Henry P. Hall
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.
He then worked for close to forty years for the same company until his retirement from GenRad in 1993 as a staff scientist.
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.
please expand bio
Links
- IET Labs Application Note, Henry Hall: Father of the Digibridge
- US Patent 2872639, Henry P Hall, Electrical bridge and method. Filed Oct. 10, 1956; Granted Feb. 3, 1959 (describing the Orthonull feature)
- 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
- please extend list of patents
Instruments
| Instrument | Description | Literature link |
|---|---|---|
| 1206-B | Unit Amplifier | 1953-11 |
| 1212-P2 | One-Megacycle Filter | 1956-01 |
| 1232-P2 | Preamplifier | 1967-02 |
| 1265-A | Adjustable DC Power Supply | 1962-05 |
| 1417 | Four-Terminal Capaitance Standard | 1978 catalog |
| 1426 | Four-Terminal Capaitance Standard | 1968-01 |
| 1433 | Decade Resistors | 1968-11 |
| 1434 | Decade Resistors | 1965-10 |
| 1455 | Decade Voltage Dividers | 1967-04 |
| 1605 | Impedance Comparator | 1954-04 |
| 1608 | Impedance Bridge | 1962-03 |
| 1613-A | Capacitance Bridge | 1958-02 |
| 1617-A | Capacitance Bridge | 1966-06 |
| 1633 | Incremental Inductance Bridge | 1962-05 |
| 1644 | Megohm Bridge | 1964-07 |
| 1650-A | Impedance Bridge | 1959-03 |
| 1656 | Impedance Bridge | 1970-03 |
| 1862-C | Megohmmeter | 1963-07 |
| 1863-A | Megohmmeter | 1969-03 |
| 1864-A | Megohmmeter | 1969-03 |