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Topics related to "insulators"

insulation
insulation , use of materials or devices to inhibit or prevent the conduction of heat or of electricity. Common heat insulators are, fur, feathers, fiberglass, cellulose fibers, stone, wood, and wool; all are poor conductors of heat. The use of asbestos , formerly a common insulating material, ha... Read more
Samuel Insull
Samuel Insull , 1859-1938, American public utilities financier, b. London. He arrived in the United States in 1881 and was employed by Thomas A. Edison as a private secretary. He later became prominent in the management of the Edison industrial holdings. By 1907 he overcame competing public utilit... Read more
feather
feather One of the skin appendages that makes up the plumage of birds. They are composed of the fibrous protein keratin, and provide insulation and enable flight. They are usually replaced at least once a year.... Read more
feather
feather One of the skin appendages that makes up the plumage of birds. They are composed of the fibrous protein keratin, and provide insulation and enable flight. They are usually replaced at least once a year.... Read more
dielectric
dielectric , material that does not conduct electricity readily, i.e., an insulator (see insulation ). A good dielectric should also have other properties: It must resist breakdown under high voltages; it should not itself draw appreciable power from the circuit; it must have reasonable physical st... Read more
semiconductor
semiconductor solid material whose electrical conductivity at room temperature is between that of a conductor and that of an insulator (see conduction ; insulation ). At high temperatures its conductivity approaches that of a metal, and at low temperatures it acts as an insulator. In a semiconduc... Read more
cable
cable originally wire cordage of great strength or heavy metal chain used for hauling, towing, supporting the roadway of a suspension bridge, or securing a large ship to its anchor or mooring. Today a cable often refers to a line used for the transmission of electrical signals. One type of electric... Read more
coal tar
coal tar product of the destructive distillation of bituminous coal. Coal tar can be distilled into many fractions to yield a number of useful organic products, including benzene, toluene, xylene, naphthalene, anthracene, and phenanthrene. These substances, called the coal-tar crudes, form the star... Read more
Leyden jar
Leyden jar , form of capacitor invented at the Univ. of Leiden in the 18th cent. It consists of a narrow-necked glass jar coated over part of its inner and outer surfaces with conductive metal foil; a conducting rod or wire passes through an insulating stopper in the neck of the jar and contacts t... Read more
polyethylene
polyethylene , widely used plastic . It is a polymer of ethylene , CH 2 [symbol]CH 2 , having the formula (-CH 2 -CH 2 -) n , and is produced at high pressures and temperatures in the presence of any one of several catalysts , depending on the desired properties for the finished product. Polyet... Read more

Encyclopedia entries related to "insulators"

Electrical Conductivity
Encyclopedia entry from: UXL Encyclopedia of Science ...are said to be nonconductors, or insulators. Wood, paper, and most plastics are common examples of insulators. Electrical Resistance Another way...electric current flows through the iron. Insulators have a very different structure...
SIC 3264 Porcelain Electrical Supplies
Encyclopedia entry from: Encyclopedia of American Industries ...manufacturers of porcelain electronic insulators, molded porcelain parts for electrical devices, other electrical insulators, ceramic electronic and electrical...manufactured in this industry are ideal insulators for electrical currents because...
insulation
Book article from: The Columbia Encyclopedia, Sixth Edition ...heat or of electricity. Common heat insulators are, fur, feathers, fiberglass...wrappings of fiberglass pulp. Since insulators prevent the flow of heat in either direction...ebonite is widely used. Some other insulators are paraffin, sulfur, resin, and...
Lithography
Encyclopedia entry from: The Gale Encyclopedia of Science ...semiconductor materials, and dielectric insulators, which are the “ ink...Thin films of various materials act as insulators between conductive material and the...of material, designed to allow the insulators or protective barriers to be applied...
Electric Conductor
Encyclopedia entry from: The Gale Encyclopedia of Science ...materials, such glass and air, are insulators . In metals, the atomic nuclei form...good conductor. Gases are usually good insulators. Yet when they become ionized under...aluminum. The conductors are supported on insulators, which are usually ceramic or porcelain...
conduction
Book article from: The Columbia Encyclopedia, Sixth Edition ...Especially poor conductors, such as asbestos, have been used as insulators to impede heat flow (see insulation ). Liquids and gases...rubber, are poor conductors and may be used as electrical insulators, or dielectrics . Increasing the cross-sectional area of...
Ceramics
Encyclopedia entry from: The Gale Encyclopedia of Science ...elements, though some are actually ionic salts, and others are insulators. These materials can be very complicated, as are, for example...heating elements, dielectric materials, semiconductors, insulators, transducers, lasers, hermetic seals, igniters aerospace...
Transistor
Encyclopedia entry from: The Gale Encyclopedia of Science ...characteristics. Crystals of Si and Ge are neither good electrical insulators nor good electrical conductors, but conduct electricity at...very low resistance to electric current) and nonmetallic insulators such as glass (which have a very high resistance to electric...
Dielectric Materials
Encyclopedia entry from: The Gale Encyclopedia of Science ...have very low conductivity. That is, they are electrical insulators through which an electrical current flows only with the greatest...substance. Liquid dielectrics are also employed as electrical insulators. For example, transformer oil is a natural or synthetic...
Electrical Resistance
Encyclopedia entry from: The Gale Encyclopedia of Science ...copper, will have low resistance compared to an identical object made of a poor conductor. Good insulators, such as rubber or glass insulators, have a high resistance. Resistance is measured in ohms ( Ω ) and is related to the current...

