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Plate 11A Butterfly |
11B Knotting Resistance Wire
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11C Textile Industry |
11D Decorative Flower
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Heat Engine - Nitinol Metal Engine driven by hot & cold water.
Nitinol is considered as ‘smart material’ that has helped to produce number of innovative products. The unique character of Nitinol has in the process inspired to creating number of interesting innovative products. The movement of butterfly wings (plate 10A) is possible by installing Nitinol wire in the wings so that it may flap because of the changing temperature that is produced through heat. Heat energy is converted into mechanical motion for the flapping of the wings. Dr. Alfred Johnson has developed the heat engine that has helped to convert it to mechanical motion.
“The Heat Engine is a very special kind of heat engine that demonstrates the conversion of heat energy into mechanical energy. ... Dr. Alfred Johnson was granted a patent on this type of heat engine in 1977 patent # 4,055,955.
It uses the unique property of Nitinol alloy to generate mechanical motion from heat. Nitinol has trained into a shape at high temperature (about 600° C) and allowed to cool to room temperature, where it can be easily deformed and welded into a loop.
When heated above a transition temperature (in this application about 50° C to 70° C) the Nitinol object abruptly returns to its high-temperature shape with a substantial force that is able to drive the pulleys and thus create motion.” |
