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304:. Hopkinson's most important contribution was his three-wire distribution system, patented in 1882. In 1883 Hopkinson showed mathematically that it was possible to connect two alternating current dynamos in parallel-—a problem that had long bedevilled electrical engineers. He also studied magnetic permeability at high temperature, and discovered what was later called the
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Hopkinson twice held the office of
President of the Institution of Electrical Engineers. During his second term, Hopkinson proposed that the Institution should make available the technical knowledge of electrical engineers for the defence of the country. In 1897 the Volunteer Corps of Electrical
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affirmed
Hopkinson's claim to priority of invention, but his British patent expired before the case was resolved, rendering him ineligible for a US patent (his US patent, had one been issued, would have expired concurrently with his British patent).
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There is a memorial sundial to Alice
Hopkinson in the gardens of Newnham College, Cambridge from which she had recently graduated; the Lina Evelyn Hopkinson Scholarship is awarded to pupils at
315:, for which Hopkinson was granted a British patent in 1881, would prove to be an important advance in the development of electric railways. He applied for a US patent in 1892, triggering an
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Hopkinson, J. (1884). "The theory of alternating currents, particularly in reference to two alternate-current machines connected to the same circuit".
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On 27 August 1898, Hopkinson and three of his six children, John
Gustave, Alice and Lina Evelyn, were killed in a mountaineering accident on the
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to work as a consulting engineer, focusing particularly on developing his ideas about how to improve the design and efficiency of
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After working first in his father's engineering works, Hopkinson took a position in 1872 as an engineering manager in the
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Decisions of the commissioner of patents and of the United States courts in patent and trade-mark and copyright cases
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261:. Hopkinson could have followed a purely academic career but instead chose engineering as his vocation. He was a
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As a memorial to John
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examination. During this time he also studied for and passed the examination for a
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Hopkinson and
Imperial Chemical Industries Professorship of Applied Thermodynamics
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Original papers on dynamo machinery and allied subjects (London, Whittaker, 1893)
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the
Electro-technical Laboratory (1912) in Coupland Street was named after him.
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179:) system for the distribution of electrical power, for which he was granted a
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was named after him. A plaque commemorating this is fixed to the wall in
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Engineers was formed and
Hopkinson became major in command of the corps.
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556:"Magnetic and Other Physical Properties of Iron at a High Temperature"
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Journal of the
Society of Telegraph-Engineers and Electricians
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Cambridge University - 125 Years of Engineering Excellence
640:. Washington, DC: Government Printing Office. pp. 1–5.
699:. Manchester: George Falkner & Sons, 1929; p. 73
632:(74 O.G., 653). United States Patent Office (1897).
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twice in 1890 and 1896. He invented the three-wire (
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159:FRS, (27 July 1849 – 27 August 1898) was a British
296:capacity and residual charge. In 1878 he moved to
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313:series-parallel method of electric motor control
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183:in 1882. He also worked in many areas of
16:British physicist and electrical engineer
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482:Oxford Dictionary of National Biography
249:, having placed first in the demanding
241:in Manchester. He won a scholarship to
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720:. London: Farmer & Sons, printers
284:in recognition of his application of
775:Alumni of Trinity College, Cambridge
712:Hopkinson, Mary & Ewing, Irene,
199:, where he was also director of the
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805:Academics of King's College London
780:Alumni of the University of London
718:John and Alice Hopkinson 1824-1910
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697:The Book of Manchester and Salford
651:"The Unfortunate Hopkinson Family"
602:Great Britain Patent 2989 of 1881.
280:. In 1877 Hopkinson was elected a
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395:Victoria University of Manchester
245:in 1867 and graduated in 1871 as
19:For the priest (his nephew), see
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251:Cambridge Mathematical Tripos
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655:Mr Boyd's Glacier Adventures
499:"Hopkinson, John (HPKN867J)"
344:Memorial plaque at Cambridge
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815:Sport deaths in Switzerland
503:A Cambridge Alumni Database
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408:in 1912) are buried in the
282:Fellow of the Royal Society
274:Chance Brothers and Company
221:John Hopkinson was born in
169:Fellow of the Royal Society
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770:Scientists from Manchester
505:. University of Cambridge.
431:Three-phase electric power
319:against American inventor
272:engineering department of
243:Trinity College, Cambridge
113:Three-phase electric power
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745:John Hopkinson Biography
675:John Hopkinson biography
541:10.1049/jste-3.1884.0048
390:for English Literature.
383:is named in his honour.
336:Personal life and legacy
373:University of Cambridge
317:interference proceeding
21:John Hopkinson (priest)
581:10.1098/rsta.1889.0014
554:Hopkinson, J. (1889).
458:, his younger brothers
350:Petite Dent de Veisivi
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213:, is named after him.
193:electrical engineering
145:electrical engineering
810:Mountaineering deaths
388:Wimbledon High School
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306:Hopkinson peak effect
229:. He was educated at
197:King's College London
171:and President of the
259:University of London
820:Royal Medal winners
630:Hopkinson v. Hunter
572:1889RSPTA.180..443H
227:mechanical engineer
165:electrical engineer
800:English physicists
785:English scientists
406:James Alfred Ewing
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201:Siemens Laboratory
446:Bertram Hopkinson
263:Cambridge Apostle
173:IEE (now the IET)
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131:Scientific career
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830:Hopkinson family
825:Senior Wranglers
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441:Rigid collectors
436:Polyphase system
377:Free School Lane
369:New Museums Site
325:US Patent Office
321:Rudolph M Hunter
290:electromagnetism
231:Queenwood School
185:electromagnetism
110:Hopkinson's test
103:Hopkinson effect
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74:(1898-08-27)
57:27 July 1849
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765:1898 deaths
760:1849 births
566:: 443–465.
414:Switzerland
362:Switzerland
177:three-phase
123:Royal Medal
91:Nationality
84:Switzerland
754:Categories
469:References
270:lighthouse
223:Manchester
61:Manchester
53:1849-07-27
613:US 385055
448:, his son
400:His sons
356:, in the
278:Smethwick
257:from the
235:Hampshire
211:Ohm's law
161:physicist
63:, England
420:See also
733:at the
660:7 April
568:Bibcode
402:Bertram
393:At the
371:of the
302:dynamos
286:Maxwell
141:physics
94:British
618:
588:
379:. The
298:London
181:patent
137:Fields
125:(1890)
119:Awards
590:90545
586:JSTOR
714:Lady
662:2023
638:1896
454:and
311:The
237:and
187:and
69:Died
47:Born
576:doi
564:180
537:doi
276:in
255:BSc
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Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
