Pull-down lamp

Claim 1

An electrical fixture movably suspended from a fiXed overhead supporting structure such as a ceiling, said fixture comprising a central hollow, dish-like housing adapted to be mounted on and supported solely by an overhead supporting structure and having a side facing generally downwardly away from the supporting structure, said housing having in said side a centrally located first aperture and second and third apertures spaced laterally from said first aperture, sheave means inside said housing supported for rotation in a vertical plane between and aligned with said central aperture and one of said laterally spaced apertures, and tangent to vertical axes through said central aperture and said one of said laterally spaced apertures, a flexible cable extending from and into said housing through said central aperture and through said one of said laterally spaced apertures, said cable within said housing passing onto and off of said sheave means at the points of tangency with said vertical axes of said apertures and having running and supporting engagement with said sheave means, an electrical unit attached to that portion of said cable extending through said central aperture, a counterweight attached to that portion of said cable extending through said one of said laterally spaced apertures, said counterweight comprising a hollow vessel having an open end and a cap for closing said open end whereby material may be added and removed from said vessel to adjust the weight of said counterweight, a helically coiled, resiliently extensible and contractible electrically conducting cord adapted to supply power to said electrical fixture from a source available on the supporting structure, said cord having one end electrically and mechanically connected to said electrical unit and having its other end extending into and mechanically connected to said housing through the other of said laterally spaced apertures, said cord helically coiling about the length of said flexible cable extending between said housing and said electrical unit and resiliently extending and contracting as said length of said cable changes.