{"id":"948a9428-cfb0-4d6d-8ae3-f669478eaebc","slug":"horace-william-heyman","name":"Horace William Heyman","bioBrief":"American electrical engineer (1912–1998) who founded Sevcon in 1961 to develop semiconductor-controlled rectifier (SCR) motor controllers for electric vehicles. Sevcon became a leading supplier of EV traction controllers and was later acquired by BorgWarner in 2017. Heyman held the foundational patents on SCR-based speed control for battery-electric and hybrid vehicles.","priorExits":null,"nationality":"American","verificationPosture":"verified","aliases":[],"sources":[{"url":"https://archive.org/stream/NewsUK1998UKEnglish/Sep%2009%201998%2C%20The%20Times%2C%20%2366302%2C%20UK%20%28en%29_djvu.txt","label":"The Times (London), Sept 9 1998 obituary","title":"Obituary — Allan Heyman / Sevcon founder"},{"url":"https://sace.itcampeche.edu.mx/browse/6P8053/HomePages/Sevcon%20Controller%20Wiring%20Diagram.pdf","label":"Sevcon company history","title":"Sevcon — Company formation and Heyman founder history"}],"reviewStatus":"reviewed","createdAt":"2026-08-09T14:26:10.547Z","updatedAt":"2026-08-11T19:20:53.741Z","educations":[],"companyRoles":[{"id":"286c11fe-1ea0-4a50-aeef-1f9afe723bcd","personId":"948a9428-cfb0-4d6d-8ae3-f669478eaebc","companyId":"35003524-b668-48d1-84e7-74d4f165b870","role":"founder","roleTitle":"Founder","startDate":null,"endDate":null,"currentRole":true,"roleBasis":null,"createdAt":"2026-08-09T14:26:11.027Z","company":{"slug":"sevcon","name":"Sevcon (BorgWarner)"}}],"boardRoles":[],"investorRoles":[],"foundings":[{"id":"02668b27-b65e-4f94-bd07-2c2cea9169b6","personId":"948a9428-cfb0-4d6d-8ae3-f669478eaebc","companyId":"35003524-b668-48d1-84e7-74d4f165b870","foundingDate":"1961-01-01T00:00:00.000Z","cofounderStatus":"sole","stillAtCompany":false,"createdAt":"2026-08-11T19:20:55.086Z","company":{"slug":"sevcon","name":"Sevcon (BorgWarner)"}}]}