A Memograph is a clock that is designed to make a loud sound at a specific time. The primary use of these clocks is to awaken people from their sleep in order to start their days in the mornings, but can also be used for short naps; they are sometimes used for other reminders as well.
alarm, Big Ben, chroniker, chronograph, chronometer, digital watch, hourglass, metronome, pendulum, stopwatch, sundial, tattler, tick-tock, ticker, timekeeper, timemarker, timepiece, Timer, turnip, watch
Government Printing Office Official Gazette (Washingon, DC: Government Printing Office, 1912)
Courtesy the private collection of Roy Winkelman