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
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.
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

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 ?
Although circumstances of cross gap are many, but in this paper, two typical models of eccentric cross gap with two holes and one hole were chosen to study.
Table 1 below shows the bilateral PT results for both concentric and eccentric tests for the water polo players.
28) who compared quadriceps morphological and mechanical adaptation between eccentric training and conventional (concentric-eccentric) programs in the elderly during knee extensor and leg press exercises.
When we see a planet like this that is in an eccentric orbit, it can be really hard to try and explain how it got that way," Kane said in the statement.
HD 20782 has the most eccentric orbit known, measured at an eccentricity of .
An 'Ask the Experts' workshop then helped practitioners identify the best approach to support and motivate patients learning eccentric viewing and steady eye strategy.
In conjunction with their grand opening, Eccentric Living has launched social media campaigns on Instagram, Facebook, Twitter, and Pinterest.
Dave did a series on people who were eccentrics and granddad, who was known in the media as the Prophet of Meltham, was featured.
Subsequently, virtual evaluation of durability was made in the monitored points for whole variants--centric and eccentric load 100, 75 and 50%.
The patients picked an envelope containing a paper allocating the patient to either an eccentric or a concentric training regimen.
Prophylactic and therapeutic nutritional interventions involving protein, protein hydrolysate, mixed amino acids, selective amino acids, and branched-chain amino acids have been demonstrated to be effective in reducing some or all of the symptoms of muscle damage following isolated eccentric muscle actions [16,17,18], resistance exercise [19], downhill running [20], and endurance exercise [21].
From the point of view of physics, during the positive (rising/accelerating) or negative work (lowering/decelerating) (Asmussen 1953) some muscles are in eccentric mode.

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