Gauge for measuring the degree of alignment at the inner surfaces of two tubular members positioned end to end

Claim 1

In a gauge for measuring the degree of alignment of two tubular members positioned end to end in a spaced relationship, each tubular member including a side wall having inner and outer surfaces, said alignment being measured at the inner surfaces of said tubular member side walls, said gauge including parallel first and second bar members having mutually contacting side faces which extend longitudinally of the bar members, said first bar member being shiftable lengthwise relative to said second bar member over the contacting side faces thereof, said bar members having corresponding juxtaposed end parts, each end part being defined by a contact, the contact of said first bar member and the contact of said second bar member projecting oppositely of one another in the same plane, each contact including an edge face disposed at substantially a right angle to said side faces of the bar members, the improvement comprising a shoulder part carried by said first bar member spaced from the end part thereof, means for shifting said shoulder part along said first bar member toward and away From the contact edge face of the first bar member whereby, when said contacts are inserted between said two tubular members at the ends thereof, said first and second bar members can be slid over one another until the end face of one contact engages the side wall inner surface of one tubular member and the edge face of the other contact engages the side wall inner surface of the other tubular member with said shoulder part shifted into contact with the side wall outer surface of one of the tubular members, said degree of alignment being determined by the location of one edge face relative to the other edge face.