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2. FRAM (brand) - Wikipedia

   en.wikipedia.org/wiki/FRAM_(brand)

   FRAM was founded by T. Edward Aldham and Frederick Franklin in 1932, to develop a replaceable oil filtering element. FRAM incorporated in 1934, averaging a production of 10 filters per day. In 1936, FRAM began its partnership with automotive manufacturers, becoming original equipment on the 1936 Studebaker.

3. Oil filter - Wikipedia

   en.wikipedia.org/wiki/Oil_filter

   Oil filter. An oil filter is a filter designed to remove contaminants from engine oil, transmission oil, lubricating oil, or hydraulic oil. Their chief use is in internal-combustion engines for motor vehicles (both on- and off-road ), powered aircraft, railway locomotives, ships and boats, and static engines such as generators and pumps.

4. Purolator Filters - Wikipedia

   en.wikipedia.org/wiki/Purolator_Filters

   History Foundation and early history A modern Purolator oil filter. The company was founded in 1923 as Motor Improvements, Incorporated in New York City. The company's Purolator (initially stylized PurOlator and sometimes Pur-O-Lator) oil filtration device, invented in 1922 by Ernest John Sweetland and George H. Greenhalgh, was standard equipment on early 1920s Chrysler automobiles after being ...

5. Wratten number - Wikipedia

   en.wikipedia.org/wiki/Wratten_number

   Wratten numbers are a labeling system for optical filters, usually for photographic use comprising a number sometimes followed by a letter. The number denotes the color of the filter, but is arbitrary and does not encode any information (the 80A–80D are blue, the next filters in numerical order, 81A–81EF, are orange); letters almost always ...

6. Fram (ship) - Wikipedia

   en.wikipedia.org/wiki/Fram_(ship)

   Fram ("Forward") is a ship that was used in expeditions of the Arctic and Antarctic regions by the Norwegian explorers Fridtjof Nansen, Otto Sverdrup, Oscar Wisting, and Roald Amundsen between 1893 and 1912. It was designed and built by the Scottish-Norwegian shipwright Colin Archer for Fridtjof Nansen's 1893 Arctic expedition in which the plan ...

7. Astronomical filter - Wikipedia

   en.wikipedia.org/wiki/Astronomical_filter

   Ultraviolet filters for protecting a camera from ultraviolet radiation. An astronomical filter is a telescope accessory consisting of an optical filter used by amateur astronomers to simply improve the details and contrast of celestial objects, either for viewing or for photography. Research astronomers, on the other hand, use various band-pass ...