Henry P. Hall: Difference between revisions

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[[File:Henry P. Hall.jpg|thumb|150px|right|Henry P. Hall (1966)]]
[[File:Henry P. Hall 2004.jpg|thumb|250px|right|Henry P. Hall (2004)]]
'''Henry Parsons Hall''' (June 28, 1928 - July 17, 2023) graduated from Williams College in 1949 and MIT in 1952 before joining General Radio as a co-op student in 1949.
[[File:Henry P. Hall.jpg|thumb|250px|right|Henry P. Hall (1966)]]
{{Person
|Names=Henry Parsons Hall
|Birth date=June 28, 1928
|Birth place=East Orange, NJ
|Death date=July 17, 2023
|Death place=Fort Myers, FL
|Countries=USA
|Affiliations=Williams College, MIT, General Radio
|Wikidata id=
}}
earned a bachelor of arts from Williams College (Williamstown, MA) in 1949, and a bachelor of science and a master’s degree in electrical engineering (1952) from MIT.  


He then worked for close to forty years for the same company until his retirement from GenRad in 1993 as a staff scientist.
He joined General Radio as a co-op student in 1949, became a full-time development engineer in the GR impedance measurement group in 1952, advancing to group leader in 1964.
In 1969 he chose to focus on research, working as an engineering staff consultant.
He later became senior principal engineer and then senior staff scientist (1978), his title at retirement in 1992.


He is credited with the design of the [[Digibridge]] instrument and invented the [[Orthonull]] mechanism (see [[1650-A]]).
Among other achievements, he is credited with the design of the [[Digibridge]] instrument and invented the [[Orthonull]] mechanism (see [[1650-A]]).


Hall was a Life Fellow of the IEEE and one of only three General Radio Fellows.
Hall was a Life Fellow of the IEEE and one of only three General Radio Fellows. He was awarded the 2004 IEEE Joseph F. Keithley Award in Instrumentation and Measurement ''“for fundamental contributions to electrical measurements, with particular emphasis on the development of impedance bridges and standards, and the application of microprocessors to impedance measurement science.”''
 
''please expand bio''


==Links==
==Links==
* [https://www.ietlabs.com/pdf/application_notes/12-Henry%20Hall%20Digibridge%20Patent-Digibridge.pdf IET Labs Application Note, ''Henry Hall: Father of the Digibridge'']
* [https://www.ietlabs.com/pdf/application_notes/12-Henry%20Hall%20Digibridge%20Patent-Digibridge.pdf IET Labs Application Note, ''Henry Hall: Father of the Digibridge'']
* [https://www.ietlabs.com/pdf/GR_Experimenters/1962/GenRad_Experimenter_May_1962.pdf ''A New System for Measuring the Inductance of Iron-Core Coils''.  GenRad Experimenter Vol.36 No.5, May 1962] ([[1630-A]], [[1633-A]])
* [https://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=1304568 Henry Hall Awarded 2004 IEEE Joseph F. Keithley Award]
* [https://www.ietlabs.com/pdf/GR_Experimenters/1966/GenRad_Experimenter_June_1966.pdf ''The Measurement of Electrolytic Capacitors''. GenRad Experimenter Vol.40 No.6, June 1966] ([[1617-A]])
* [https://ethw.org/Henry_P._Hall Henry P. Hall biography] @ Engineering and Technology History Wiki
* [https://www.fortmyersmemorial.com/obituaries/Henry-Hall-14/#!/Obituary Henry Parsons Hall obituary]
* Henry P. Hall, ''A New System for Measuring the Inductance of Iron-Core Coils''.  [https://www.ietlabs.com/pdf/GR_Experimenters/1962/GenRad_Experimenter_May_1962.pdf GenRad Experimenter Vol.36 No.5, May 1962] ([[1630-AL]], [[1633-A]])
* Henry P. Hall, ''The Measurement of Electrolytic Capacitors''. [https://www.ietlabs.com/pdf/GR_Experimenters/1966/GenRad_Experimenter_June_1966.pdf GenRad Experimenter Vol.40 No.6, June 1966] ([[1617-A]])
* Henry P. Hall, ''A New Universal Impedance Bridge''. [[Media:General Radio Experimenter Vol.33 No.3 March 1959.pdf|General Radio Experimenter Volume 33, No. 3, March 1959]], page 3.
* Henry P. Hall, ''Orthonull - A Mechanical Device to Improve Bridge Balance Convergence''. [[Media:General Radio Experimenter Vol.33 No.4 April 1959.pdf|General Radio Experimenter Volume 33, No. 4, April 1959]], page 7.


