Date of Birth: 
About Lincoln Walsh
- 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 Brooks Electronics Inc.
- 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. His 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). In 1971, Martin Gersten founded Ohm Acoustics.
- 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.
- Former Ohm Chief Engineer, John Strohbeen further developed Walsh's concepts.
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