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Stephen Butterworth

Stephen ButterworthOBE (1885–1958) was a British physicist who invented the filter that bears his name, a class of electrical circuits that separates electrical signals of different frequencies.

Stephen Butterworth
Born11 August 1885 (1885-08-11)
Rochdale, Lancashire, England
Died28 October 1958(1958-10-28) (aged 73)

Contents

Stephen Butterworth was born on 11 August 1885 in Rochdale, Lancashire, England (a town located about 10 miles north of the city of Manchester). He was the son of Alexander Butterworth, a postman, and Elizabeth (maiden name Wynn). He was the second of four children. In 1904, he entered the Victoria University of Manchester, from which he received, in 1907, both a Bachelor of Science degree in physics (first class) and a teacher's certificate (first class). In 1908 he received a Master of Science degree in physics. For the next 11 years he was a physics lecturer at the Manchester Municipal College of Technology. He subsequently worked for several years at the National Physical Laboratory, where he did theoretical and experimental work for the determination of standards of electrical inductance. In 1921 he joined the Admiralty's Research Laboratory. Unfortunately, the classified nature of his work prohibited the publication of much of his research there. Nevertheless, it is known that he worked in a wide range of fields. For example, he determined the electromagnetic field around submarine cables carrying alternating current, and he investigated underwater explosions and the stability of torpedoes. In 1939, he was a "Principal Scientific Officer" at the Admiralty Research Laboratory in the Admiralty's Scientific Research and Experiment Department. During World War II, he investigated both magnetic mines and the degaussing of ships (as a means of protecting them from magnetic mines).

He was a first-rate applied mathematician. He often solved problems that others had regarded as insoluble. For his successes, he employed judicious approximations, penetrating physical insight, ingenious experiments, and skillful use of models. He was a quiet and unassuming man. Nevertheless, his knowledge and advice were widely sought and readily offered. He was respected by his colleagues and revered by his subordinates.

In 1942 he was awarded the Order of the British Empire. In 1945 he retired from the Admiralty Research Laboratory. He died on 28 October 1958 at his home in Cowes on the Isle of Wight, England at the age of 73.

  • S. Butterworth (December 1911) "On the vibration galvanometer and its application to inductance bridges," Proceedings of the Physical Society of London, vol. 24, pages 75–94.
  • S. Butterworth (December 1911) "A method of measuring small inductances," Proceedings of the Physical Society of London, vol. 24, pages 210–214.
  • S. Butterworth (December 1912) "On the evaluation of certain combinations of the Ber, Bei and allied functions," Proceedings of the Physical Society of London, vol. 25, pages 294–297.
  • S. Butterworth (December 1913) "On a null method of testing vibration galvanometers," Proceedings of the Physical Society of London, vol. 26, pages 264–273.
  • S. Butterworth (December 1914) "On the self-induction of solenoids of appreciable winding depths," Proceedings of the Physical Society of London, vol. 27, pages 371–383.
  • S. Butterworth (December 1914) "On electrically-maintained vibrations," Proceedings of the Physical Society of London, vol. 27, pages 410–424.
  • S. Butterworth (December 1919) "On the self-inductance of single-layer flat coils," Proceedings of the Physical Society of London, vol. 32, pages 31–37.
  • S. Butterworth (December 1919) "The maintenance of a vibrating system by means of a triode valve," Proceedings of the Physical Society of London, vol. 32, pages 345–360.
  • S. Butterworth (December 1920) "Capacity and eddy current effects in inductometers," Proceedings of the Physical Society of London, vol. 33, pages 312–354.
