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Bifocals
Bifocals were invented in 1784 by Ben Franklin. No double lenses have ever been found among Franklins possessions or any ordinary eyeglasses. Ben Franklin began to advertise eyeglasses for sale in his news paper, the Pennsylvania Gazzette, as early as 1738.
*Bifocals are lenses used to help people with sight problems see better. -
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Inventions
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Cotton Gin
Eli Whitney invented the Cotton Gin in 1794.
Patent number: X72 (US) issued March 14, 1794
Eli Whitney was Born: December 8, 1765 Died: January 8, 1825
* The cotton gin is a machine to help make our clothes and is a standard in the cotton industry. -
Mechanical Reaper
Early farm machines were pulled by draft animals or tractors and used to harvest grain. Its historical predessecors are the sickle and the cradle sythe.
* The mechanical reaper is vital in planting, growing, and harvesting crops and has helped us harvest food faster. -
Morse Code
Morse Code was invented in 1836 by Samuel Morse. The artitrary set of singnals was used on a telegraph. The international Morse Code is a simplified form generally used in radio telegraphy.
*Morse Code helps us send secret messages back and forth, thus helping people at sea, land, etc. -
Continuous Sewing Machine
The continuous sewing machine was invented in 1846 by Elias Howe. Patent 4,750 (US) issued Sept. 10, 1846. Inventor's Birth: July 10, 1819 in Spencer, Massachusetts
* The continuous sewing machine helps sew cotton, linen, ect. into clothes for us to wear so we aren't cold all the time. -
Typewriter
The typewriter was invented in 1872 by Christopher Sholes. Pope Pius XII was the first Pontiff to use a typewriter. The first author to submit a typewritten manuscript was Mark Twain.
* The typewriter helps us write letters and messages, saving time and effort. It also probably a decendant of the keyboard in front of you. -
Telephone
The telephone was invented in 1872 by either Alexander Graham Belle or Elisha Gray. One third of the worlds population has never made a phone call. "Ahoy!" was the original telephone greeting.
* The telephone helps us relay messages quicker than by mail, so we can report or call someone in almost no time at all. -
Zipper
The zipper was invented in 1893 by Whitcomb Judson. For the first twenty years of the zippers existence, it was used exclusivley for boots and tobacco pouches. Zippers today are made not from only metal, but other materials such as nylon.
* The zipper helps us keep warm by helping our jackets trap heat better. -
Air conditioning
Air Conditioning was invented in 1902 by Wills Carrier. Before AC, most industries slowed or stopped in the summer. AC did not affect education.
* Air conditioning helps us keep cool in the summer when it is very hot outside. -
Windshield Wipers
Windshield Wipers were invented in 1905 by Mary Anderson. The driver or passenger of a vehicle had to turn a crank to operate early windshield wipers. Automatic windshield wipers were invented in 1921.
* Windshield wipers keep rain off of windshields when driving, so the drivers have better vision. -
Microwave Oven
The Microwave Oven was invented in 1946 by Percy Spencer. The safest course of action is to avoid putting plastics in the microwave. To avoid risk, heat water only the minimum amount of time needed.
*The microwave oven heats up food in a shorter amount of time, allowing us to us enjoy food quicker. -
Computer Mouse
The computer mouse was invented in 1964 by Douglas Engalbart. Mouse speed is measured in DPI (Dots Per Second) which is the number of pixels the mose cursor is moved when moved one inch. The device is also called a mouse in German, Italian, French, Spanish, and so on.
* The computer mouse helps us move the cursor on a computer and choose links faster.
