hub


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hub

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

Hub

 

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.

hub

[həb]
(building construction)
The core section of a building from which corridors extend.
(computer science)
An electric socket in a plugboard into which one may insert or connect leads or may plug wires.
(design engineering)
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.
(engineering)
In surveying, a stake that marks the position of a theodolite.
(metallurgy)
A steel punch used in making a working die for a coin or medal.

hub

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.
4.See bell.
5. The thickened inner portion of a gear or wheel, i.e., the portion closest to the shaft.

hub

(networking)
(By analogy with the hub of a wheel) A device connected to several other devices.

In ARCnet, 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.

hub

(1) See Web hub, digital media hub and intelligent hub.

(2) In an Ethernet network, a device to which all clients and servers are wired. Most Ethernet hubs are active hubs 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. It is officially known as a "Multi-station Access Unit" (MAU). See Token Ring and LAN.


References in periodicals archive ?
Designing a data hub from scratch can be difficult, but there are out-of-the-box solutions that provide complete functionality.
The permanent World Trade Center Transportation Hub will feature seamless pedestrian connections to the World Financial Center and the Metropolitan Transportation Authority's proposed Fulton Street Transit Center.
Headquartered in Chicago, IL, Hub International Limited is a leading North American insurance brokerage that provides a broad array of property and casualty, reinsurance, life and health, employee benefits, investment and risk management products and services through offices located in the United States and Canada.
0 Hub IP cores are hard to find, and we are happy to offer this differentiated and silicon-validated technology to a broader market.
SMSC's USB MultiSwitch Hub (USB2524) is the industry's first USB solution that combines a USB Hi-Speed hub and switching functionality in a single device.
Indy Hub has also enlisted the help of talented volunteers to provide content for the Web site, including articles, reviews and other helpful information.
ABX Air and DHL will undertake negotiation of additional modifications to the Hub Services Agreement and the ACMI Agreement to create greater risk/reward metrics for performance under these agreements.
Our strategic alliance with Hub International will expand our access to product offerings, locations and expertise, enhancing our competitive position.
Alan Curtis, PhD, previously EBS chief executive officer, will lead the benefits practice of HUB Southwest in Colorado and will join Hub International's best practices group for employee benefits.
After numerous strategy sessions, the informal working group developed the Indy Hub concept as a way to holistically build a more attractive and vibrant young professional community.
We welcome a very talented team of employees and an attractive base of clients to Hub with this acquisition," said Martin P.