Abstract
The paper begins with a reference to the necessity of regarding inspection as part of the manufacturing programme. The provision of equipment for this purpose is just as important as the use of jigs and fixtures, and in all cases where “set-ups” would have to be made for inspection purposes, the provision of specially designed gauging fixtures is advised.
Some fundamental principles of such equipment are next discussed, the weak features in some and the advantages of adopting the good points of others being stressed. The use of the crossed-strip mounting, developed at the National Physical Laboratory, for indicating-arms is discussed, and the use of dial and signal indicators receives attention.
Descriptions are then given of varied applications to gauging apparatus for different components, each of which presents a problem in inspection. The possibility of utilizing the component itself, in such a way as to make it amplify variations in the feature being inspected, also receives some consideration. The multiple gauging of mass-produced components, using an ingenious indicator unit, concludes the descriptions of the practical applications.
In studying the examples, a mental comparison should be made with the problem which each case would present to the inspector, in the absence of the special equipment.
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