Definitions
from The Century Dictionary.
- noun 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.
Etymologies
Sorry, no etymologies found.
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Examples
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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.
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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 Volokh Conspiracy » If you like the BP spill, you’ll love cyberwar 2010
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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.
Bombardier presentation to the Transport Action Group « Stephen Rees's blog 2010
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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 Volokh Conspiracy » If you like the BP spill, you’ll love cyberwar 2010
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· 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).
Chapter 4 1988
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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.
Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. George Patterson 1910
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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.
Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. George Patterson 1910
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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.
Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. George Patterson 1910
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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.
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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.
Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. George Patterson 1910
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