Hubert “Hub” Schlafly, a key developer of the device that came to be known as the teleprompter, died April 20 in Stamford, Conn., after a brief illness. He was 91. He won an Emmy Award for his contributions to the innovation, now commonplace in TV talkshows, news shows and awards shows.A funeral was held Tuesday in Greenwich. Schlafly was a friend of actor Fred Barton Jr., who wanted a way to remember his lines. Author Laurie Brown says Schlafly, Barton and business partner Irving Berlin Kahn developed it. It made its debut in 1950 on soap opera “The First Hundred Years.” Schlafly eventually became president of the TelePrompTer Corp. Herbert Hoover became the first politician to use the device in 1952.