1. the central portion of a wheel, propeller, fan, etc., through which the axle passes
2. Computing a device for connecting computers in a network
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.
the central part of a rotating component, such as a flywheel, pulley, or gear, with an opening used to mount the part on a shaft or axle. The opening usually has a keyway or splines to transmit torque. In cases where the component is designed to rotate freely on the axle, the hub opening is fitted with a pressed-in bushing or rolling-contact bearing. To ensure strength, hubs are usually designed with an outside diameter 1.5–1.8 times the diameter of the opening. To prevent misalignment of the component on the shaft, the thickness of the hub should be at least equal to the diameter of the opening.
The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
The core section of a building from which corridors extend.
An electric socket in a plugboard into which one may insert or connect leads or may plug wires.
The cylindrical central part of a wheel, propeller, or fan.
A piece in a lock that is turned by the knob spindle, causing the bolt to move.
A short coupling that joins plumbing pipes.
In surveying, a stake that marks the position of a theodolite.
A steel punch used in making a working die for a coin or medal.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
1. The core of a building usually containing one or more stairs and elevators, from which corridors radiate.
2. The part of a lock through which the spindle passes to actuate the mechanism.
3. A stake marking a theodolite position in surveying.
5. The thickened inner portion of a gear or wheel, i.e., the portion closest to the shaft.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
(By analogy with the hub of a wheel) A device
connected to several other devices.
, a hub is used to connect several computers
together. In a message handling service, a number of local
computers might exchange messages solely with a hub computer.
The hub would be responsible for exchanging messages with
other hubs and non-local computers.
This article is provided by FOLDOC - Free Online Dictionary of Computing (foldoc.org)
hub(1) See Web hub, digital media hub, intelligent hub and Surface Hub.
(2) In an Ethernet network, a hub is a central device to which all clients and servers are wired. Most Ethernet hubs are active and regenerate the data bits on the output side in order to maintain a strong signal. Ethernet hubs have mostly given way to Ethernet switches. See Ethernet, hub vs. switch and LAN.
(3) In a Token Ring network, a device to which all clients and servers are wired. The Token Ring hub is officially a "Multi-station Access Unit" (MAU). See Token Ring and LAN.
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