  • S. Butterworth (December 1921) "On the use of Anderson's bridge for the measurement of the variations of the capacity and effective resistance of a condenser with frequency" Proceedings of the Physical Society of London, vol. 34, pages 1–7.
  • S. Butterworth (December 1921) "Notes on Earth Capacity Effects in Alternating-Current Bridges," Proceedings of the Physical Society of London, vol. 34, pages 8–16.
  • S. Butterworth (1922) "III. Eddy-current losses in cylindrical conductors, with special applications to the alternating current resistances of short coils," Philosophical Transactions of the Royal Society of London, Series A, vol. 222, pages 57–100.
  • S. Butterworth (1924) "Note on the alternating current resistance of single layer coils," Physical Review, vol. 23, pages 752–755.
  • S. Butterworth (1924) "The distribution of the magnetic field and return current round a submarine cable carrying alternating current. Part 2," Philosophical Transactions of the Royal Society of London. Series A, vol. 224, pages 141–184.
  • S. Butterworth (1 April 1925) "On the alternating current resistance of solenoidal coils," Proceedings of the Royal Society of London. Series A, vol. 107, no. 744, pages 693–715.
  • S. Butterworth (July 1925) "The high-frequency copper losses in inductance coils", Experimental Wireless and the Wireless Engineer, vol. 2, no. 22, pages 613–616.
  • S. Butterworth, A. B. Wood, and E. H. Lakey (October 1926) "The use of a resonant shunt with an Einthoven string galvanometer," Journal of Scientific Instruments, vol. 4, no. 1, pages 8–18.
  • S. Butterworth (1926) "Effective resistance of inductance coils at radio frequencies," Experimental Wireless and the Wireless Engineer, vol. 3, pages 203, 267, 417 and 483.
  • S. Butterworth (1926) "Designing low-loss receiving coils," Wireless World, vol. 19, pages 754 and 811.
  • S. Butterworth (January 1929) "The high frequency resistance of toroidal coils," Experimental Wireless and the Wireless Engineer, vol. 6, pages 13–16.
  • S. Butterworth (November 1929) "Note on the apparent demodulation of a weak station by a stronger one," Experimental Wireless and the Wireless Engineer, vol. 6, no. 74, page 619.
  • S. Butterworth (1930) "On the theory of filter amplifiers," Experimental Wireless and the Wireless Engineer, vol. 7, pp. 536–541. Available: https://www.changpuak.ch/electronics/downloads/On_the_Theory_of_Filter_Amplifiers.pdf
  • S. Butterworth and F.D. Smith (1 March 1931) "The equivalent circuit of the magnetostriction oscillator," Proceedings of the Physical Society of London, vol. 43, no. 2, pages 166–185.
  • Stephen Butterworth and Leonard O. Cook, "Suspensions for deflectional instruments". British patent number: GB 433,080 (filed: 25 April 1934; published: 8 August 1935).
  1. Stephen Butterworth (1930) "On the theory of filter amplifiers," Experimental Wireless and the Wireless Engineer, vol.7, pp. 536–541.
  2. Register of marriages in England for April, May, and June 1882, page 40.
  3. The Butterworth children: Joseph A. (born: 1883), Stephen (born: 1885), Alice (born: 1887), and Benjamin (born: 1889). Reference: 1901 Census of England.
  4. Date of birth, father's name and occupation, and university education provided by: University of Manchester Archives, The John Rylands University Library, The University of Manchester
  5. S. Butterworth (1924) "The distribution of the magnetic field and return current round a submarine cable carrying alternating current. Part 2," Philosophical Transactions of the Royal Society of London. Series A, vol. 224, pages 141–184.
  6. Navy List, March 1939.
  7. Nature (1958), page 1707.
  8. Supplement to the London Gazette, 11 June 1942.
  9. http://www.numericana.com/answer/filter.htm#butterworth "(9 June 2007) Low-pass Butterworth filters"
  10. Brief obituary of Stephen Butterworth: "S. Butterworth," The Times (of London, England), 7 November 1958, page 15.
  11. H. F. Willis, Obituary: "Mr. Stephen Butterworth, O.B.E.," Nature, vol. 182, issue 4651, pages 1706–1707 (1958).

