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词汇 pitch line
释义

Definition of pitch line in English:

pitch line

noun
Mechanics
  • An imaginary line (often a circle) passing through the teeth of one cogwheel, pinion, rack, etc., so as to touch the corresponding line in another, without sliding, when the two components are geared together.

Origin

Late 18th century; earliest use found in John Imison (d. 1788), clockmaker and printer.

Definition of pitch line in US English:

pitch line

noun
Mechanics
  • An imaginary line (often a circle) passing through the teeth of one cogwheel, pinion, rack, etc., so as to touch the corresponding line in another, without sliding, when the two components are geared together.

Origin

Late 18th century; earliest use found in John Imison (d. 1788), clockmaker and printer.

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