Tooth profile sensing instrument

Claim 1

A tooth profile sensing instrument for an elongate toothed corrugation roll having a peripheral surface portion made of magnetically attractable material and provided with elongate teeth in which each tooth is formed by a piar of valleys, the corrugation roll being adapted to operate in meshed relationship with another corrugation roll, as the two corrugation rolls rotate and corrugate strip material which moves between the corrugation rolls, comprising: a sled, the sled including an elongate body, a pair of parallel spaced-apart elongate slide runners attached to the elongate body and extending therefrom, the elongate slide runners establishing a pair of substantially parallel planes extending downwardly from the elongate body, the elongate slide runners being adapted to be positioned within spaced-apart valleys of a toothed corrugation roll, the elongate body of the sled being provided with a first opening therein which is positioned between the pair of slide runners, an annular sleeve fixedly positioned within the first opening and attached to the elongate body of the sled, a collar positioned within the sleeve and attached to the sleeve and rotatable with respect to the sleeve, a housing attached to the collar, a stem mounted within the collar and axially movable within the collar along a line substantially parallel to the planes of the slide runners, the stem having an engagement portion engageable with a tooth of a toothed roll as the slide runners are positioned within spaced-apart valleys of the toothed roll, an indicator member carried by the housing and operably joined to the stem for operation in accordance with axial movement of the stem, the elongate body of the sled also having a second opening therein between the slide runners, a magnet within the second opening and attached to elongate body of the sled and extending downwardly therefrom, wherein the sled is slidably movable along the elongate roll as the elongate slide runners are positioned within spaced-apart valleys of the elongate roll and as the elongate slide runners slide along the valleys and within the valleys, and wherein the magnet is attracted toward the magnetically attractable surface portion of the toothed roll and urges the sled toward the surface portion of the toothed roll, and as the engagement portion of the stem engages a tooth shich is positioned between the valleys and as the engagement portion of the stem slides along the tooth, as the profile of the tooth is sensed with axial movement of the stem as indicated by the indicator member.