Dating antique navy clocks

In 1675, the inventor of the pendulum clock, Christiaan Huygens, came up with a portable clock that used a balance wheel and a spring for regulation, but it was still not accurate enough to use for navigation.This invention, however, paved the way for pocket watches and wristwatches.Then, the longitudinal distance could be calculated comparing the time with that of the fixed location.

Both France’s Ferdinand Berthoud and Thomas Mudge came up with their own marine chronometers, but the device wasn’t perfected until 1780, when Brits Thomas Earnshaw and John Arnold patented a streamlined chronometer with a detached spring detent escapement.These are the most precise portable mechanical clocks ever made, losing around 0.1 second per day, and allowing navigators to determine their ship's position within 4,600 feet after sailing for a full month.Earnshaw and Arnold, fierce competitors, each made about 1,000 chronometers.At first, these new marine chronometers were so costly few ships’ captains could afford them.Negus and Joseph Eastman started developing their tandem wind movement in the late 1880s, and this invention was patented in 1893, a year before Boston went out of business.

Eastman took this concept and formed the Vermont Clock Company with George D.In particular, clocks that could mark the standard mariner’s watches were known as “ship’s bells clocks.” Seth Thomas Clock Company produced an early ship’s bell clock, which resembled a kitchen clock in a tin can or wood case; meanwhile, Tiffany Makers of New York crafted a limited number of high-quality ship’s bell clocks, but these were only available to members of the elite New York Yacht Club.At Boston Clock Company, formerly the Harvard Clock Company, John S.That’s how Greenwich Merdian became the international starting point for measuring time zones.In the United States, coiled springs were not easy to come by, so most clockmakers built weight-driven clocks until the early 19th century.But for the British Royal Navy, outfitting its fleet with chronometers became a priority by 1825, giving the United Kingdom a navigational advantage on the high seas.