Sabado, Hunyo 11, 2011

Assignment and Answer #2

Post on your blog an invention which was created due to necessity? You may post a video, a picture of the invention and it's story or even an article how the invention came about, don't forget to include your source. I'll check your blogs next friday, June 17,2011.






Baron Karl Drais von Sauerbronn - Early Bicycles


The German Baron Karl Drais von Sauerbronn invented the "Laufmaschine" or "Running Machine", a type of pre-bicycle. The steerable Laufmaschine was made entirely of wood and had no pedals; a rider would push his/her feet against the ground to make the machine go forward. Sauerbronn's bicycle was first exhibited in Paris on April 6, 1818. The celerifere was another similar early bicycle precursor invented in 1790 by Frenchmen, Comte Mede de Sivrac, however, it had no steering.
Penny Farthing
The Penny Farthing is also referred to as the 'High' or 'Ordinary' bicycle, and the first one was invented in 1871 by British engineer, James Starley. The Penny Farthing came after the development of the 'Hobbyhorse', and the French 'Velocipede' or 'Boneshaker', all versions of early bikes. However, the Penny Farthing was the first really efficient bicycle, consisting of a small rear wheel and large front wheel pivoting on a simple tubular frame with tires of rubber.

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