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A balanced-arm lamp, sometimes called a floating arm lamp, is a lamp with an adjustable folding arm which is constructed such that the force due to gravity is always counteracted by springs, regardless of the position of the arms of the lamp.
The lamps have been made from a variety of materials over the years, evolving from the early full steel prototypes into later models made from brass and aluminium. [14] Although the lamp is still marketed as an iconic British design, production for all lamps, except the 1227 Giant model, has been moved to China. [15]
Movable lamps have a plug and cord that plugs into a wall socket. Light fixtures may also have other features, such as reflectors for directing the light, an aperture (with or without a lens), an outer shell or housing for lamp alignment and protection, an electrical ballast or power supply, and a shade to diffuse the light or direct it towards ...
In 1937, Jac Jacobsen, the founder of Luxo, invented the Luxo L-1 lamp (a modification of the earlier Anglepoise lamp). The lamp, a type of balanced-arm lamp was the inspiration for the 1986 animated short film, Luxo Jr., by Pixar Animation Studios. [3] The short subsequently became the subject of a lawsuit from Luxo. [4] [5]
Light fixture, or light fitting or luminaire, is an electrical device containing an electric lamp that provides illumination; Signal lamp, or Aldis lamp or Morse lamp, a semaphore system for optical communication; Safety lamp, any of several types of lamp that provides illumination in coal mines Davy lamp
U.S. patent 774,250.The first US power plug and socket dated 1904. Several early American electrical plug and socket arrangements were invented by Harvey Hubbell.On 26 February 1903 he filed two patent applications featuring 2-pin plugs and adaptors for using his plugs with existing designs of lamp sockets and wall receptacles.
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