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Method and apparatus for inspecting engine head valve retainer assemblies for missing keys

  • US 4,399,554 A
  • Filed: 08/21/1980
  • Issued: 08/16/1983
  • Est. Priority Date: 08/21/1980
  • Status: Expired due to Term
First Claim
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1. Apparatus for automatically inspecting a valve spring assembly of an engine head to determine whether both keys of the assembly are present, said apparatus comprising camera means, computer means for controlling said camera means to obtain a digitized image of the valve spring assembly, said computer means being programmed to locate the center of the assembly and to determine whether both keys of said assembly are present based on the intensity profile of the digitized image along the circumference of a circle of predetermined radius originating at said center.

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