Configuration and General Design
– Lamp cap
– Forearm
– Upper arm
– Stand
– Base
– Stand body
– Two connected arms
– Lamp head
– Balancing device
Lamps balanced with springs
– Compression and tension springs
– Springs located on forearm or upper arm
– Springs nearer to the base
– Tension springs and compression springs
– Springs with limited lifting capacity and extension length
Lamps balanced with tension springs
– Flexible forearm with spring-balanced upper arm
– Spring over two wheels
– Single spring controlling upper arm and forearm
– Two parallelograms and two tension spring sets
– Single forearm bar with one parallelogram and two tension spring sets
Lamps balanced with compression springs
– Compression springs in the arms
– Compression springs near the foot
– Compression spring with one parallelogram
Other balancing systems and In popular culture
– Rubber between two parallel arms
– Friction from twisting
– Friction between upper arm and forearm
– Lamps balanced with counterweight
– Lamps balanced with one counterweight
– Lamps balanced with two counterweights
– Lamps using other systems (vertical axis, mechanical coupling devices, hydraulic arm, pneumatic arm)
– Popular culture references (Pixar short film, Pixar logo, Myster Shadow-Sky’s musical instrument, book reference)
– Related topics (Wikimedia Commons, gooseneck lamp, industrial design, light fixture)
– Patents history (classifications IPC, international patent category, specific patents) Source: https://en.wikipedia.org/wiki/Balanced-arm_lamp
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. Many lamp brands (such as the Anglepoise, originator of the concept, and Luxo L-1), as well as other devices, use this principle.
