Work on the Projection drawing table

Work on the Projection Drawing Table
Lately we worked again on the Projection Drawing Table. This drawing table is a Demotech design made some twenty years ago. Somehow we liked it, as it properly functioned. But we were not fully satisfied, as this design had complex details, not easy to make.
Our visit to The Gambia gave a new impuls. A technical school could use it very well. We experienced the ease and precision with which students worked wood into thin smooth battens. We liked to use such battens in a re-design of the drawing table.
Also we drew inspiration from a visit to a revalidation clinic in Mexico. People in wheelchairs could also use the drawing table when certain modifications could be realized.
Now we have the new prototype ready to test: very compact when folded, the A2-table top with glass center easy to adjust in angle and height, a lift for the slide projector ajustable in height with a rotating handle ... Very light, as only 13 mm thick battens have been used. Yet stable, because of the use of a box-like structure, standing up against tortion. This tortion box is combined with bearings for the winch. No screws or hinges are used. All fastenings can be made out of tin or wire, to be copied without cost. And while sitting in an easy (wheel) chair, you can place the table top in a comfortable position over your lap.
Now the first new prototype is complete, it is easy to find further simplifications. These are on our programm for the next days.