About: Lincoln Walsh

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Lincoln Walsh (November 3, 1903 – November 17, 1971) was an engineer and inventor. Walsh was educated at Stevens Institute of Technology, Columbia University and at Brooklyn College. After World War II, he founded During the war, he worked with Rudy Bozak at the Dinion Coil Company in Caledonia, New York, developing high voltage power supplies for radar use. Walsh worked as a member of the War Planning Board, where he met and later married Harriet Walsh. They were residents of Millington, New Jersey for many years. They had no children.

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rdfs:label	Lincoln Walsh (en)
rdfs:comment	Lincoln Walsh (November 3, 1903 – November 17, 1971) was an engineer and inventor. Walsh was educated at Stevens Institute of Technology, Columbia University and at Brooklyn College. After World War II, he founded During the war, he worked with Rudy Bozak at the Dinion Coil Company in Caledonia, New York, developing high voltage power supplies for radar use. Walsh worked as a member of the War Planning Board, where he met and later married Harriet Walsh. They were residents of Millington, New Jersey for many years. They had no children. (en)
dcterms:subject	1903 births Place of birth missing 1971 deaths 20th-century American inventors Brooklyn College alumni Columbia University alumni Stevens Institute of Technology alumni American consultants
Wikipage page ID	10442771 (xsd:integer)
Wikipage revision ID	1104425352 (xsd:integer)
Link from a Wikipage to another Wikipage	Rudy Bozak Bozak 1903 births Place of birth missing Colossus computer Columbia University Loudspeaker Stevens Institute of Technology Patent 1971 deaths 20th-century American inventors Brooklyn College alumni Columbia University alumni Brooklyn College Audio Engineering Society Stevens Institute of Technology alumni American consultants dbr:Brooks_Electronics_Inc. dbr:Ohm_Acoustics
Link from a Wikipage to an external page	http://www.ohmspeakers.com/ https://www.theaudiocritic.com/back_issues/The_Audio_Critic_29_r.pdf http://www.aes.org/aeshc/docs/jaes.obit/JAES_V20_1_PG080.pdf https://web.archive.org/web/20180506020339/http:/www.german-physiks.com/technology/the-ddd-driver.html
sameAs	Lincoln Walsh Lincoln Walsh Lincoln Walsh Lincoln Walsh
dbp:wikiPageUsesTemplate	dbt:More_citations_needed dbt:Reflist
has abstract	Lincoln Walsh (November 3, 1903 – November 17, 1971) was an engineer and inventor. Walsh was educated at Stevens Institute of Technology, Columbia University and at Brooklyn College. After World War II, he founded During the war, he worked with Rudy Bozak at the Dinion Coil Company in Caledonia, New York, developing high voltage power supplies for radar use. Walsh worked as a member of the War Planning Board, where he met and later married Harriet Walsh. They were residents of Millington, New Jersey for many years. They had no children. Walsh may have been involved in the development of the Kettledrum Baffle that one associates with the first Bozak speaker systems. He redesigned the "Mark II" (Colossus computer) power supply to prolong the unit's life. Later, he was a consultant on very large transformer designs for power distribution. He also developed a high-quality AM radio receiver and an aircraft collision avoidance system. Walsh´s interests extended to loudspeaker design. With the help of Bozak, he developed a direct-radiator design using a single speaker with an aluminum foil cone, operating out of a vertical column, and offering a wide frequency response. A Simple Quality Rating System for Loudspeakers and Audio Systems appeared in the Journal of the Audio Engineering Society for July, 1963. He went on to invent the wide-range coherent transmission-line loudspeaker, which was granted U.S. Patent 3,424,873 in 1969 (filed in 1964). Walsh realized that if you took an inverted cone and drove it from the apex, you could have a speaker with a perfect 360-degree horizontal radiation pattern available to reproduce all the audible frequency range. The vertical dispersion was controllable with the choice of materials. This offered a wide variety of designs, based on his patent. In 1971, Martin Gersten founded . Gersten raised the capital needed to buy back the Walsh patent rights from a metal-casting company which had invested with Walsh. Walsh's new speaker design was developed and marketed by Ohm (the Ohm 'A'), after Gersten invented an edge-wound anodized aluminum voice coil, U.S. Patent 3,935,402 (1974), which was needed to make the unit viable. Unfortunately, Walsh died before his speaker was released to the public. Ohm Chief Engineer, John Strohbeen, further developed Walsh's concepts. (en)
gold:hypernym	Engineer
prov:wasDerivedFrom	wikipedia-en:Lincoln_Walsh?oldid=1104425352&ns=0
page length (characters) of wiki page	3931 (xsd:nonNegativeInteger)
foaf:isPrimaryTopicOf	wikipedia-en:Lincoln_Walsh
is Link from a Wikipage to another Wikipage of	Rudy Bozak Lincoln (name) Loudspeaker
is foaf:primaryTopic of	wikipedia-en:Lincoln_Walsh

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