Nikola Tesla

Childhood

Tesla was born into a family of ethnic Serbs on 10 July 1856 in the village of Smiljan, then part of the Military Frontier of the Austrian Empire and now part of Croatia. His father, Milutin Tesla (1819–1879), was a priest of the Eastern Orthodox Church. His father's brother Josif was a lecturer at a military academy who wrote several textbooks on mathematics.

Tesla's mother, Georgina "Đuka" Mandić (1822–1892), whose father was also an Eastern Orthodox priest, had a talent for making home craft tools and mechanical appliances and the ability to memorize Serbian epic poems. Đuka had never received a formal education. Tesla credited his eidetic memory and creative abilities to his mother's genetics and influence.

Tesla was the fourth of five children. In 1861, Tesla attended primary school in Smiljan where he studied German, arithmetic, and religion. In 1862, the Tesla family moved to the nearby town of Gospić, where Tesla's father worked as parish priest. Nikola completed primary school, followed by middle school. Later in his patent applications, before he obtained American citizenship, Tesla would identify himself as "of Smiljan, Lika, border country of Austria-Hungary".

In 1870, Tesla moved to Karlovac to attend high school at the Higher Real Gymnasium where the classes were held in German. Tesla later wrote that he became interested in his physics professor's demonstrations of electricity. The "mysterious phenomena" made him want "to know more of this wonderful force". He was able to perform integral calculus in his head, prompting his teachers to believe that he was cheating. He studied three years at the gymnasium, graduating in 1873 at the age of 17.

After graduating, Tesla returned to Smiljan but soon contracted cholera, was bedridden for nine months and was near death several times. In a moment of despair, Tesla's father (who had originally wanted him to enter the priesthood), promised to send him to the best engineering school if he recovered from the illness. Tesla later said that he had read Mark Twain's earlier works while recovering from his illness.

Tesla was a lifelong bachelor, who had once explained that his chastity was very helpful to his scientific abilities. In an interview with the Galveston Daily News on 10 August 1924 he stated, "Now the soft-voiced gentlewoman of my reverent worship has all but vanished. In her place has come the woman who thinks that her chief success in life lies in making herself as much as possible like man—in dress, voice and actions..." He told a reporter in later years that he sometimes felt that by not marrying, he had made too great a sacrifice to his work.

Tesla was a good friend of Francis Marion Crawford, Robert Underwood Johnson, Stanford White, Fritz Lowenstein, George Scherff, and Kenneth Swezey. In middle age, Tesla became a close friend of Mark Twain; they spent a lot of time together in his lab and elsewhere. Twain notably described Tesla's induction motor invention as "the most valuable patent since the telephone". At a party thrown by actress Sarah Bernhardt in 1896, Tesla met Indian Hindu monk Swami Vivekananda. Vivekananda later wrote that Tesla said he could demonstrate mathematically the relationship between matter and energy, something Vivekananda hoped would give a scientific foundation to Vedantic cosmology. The meeting with Swami Vivekananda stimulated Tesla's interest in Eastern Science, which led to Tesla studying Hindu and Vedic philosophy for a number of years. Tesla later wrote an article titled "Man's Greatest Achievement" using Sanskrit terms akasha and prana to describe the relationship between matter and energy. In the late 1920s, Tesla befriended George Sylvester Viereck, a poet, writer, mystic, and later a Nazi propagandist. Tesla occasionally attended dinner parties held by Viereck and his wife.

Tesla could be harsh at times and openly expressed disgust for overweight people, such as when he fired a secretary because of her weight. He was quick to criticize clothing; on several occasions, Tesla directed a subordinate to go home and change her dress. When Thomas Edison died in 1931, Tesla contributed the only negative opinion to The New York Times. He became a vegetarian in his later years, living on only milk, bread, honey, and vegetable juices.

Wireless lawsuits

When World War I broke out, the British cut the transatlantic telegraph cable linking the U.S. to Germany in order to control the flow of information between the two countries. They also tried to shut off German wireless communication to and from the U.S. by having the U.S. Marconi Company sue the German radio company Telefunken for patent infringement. Telefunken brought in the physicists Jonathan Zenneck and Karl Ferdinand Braun for their defense, and hired Tesla as a witness for two years for $1,000 a month. The case stalled and then went moot when the U.S. entered the war against Germany in 1917.

In 1915, Tesla attempted to sue the Marconi Company for infringement of his wireless tuning patents. Marconi's initial radio patent had been awarded in the U.S. in 1897, but his 1900 patent submission covering improvements to radio transmission had been rejected several times on the grounds that it infringed on other existing patents, including two 1897 Tesla wireless power tuning patents, before it was finally approved in 1904. Tesla's 1915 case went nowhere, but in a related case, where the Marconi Company tried to sue the U.S. government over WWI patent infringements, a Supreme Court of the United States 1943 decision restored the prior patents of Oliver Lodge, John Stone, and Tesla. The court declared that their decision had no bearing on Marconi's claim as the first to achieve radio transmission, just that since Marconi's claim to certain patented improvements were questionable, the company could not claim infringement on those same patents.