Patent ID: 9354032
Filing Date: 2016-05-31
CPC Classification: G01B

Claim Text:
1. Apparatus for measuring the angularity of a hole having an upper end, a lower end, and an inner surface within a work piece having a top surface comprising: a probe having an external shell with an upper and lower portion for inserting into a hole to be measured, the upper portion of the external shell of said probe having a tapered portion which contacts said inner surface of the hole at said upper end of the hole to be measured at an annular ring around said tapered portion of said probe, the lower portion of the external shell fitting within the hole to be measured; a center pin fitted within said external shell of said probe, said center pin when driven forward forcing said lower portion of said external shell of said probe to expand thereby contacting said inner surface of the hole at an annular ring around the lower portion of said external shell of said probe at said lower end of the hole, thereby fixing said probe within the hole to be measured; an indicator assembly connected to said probe, said indicator assembly having an arm in contact with the top surface of the work piece, said arm vertically displaceable as it is rotated around the outside of the hole to be measured; and an indicator dial operationally connected to said arm of said indicator assembly whereby said indicator dial displays any deviation in vertical displacement of said arm as said arm is rotated around the top surface of the work piece containing the hole to be measured, thereby indicating the normality of the hole.