Adjustable counterbalanced arm assembly for an electric lamp

Illumination – Supports – Adjustable light support


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267155, 362395, 362396, 362399, 362401, 362410, 362419, 362430, F21M 318, F21S 112, F16F 106




An equipoised lamp is provided which comprises a lamp head mounted on an adjustable arm assembly which is counter-balanced by internal coaxial torsion springs mounted within the adjacent end sections of the arms. The end sections are bent at, so that the arms may be set to desired angular positions about respective mutually perpendicular axes. The arms may be mounted on an upright base so that the assembly constitutes a floor lamp, or they can be clamped to a table, to provide a draftsman's lamp assembly, and the like. The lamp head itself is mounted at an intermediate position on one of the arms, so that the end of that arm may form a handle for manually adjusting the lamp head to any desired position without any need to touch the hot lamp.

patent: 297269 (1984-04-01), Klein
patent: 1076175 (1913-10-01), Antwerp
patent: 1299899 (1919-04-01), Bessey et al.
patent: 1591791 (1926-07-01), Sprout
patent: 1708047 (1929-04-01), Bosworth
patent: 1865179 (1932-06-01), Egli
patent: 2052793 (1936-09-01), Peirce
patent: 2098016 (1937-11-01), Schuetz
patent: 2163070 (1939-06-01), Stringer
patent: 2297781 (1942-10-01), Korengold
patent: 2458967 (1949-01-01), Wiedenhoeft
patent: 2481037 (1949-09-01), Pringle
patent: 2653219 (1953-09-01), Popp
patent: 3291977 (1966-12-01), Nafe
patent: 3983386 (1976-09-01), Schallenkammer
patent: 4233655 (1980-11-01), Zelina, Jr. et al.


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