Lamps Using Other Systems
Here are some less common ways of balancing arms.
| Lamps having a vertical axis |
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| This kind of lamp has a forearm balanced by weight or springs. Its disadvantage is that the upper arm cannot point up or forwards. |
| Friction |
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The friction between the twisted arm controls the movement between the arms.
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| Mechanical coupling devices |
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| This lamp works by coupling together the upper arm and the forearm. It is called a gravity-locked or cam-locked elbow See here. |
| Hydraulic arm |
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| The Biggest pivoting arm lamp in the world is in Rotterdam. It has one hydraulic cylinder to control the forearm, and one hydraulic cylinder to control the upper arm. |
| Pneumatic arm |
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| Arm lamp with a pneumatic cylinder. The gravity compress the air in the pneumatic cylinder. |
Read more about this topic: Balanced-arm Lamp
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