Practice MCQ Questions and answers on Inventions-GK

Vladimir Zworykin, in full Vladimir Kosma Zworykin, (born July 29 [July 17, Old Style], 1888, Murom, Russia—died July 29, 1982, Princeton, New Jersey, U.S.), Russian-born American electronic engineer and inventor of the iconoscope and kinescope television systems.

Ben also holds a lot of firsts - first U.S. ambassador, first political cartoonist, first American philosopher, organized the first fire department, and on and on.

Thomas Davenport (9 July 1802 – 6 July 1851) was a Vermont blacksmith who constructed the first American DC electric motor in 1834.

In 1853, American inventor Elisha Otis demonstrated a freight elevator equipped with a safety device to prevent falling in case a supporting cable should break. This increased public confidence in such devices. Otis established a company for manufacturing elevators and patented (1861) a steam elevator.
Many people think that he invented the elevator, but the truth is, he invented the elevator brake. He also invented the railway safety brake.

The yo-yo was first used by hunters as weapons. They were wooden disks on strings. In the 1920s, a man from the U.S. named Donald Duncan made the yo-yo into a toy after he visited the Philippines.

He was an undertaker, and legend has it, he developed the automatic switch in 1889, to stop competitors from getting his work.

The system was completed and public use initiated on May 24, 1844, with transmission of the message, “What hath God wrought!” This inaugurated the telegraph era in the United States, which was to last more than 100 years. Key-type Morse telegraph transmitter from the 1840s. Morse telegraph register from the 1840s.

In 1933, Englishman Percy Shaw was driving home when he saw a cat's eyes reflecting. He had been headed straight towards a fence with the cat on it, but on the other side was a drop of hundreds of feet.

On May 20, 1873, San Francisco businessman Levi Strauss and Reno, Nevada, tailor Jacob Davis are given a patent to create work pants reinforced with metal rivets, marking the birth of one of the world's most famous garments: blue jeans.

The first electromagnetic generator, the Faraday disk, was invented in 1831 by British scientist Michael Faraday. Generators provide nearly all of the power for electric power grids.