is permitted to flow to the interior of the housing via a filter beneath the cap, this filter being resistant to the passage of dust, water, blowing snow and insects. A weathertight seal is provided between the opposed channels by a resilient sealing strip and overlapping vertical marginal portions; and, upward access by animals and ground moisture to the interior of the housing is deterred by a continuous barrier sheet which extends transversely across the housing and is sealed thereto.
Corrosion damage to the housing is minimized by connecting it electrically to a buried plate formed of a metal which is anodic in the EMF series with respect to the housing metal. Grass fire and lawnmower-impact damage is reduced by surrounding the terminal box at ground level by a vegetation-inhibiting sheet.
Installation, servicing and modification are simplified, respectively, by providing a movable, detachable means for providing a conductor entry passage at the bottom of the housing interior; lining the channels with separate sheets of dielectric material; and, providing a replacement channel with enlarged side flanges to be substituted for one of the original channels to enlarge the size of the housing.
REFERENCES:
patent: 337539 (1886-03-01), Warner
patent: 2158868 (1939-05-01), Stacy
patent: 2645612 (1953-07-01), Taylor
patent: 3164668 (1965-01-01), Skubal
patent: 3391072 (1968-07-01), Pearson
patent: 3515373 (1970-06-01), Abbe
patent: 3650072 (1972-03-01), Matvey
patent: 3714369 (1973-01-01), Bunten
patent: 3740452 (1973-06-01), Bunten
patent: 3872234 (1975-03-01), Smith
Askin Laramie E.
Telephone Utility Terminal Co., Inc.
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