NExt you can see a Lamps balanced with one counterweight having a pivoting arm
a system that gives the most arm-lenght to total-weight ratio.
This system can balance the most lampshade-weight to arm-lenght ratio.
And it also gives the most mechanical and physics degrees of freedom in a three dimensional area.
With this design you less stress on the material.
The design and material are easely to craft in workshops al over the world.
Design. A few selfmade parts and a good construction could bring some descent light in a few houses around the world and also make a pleasant difference in people’s life being affordable at the same time.
As a matter of fact I do enjoy it myself living in a part of the world where lamps are as many as the stars we live under 
Please follow the links on the posts where you can spot a few diferent styles.
technical explanation:
This construction relates to a lamp comprising a standard, a parallelogram construction formed by bars, which is hinged on the standard, and a lampshade or another object hinged on this, in which the parallelogram construction comprises two at any rate virtually parallel long and two at any rate virtually parallel short bars, in which a first long bar is hinged on the standard and the other second long bar extends past the parallelogram construction and is connected to the protruding part by a device for keeping the parallelogram construction in a virtually stable position, which device connects the protruding part of the second long bar to the standard, and in which one of the short bars also extends past the parallelogram construction and is connected to the lampshade by the protruding part via a hinge construction. This lamp construction has a folding arm formed by the parallelogram construction, so that the lampshade can be turned to a desired position.
Such a lamp is known from British patent application GB 1 290 891 .
However, in this known lamp the parallelogram construction has to be turned 180 degrees around the vertical axis to illuminate the other side and cannot fold from left to right in a vertical plane. This can be a disadvantage if the space for turning around a vertical axis is not available.
In this the device for keeping the parallelogram construction in a stable position is formed by a spring connected to the standard, which is connected by an end to the protruding part of the second long bar. The disadvantage of this known lamp is that the protruding part of the second long bar bumps against the spring housing when fully extended, so that if the parallelogram construction is turned further the lamp could fall over and the user’s fingers could get trapped between this housing and the protruding part of the second bar.
Summary of the system
An objective of the invention is to provide a lamp of the sort described in the preamble, in which the chance of accidents is less than with the known lamp. For this purpose, the lamp according to the invention is characterised in that the device for keeping the parallelogram construction in a virtually stable position comprises a weight that can be pushed along and turned around the standard and which is connected via a rod or cord to the protruding part of the second long bar. A cord is here defined as any flexible, stretchable connecting element, such as for example a cable, string or chain, etc. The movement of the protruding part of the second bar is here not limited by a stop so that the above disadvantages of the known lamp cannot occur in the lamp according to the invention. This makes the lamp according to the invention safer to use than the known lamp.
Note that a lamp is known from GB-A-433.617 in which the movement of the protruding part of one of the long bars is also not limited. However, in this the long bar hinged on the standard is provided with a protruding part, which is connected to the device, so that the other long bar must also be connected to the device to keep the lamp in a stable position. In this known lamp this device is formed by helical springs, which can trap the user’s skin or hair, so that this lamp is also less safe to use than the lamp according to the invention.
Preferably the device is connected to the standard at a distance from the hinge point of the parallelogram construction. Moreover the parallelogram construction is preferably hinged on the standard at the position of one of the hinge points. This hinge point is preferably subjected to friction and/or is preferably provided with a clamping device to make the adjustment of the parallelogram construction stiffer, otherwise the adjustment of the parallelogram construction would be too weak/easy, which is undesirable.
An embodiment of the lamp according to the invention is characterised in that the parallelogram construction can be turned around a vertical axis, in which the fulcrum is near the point where the parallelogram construction is hinged on the standard. This puts less strain on this turning axis than would be the case if it were lower down.
A further embodiment of the lamp according to the invention is characterised in that the standard comprises two parts connected to and above each other, in which the top part is connected to the parallelogram construction and can be turned around a vertical axis.
Robotic Desk Lamp
