John Ambrose Fleming
Physicist, Inventor of the Vacuum Tube
Born
November 29th, 1849
175 years ago
Died
April 18th, 1945
80 years ago — 95 years old
Category
Scientists & Innovators
Country
United Kingdom
Links & References
Contributions to electrical engineering and physics include the invention of the vacuum tube in 1904, which facilitated the development of radio technology and electronic communication. Developed the Fleming valve, crucial for early electronic amplifiers. Held a professorship at University College London and served as president of the Institution of Electrical Engineers. Engaged in various scientific organizations, contributing to advancements in telephony and radio broadcasting.
Invented the vacuum tube in 1904
Developed the Fleming valve
Other People Born on November 29th
Silvio Rodríguez
A prominent figure in the Nueva Canción movement in Latin America, contributed to the Cuban music scene beginning in the late 1960s. Combines folk music with socially and politically charged lyrics, often reflecting themes of love, revolution, and human rights. Gained popularity not only in Cuba but also across Spanish-speaking countries and among international audiences. His music often incorporates elements of traditional Cuban music, and he has released numerous albums, becoming a symbol of resistance and cultural identity.
Continue ReadingAntanas Škėma
Born in 1910, this individual emerged as a prominent figure in Lithuanian theater and cinema. After studying in various cultural institutions, the actor gained attention for performances in notable productions. Demonstrating a multifaceted talent, he also directed plays, contributing to the advancement of the theater scene in Lithuania. His work bridged folklore and modernist themes, influencing future generations of performers and directors. The individual faced challenges during the war and later emigrated, continuing to engage with the arts in exile, where they remained active in promoting Lithuanian culture.
Continue ReadingBill Freehan
A professional baseball player and coach, played as a catcher for the Detroit Tigers in Major League Baseball from 1961 to 1976. Achieved significant success, including being an All-Star selection five times. After retiring as a player, transitioned into coaching before exploring a career in sportscasting. Contributed to baseball as a mentor through various roles in minor league baseball and spring training camps.
Continue ReadingJean-Martin Charcot
A prominent neurologist and psychologist, contributions included pioneering work in neurology and the study of hysteria. Established clinical methods for examining and diagnosing neurological disorders. Played a significant role in teaching and mentoring, influencing the development of psychiatry and neurology as distinct fields. Contributions to the understanding of multiple sclerosis and other neurological conditions laid groundwork for future research.
Continue ReadingHinton Battle
Born in Germany, an acclaimed actor, dancer, and choreographer moved to the United States at a young age. Achieved recognition on Broadway, performing in productions such as 'The Wiz,' 'Dreamgirls,' and 'Fosse.' Worked as a choreographer for various stage adaptations, showcasing expertise in dance and movement. Transitioned to television and film, appearing in series like 'The Cosby Show' and 'The Twilight Zone.'
Continue ReadingJanet Napolitano
Served as the Secretary of Homeland Security from 2009 to 2013, overseeing the department during the administrations of Presidents Obama and Trump. Previously held the position of Governor of Arizona from 2003 to 2009, making her the first woman to hold that office. Worked as the Attorney General of Arizona from 1999 to 2003. After leaving public office, became the president of the University of California system.
Continue ReadingOther People Who Died on April 18th
Aleksander Mitt
This individual was an Estonian speed skater who competed in the 1936 Winter Olympics held in Garmisch-Partenkirchen. During the Olympic Games, this athlete excelled in both the 500 meters and 1500 meters events, showcasing remarkable skill and endurance. Aside from the Olympic participation, this skater was involved in national competitions and left a legacy in Estonian winter sports. The achievements in competitive speed skating helped to promote the sport within Estonia during the early 20th century.
Continue ReadingAgallianos Kontoskeles
Served as a Byzantine commander during a turbulent period in the empire. Led a major rebellion against the ruling authorities around 727 AD. His actions were significant in the context of the ongoing conflicts that characterized the Byzantine Empire during this era. The rebellion under his command reflected the challenges faced by the Byzantine state in managing provincial dissent.
Continue ReadingMaurice Gamelin
Served as a general in the French Army during World War II, particularly during the early phases of the conflict. Held the position of Chief of the French Army between 1939 and 1940, leading military operations during the Battle of France. Oversaw defensive strategies against the German invasion in 1940. After the fall of France, faced criticism and was eventually removed from command. His military strategies and decisions during this period have been widely studied by historians.
Continue ReadingGustave Moreau
A prominent figure in the Symbolist movement, this painter is recognized for his elaborate and fantastical works. He studied at the École des Beaux-Arts and displayed his talent at the Salon, gaining significant attention. Themes of mythology and fantasy permeated his paintings, characterized by intricate details and vibrant colors. A key influence on subsequent generations of artists, this individual's work inspired the likes of the Fauves and Surrealists. In addition to painting, he contributed to the academic field as a teacher, leaving a lasting legacy in art education.
Continue ReadingLyra McKee
A journalist and author recognized for investigative reporting, particularly focused on issues affecting Northern Ireland. Contributed to various publications, including the Guardian and Atlantic. Wrote ‘Angels with Blue Faces,’ a book that explored the life and death of a young man from Derry, and delved into the legacy of the Troubles. McKee was also an advocate for the rights of the LGBTQ+ community. Passed away in 2019 during a riot in Derry while reporting.
Continue ReadingMarie-Josephte Corriveau
In the 18th century, a woman committed multiple murders which led to her becoming a notorious figure in Canadian history. After her husband's death in 1751, suspicions arose regarding her involvement. Following the death of a second husband, allegations of murder escalated, resulting in her arrest. Captured and put on trial, she was found guilty and sentenced to death. The execution became a public spectacle, and her story was immortalized in folklore and literature, leading to lasting intrigue surrounding her life and actions.
Continue Reading