A Dome clock has a base generally made in wood, brass, or tin-metal with a rounded top glass (or plastic in the cheap versions) dome or globe that protects the movement. John C. Briggs of Concord, New Hampshire, obtained a patent in 1855 for a conical pendulum and no escapement clock under a glass dome. The Kutnow Brothers in England invented in 1906 an electric clock with a battery whose pendulum was replaced by a large rotating pendulum with a spiral spring under a glass dome. Some precious French clocks have been sold with a protective glass dome. The famous German 400-day Anniversary clocks also have a glass dome like this Kundo from the 1950s.
