Rail flaw detector mechanism
United States Patent 2189112

Inventors:
Jones, George L.
Perry, Walter M.
Lanty, Loren DE. J.
Publication Date:
02/06/1940
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Assignee:
SPERRY PROD INC
Primary Class:
324/217
Other Classes:
346/25
International Classes:
B61K9/10; B61K9/00