BibTeX:

@article{IJIRSTV1I9004,
     title={Power Magnification by Chain Drive},
     author={Smit Patel, Meet Patel, Anand Patel, Chetan Sanghani and Diptesh Patel},
     journal={International Journal for Innovative Research in Science & Technology},
     volume={1},
     number={9},
     pages={1--4},
     year={},
     url={http://www.ijirst.org/articles/IJIRSTV1I9004.pdf},
     publisher={IJIRST (International Journal for Innovative Research in Science & Technology)},
}

A bicycle includes a speed-increasing mechanism interposed between the driving sprocket and the driven sprocket. The speed-increasing mechanism includes a small intermediate sprocket mounted rotatably on the frame of the bicycle, a first chain trained on the driving sprocket and the small intermediate sprocket, a large intermediate sprocket connected securely and coaxially to the small intermediate sprocket, and a second chain trained on the large intermediate sprocket and the driven sprocket. The radius of the small intermediate sprocket is smaller than that of the driving sprocket, while the radius of the large intermediate sprocket is greater than that of the driven sprocket. In one embodiment, the frame includes a generally U-shaped bracket having two symmetrical, parallel, upright side walls each of which has a notch cut formed in the upper end thereof, a shaft positioned between the side walls of the bracket, two three add holes respectively formed in two end surfaces thereof, and two lock bolts respectively extending through the notches cut of the bracket to engage with the threaded holes of the shaft so as to retain the shaft on the bracket. The large and small intermediate sprockets on same hub are journalled on the shaft.

Sprocket, Chain, Shaft, Teeth, Torque, Speed