How to Build a Reciprocal Roof Frame

A reciprocal roof frame This is a long-delayed post about building my reciprocal roof frame. This entry documents the details of building my reciprocal roof frame, including the type of wood I used, the number of rafters, and the work process itself. I hope that this will be useful for individuals who want to attempt building a similar frame. Raising the reciprocal roof A reciprocal roof is a beautiful and simple self-supporting structure that can be composed of as few as three rafters, and up to any imaginable quantity (within reason, of course). My Reciprocal Roof Frame Here are some specs of my reciprocal roof frame: 14 primary raftersBlack locust poles except for one pin oak (used green)All rafters have a diameter of roughly 5″ at the top end of the poles (heavy!) In total, the roof frame is composed of 28 poles. Note “charlie stick” holding roof up during building The Charlie Stick You will need a sturdy center post, or “charlie stick” to temporarily prop up the rafters. Heavy poles! Related: WoodWorking

Brian Kerr's router lathe Brian Kerr writes: Hi Matthias, I thought you might be interested in seeing another application resulting from your gear generator. I’ve been thinking about a marble machine for a while and as part of it I wanted to have one way of lifting the marbles be done with an Archimedean screw. At first I considered a separate machine using the same small router I have for the 3D pantograph from your design. Here’s the finished jig – or at least the first prototype: Headstock attachment point. It attaches to the tailstock end using threaded holes intended for an extension bed. The “carriage” for the router rides on metal electrical conduit pipes – straight and inexpensive. The crank was a starting point and at first I thought I was going to need some gearing or to use a variable speed drill for turning the rod but once I tried it the hand crank was just the right speed for cutting, although a bit tedious for running the carriage back from one end to the other. Here is a photo of the first cutting.

Reciprocal frame architecture L'architecture de pierre sèche / dry stone architecture Understand 1,700 Mechanical Linkages with these Helpful Animations Mr. Đức thắng Nguyễn (Duc Thang Nguyen) is an engineer from Vietnam. Since his retirement in 2002, he has being working on an amazing animated 3D catalog of mechanical contraptions. Using Autodesk Inventor as a tool, he has documented over 1,700 mechanisms. Through a file-sharing website, Nguyen generously provides an overview of all his contraptions nicely organized into mechanical themes. There are so many to pick from, but here are 10 of my personal favorites: Linkage for tracing a parallelogram Persian joint Application of rack pinion mechanism Planetary clutch Door for limited space Keeping direction unchanged during rotation Archimedean drive Friction cone variator Internal Geneva mechanism Converting interrupted rotation to continuous rotation

Le recours aux forêts index Downloads Collected on this page are all of the downloads for the clocks. This includes the drawings for the clocks in PDF format which are available for free. Simply click on the highlighted link under Free Files. You will need to have Adobe Acrobat loaded for the files to be opened so if you don’t have it you will need to get it loaded. The premium files are arranged under the clock headings and offerings vary for each clock. To obtain the files click on the PayPal button which will take you to a PayPal page which will give you the opportunity to pay either by PayPal or Credit Card. Having completed the details you should be taken to a page from which you can download the files. I should in fairness point out that these clocks are not easy to build and can be a challenge, particularly if you don’t have all the kit needed to build them. For more free files go to the Projects Tab Materials source McMaster-Carr Clock 22 DXF, DWG, IGS, STP, Model and drawing files. Clock 1,2,4 and 5 DXF Files

le site du réseau écolo libertaire (écologie, anarchie, distributisme pour un autre monde) Découvrez la maison bioclimatique enterrée à 10 000 € !!! Remontoire for Woodenclocks After developing the design of the Woodenclocks Gravity escapement to the point where it was working quite accurately I had started to think if there might be something else I could do with the clock design to improve the the overall efficiency of the clocks. I had always had problems with the gear train working smoothly and consistently, so this seemed a reasonable area to look at more carefully. By the nature of a clock the gear train is going to have to start and stop with each action of the escapement, so when the escapement is engaged, the gear train stops moving and when it releases it will start moving again, this happens with every tick of the clock. The problem here is that each engagement of the escapement involves a certain amount of friction, and two types of friction at that. Remontoire action One the ways to reduce the static friction in the drive train is to introduce a remontoire , the simplest type of remontoire invented by Robert Robin in 1772. Conclusion

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