Dead Center


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Related to Dead Center: Top dead center

dead center

[¦ded ′sen·tər]
(mechanical engineering)
A position of a crank in which the turning force applied to it by the connecting rod is zero; occurs when the crank and rod are in a straight line.
A support for the work on a lathe which does not turn with the work.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Dead Center

 

the extreme position of a piston in the cylinder of a piston engine, at which the motion of the piston changes direction. The piston position at the greatest distance from the crank is known as top dead center, and the position closest to the crank is known as bottom dead center. When the piston is at dead center, its velocity is zero, and the forces acting upon it do not generate an impulse (momentum) for displacement of the crank. In theoretical mechanics the positions of the piston at dead center are sometimes called limit positions (points).

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
8): carrier dog (6); knurled dead center (7); driving plate or driving pins (8); chuck with two self-adjusting jaws (9); chuck with three self-adjusting jaws (10).
The title itself, Century Dead Center, possesses a number of interpretive possibilities, one being a reference to the Holocaust which occurred at midcentury, and another suggesting that the poems themselves examine, dead center, the point at which values, ethics, and history begin to unravel, leaving an epistemology that relies as much on the deconstruction of perception and reality as on the construction of it.
To establish some velocity parameters with Blackhorn 209 in the Strike, I selected Precision Rifle's 260-grain Dead Center sabots, only because I had a lot on hand.
Micro-adjustment knobs allow you to easily "click" your arrow placement into the dead center of the target, and the Sight Ring also offers protection for the .019-inch fiber-optic pins that feature the company's Center Core Pin Technology.
I found that when I duplicated their original torque I invariably "over timed", meaning the extensions went too far and actually passed top dead center.
An occasional pig, and not so occasional ram, would quiver and then settle back down without toppling, even when hit dead center with a full-house load with a 158-gr.
The 4-cycle, 4-cylinder engine of early Farmalls was set at the factory to provide current to the spark plug from 8 to 4 degrees before top dead center. A running engine rotates partially from kinetic energy derived from a revolving flywheel.
"If you could put your finger on the dead center of town that would be the spot," he said.
The Ikona tooth form is a patented non-involute profile consisting of a specifically matched external and internal tooth pair that provide maximum performance in the smallest size possible with no contact at top dead center. Instead, the company claims there is symmetrical contact on either side of the centerlines that allows zero backlash with no fear of jamming.
Many great moments in American art have taken us into the heat of competition; generally speaking, however, art that references the world of sports finds its niche at the dead center of mainstream culture, churned out by schlock mills, marketed in "starving artist" sales at airport motels, or, worse yet, sold in "theme art" galleries that specialize in ripping off their clientele with dubious merchandise and hard sell about "investment potential." While young artists (many of them still in graduate school) have recently shown a renewed interest in such "discredited" cultural byproducts as muscle cars and motorbikes, there's one old-timer who could still teach those pups some new tricks.
nails had found its way dead center into my fishing rod.