Supports – Pipe or cable – Brackets
Patent
1979-12-31
1982-03-23
Staab, Lawrence J.
Supports
Pipe or cable
Brackets
248 72, 339265R, F16L 324, H01R 446
Patent
active
043208827
ABSTRACT:
A clamp for grounding and clamping a conduit to a support member, such as a cable tray, and comprising a relatively thin pad member interposed between the conduit and the support member. The pad member includes serrations, knurling and/or other surface discontinuities, but is otherwise configured to mate with the conduit and the support member so that when pressure is applied between the mating surfaces a good electrical contact is achieved. The required pressure is provided, for example, by a jaw member and a U-bolt working in combination with the other members such that the jaw contacts the support member opposite at least a portion of the pad in contact with the support member. The ends of the U-bolt pass through the pad and the jaw member so that nuts installed on the ends of the U-bolt cause the conduit to be pressed into the pad. The jaw and the pad securely clamp the support member. The jaw may include arcuate slots and/or a plurality of holes so that its angular relationship, with respect to the pad, may be varied in order to accommodate clamping the conduit at a variety of angles with respect to the support member. The U-bolt may be replaced by a saddle member and a pair of bolts, in which case the threaded ends could be made to point in either direction. The resistance between the conduit and support member is minimized because of the characteristics and proportions of the pad member.
REFERENCES:
patent: 1090190 (1914-03-01), Bell
patent: 1319652 (1919-10-01), Korns
patent: 1797214 (1931-03-01), Mayer et al.
patent: 1877781 (1932-09-01), Akerlund
patent: 1887193 (1932-11-01), Buchanan
patent: 2029149 (1936-01-01), Barnes
patent: 2376041 (1945-05-01), Ellerthorpe
patent: 3228639 (1966-01-01), Korns
patent: 3604676 (1971-09-01), Weber
patent: 3667711 (1972-06-01), Kissel
patent: 3698798 (1972-10-01), Bolton
patent: 4195806 (1980-04-01), Berry
General Signal Corporation
Killian George W.
Staab Lawrence J.
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