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In 1972, just two years after acquiring Chelsea Clock, Automation sold it to Bunker Ramo Corporation who, among many things, was the nation's largest producer of automotive clocks. In 1975, Chelsea began marketing its Ship's Bell and house strike (12-hour chime) movements with pendulum escapements in the popular banjo style. That same year, it ...
Thomas S. Negus (May 1, 1828 – March 17, 1894) was a 19th-century American businessman. He was well known for the manufacture and sale of maritime chronometers and nautical instruments in New York City under the name T.S. & J.D. Negus Company.
Lenzkirch Clock Co (Aktiengessellschaft fur Ukrenfabrikation) (1851-1929) factory operated by Junghans 1929-1932; Mauthe Clock Company (c1870 - 1976) Jakob Schlenker Grusen, Schwenningen (JSGUS/ISGUS) (1888–present) Johannes Schlenker, Schwenningen (1822-1883) then Schlenker and Kienzle (1883-1897) then Kienzle
A marine chronometer is a precision timepiece that is carried on a ship and employed in the determination of the ship's position by celestial navigation.It is used to determine longitude by comparing Greenwich Mean Time (GMT), and the time at the current location found from observations of celestial bodies.
The changing height of the mercury in the barometer was recorded on a continuously moving photosensitive surface. [5] By 1847, a sophisticated temperature-compensation mechanism was also employed. Ronalds’ barograph was utilised by the UK Meteorological Office for many years to assist in weather forecasting and the machines were supplied to ...
Barometer Clock (Boulle) by André-Charles Boulle is a late seventeenth-century French clock created out of ebony, turtle shell, brass, gilt bronze, and enamel. The clock case is decorated on all sides and was intended as either a centerpiece or for display on a mantel in front of a mirror. [1]