==Patents==
==Patents==
* [https://patents.google.com/patent/US2872639A/en US Patent 2872639, Henry P Hall, ''Electrical bridge and method'']. Filed Oct. 10, 1956; Granted Feb. 3, 1959 (describing the Orthonull feature)
* [https://patents.google.com/patent/US2872639A/en US Patent 2872639, Henry P Hall, ''Electrical bridge and method'']. Filed Oct. 10, 1956; Granted Feb. 3, 1959 (describing the Orthonull feature)
* [https://patents.google.com/patent/US4342089A/en US Patent 4342089, Henry P Hall, ''Method of and apparatus for automatic measurement of circuit parameters with microprocessor calculation techniques''].  Filed Dec 12, 1979; Granted July 27, 1982
* [https://patents.google.com/patent/US4342089A/en US Patent 4342089, Henry P Hall, ''Method of and apparatus for automatic measurement of circuit parameters with microprocessor calculation techniques''].  Filed Dec 12, 1979; Granted July 27, 1982 (→ [[1657]])
* ''please extend list of patents''
* ''please extend list of patents''


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! Literature link
! Literature link
|-
|-
| [[1206-B]]  || Unit Amplifier                    || 1953-11
| [[1206-B]]  || Unit Amplifier                    || 1953-11 GE
|-
| [[1212-P2]]  || One-Megacycle Filter              || 1956-01 GE
|-
| [[1232-P2]]  || Preamplifier                      || 1967-02 GE
|-
| [[1265-A]]  || Adjustable DC Power Supply        || [[Media:General Radio Experimenter Vol.36 No.5 May 1962.pdf|1962-05 GE]]
|-
| [[1417]]    || Four-Terminal Capacitance Standard || {{Catalog 1978}}
|-
| [[1426]]    || Four-Terminal Capacitance Standard || 1968-01 GE
|-
| [[1433-B]]  || Decade Resistors                  || 1968-11 GE
|-
| [[1434-B]]  || Decade Resistors                  || 1965-10 GE
|-
| [[1455-B]]  || Decade Voltage Dividers            || 1967-04 GE
|-
|-
| [[1212-P2]] || One-Megacycle Filter               || 1956-01
| [[1605-A]]   || Impedance Comparator               || 1954-04 GE
|-
|-
| [[1232-P2]] || Preamplifier                      || 1967-02
| [[1608-A]]   || Impedance Bridge                  || 1962-03 GE
|-
|-
| [[1265-A]]  || Adjustable DC Power Supply        || [https://www.ietlabs.com/pdf/GR_Experimenters/1962/GenRad_Experimenter_May_1962.pdf 1962-05]
| [[1613-A]]  || Capacitance Bridge                || 1958-02 GE
|-
|-
| [[1417]]     || Four-Terminal Capacitance Standard || 1978 catalog
| [[1617-A]]   || Capacitance Bridge                || [[Media:General Radio Experimenter Vol.40 No.6 June 1966.pdf|1966-06 GE]]
|-
|-
| [[1426]]     || Four-Terminal Capacitance Standard || 1968-01
| [[1633-A]]   || Incremental Inductance Bridge      || 1962-05 GE
|-
|-
| [[1433]]     || Decade Resistors                  || 1968-11
| [[1644-A]]   || Megohm Bridge                      || 1964-07 GE
|-
|-
| [[1434]]     || Decade Resistors                   || 1965-10
| [[1650-A]]   || Impedance Bridge                   || [[Media:General Radio Experimenter Vol.33 No.3 March 1959.pdf|1959-03 GE]]
|-
|-
| [[1455]]    || Decade Voltage Dividers            || 1967-04
| [[1656]]    || Impedance Bridge                  || 1970-03 GE
|-
|-
| [[1605]]    || Impedance Comparator              || 1954-04
| [[1657]]    || Digibridge                        || 1976
|-
|-
| [[1608]]    || Impedance Bridge                  || 1962-03
| [[1658]]    || Digibridge                        || 1976
|-
|-
| [[1613-A]]   || Capacitance Bridge                 || 1958-02
| [[1666]]     || Resistance Bridge                 || 1972 Autumn GR Today
|-
|-
| [[1617-A]]   || Capacitance Bridge                || [https://www.ietlabs.com/pdf/GR_Experimenters/1966/GenRad_Experimenter_June_1966.pdf 1966-06]
| [[1685]]     || Digital Impedance Meter            || 1973
|-
|-
| [[1633]]     || Incremental Inductance Bridge      || 1962-05
| [[1686-A]]   || Digital Capacitance Meter          ||
|-
|-
| [[1644]]    || Megohm Bridge                      || 1964-07
| [[1687]]    || 1 MHz Digibridge                  ||
|-
|-
| [[1650-A]]   || Impedance Bridge                  || [https://archive.org/details/sim_general-radio-experimenter_1959-03_33_3 1959-03]
| [[1688]]     || Precision LC Digibridge            ||
|-
|-
| [[1656]]    || Impedance Bridge                  || 1970-03
| [[1689]]    || Precision Digibridge              ||
|-
|-
| [[1862-C]]  || Megohmmeter                        || 1963-07
| [[1862-C]]  || Megohmmeter                        || 1963-07 GE
|-
|-
| [[1863-A]]   || Megohmmeter                       || [https://www.ietlabs.com/pdf/GR_Experimenters/1969/GenRad_Experimenter_March-April_1969.pdf 1969-03]
| [[1863]]     || Megohmmeter (Inspection model)    || [[Media:General Radio Experimenter Vol.43 No.3+4 March-April 1969.pdf|1969-03/04 GE]]
|-
|-
| [[1864-A]]   || Megohmmeter                       || [https://www.ietlabs.com/pdf/GR_Experimenters/1969/GenRad_Experimenter_March-April_1969.pdf 1969-03]
| [[1864]]     || Megohmmeter (Laboratory model)    || [[Media:General Radio Experimenter Vol.43 No.3+4 March-April 1969.pdf|1969-03/04 GE]]
|-
|-
|}
|}


