Charles Proteus Steinmetz
Mathematician and engineer; alternating current
Born
Died
1923
102 years ago — 58 years old
Category
Scientists & Innovators
Country
United States
Links & References
A Polish-American mathematician and engineer, significant contributions were made to the development of alternating current electrical systems. The invention of the Steinmetz equivalent circuit improved the understanding and design of electrical networks. Academic tenure included a position at Union College, where teaching and research flourished. Work focused on electrical phenomena, including hysteresis in magnetic materials. Steinmetz also was involved in early work on electrical engineering standards and codes, influencing the future of the industry.
Developed the Steinmetz equivalent circuit
Worked on alternating current systems
Contributed to electrical engineering standards
Other People Born on April 9th
Ihor Podolchak
Ukrainian director and screenwriter
Born
April 9th, 1962 63 years ago
A Ukrainian director, producer, and screenwriter, created numerous films focusing on themes of identity and culture. Directed the acclaimed film 'Viy', which earned recognition in the international film circuit. Worked on various projects that highlight Ukrainian history and the human experience, helping to shape the national cinema landscape.
Continue ReadingYitzhak Navon
Israeli politician and statesman
Born
April 9th, 1921 104 years ago
Died
November 6th, 2015 10 years ago — 94 years old
Served as the fifth President of Israel from 1978 to 1983. Participated in the establishment of the Israeli educational system and promoted Hebrew culture. Involved in diplomatic efforts, including relations with Arab nations. Contributed to peace initiatives, particularly with Egypt. Authored several works on Israeli and Hebrew culture.
Continue ReadingNigel Shadbolt
Computer Scientist and Academic
Born
April 9th, 1956 69 years ago
A computer scientist and academic focused on artificial intelligence and open data. Significant contributions to the development of the Semantic Web. Served as a professor at the University of Southampton and co-founded the Open Data Institute. Engaged with government initiatives on data transparency and digital innovation.
Continue ReadingJohn Davenport
English minister, co-founder of New Haven
Born
April 9th, 1597 428 years ago
Died
May 30th, 1670 355 years ago — 73 years old
An English minister established the New Haven Colony in 1638. This settlement served as a significant Puritan community and contributed to early colonial governance. With a strong emphasis on religious and civic life, the colony adhered to strict Puritan principles. In addition to his role in founding New Haven, this minister was involved in various religious and civic activities, promoting a theocratic model of governance that influenced later developments in the American colonies. His leadership helped shape the social structure and community values within the colony until his death.
Continue ReadingDavid Robertson
Baseball pitcher with Chicago White Sox
Born
April 9th, 1985 40 years ago
Debuted in Major League Baseball in 2008. Played primarily as a relief pitcher. Represented the New York Yankees for multiple seasons, contributing to a strong bullpen. Served as a key reliever for the Chicago White Sox. Recorded significant saves during playoff runs and earned All-Star selections. Participated in the 2017 World Series with the Houston Astros.
Continue ReadingBrad Dexter
American actor in 'The Magnificent Seven'
Born
April 9th, 1917 108 years ago
Died
2002 23 years ago — 85 years old
Born in 1917, an American actor gained recognition for roles in classic films, notably 'The Magnificent Seven' and 'The Brothers Karamazov'. Started acting career in the late 1940s, appearing in numerous films throughout the 1950s and 1960s. Also involved in television series, contributing to a variety of genres. Worked alongside notable actors, establishing a presence in Hollywood during that era.
Continue Reading