In the 1800's Abraham-Louis Breguet a famous horologist designed a clock that set the owner's pocket watch to time at night. He called it a pendules sympathiques.
In the top of the clock is a holder for a special pocket watch that was worn during the day. Once the watch was placed in the holder, at least an hour later, it would be set exactly to the time with the clock. His first models set the minute hand of the watch on the hour. This idea was used later in the first public time services, which used an electric current to centralize the minute hands of clocks in public places. In later versions of Breguet's pendules sympathiques also wound the watch and calculated how much it had lost or gained and altered the regulator accordingly to adjust it. Breguet's invention showed the primary principal of automation. This was ingenious for this period of time. When Breguet, a pioneer in design, developed new inventions it paved the way for others to expand on them with better and more advanced devices.
In 1814 the Prince Regent of England bought one, which is now in the Royal Collection.
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