Receptacles – Outlet or junction box type
Patent
1986-10-03
1987-05-26
Pollard, Steven M.
Receptacles
Outlet or junction box type
220 33, 174 48, H02G 308
Patent
active
046678409
ABSTRACT:
An electrical junction box has an interior electrical component container having a forward opening, and a second rearwardly opening container portion which opens rearwardly and is filled with insulating material. The housing is a one-piece unit preferably molded from fire-resistant fiberglass. The junction box is manufactured by molding a one-piece fiberglass housing, filling the rearwardly opening chamber with a fluid insulating material such as calcinated gypsum, allowing the insulating material to harden, and drilling a hole from the exterior of the unit into the interior chamber to permit wiring or conduits to extend to the box.
REFERENCES:
patent: 2297862 (1942-10-01), Bachmann
patent: 2445244 (1948-07-01), Seaver
patent: 3620404 (1971-11-01), Grasso
patent: 4134636 (1979-01-01), Kleinatland et al.
patent: 4408695 (1983-10-01), Balkwill et al.
patent: 4580689 (1986-04-01), Slater
patent: 4616104 (1986-10-01), Lindsey
Pollard Steven M.
Quirk Edward J.
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