Grace Voss Frederick (November 3, 1905 – January 16, 2009) was an American actress on the Broadway stage and on television when it was still an experimental medium. During the Great Depression, Voss shifted to photography to earn a living. She became a well-known portrait photographer and her work was featured in magazines like Life and Look. She transitioned from portraiture to television background and set designs in 1953 together with her husband Claude Frederick. Their work was shown on popular television shows of the period and featured in several movies. Because of the limits of technology, she invented a machine, known as the "Threeplex", which allowed still background photographs to simulate moving or time effects. The machine was donated to Brigham Young University after the coupl