squirrel cage

noun
1.
a cage containing a cylindrical framework that is rotated by a squirrel or other small animal running inside of it.
2.
any situation that seems to be endlessly without goal or achievement.

Origin:
1815–25

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World English Dictionary
squirrel cage
 
n
1.  a cage consisting of a cylindrical framework that is made to rotate by a small animal running inside the framework
2.  a repetitive purposeless task, way of life, etc
3.  electrical engineering Also called: squirrel-cage motor the rotor of an induction motor with a cylindrical winding having copper bars around the periphery parallel to the axis
4.  an electric fan with many long narrow blades arranged in parallel so as to form a cylinder about an axis around which they spin

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Dictionary.com's 21st Century Lexicon
Main Entry:  squirrel cage
Part of Speech:  n
Definition:  See hamster wheel
Dictionary.com's 21st Century Lexicon
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Example sentences
Therefore, in practice, external capacitor compensation is used to compensate a squirrel cage induction generator.
Use totally enclosed or general purpose squirrel cage motors.
Squirrel cage blowers shall not be used for exhausting hazardous fumes, vapors or gases.
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