angle of obliquity

variants: or angle of pressure

Definition of angle of obliquity 

: the angle that the line of pressure or of action of two gear teeth in contact makes with the tangent at the point of contact of the two pitch circles

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First Known Use of angle of obliquity

1852, in the meaning defined above

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The first known use of angle of obliquity was in 1852

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by force of circumstances

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