Title:
BRUSH WEAR INDICATOR
United States Patent 3523288
Inventors:
Thompson, Harris A.
Publication Date:
08/04/1970
Export Citation:
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Assignee:
Harris, Thompson A.
Primary Class:
340/648
Other Classes:
310/239, 310/245
International Classes:
G01R31/34; H01R39/58; G01R31/34; H01R39/00; (IPC1-7): G08B21/00; H01H1/36
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US Patent References:
3350617Positioning device for use on machine tools
3339098Commutator brush holder
2968284Electromechanical control device
2613258Protective signal device for automobiles




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