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2. 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.

3. Savitzky–Golay filter - Wikipedia

   en.wikipedia.org/wiki/Savitzky–Golay_filter

   Savitzky–Golay filter. Animation showing smoothing being applied, passing through the data from left to right. The red line represents the local polynomial being used to fit a sub-set of the data. The smoothed values are shown as circles. A Savitzky–Golay filter is a digital filter that can be applied to a set of digital data points for the ...

4. 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 ...

5. 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 ...

6. Photonic integrated circuit - Wikipedia

   en.wikipedia.org/wiki/Photonic_integrated_circuit

   The range of devices required on a chip includes low loss interconnect waveguides, power splitters, optical amplifiers, optical modulators, filters, lasers and detectors. These devices require a variety of different materials and fabrication techniques making it difficult to realize all of them on a single chip. [citation needed]

7. Neutral-density filter - Wikipedia

   en.wikipedia.org/wiki/Neutral-density_filter

   A set of ND filters. In photography and optics, a neutral-density filter, or ND filter, is a filter that reduces or modifies the intensity of all wavelengths, or colors, of light equally, giving no changes in hue of color rendition. It can be a colorless (clear) or grey filter, and is denoted by Wratten number 96.

8. Interference fit - Wikipedia

   en.wikipedia.org/wiki/Interference_fit

   Tightness of fit. The tightness of fit is controlled by amount of interference; the allowance (planned difference from nominal size). Formulas exist to compute allowance that will result in various strengths of fit such as loose fit, light interference fit, and interference fit. The value of the allowance depends on which material is being used ...

9. Oil-filter wrench - Wikipedia

   en.wikipedia.org/wiki/Oil-filter_wrench

   Strap-type oil-filter wrench. A ratchet is used to turn it. Strap-type oil-filter wrench. This one has a handle built in. Socket-type oil-filter wrench. It fits over the end of the filter and is turned with a ratchet. It is made of stamped steel. An oil-filter wrench is a tool for removing spin-on type oil filters. Wrench