A spur rack has a planar pitch surface and straight teeth that are at right angles to the direction of motion.
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Famous quotes containing the words spur and/or rack:
“All real freedom springs from necessity, for it can be gained only through the exercise of the individual will, and that will can be roused to energetic action only by the force of necessity acting upon it from the outside to spur it to effort.”
—Anna C. Brackett (1836–1911)
“O, let him pass. He hates him
That would upon the rack of this tough world
Stretch him out longer.”
—William Shakespeare (1564–1616)