62 results found displaying 22-24
    
socratesOne
 USA
3D Printing on large scale with Cob Printer Friendly Version
Cob is a natural building material made of sand (or sand-rich soil), clay (or clay-rich soil), water, and straw. It is traditionally used by mixing the ingredients with your feet, forming it into small oblong balls about 2 liters in volume, and pressing it against other cob balls to form structures such as walls.
3D printing is an additive manufacturing process whereby an object is built one layer at a time, automatically, much like the way a printer prints an image on a page.
My idea is to use existing technology to automate the process of building cob structures.
To do this, the envision a tri-pole, large scale 3D printer consisting of a machine roughly the size of a car (which may or may not be "driven" by an individual or a computer program), and containing a "print head" the size of consumer multi-color laser printer.
The "print head" is a chamber made primarily of two perpendicular metal plates to serve as the guides for each wall (thickness of the walls would be the distance between the plates), a feeder which adds new cob to the chamber, and piston which packs the cob into the chamber.
The head would be attached to a machine that has the ability to gather materials from the local environment, or from pre-made piles of sand, clay, and straw. The exact details of automating the process of combining each is an engineering challenge yet to be solved.
The machine would mix the cob, form it into blocks, add it to the queue, and move the head in high precision. The car-sized machine itself will be moved in low precision by three cables that reach up to the tops of three poles approximately 30-40 ft in the air and 30-40 feet apart from each other (telephone polls may be used), the exact dimensions giving the total range of the size of the constructed building.
Reward: A house built in the "earthship" style (passive solar heating, off grid power and water, etc...), made with the device. 

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nickyhiten
 South Africa
Insight on the outside Printer Friendly Version
People who stay in apartments/houses/anywhere with boring, depressing or even ugly views through their windows, will benefit from this. A tranquill forest scene or a sandy beach with the usual scenery, there are millions of suitable pictures. Place these pics: Size to extend past window's edges, in an advertising sign board type of frame. Attach this to the wall outside the window, so that the view from inside is now the picture you chose. What if you get bored with that picture? Well remember the old cameras with their roll of film? Use the same concept inside the frame i.e.: a tube on either side of the frame with the picture running across the window from tube to tube. Take it even further. Put a daylight sensitive switch or a timer on the invention, and fill the tubes with 30 different pics on a roll, a new one each day, which automatically changes because of your timer. Wouldn't you like to see a beautiful sunrise over the sea when you open your curtains? OR a tiger drinking water from a mountain stream? The list is endless.
Reward: Send me the blue print of the machine, so that I can have one built for myself. 

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40°

    
JestBlaze
 USA
Electric Power Gutters Printer Friendly Version
This plastic replacement downspout would feature small directional water wheels in the gutter and small generators wired together with weather proof wiring on the outside of the downspout. The most electricity would be produced if each descending waterwheel was only allowed to spin in the opposite direction the wheel above it would spin. The generators would have alternating polarity in their generating magnets to create a DC current. This would save an unknown amount on your electric bill, depending on how much it rains. The top of the gutter would need a guard to stop leaves and other debris from entering.
Reward: Installation on a moderate house of my choice. 

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