Ralph Beebe Blackman
{{Short description|American mathematician and engineer}}
{{Infobox scientist
| name = Ralph Beebe Blackman
| birth_date = {{birth date |1904|08|29}}
| birth_place =
| death_date = {{death date and age |1990|05|24 |1904|08|29}}
| death_place =
| fields = Applied mathematics
| workplaces = Bell Laboratories
| alma_mater = Caltech
| known_for = Blackman window {{break}} Blackman's theorem {{break}} Blackman-Tukey transformation
}}
Ralph Beebe Blackman (August 29, 1904 – May 24, 1990) was an American mathematician and engineer who was among the pioneers of the Information Age along with Claude E. Shannon, Hendrik Wade Bode, and John Tukey.
Blackman graduated from the California Institute of Technology in 1926 and started work at Bell Laboratories the same year. His early research were in the fields of hearing, acoustics and mechanical filters. Later he focused on applied mathematics, specifically linear networks and feedback amplifiers. Starting in 1940, Blackman worked on data smoothing for anti-aircraft fire control systems.
{{cite journal
|date= July 1963
|title= Contributors to this issue
|journal= Bell System Technical Journal
|volume= 42
|issue= 4
|pages= 1909–1934
|doi= 10.1002/j.1538-7305.1963.tb04055.x
|doi-access= free
}}
In 1963 Blackman was elected an IEEE Fellow.
{{cite news
|author=
|title= EEE Names Bell Labs, Fort men fellows
|url= http://209.212.22.88/data/rbr/1960-1969/1963/1963.12.31.pdf
|newspaper= Red Bank Register
|page = 8
|location= Red Bank, New Jersey
|date= December 31, 1963
|access-date= October 2, 2015
}}
Books
- {{cite book
|last1=Blackman
|first1=R. B.
|last2=Tukey
|first2=J. W.
|date= 1958
|title= The Measurement Of Power Spectra: From The Point Of View Of Communications Engineering
|location = New York
|publisher= Dover Publications
|pages = 190
|isbn= 978-1258425180
}}
- {{cite book
|last=Blackman
|first=R. B.
|date= 1965
|title= Linear data-smoothing and prediction in theory and practice
|location = Reading, Massachusetts
|publisher= Addison-Wesley
|pages = 182
|isbn= 978-0201006100
}}
Patents
- {{ cite patent
| country = US
| number = 3271565 A
| status = patent
| title = System for determining the orbital parameters of a terrestrial satellite
| pubdate = 6 September 1966
| gdate =
| fdate = 16 January 1962
| pridate = 16 January 1962
| inventor = Ralph B. Blackman
| invent1 = Ralph B. Blackman
| assign1 = Bell Telephone Laboratories Inc.
| class =
}}
- {{ cite patent
| country = US
| number = 2950863 A
| status = patent
| title = Apparatus for the solution of plane triangles
| pubdate = 30 August 1960
| gdate =
| fdate = 28 October 1943
| pridate = 28 October 1943
| inventor = Ralph B. Blackman
| invent1 = Ralph B. Blackman
| assign1 = Bell Telephone Laboratories Inc.
| class =
}}
- {{ cite patent
| country = US
| number = 2710720 A
| status = patent
| title = Artillery computer
| pubdate = 14 June 1955
| gdate =
| fdate = 28 October 1943
| pridate = 28 October 1943
| inventor = Ralph B. Blackman
| invent1 = Ralph B. Blackman
| assign1 = Bell Telephone Laboratories Inc.
| class =
}}
- {{ cite patent
| country = US
| number = 2476269 A
| status = patent
| title = Mechanical differentiator for smoothing target tracking data
| pubdate = 19 July 1949
| gdate =
| fdate = 20 August 1945
| pridate = 20 August 1945
| inventor = Ralph B. Blackman
| invent1 = Ralph B. Blackman
| assign1 = Bell Telephone Laboratories Inc.
| class =
}}
- {{ cite patent
| country = US
| number = 2270644 A
| status = patent
| title = Negative impedance circuits
| pubdate = 20 January 1942
| gdate =
| fdate = 18 March 1939
| pridate = 18 March 1939
| inventor = Ralph B. Blackman
| invent1 = Ralph B. Blackman
| assign1 = Bell Telephone Laboratories Inc.
| class =
}}
- {{ cite patent
| country = US
| number = 2231404 A
| status = patent
| title = Electromechanical wave filter
| pubdate = 11 February 1941
| gdate =
| fdate = 8 March 1939
| pridate = 8 March 1939
| inventor = Ralph B. Blackman
| invent1 = Ralph B. Blackman
| assign1 = Bell Telephone Laboratories Inc.
| class =
}}
- {{ cite patent
| country = US
| number = 2139220 A
| status = patent
| title = Electromechanical wave filter
| pubdate = 6 December 1938
| gdate =
| fdate = 25 April 1936
| pridate = 25 April 1936
| inventor = Ralph B. Blackman
| invent1 = Ralph B. Blackman
| invent2 = Emory Lakatos
| assign1 = Bell Telephone Laboratories Inc.
| class =
}}
- {{ cite patent
| country = US
| number = 2091250 A
| status = patent
| title = Wave filter
| pubdate = 31 August 1937
| gdate =
| fdate = 13 August 1935
| pridate = 13 August 1935
| inventor = Ralph B. Blackman
| invent1 = Ralph B. Blackman
| invent2 =
| assign1 = Bell Telephone Laboratories Inc.
| class =
}}
- {{ cite patent
| country = US
| number = 2086597 A
| status = patent
| title = Wave filter
| pubdate = 13 July 1937
| gdate =
| fdate = 20 April 1935
| pridate = 20 April 1935
| inventor = Ralph B. Blackman
| invent1 = Ralph B. Blackman
| invent2 =
| assign1 = Bell Telephone Laboratories Inc.
| class =
}}
References
{{Reflist}}
{{Authority control}}
{{DEFAULTSORT:Blackman, Ralph Beebe}}
Category:California Institute of Technology alumni
Category:Scientists at Bell Labs
Category:20th-century American engineers
Category:American electrical engineers
{{US-electrical-engineer-stub}}