The third generation David

David III, die dritte Generation von David Webstühlen, wurde in vielerlei Hinsicht noch weiter verbessert. Nachfolgend beschreiben wir die Details der Verbesserungen des David 3:

Erstens das einzigartige System, das unser großes Tieffach erzeugt. 

The David has a single set of lams that connect to the treadles and shaft movement is only in one direction, downward.  The shed of the David III has similarities with a counter-march shed: The warp threads are pulled both upwards and downwards, just as with a countermarch loom, so that an optimal shed is created.

In the rest position all shafts and thus the entire warp are pulled up by the springs. Depressing a treadle pulls down the tied-up shafts and thus part of the warp.

When a treadle is depressed, the springs of the tied-up shafts are stretched. Generally, more force is required the more you stretch a spring. With the David, that spring force transfers through the unique cam discs. During their rotation, the force required to depress a treadle reduces.  The result: Only in their highest position the shafts are pulled up considerably and when you press a treadle you will notice the opposite of what you are used to: The further you press a pedal, the lighter it is and the weight of your leg is sufficient to keep the shed open.

So the David has the shed of a counter-march, with a simpler tie-up system. Tie-ups are easy.  Tie-up cords remain permanently attached to the lams and can then be moved across the lam to the appropriate treadle, at which point you only have to hook the cord to the screw head.

A full list of improvements can be found here: