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.
The ODS Infinity continues to set the standard in switching hub technology and with the addition of Ethernet port switching and protocol analysis to the Infinity's existing workgroup switching capabilities - ODS now has the most versatile and powerful standards-based Ethernet solution in the industry," said Gaston.
0 Hub IP cores are hard to find, and we are happy to offer this differentiated and silicon-validated technology to a broader market.
This agreement emphasizes sour commitment to delivering a new LAN architecture with a broad base of support from existing hub vendors," remarked Terry Matthews, Newbridge chairman.
The newly added team will report to Thomas Mangan, president of HUB Northeast's Benefits Division.
4-port Wireless USB Switching Hub - utilizing SMSC's USB2524 USB MultiSwitch Hub and Staccato's single-chip, all-CMOS Ripcord SC3502P Wireless USB Device Wire Adapter solution, the Wireless USB Switching Hub enables peripheral sharing capability in a Device Wire Adaptor and provides both wired and wireless USB connectivity in a multi-host environment.
HUB will acquire the assets of Fortun Insurance (retail), ABCO Insurance (wholesale) and American Inspection Company, as well as the stock of ABCO Premium Finance (premium financing).
AssurConseil and its management team are well known and highly respected in our service area, which makes this acquisition attractive on several levels," said Andre Soucisse, president and chief executive officer of HUB Quebec.
INDIANAPOLIS -- This month, Indy Hub is celebrating its one year anniversary with a new launch of its Web site (www.
NASDAQ:ABXA) announced today an agreement with its major customer, DHL, that will reduce the range of services provided by ABX Air under the Hub and Line-haul Services Agreement (the "Hub Services Agreement") during 2006, and provides a framework for negotiating other potential terms in the Hub Services Agreement and the Aircraft, Crew, Maintenance and Insurance Agreement (the "ACMI Agreement").