power generation from door opening
#1

please send some information about this project and tools and requirements and cost send to tasrifanwar[at]gmail.com
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#2

A method and an apparatus for generating electricity from the ordinarily wasted mechanical energy expended when opening a door. The apparatus includes a ratchet attached to a door which rotates a connecting shaft when the door is opened. The connecting shaft is connected by a gear train to a spring housing in which a spiral shaped spring is fitted and connected to a spring shaft. The spring shaft is coupled by a second gear train to the driveshaft of a generator. Opening the door causes compression of the spiral plate spring, which causes rotation of the driveshaft of the generator in order to generate electricity when the spring is uncoiled. A stopper engages teeth on the bottom plate of the spring housing to prevent reverse rotation of the spring shaft when the door is closed.
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