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Elmer Ambrose Sperry Sr. (October 12, 1860 – June 16, 1930) was an American inventor and entrepreneur, most famous for construction, two years after Hermann Anschütz-Kaempfe, of the gyrocompass and as founder of the Sperry Gyroscope Company. [3]
David Pearsall Bushnell (1913–2005) was an American entrepreneur who founded the Bushnell optics company in 1948. Bushnell made precision binoculars affordable to middle-class Americans for the first time through a strategy of importing from manufacturers who provided optics to his patented specifications.
The new range of Barr & Stroud binoculars are currently made in China (Nov. 2011) and distributed by Optical Vision Ltd. Bausch & Lomb (US) – has not made binoculars since 1976, when they licensed their name to Bushnell, Inc., who made binoculars under the Bausch & Lomb name until the license expired, and was not renewed, in 2005.
Ritchie thought they could be improved upon, and by 1860 had received a U.S. patent for the first successful and practicable liquid-filled marine compass suitable for general use, [10] [11] a development that has been described as the first major advance in compass technology in several hundred years. [12]
Bushnell Corporation is an American firm that specializes in sporting optics and outdoor products. It is based in Overland Park, Kansas and is a wholly-owned subsidiary of Vista Outdoor . Bushnell makes binoculars , telescopes , spotting scopes , riflescopes , red dot sights , GPS devices , laser rangefinders , game cameras , night-vision ...
Researchers discovered a 500-year-old compass in a hidden chamber in Frombork, Poland, possibly used by Copernicus, shedding light on his astronomical work.
As William Ainsworth Inc., production of the Pocket Transit continued; the same basic design remains in production today, in numerous versions and configurations.. In 1970, the company introduced the Brunton Cadet, a simplified evolution of the Pocket Transit incorporating a compass and clinometer, intended for use in training students in the fields of geology, forestry, mining, and surveying. [9]
He was included in the 1925 edition of Who's Who in American Aviation. Titterington and Brice Herbert Goldsborough founded the Pioneer Instrument Company in 1919. Titterington designed the Earth inductor compass in 1924.