Clarence L. Elder
engineer and inventor
A native of Georgia, Clarence Elder founded Elder Systems Incorporated, a research and development company located in Baltimore, Maryland. Elder developed Occustat, a monitoring and energy conservation system. Designed to reduce energy usage in buildings, Occustat works by using a light beam aimed across building and room entrances to monitor traffic and, thus, occupancy. When the building or room is empty, heating, cooling, and lighting controls are lowered, reducing energy consumption by as much as 30 percent. Occustat is in use in hotels and schools. Elder, a graduate of Morgan State College, has also received 12 additional patents in the United States and abroad.