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.

Eccentric

Not having the same center or center line; departing or deviating from the conventional or established norm.

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.

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.

eccentric

[ek′sen·trik]
(science and technology)
Situated to one side with reference to a center.

eccentric

eccentric head and shaft
Not having the same center or center line.

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
References in periodicals archive ?
The comedian made two documentary series in the 1970s: In Search of the Great Eccentric and Eccentrics At Play.
Schulman proposes that in contrast, twentieth-century eccentrics at first may appear ordinary, much like Magritte's bowler-hatted figure.
In Weeks' large sample of eccentrics only one was obviously psychotic.
The result is a funny, touching and thought-provoking book, which will make you look at any eccentrics you may be acquainted with with a new appreciation.
Among the characters he considers to be true English eccentrics of the past is the late Lord Berners, a composer whose foibles numbered dying his pigeonsAAE feathers and feeding his horse buttered scones.
AMONG debates ongoing on the Gazette's online Livewire blog is Craig November's paean to eccentric rockers.
ECCENTRIC DRESSERS Rosie Oddie (left) and Paloma Gormley, the daughters of ornithologist Bill Oddie and artist Anthony Gormley feature in the May edition of Harper's Bazaar magazine
Fawlty Towers actress Prunella Scales, who has played a few eccentrics herself in the past, will be joined by a fellow actor, piano and flute for this unusual show.
But just when I think I'm getting it right, I spot an eccentric and pass quick judgment.
Seventeen-year-old Ben (Rupert Grint), dreading another boring summer with his mom, finds unexpected salvation in the eccentric Evie (Julie Walters) in ``Driving Lessons.
Nearly 40 years before Little Britain hit our television screens, Malcolm Williamson's series of operatic sketches, English Eccentrics, gave us a glimpse of some of the country's wackiest folk.
Its most obvious precursor was Dada--the eccentrics were known to disrupt plays with whistles and rattles--and it drew on native absurdist authors as well.