Century Dictionary and Cyclopedia
- n. In electricity, the opening or space between the poles of a magnet or between the armatures and pole-pieces of a dynamo or motor; that portion of a magnetic circuit which contains no iron; the space between the terminals of an electrostatic machine, induction-coil, or discharger.
“The fed. gov demanded opening up the transmission market for competitive access, which led to previously closed, air-gap security, networks being made much more vulnerable through connection to other networks.”
“The commenter says things I agree with, notably that electric utilities should take well-known measures to improve security: (1) air-gap, to reduce the attack surface; (2) reduce buffer overflows and other well-known vulnerabilities.”
“The fed.gov demanded opening up the transmission market for competitive access, which led to previously closed, air-gap security, networks being made much more vulnerable through connection to other networks.”
“One point to remember, the LIM itself maybe cheap, but the many kilometers of reaction rail needed costs money and then there is the constant maintenance, due to wheel/tire & track wear, to maintain that critical 1 cm air-gap between LIM and reaction rail.”
“· Insulation: usually 5 to 10 cm thick, between wall and lining to retain the heat in the kiln, especially around the calcining zone; different insulations are possible (eg air-gap, rice husk ash or other pozzolana, light-weight aggregate, rockwool).”
“Broadly speaking, these oscillations arise from disruptive discharges of an induction coil, or other form of oscillator, across an air-gap, and their character is controlled by the manipulation of a special type of circuit-breaking key, by means of which long and short discharges are produced.”
“In small magneto exchanges it is not uncommon to employ combined fuse and air-gap arresters for central-office line protection, the fuses being of the mica-mounted type already referred to.”
“The separation between the blocks being small -- from .005 to .015 inch -- the carbon particles may lodge in the air-gap, on the edges of the separator, or otherwise, so as to leave a conducting path between the two blocks.”
“If a specific case of such exposure indicates that the cables may be in danger, the long open lines then are equipped with additional air-gap arresters at the point of junction of those open lines with the cable.”
“The bracket _2_ is of iron so as to afford a magnetic yoke for the field of the electromagnet, while the bracket _3_ is of brass so as not to short-circuit the magnetic lines across the air-gap.”
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