Profile gauging
AssigneeBritish Steel Corporation
InventorDavid A. Armstrong
Life of this patent
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Abstract
Apparatus for gauging surface profile of a workpiece comprises means for maintaining under tension an element which extends at least over the length of the surface to be gauged and which is effective to provide a reference surface against which the surface under test can be compared for gauging, a displacement transducer effective to produce a signal representative of the separation between the surfaces together with means adapted to support the transducer for traverse along the length of the surface to be gauged.
Claims22
Apparatus for gauging the surface profile of a workpiece comprising a reference element extending at least the length of the workpiece surface to be gauged and having a reference surface against which the surface under test can be compared, means for maintaining said element under tension in the direction of its length, together with a sensor assembly supported by a carriage means enabling the sensor assembly to move along said element, said sensor assembly incorporating a pair of relatively moveable probes, one of the probes being supported in a manner whereby it follows the surface profile of the workpiece surface under test when moved along same, and the other probe being supported in spaced relationship adjacent said reference surface and including a sensing means for sensing the electrical reactance between the sensing means and the reference surface, said other probe and sensing means moveable along said reference surface in spaced relationship with respect thereto, and means for moving said sensing means relative to said carriage means towards or away from said reference surface in response to the electrical reactance between the sensing means and the reference surface, whereby the sensing means and the reference surface can be maintained apart a predetermined distance while the sensor assembly is moved therealong.
Apparatus for gauging the surface profile of a workpiece comprising a reference element extending at least the length of the workpiece surface to be gauged and having a reference surface against which the surface under test can be compared, means for maintaining said element under tension in the direction of its length, together with a sensor assembly supported by a carriage means enabling the sensor assembly to move along said element, said sensor assembly including a support member and a pair of relatively moveable probes supported by said member, one of the probes being supported in a manner whereby it follows the surface profile of the workpiece surface under test when moved along same, and the other probe being entirely supported in spaced relationship adjacent said reference surface and including a sensing means for sensing the electrical reactance between the sensing means and the reference surface, said sensing means moveable with said other probe along said reference surface in spaced relationship with respect thereto, and means for moving said support member relative to said carriage means and relative to said reference surface to effect movement of said sensing means towards or away from said reference surface in response to the electrical reactance between the sensing means and the reference surface whereby the sensing means and the reference surface can be maintained apart a predetermined distance while the sensor assembly is moved therealong.
Dependencies are inferred from the claim text.