Zénobe Gramme

Zénobe Gramme
Zénobe Gramme
Born	(1827-04-27)27 April 1827 Jehay-Bodegnée, Belgium
Died	20 January 1901(1901-01-20) (aged 74) Bois-Colombes, France
Resting place	Père Lachaise Cemetery
Nationality	Belgian
Occupation	electrical engineer
Known for	Gramme dynamo

Zénobe Théophile Gramme was a Belgian electrical engineer. He was born at Jehay-Bodegnée on 4 April 1826, the sixth child of Mathieu-Joseph Gramme, and died at Bois-Colombes on 20 January 1901. He invented the Gramme machine, a type of direct current dynamo capable of generating smoother (less AC) and much higher voltages than the dynamos known to that point.

Gramme machine as motor

In 1873 he and Hippolyte Fontaine accidentally discovered that the device was reversible and would spin when connected to any DC power supply. The Gramme machine was the first usefully powerful electrical motor that was successful industrially. Before Gramme's inventions, electric motors attained only low power and were mainly used as toys or laboratory curiosities. In 1875, Nikola Tesla observed a Gramme machine at the Graz University of Technology. He conceived the idea of using it for alternating current but was unable to develop the idea at this time.

Family

In 1857 he married Hortense Nysten who was a widow and mother of a daughter, Héloïse. Hortense died in 1890.

Death and tributes

Gramme died at Bois-Colombes, France, on 20 January 1901 and was buried in Père Lachaise Cemetery.

In the city of Liège there is a High School, L'Institut Gramme, named after him.

In 2005 he ended at the 23rd place in the election of Le plus grand Belge (The Greatest Belgian), the television show broadcast by the French-speaking RTBF and based on the BBC show 100 Greatest Britons.

Picture gallery

• 
  Zénobe Gramme, by Mathurin Moreau
• 
  Grave at Cemetery Père-Lachaise
• 
  Gramme machine

External links

• French Wikipedia article