On February 14, 1819, American inventor Christopher Latham Sholes was born, who invented the first practical typewriter and is responsible for the QWERTY keyboard layout still in use today.
Christopher Latham Sholes began working as an apprentice to a printer in his teenage years and later became a newspaper publisher and politician. He started a partnership Samuel W. Soule, Charles F. Kleinstuber, and Carlos Glidden to develop a printing device, focusing on numbers at first. Unfortunately, they were not the only ones, since numerous patents were applied for globally. The curious printers and inventors around Sholes however, found that all machines broke easily and could not maintain on the market.
Their recently built numbering machine became a somewhat great success and they decided to work on a further device, assisted by the German clock builder Matthias Schwalbach and by September of 1866, a model including the full alphabet, numbers and basic punctuation was completed. They immediately began typing letters to potential buyers of their idea and found in James Densmore a decent investor. The patent for the ‘typewriter‘ was filed on June 23, 1868 and its manufacture began in Chicago with the financial help of Densmore.
The businessmen, inventors and engineers continued their development on the machine building on work of other typewriter engineers as well. The new machines were tested on people like James Clephane, who was occupied as a stenographer and destroyed numerous machines through his heavy use. After further versions and refinements, the typewriter entered the market on July 1, 1874.
Even though numerous tests were performed the machines still lacked of reliability and were only sold 400 times by the end of 1874. It was exhibited at the Centennial Exhibition two years later, but Alexander Graham Bell  clearly focused the attention on himself demonstrating the telephone. However, Mark Twain was one of the first authors to buy and use the typewriter for his works. In a letter to his brother in 1875, he noted:
“I am trying get the hang of this new fangled writing machine, but am not making a shining success of it. However this is the first attempt I have ever made, & yet I perceive that I shall soon & easily acquire a fine facility in its use. . . .The machine has several virtues. I believe it will print faster than I can write. One may lean back in his chair & work it. It piles an awful stack of words on one page. It don’t muss things or scatter ink blots around. Of course it saves paper.“
During the years of development, the QWERTY keyboard was invented. Early versions contained a total of two rows with alphabetically ordered letters. The problem with the arrangement was that the metal arms jammed into neighboring arms when pressed either at the same time or shortly after. Commonly used letter pairs were to be separated from each other, this way the speed of typing could also be increased. After years of rearranging the letters and numbers on the keyboard and the qwerty keyboard as we know it today was born.
Christopher Latham Sholes died on February 17, 1890 after battling tuberculosis at age 71.
At yovisto academic video search you may learn more about typewriters in a demonstration of various types used in 1944 by the US Navy.
References and Further Reading:
-  A Brief History of Typewriters
-  The typewriter. an informal history at IBM
-  Christopher Latham Sholes at Wikidata
-  Timing is Everything – Elisha Gray and the Telephone Patent, SciHi Blog, August 2, 2013.
-  Image grid with various keyboard layouts, via Wikidata