Apparatus and gauges for use in measuring the diameter of a buffed tire in relation to a particular matrix

DETAILED DESCRIPTION I claim: 1.
Apparatus for use in measuring the diameter of a tire of a particular nominal size that has been buffed and is to be provided with a predetermined thickness of uncured rubber applied by an extruder builder and then to be placed and cured in a particular matrix, said apparatus including a support including a mount on which said tire is held during testing, an arm connected to said support for movement into and out of engagement with the periphery of the tire along a path that is generally radial with respect to the axis of the tire on said mount, scale means, said scale means provided with a series of successive portions, each for a particular nominal tire diameter, and each portion provided with a series of successive sections all relating to the actual diameter of the buffed tire with the addition thereto of said predetermined thickness of uncured rubber to be cured in said matrix, one section establishing that the buffed tire diameter is such as to enable said predetermined thickness of uncured rubber to be added and the matrix used, another establishing that the diameter is such as to require a predetermined thicker layer of uncured rubber before the matrix can be used and another section establishing that the buffed tire should not be used with said matrix, scale indicator means, one of said means fixed with respect to said support and a connection between the other means and said arm operable to move said other means relative to said one means and when the arm is in engagement with the periphery of said tire providing an indication in the appropriate section of the appropriate portion of the scale means.
2.
The apparatus of claim 1 in which each portion of the scale means is divided to provide a plurality of series of corresponding sections, each series being for a tire the construction of which results in a degree of elasticity differing from that of a tire of another construction.
3.
The apparatus of claim 1 in which the mount of the suppport is rotatable