Dictionary entries related to "insulators"

glial cell
Book article from: A Dictionary of Zoology ...and their processes. Apparently, the role of glial cells is to act as mediators of normal neuronal metabolism and/or as insulators between neurones to prevent unwanted interactions. They may also be involved in the regeneration of damaged neurones.
semiconductor
Book article from: A Dictionary of Computing ...as silicon or germanium, whose electrical conductivity increases with temperature and is intermediate between metals and insulators. In pure semiconductors this effect is due to the thermal generation of equal numbers of negative charge carriers (electrons...
glyceride
Book article from: A Dictionary of Plant Sciences glyceride An ester formed from glycerol and between 1 and 3 fatty-acid molecules, respectively designated mono-, di-, or tri-glyceride. Glycerides serve variously as sources of energy, and triglycerides ( lipids ) also serve as thermal and mechanical insulators.
polychlorinated biphenyl
Book article from: A Dictionary of Ecology ...biphenyl ( PCB ) One of a range of compounds, first synthesized in 1881 and manufactured in 1929 and used mainly as liquid insulators in heavy-duty electrical transformers. They were detected in the environment in 1966 and associated with reduced reproduction...
Semiconductors
Dictionary entry from: Dictionary of American History SEMICONDUCTORS SEMICONDUCTORS are solid materials with a level of electrical conductivity between that of insulators and conductors. Beginning with semiconducting elements found in nature, such as silicon or germanium, scientists learned to...
Beccaria, Giambatista
Dictionary entry from: Complete Dictionary of Scientific Biography ...artificial electricity, summarize, extend, and modify Franklin ’ s system. The most successful extensions deal with insulators other than glass, from which Beccaria constructed parallel plate condensers whose relative powers he tried to estimate...

Related newspaper, magazine, and trade journal articles from HighBeam Research

Gurnee man passionate about insulators.(Neighbor)
Newspaper article from: Daily Herald (Arlington Heights, IL); 1/20/2010; 700+ words ; ...calls it a serious hobby. The Gurnee man collects insulators. Insulators? You know, those small porcelain things on the...Jaws really drop when they hear he has 40,000 insulators. Soller, 52, said his interest in insulators...
A tougher year for insulators: building slump puts damper on dollar volumes.(insulation)
Magazine article from: Roofing Siding Insulation; 12/1/2007; ; 700+ words ; ...the Industry Report, the number of insulators reporting a drop in dollar volume almost...last year. Forty-three percent of insulators saw their business drop off in 2007...higher than for roofers and siders. Insulators are also the least optimistic of the...
A new spin on cleaning subway insulators--cleaner is greener.(Maintenance Matters)
Magazine article from: Mass Transit; 11/1/2008; ; 700+ words ; Dirt on third rail insulators can cause serious problems, including...systems have tens of thousands of insulators in a variety of shapes, materials...it can burn. Although ceramic insulators do not burn, they become very hot...
The World Market for High Voltage Insulators & Bushings 2008 - 2015.
M2 Presswire; 6/19/2009; 700+ words ; ...The World Market for High Voltage Insulators & Bushings 2008 - 2015(C)1994...The World Market for High Voltage Insulators & Bushings 2008 - 2015" report...offering. Report covers High Voltage Insulators split into the following types: - Glass...
Research and Markets: The World Market for High Voltage Insulators & Bushings 2008 - 2015.
Business Wire; 6/19/2009; 616 words ; ...the "The World Market for High Voltage Insulators & Bushings 2008 - 2015" report to their offering. Report covers High Voltage Insulators split into the following types: * Glass Insulators * Ceramic Insulators * Composite Insulators...
Radiation processing of polymer insulators: a method for improving their properties and performance.
Magazine article from: Polymer Engineering and Science; 7/1/1996; ; 700+ words ; INTRODUCTION Rod-shaped polymer insulators are increasingly used in power engineering...traditional high-voltage porcelain and glass insulators, for electric apparatus and overhead...manufacture of seismically stable bus support insulators or contact circuit insulators for railways...
Passive means to detect hot trolley insulators
Magazine article from: Mining Engineering; 1/1/2000; ; 700+ words ; Abstract Faulty insulators on mine trolley/track haulageways...passive means to detect overheating insulators on direct current systems. The detector...approximately every 6 m (20 ft) from insulators that are anchored into the roof by...
PPC Insulators brings 29 jobs to Tiffin
Magazine article from: Toledo Business Journal; 4/1/2007; ; 700+ words ; PPC Insulators (PPC), a global manufacturer and distributor of porcelain insulators for the power and processing industries, is...the building that we will now lease." PPC Insulators' presence in Carey, Ohio dates back to 1894...
20,000 insulators and counting Professor has a passion for glass, porcelain objects.(Neighbor)
Newspaper article from: Daily Herald (Arlington Heights, IL); 5/10/2000; ; 700+ words ; ...Rick Soller is a collector of the insulators that sit on top of telephone, telegraph...of Lake County. "I had no idea what insulators were." She does now. Through the...glass, porcelain, wood and plastic insulators that he keeps in the basement of the...
Silicone rubber materials for high voltage transmission and distribution insulators.
Magazine article from: Rubber World; 6/1/2006; ; 700+ words ; Since the early 1970s, composite insulators have become increasingly recognized as an alternative to the traditional porcelain insulators and glass cap and pin insulators. The use of composite insulators has accelerated...