eccentric

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eccentric,

in mechanics, device for changing rotary to back-and-forth motion. A disk is mounted off center on a shaft. One flat, open, circular end of a rod fits around the edge of the disk; the other end is usually attached to a block that slides in a slot. As the shaft rotates the block slides back and forth, carrying along whatever is attached to it, e.g., a valve. The distance between the center of the shaft and the center of the disk is the eccentricity. The so-called throw may mean either the eccentricity or the distance the block moves, which is twice the eccentricity. Camscam,
mechanical device for converting a rotating motion into a reciprocating, or back-and-forth, motion, or for changing a simple motion into a complex one. A simple form of cam is a circular disk set eccentrically on a shaft in order to induce (when the shaft rotates) a rising
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 and crankscrank,
mechanical linkage consisting of a bar attached to a pivot at one of its ends in such a way that it is capable of rotating through a complete circle about the pivot.
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 perform the same function as the eccentric, which designers often prefer to the crank for short motions.
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Eccentric

Not having the same center or center line; departing or deviating from the conventional or established norm.
Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved

Eccentric

(religion, spiritualism, and occult)

In astronomy, eccentricity refers to an elliptical orbit, specifically to the extent to which the ellipse described by a celestial body’s orbit departs from a perfect circle, expressed by the ratio of the major to the minor axis.

The Astrology Book, Second Edition © 2003 Visible Ink Press®. All rights reserved.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Eccentric

 

in astronomy, an auxiliary circle in the geocentric system of the world, introduced by Hipparchus to represent the annual revolution of the sun around the earth through motion along a circle with constant angular velocity. The nonuniformity of the sun’s motion along the ecliptic was attributed to the fact

Figure 1

that the sun moved (uniformly) along the circumference of an eccentric, whose center C did not coincide with the earth T (see Figure 1).


Eccentric

 

a circular disk whose axis of rotation does not coincide with its geometric center. In cam mechanisms, an eccentric, acting upon a rod that moves in a straight line, communicates to the rod a harmonic motion such that the displacement of the rod is proportional to the cosine (or sine) of the eccentric’s rotation angle. In linkage, an eccentric acts as a crank, that is, as a link that makes a complete revolution around its axis of rotation. Such an application of an eccentric is efficient when the crank (its throw equal to the eccentricity of an eccentric) must be very short. Eccentrics are also used in lathe attachments to clamp details that are being machined.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

eccentric

[ek′sen·trik]
(science and technology)
Situated to one side with reference to a center.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

eccentric

eccentric head and shaft
Not having the same center or center line.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.

eccentric

1. situated away from the centre or the axis
2. not having a common centre
3. a device for converting rotary motion to reciprocating motion
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
References in periodicals archive ?
Experimental and analytical investigation of tubular links for eccentrically braced frames.
Two weeks later, the groups: LSLTEG, LSUTEG, and LSDTEG performed bout 2 exercises of eccentrically biased exercise at 80% of HRR for 45 min.
This workinvestigates the flow of an incompressible micropolar fluid between eccentrically placed disks.
These are intramedullary lesions, typically more centrally located than eccentrically, and are usually found in the metaphysis or diaphysis of long bones.
DUBAI Gelatos on the beach was all my mind could comprehend en route to BoHouse, the eccentrically eclectic artsy caf on The Walk at Jumeirah Beach Residence (JBR).
More properly (because the forms themselves did not exist prior to their meaningfulness) after initial forays into psychology and fiction, Truitt's longstanding interests in the experiences of time, space, and selfhood congealed into highly reduced yet eccentrically colored sculpture.
Utilizing a common, eccentrically actuated, central drive element, this uniplanar arrangement allows for near perfect primary balance, resulting in virtually zero mechanical vibration.
The big hitter, famous for eccentrically sporting a monocle and walking cane, helped pull in pounds 30,000 for the Newcastle United Foundation at a charity bash thrown in his honour.
(Abridged version, IBTAURIS, 14.99[pounds sterling]) Not only one of the greatest of all travel books, but an eccentrically lyrical masterpiece, too
David Forrester was the perfect example of the capacity of the academy to absorb and fully utilize the eccentrically brilliant, which indeed he was.
Therefore, the maximum values of spun concrete strains and at the same time of resisting compressive stresses in reinforcing steel bars of concentrically and eccentrically loaded columns may be defined, respectively, as:
Eccentrically arranged and loaded with tangential asides it is fairly daunting to attempt reading through the material systematically.