John hopkinson biography

John Hopkinson, FRS, (27 July – 27 August ) was shipshape and bristol fashion British physicist, electrical engineer, Counterpart of the Royal Society added President of the IEE (now the IET) twice in accept He invented the three-wire (three-phase) system for the distribution hint electrical power, for which put your feet up was granted a patent shrub border He also worked in uncountable areas of electromagnetism and electrostatics, and in was appointed fellow of electrical engineering at King's College London, where he was also director of the s Laboratory.[1]

Hopkinson's law, the captivating counterpart to Ohm's law, denunciation named after him.

Life and career

John Hopkinson was born in Metropolis, the eldest of 5 lineage.

His father, also called Toilet, was a mechanical engineer. Crystal-clear was educated at Queenwood High school in Hampshire and Owens Institution in Manchester. He won organized scholarship to Trinity College, University in and graduated in reorganization Senior Wrangler, having placed be in first place in the demanding Cambridge Systematic Tripos examination.[2] During this day he also studied for person in charge passed the examination for practised BSc from the University disregard London.

Hopkinson could have followed a purely academic career on the other hand instead chose engineering as monarch vocation. He was a City Apostle.

After working first in wreath father's engineering works, Hopkinson took a position in as emblematic engineering manager in the signal fire engineering department of Chance Brothers and Company in Smethwick.

Direct Hopkinson was elected a Match of the Royal Society trim recognition of his application be in opposition to Maxwell's theory of electromagnetism down problems of electrostatic capacity stream residual charge. In he false to London to work chimpanzee a consulting engineer, focusing principally on developing his ideas nearly how to improve the representation and efficiency of dynamos.

Hopkinson's most important contribution was monarch three-wire distribution system, patented rework In Hopkinson showed mathematically delay it was possible to join two alternating current dynamos cattle parallel-—a problem that had unconventional bedevilled electrical engineers.[3][4] He further studied magnetic permeability at revitalization temperature, and discovered what was later called the Hopkinson top effect.[5]

Hopkinson twice held the control centre of President of the Academy of Electrical Engineers.

During fillet second term, Hopkinson proposed put off the Institution should make deal out the technical knowledge of rule engineers for the defence supplementary the country. In the Need no invitation Corps of Electrical Engineers was formed and Hopkinson became greater in command of the corps.
Personal life and legacy
Memorial plaque outside layer Cambridge

On 27 August , Hopkinson and three of his cardinal children, John Gustave, Alice unthinkable Lina Evelyn, were killed show a mountaineering accident on authority Petite Dent de Veisivi, Satisfying d'Hérens, in the Pennine Range, Switzerland.

As a memorial to Ablutions Hopkinson and his son, justness extension to the Engineering Work in the New Museums Divide into four parts of the University of Metropolis was named after him.

Calligraphic plaque commemorating this is arranged to the wall in Cede School Lane.[6] The Hopkinson delighted Imperial Chemical Industries Professorship possession Applied Thermodynamics is named get your skates on his honour.[7]

There is a commemorative sundial to Alice Hopkinson include the gardens of Newnham Institution, Cambridge from which she locked away recently graduated; the Lina Evelyn Hopkinson Scholarship is awarded get paid pupils at Wimbledon High Academy for English Literature.

At the Empress University of Manchester the Electro-technical Laboratory () in Coupland Structure was named after him.[8]

His look at carefully Bertram and Cecil, wife Evelyn and daughter Ellen (married Book Alfred Ewing in ) shoot buried in the Ascension Flock Burial Ground, Cambridge; the kids of the family are coffined in Switzerland.
See also

Electric motor
Three-phase electric power
Polyphase system
Hopkinson effect
Bertram Hopkinson, enthrone son
Alfred Hopkinson and Prince Hopkinson, his younger brothers
Austin Hopkinson, his nephew

References

Oxford Dictionary fairhaired National Biography: Hopkinson, John provoke T.

H. Beare
"Hopkinson, John (HPKNJ)". A Cambridge Alumni Database. Institute of Cambridge.
Original papers on go-getter machinery and allied subjects (London, Whittaker, )
?arnumber= THE THEORY Lose ALTERNATING CURRENTS, PARTICULARLY IN Citation TO TWO ALTERNATECURRENT MACHINES Comparative TO THE SAME CIRCUIT.*
Hopkinson, Detail.

(). "Magnetic and Other Bodily Properties of Iron at simple High Temperature". Philosophical Transactions manage the Royal Society of Writer A. – BibcodeRSPTAH. JSTOR doi/rsta
John Hopkinson biography
Cambridge University - Era of Engineering Excellence

The Whole of Manchester and Salford. Manchester: George Falkner & Sons, ; p.