Counterweight

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counterweight

[′kau̇nt·ər‚wāt]
(mechanical engineering)
A device which counterbalances the original load in elevators and skip and mine hoists, going up when the load goes down, so that the engine must only drive against the unbalanced load and overcome friction.
Any weight placed on a mechanism which is out of balance so as to maintain static equilibrium. Also known as counterbalance; counterpoise.

Counterweight

A heavy component used to counterbalance the weight of a movable element; connected either with a cable over a pulley as in elevators or at one end of a lever as in a bascule bridge.

Counterweight

 

(also, counterbalance, counterpoise), a weight used for the complete or partial balancing of forces and moments in machines or their parts. The installation of counterweights on rotating parts, such as crankshafts, can eliminate the harmful effects of centrifugal forces originating from off-center masses.

In metalcutting machine tools, hoists, deep-well plunger pumps, and similar machines with vertically or obliquely moving parts, counterweights reduce the drive power. In hoisting cranes, counterweights provide stability; the arm and weight of the crane’s counterweight are selected to balance the moment of the weight of the mechanisms and metal frame together with half of the moment of a rated load. Counterweights are usually made in the form of a set of pig-iron or concrete bars or slabs.

counterweight

1. A weight that just balances another weight.
2. In a theater stagehouse, a weight (usually of iron, sand, or shot) used to balance suspended scenery, or the like.
References in periodicals archive ?
Therefore, it is necessary to consider the influence of counterweight on the fundamental frequency of pre-stressed concrete beams.
Caption: As supplied by AstroPhysics, the 1100GTO includes a counterweight shaft and GTOCP4 control box, as well as 12-volt power cables and a CD containing the user manual, PEMPro, and PulseGuide software.
On average, load charts with maximum counterweight have improved by approximately 5% over its predecessor.
After counterweight rigging was first introduced to the United States in the Chicago Auditorium in 1889, it was adopted by the Chicago scenic studios and installed into masonic theaters as early as 1904.
Today, the only weights the company is interested in are counterweights, large gray iron components placed on material handling and construction vehicles to keep them from tipping over when they are tasked with lifting large quantities of material.
What surprised me was that J of Repair knew exactly how I had bent the counterweight extension arm without me telling him how!
Sliding along a rail attached to the ceiling was a cat-headed spider, controlled like a giant marionette by a system of cables and counterweights and moving on padded feet.
The lean team pulled the tower back using huge lead counterweights.
In a Winter 2000 cover story, Earth Island Journal revealed that many of the world's older jumbo jets carry large amounts of radioactive depleted uranium (DU) in the form of small, heavy counterweights hidden inside wingtips, tails and elevators.
The two individual counterweights are mounted onto a sled, which is mechanically linked to the back of the boom.
The UK Environment and Transport Minister has assured residents living in the area in which a Korean Air Boeing 747 crashed that they should not be concerned about the affect of the missing uranium counterweights.