Stephen Butterworth
Stephen Butterworth Article Talk Language Watch Edit Stephen Butterworth OBE 1885 1958 was a British physicist who invented the filter that bears his name 1 a class of electrical circuits that separates electrical signals of different frequencies Stephen Butterworth OBEBorn11 August 1885 1885 08 11 Rochdale Lancashire EnglandDied28 October 1958 1958 10 28 aged 73 Cowes Isle of Wight England Contents 1 Biography 2 Publications 3 Patents 4 FootnotesBiography EditStephen Butterworth was born on 11 August 1885 in Rochdale Lancashire England a town located about 10 miles north of the city of Manchester He was the son of Alexander Butterworth a postman and Elizabeth maiden name Wynn 2 He was the second of four children 3 In 1904 he entered the Victoria University of Manchester from which he received in 1907 both a Bachelor of Science degree in physics first class and a teacher s certificate first class In 1908 he received a Master of Science degree in physics 4 For the next 11 years he was a physics lecturer at the Manchester Municipal College of Technology He subsequently worked for several years at the National Physical Laboratory where he did theoretical and experimental work for the determination of standards of electrical inductance In 1921 he joined the Admiralty s Research Laboratory Unfortunately the classified nature of his work prohibited the publication of much of his research there Nevertheless it is known that he worked in a wide range of fields For example he determined the electromagnetic field around submarine cables carrying alternating current 5 and he investigated underwater explosions and the stability of torpedoes In 1939 he was a Principal Scientific Officer at the Admiralty Research Laboratory in the Admiralty s Scientific Research and Experiment Department 6 During World War II he investigated both magnetic mines and the degaussing of ships as a means of protecting them from magnetic mines He was a first rate applied mathematician He often solved problems that others had regarded as insoluble For his successes he employed judicious approximations penetrating physical insight ingenious experiments and skillful use of models He was a quiet and unassuming man Nevertheless his knowledge and advice were widely sought and readily offered He was respected by his colleagues and revered by his subordinates 7 In 1942 he was awarded the Order of the British Empire 8 In 1945 he retired from the Admiralty Research Laboratory He died on 28 October 1958 at his home in Cowes on the Isle of Wight England at the age of 73 9 10 11 Publications EditS Butterworth December 1911 On the vibration galvanometer and its application to inductance bridges Proceedings of the Physical Society of London vol 24 pages 75 94 S Butterworth December 1911 A method of measuring small inductances Proceedings of the Physical Society of London vol 24 pages 210 214 S Butterworth December 1912 On the evaluation of certain combinations of the Ber Bei and allied functions Proceedings of the Physical Society of London vol 25 pages 294 297 S Butterworth December 1913 On a null method of testing vibration galvanometers Proceedings of the Physical Society of London vol 26 pages 264 273 S Butterworth December 1914 On the self induction of solenoids of appreciable winding depths Proceedings of the Physical Society of London vol 27 pages 371 383 S Butterworth December 1914 On electrically maintained vibrations Proceedings of the Physical Society of London vol 27 pages 410 424 S Butterworth December 1919 On the self inductance of single layer flat coils Proceedings of the Physical Society of London vol 32 pages 31 37 S Butterworth December 1919 The maintenance of a vibrating system by means of a triode valve Proceedings of the Physical Society of London vol 32 pages 345 360 S Butterworth December 1920 Capacity and eddy current effects in inductometers Proceedings of the Physical Society of London vol 33 pages 312 354 S Butterworth December 1921 On the use of Anderson s bridge for the measurement of the variations of the capacity and effective resistance of a condenser with frequency Proceedings of the Physical Society of London vol 34 pages 1 7 S Butterworth December 1921 Notes on Earth Capacity Effects in Alternating Current Bridges Proceedings of the Physical Society of London vol 34 pages 8 16 S Butterworth 1922 III Eddy current losses in cylindrical conductors with special applications to the alternating current resistances of short coils Philosophical Transactions of the Royal Society of London Series A vol 222 pages 57 100 S Butterworth 1924 Note on the alternating current resistance of single layer coils Physical Review vol 23 pages 752 755 S Butterworth 1924 The distribution of the magnetic field and return current round a submarine cable carrying alternating current Part 2 Philosophical Transactions of the Royal Society of London Series A vol 224 pages 141 184 S Butterworth 1 April 1925 On the alternating current resistance of solenoidal coils Proceedings of the Royal Society of London Series A vol 107 no 744 pages 693 715 S Butterworth July 1925 The high frequency copper losses in inductance coils Experimental Wireless and the Wireless Engineer vol 2 no 22 pages 613 616 S Butterworth A B Wood and E H Lakey October 1926 The use of a resonant shunt with an Einthoven string galvanometer Journal of Scientific Instruments vol 4 no 1 pages 8 18 S Butterworth 1926 Effective resistance of inductance coils at radio frequencies Experimental Wireless and the Wireless Engineer vol 3 pages 203 267 417 and 483 S Butterworth 1926 Designing low loss receiving coils Wireless World vol 19 pages 754 and 811 S Butterworth January 1929 The high frequency resistance of toroidal coils Experimental Wireless and the Wireless Engineer vol 6 pages 13 16 S Butterworth November 1929 Note on the apparent demodulation of a weak station by a stronger one Experimental Wireless and the Wireless Engineer vol 6 no 74 page 619 S Butterworth 1930 On the theory of filter amplifiers Experimental Wireless and the Wireless Engineer vol 7 pp 536 541 Available https www changpuak ch electronics downloads On the Theory of Filter Amplifiers pdf S Butterworth and F D Smith 1 March 1931 The equivalent circuit of the magnetostriction oscillator Proceedings of the Physical Society of London vol 43 no 2 pages 166 185 Patents EditStephen Butterworth and Leonard O Cook Suspensions for deflectional instruments British patent number GB 433 080 filed 25 April 1934 published 8 August 1935 Footnotes Edit Stephen Butterworth 1930 On the theory of filter amplifiers Experimental Wireless and the Wireless Engineer vol 7 pp 536 541 Register of marriages in England for April May and June 1882 page 40 The Butterworth children Joseph A born 1883 Stephen born 1885 Alice born 1887 and Benjamin born 1889 Reference 1901 Census of England Date of birth father s name and occupation and university education provided by University of Manchester Archives The John Rylands University Library The University of Manchester S Butterworth 1924 The distribution of the magnetic field and return current round a submarine cable carrying alternating current Part 2 Philosophical Transactions of the Royal Society of London Series A vol 224 pages 141 184 Navy List March 1939 Nature 1958 page 1707 Supplement to the London Gazette 11 June 1942 http www numericana com answer filter htm butterworth 9 June 2007 Low pass Butterworth filters Brief obituary of Stephen Butterworth S Butterworth The Times of London England 7 November 1958 page 15 H F Willis Obituary Mr Stephen Butterworth O B E Nature vol 182 issue 4651 pages 1706 1707 1958 Retrieved from https en wikipedia org w index php title Stephen Butterworth amp oldid 1048724516, wikipedia, wiki, book,

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