15 INVENTIONS THAT CHANGE THE WORLD
DIWATA, MICHAEL PAULO E.
CH21FA1- BS CHE
ENGR. EFREN CHAVEZ
American statesman and inventor Benjamin Franklin was particularly interested in electricity and set up a small laboratory in his house to investigate its properties. His interest soon switched from electricity to lightning after he noticed the similarities between the two. One stormy night, he conducted a life-threatening experiment to demonstrate that lightning is the result of an electric build up. He constructed a kite that carried a metal spike and flew it into the thunderstorm. The kite had a key attached near the bottom of the ribbon and Franklin noticed that it sparked as he brought his knuckles close to it. Franklin had shown that lightning was form of electricity and he went on to use this knowledge to design a lightning rod to protect buildings. LINNAEAN TAXONOMY
Linnaean taxonomy is a system of classification of living organism that is used throughout biological sciences. The most important feature of Linnaean Taxonomy is a system known as binomial nomenclature. The first name identifies the genus to which the organism belongs; the second name is its unique species. BIMETTALIC STRIP
A bimetallic strip is a simple device which converts thermal energy into mechanical motion. It is used as a thermally activated switch or heat indicator and works on the principle of differential expansion of heated dissimilar metals. The bimetallic strip is made up of two different metals which are bonded together to form a straight, flat strip or a concentric coil. When the strip is heated, one of the metals heats up and expands faster than the other, causing the strip to bend. This mechanical deflection is then harnessed in various ways to switch electrical circuits or move a dial to a give heat value indication. MARINE CHRONOMETER
A marine chronometer is a clock that is precise and accurate enough to be used as a portable time standard; it can therefore be used to determine longitude by means of celestial navigation. When first developed in the 18th century, it was a major technical achievement, as accurate knowledge of the time over a long sea voyage is necessary for navigation, lacking electronic or communications aids. The first true chronometer was the life work of one man, John Harrison, spanning 31 years of persistent experimentation and testing that revolutionized naval (and later aerial) navigation. SPINNING JENNY
The increased speed of weaving created a new problem because it now took three spinners to keep up with one weaver. This problem was resolved in 1764, when James Hargreaves invented a new machine that was capable of spinning eight threads of cotton yarn, instead of the spinning wheel's one. The new machine was called the spinning jenny. All this time the processes of spinning and weaving were still being carried out at home. This was possible because both the flying shuttle and the spinning jenny were small enough to be used in the cottage. SURVEYOR’S PERAMBULATOR WHEEL
The origins of the surveyor's wheel are connected to the origins of the odometer. While the latter is derived to measure distances travelled by a vehicle, the former is specialized to measure distances. Much of the material on the earliest stages in the development of the hodometer is adequately covered in odometer. In the 17th century, the surveyor's wheel was re-introduced and used to measure distances. A single wheel is attached to a handle and the device can be pushed or pulled along by a person walking. Early devices were made of wood and may have an iron rim to provide strength. The wheels themselves would be made in the same manner as wagon wheels and often by the same makers. The measuring devices would be made by makers of scientific instruments and the device and handles would be attached to the wheel by them. The device to read the distance...
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