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arc of contact
arc of contact[¦ärk əv ′kän‚takt] (mechanical engineering) The angular distance over which a gear tooth travels while it is in contact with its mating tooth. Also known as arc of action. The angular distance a pulley travels while in contact with a belt or rope. arc of contact
arc of contact An obsolete term for the variable distance on the surface of the eyeball on which the bulbar muscles rest prior to inserting in the external scleral surface behind the cornea.arc of contact That portion of an extraocular muscle which wraps around the surface of the globe prior to the insertion of its tendon into the sclera. The point where the muscle first comes into contact with the globe is called the contact point. The arc of contact continually alters its length as the eye rotates. Syn. contact arc. |