SMOKE DETECTOR

Randolph Smith and Kenneth House was introduced first smoke detector for home use.

The element's radioactive particles generate a small electric current. If smoke enters the chamber it disrupts the current, triggering an alarm.

Crossword Puzzle

Arthur Wynne was invented the famous crossword puzzle in 1913. He was born in Liverpool and he was journalist. The first crossword puzzle by Wynne was a diamond-shaped puzzle that was published in the Sunday New York World on December 21, 1913.

The first British crossword puzzle appeared on February 1922; it was published in Pearson's Magazine.

Crayons Colors

Edwin Binney and Harold Smith were invented Crayons colors. They owned a paint company in NY, USA. They made crayons by combining paraffin wax with pigments (colorants). These inexpensive art supplies were an instant success since they were first marketed as Crayola crayons in 1903.

CONTACT LENSES

Contact lenses are tiny removable lenses that are worn in contact with the eye. 1508, Leonardo da Vinci was envisioned and later René Descartes around 1636-1637.

But in 1887, German physiologist Adolf Eugen Fick was invented and made. He first fitted animals with the lenses, and later made them for people. These lenses were made from heavy brown glass and were 18-21mm in diameter. The lenses were improved by August Muller in 1889; he made lenses that corrected myopia (nearsightedness).

1948, the first plastic contact lenses were made by California optician Kevin Tuohy. Soft contact lenses (hydrophilic lenses) and gas-permeable lenses (which let oxygen pass through the lens and to the cornea) were invented in the 1970s.

Invention of Compass

During the days of Han Dynasty ( 2nd century BC – 2nd century AD) in china. Actually, lodestone was made this compass, a naturally-magnetic variety of magnetite ore. A spoon-shaped piece of lodestone was placed upon a bronze disk, and the lodestone always pointed north. At that time this compass was not used for navigation, it was used for divination ( like Feng Shui), to determine fortuitous placement of buildings, etc.

Invention of Coca Cola

Dr. John Stith Pemberton was invented coca cola in 8th May, 1886 in Atlanta, Georgia, USA. He had invented many syrups, medicines, and elixirs before, including a very popular drink called French Wine of Coca, which contained French Bordeaux wine, coca leaves, and caffeine (from the kola nut).
   
In 1885, Atlanta banned alcohol consumption, Pemberton had to change the formula of his French Wine of Coca, omitting the French wine. He added sugar, citric acid and essential oils of many fruits to the drink, and the original Coca-Cola was created. It was named for its main ingredients, coca leaves and the kola nut. Coca-Cola quickly became a very popular soda fountain drink.

Chocolate Chips

In 1930, Ruth Wakefield invented chocolate chips (and chocolate chip cookies). Wakefield ran the Toll House Inn in Whitman, Massachusetts. Her new cookie invention was called the "Toll House Cookie."

CELLULAR PHONE

1960s the first automatic analog cellular phone was made. On 3^rd Dec. 1979, NIT was introduced the first commercial cellular phone in Japan. They were introduced in Scandinavia in 1981, in Chicago, USA, on October 13, 1983 (by Motorola), and in Europe in the late 1980's. Early mobile FM (frequency modulation radio was invented by Edwin H. Armstrong in 1935) radio telephones had been in use in the USA since 1946, but since the number of radio frequencies are very limited in any area, the number of phone calls was also very limited.

Cellophane

Jacques Edwin Brandenberger was invented Cellophane in 1988. Basically it’s a thin, transparent, waterproof, protective film that is used in many types of packaging. He had originally intended cellophane to be bonded onto fabric to make a waterproof textile, but the new cloth was brittle and not useful.

Cellophane is very useful for these type of packaging material. Later Dupont Company bought the rights to cellophane in 1927

Who invent cat's eye road reflector?

In 1933, Percy Shaw from Yorkshire, England was first person who invented cat’s eye. He invented it after he had been driving on a dark, winding road on a foggy night; he was saved from going off the side of the hill by a cat, whose eyes reflected his car's lights. Cat’s eye is one the famous inventions because this device saved countless lives.

He was awarded the Order of the British Empire ("OBE") by Queen Elizabeth of England in 1965.