[[Category:General Radio people]]
[[Category:General Radio people]]

Latest revision as of 22:33, 24 April 2024

Henry P. Hall (2004)
Henry P. Hall (1966)

Henry Parsons Hall (b. June 28, 1928 in East Orange, NJ – d. July 17, 2023 in Fort Myers, FL) earned a bachelor of arts from Williams College (Williamstown, MA) in 1949, and a bachelor of science and a master’s degree in electrical engineering (1952) from MIT.

He joined General Radio as a co-op student in 1949, became a full-time development engineer in the GR impedance measurement group in 1952, advancing to group leader in 1964. In 1969 he chose to focus on research, working as an engineering staff consultant. He later became senior principal engineer and then senior staff scientist (1978), his title at retirement in 1992.

Among other achievements, he is credited with the design of the Digibridge instrument and invented the Orthonull mechanism (see 1650-A).

Hall was a Life Fellow of the IEEE and one of only three General Radio Fellows. He was awarded the 2004 IEEE Joseph F. Keithley Award in Instrumentation and Measurement “for fundamental contributions to electrical measurements, with particular emphasis on the development of impedance bridges and standards, and the application of microprocessors to impedance measurement science.”

Links

Patents

Instruments

Instrument Description Literature link
1206-B Unit Amplifier 1953-11 GE
1212-P2 One-Megacycle Filter 1956-01 GE
1232-P2 Preamplifier 1967-02 GE
1265-A Adjustable DC Power Supply 1962-05 GE
1417 Four-Terminal Capacitance Standard Catalog 1978
1426 Four-Terminal Capacitance Standard 1968-01 GE
1433-B Decade Resistors 1968-11 GE
1434-B Decade Resistors 1965-10 GE
1455-B Decade Voltage Dividers 1967-04 GE
1605-A Impedance Comparator 1954-04 GE
1608-A Impedance Bridge 1962-03 GE
1613-A Capacitance Bridge 1958-02 GE
1617-A Capacitance Bridge 1966-06 GE
1633-A Incremental Inductance Bridge 1962-05 GE
1644-A Megohm Bridge 1964-07 GE
1650-A Impedance Bridge 1959-03 GE
1656 Impedance Bridge 1970-03 GE
1657 Digibridge 1976
1658 Digibridge 1976
1666 Resistance Bridge 1972 Autumn GR Today
1685 Digital Impedance Meter 1973
1686-A Digital Capacitance Meter
1687 1 MHz Digibridge
1688 Precision LC Digibridge
1689 Precision Digibridge
1862-C Megohmmeter 1963-07 GE
1863 Megohmmeter (Inspection model) 1969-03/04 GE
1864 Megohmmeter (Laboratory model) 1969-03/04 GE
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