Nicolae Vasilescu Karpen (December 10 (O.S.)/December 22 (N.S.), 1870, Craiova – March 2, 1964, Bucharest) was a Romanian engineer and physicist, who worked in telegraphy and telephony and had achievements in mechanical engineering, elasticity, thermodynamics, long distance telephony, electrochemistry, and civil engineering.
After studying at the Carol I High School in Craiova, he went to the School of Bridges, Roads and Mines in Bucharest. After graduating in 1891, he worked as a civil engineer for three years. He went to France to study physics at the University of Paris. In 1904 he was awarded a PhD in physics for his thesis Recherches sur l'effet magnétique des corps electrisés en mouvement (Research on the magnetic effect of electrified bodies in motion). After a year as a professor at the University of Lille, he returned to Romania to teach at the School of Bridges, Roads and Mines, where he was appointed director in February 1920. As a result of his efforts, the School was transformed later that year into the Polytechnic University of Bucharest. Vasilescu Karpen was the first rector of this university, serving in that capacity until 1940.
In 1908 he is said to have invented the Karpen Pile. He was the engineer who introduced a permanent wire telecom bridge between Brasov City and Bucharest. He introduced electrically transmitted "wired telegrams" in the Old Romanian Kingdom by 1920. He was elected to the Romanian Academy in 1922.
The Karpen Pile is claimed to be a battery that has provided continuous energy for over 60 years, making it either a supremely effective method of storing energy or a hoax, furthermore some newspapers describe it as a perpetuum mobile, but most scientists disagree since such a device would violate the Second law of Thermodynamics. The device is housed at the Dimitrie Leonida National Technical Museum, and by 2010 it had been working there continuously for 60 years.
- (Romanian) Academia RPR, Dicționar Enciclopedic Român, București: Editura Politică, 1962-1966
- (Romanian) Personalități românești ale științelor naturii și tehnicii - Dicționar, București: Editura Științifică și Enciclopedică, 1982, pp. 400-401
- (Romanian) Mihai Olteneanu, Nicolae Vasilescu - Karpen 1870 - 1964, Univers Ingineresc, anul XVIII, Nr 1 (335) 1-16 ianuarie 2005, accessdate 2011-06-05
- Sandru, Ovidiu. "Karpen's Pile: A Battery That Produces Energy Continuously Since 1950 Exists in Romanian Museum". Retrieved 20 July 2012.
- Nicolae Vasilescu Karpen
- (Romanian) "Nicolae Vasilescu-Karpen (1870-1964)", short biography by Remus Răduleț
- "For a continuous working of the Vasilescu-Karpen's concentration pile", by Mihai Dogaru and Mircea Dimitrie Cazacu
- "University Politehnica of Bucharest", short history
- (Romanian) "Pila nemuritoare", I. Golea, Ziua, March 11, 2006
- , The "Dimitrie Leonida" National Technical Museum