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The following is a list of American companies that produced, or currently produce clocks. Where known, the location of the company and the dates of clock manufacture follow the name. Samuel Abbott; Montpelier, Vermont (1830–1861) Ansonia Clock Company; Ansonia, Connecticut and Brooklyn, New York (1851–1929)
During World War II, Westclox and other General Time Corporation subsidiaries produced aviation instrumentation and control components, compasses for the United States Army, and clocks for the United States Navy. Westclox became a major manufacturer of fuzes for military ordnance. Clocks for the civilian market stopped production in 1942.
The Hammond clock model "Como" The Hammond Clock Company was founded in 1928 to produce and market clocks that were equipped with Hammond's new motor. The Hammond clock factory manufactured more than 100 different clock models, some simple and cheap, others made from expensive materials such as marble and onyx. [4]
The next 3 decades saw the development of quartz clocks as precision time standards in laboratory settings; the bulky delicate counting electronics, built with vacuum tubes, limited their use elsewhere. In 1932 a quartz clock was able to measure tiny variations in the rotation rate of the Earth over periods as short as a few weeks. [39]
Electronic time clock. A time clock, sometimes known as a clock card machine, punch clock, or time recorder, is a device that records start and end times for hourly employees (or those on flexi-time) at a place of business. In mechanical time clocks, this was accomplished by inserting a heavy paper card, called a time card
Time systems that consisted of many clocks linked electrically to a master clock. The majority of the systems were installed in businesses, factories, banks, schools, and universities. Many railroads also relied on SWCC synchronized clock systems. Some clocks were sold as individual timepieces but most clocks were a part of time systems.
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