Receptacles – Outlet or junction box type
Patent
1976-03-12
1978-01-31
Frazier, Roy D.
Receptacles
Outlet or junction box type
85 33, 174 54, 220 36, H02G 308
Patent
active
040711587
ABSTRACT:
Screw fastening devices are described for use on structures such as electrical outlet boxes. According to the invention, a screw fastening device includes a support adapted to be mounted on said structure and defining two convergent opposed wall surfaces. A pair of screw-engaging members are arranged in sliding contact with the respective convergent wall surfaces. Spring means bias the members in the direction of convergence of said wall surfaces so as to normally maintain adjacent portions of said members in cooperating relationship, said adjacent portions being formed with recesses having internal grooves which together define a thread complimentary to that of said screw. In use, the screw can be inserted between said members, causing alternate relative movement of the members along said wall surfaces in directions against the biassing effect of the spring means and back to their normal positions under the action of said spring means as the thread on the screw rides over the corresponding thread defined by said recesses, the screw being held in its inserted position by said members and the thread defined by said recesses allowing the screw to be axially displaced by rotation in the appropriate direction.
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Frazier Roy D.
Holko Thomas J.
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