Lamps Balanced With Two Counterweights
| A single arm with two counterweights |
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With this lamp the movement is very limited (the arm moves up and down only) but the technique is nice to look at. As the forearm becomes more horizontal the weight ceases to be balanced on both side of the base. The weight of the base is needed to avoid over-balancing. |
| Two arms with two counterweights |
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| A lamp type like the Tizio works like this. A balancing arm (the forearm) has on one side of an axis a small counterweight and on the other side a lamp cap. These parts are lifted by a second bigger balancing arm (the upper arm) that has on the other side of a second axis a heavier counterweight. The lamp designed by Edouard-Wilfrid Buquet in 1929 works in this way. The lamp is in the collection of the Museum of Modern Art. The two axes have a different angle, and this has some advantages. Lamp-cap x fore-Arm = Arm x Small weight (Lamp-cap + Small weight) x upper-arm = Arm x Big weight. |
Read more about this topic: Balanced-arm Lamp
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