This is one of the simplest machines designed by Leonardo in order to improve the human performance. A lever connected to the hammer is moved by means of an eccentric cam. At each turn of the handle, the hammer gives a stroke. As a matter of fact, the real hammer is supposed to be powered by a water paddle-wheel. An implementation with a paddle-wheel powered by sand is planned for the next future.
Released on 2nd February 2006, WitS is my biggest and the most complex paper automaton I ever designed.
On 16 September 2005, the automaton Sweet Dreams was launched on the web. At that time, it was considered the first paper automaton employing the mechanism called Geneva stop.
The Geneva stop (or Geneva drive) is a mechanism that translates a continuous rotation into an intermittent rotary motion. It is an intermittent gear where the drive wheel has a pin that reaches into a slot of the driven wheel and thereby advances it by one step. The drive wheel also has a raised circular blocking disc that locks the driven wheel in position between steps. The name derives from the device’s earliest application in mechanical watches, Switzerland and Geneva being an important center of watchmaking. One application of the Geneva drive is in movie projectors: the film does not run continuously through the projector. Instead, the film is advanced frame by frame, each frame standing still in front of the lens of 1/24th of a second. (from Wikipedia)
This is a study for a life-size model that maybe in the future I will build. It measures mm 300x221x408. The 3D model was prepared after re-topologization of a model downloaded from the “INRIA Gamma team research database Website Collections”
(www-roc.inria.fr/gamma/download/).
Here, in the Northern Hemisphere, is winter. But do not forget that in the other half of our Earth is summer, with warmy and sunny days! So, as the first post of my new site, I decided to add an old webpage illustrating the procedure for a fantastic tomato souce, together with a delicious Italian recipe. Enjoy them!
Nel nostro emisfero è inverno, ma non dimentichiamoci che nell’altra metà della nostra Terra è estate, con tanti giorni caldi ed assolati! Come primo post ho quindi pensato di aggiungere una mia vecchia pagina web che illustra la procedura per ottenere una fantastica salsa di pomodoro, assieme ad una deliziosa ricetta italiana. Gustatele entrambe!
Click to the Tomato Souce Webpage
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