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An instrument that measures time in a precise manner.

Chronometer

An instrument that measures time in a precise manner.

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.

Memograph Clock

A Memograph is a clock that is designed to make a loud sound at a specific time. The primary use of…

A metronome is any device that produces a regulated aural, visual or tactile pulse to establish a steady tempo in the performance of music. It is a useful practice tool for musicians that dates back to the early 19th century.

Maezel's Metronome

A metronome is any device that produces a regulated aural, visual or tactile pulse to establish a steady…