US Patent: 2,946,646
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| Machine Tool Cutting Time Indicator
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Patentees:
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| John L. Bower (exact or similar names) - Downey, Los Angeles County, CA |
| Thomas E. Curtis (exact or similar names) - Downey, Los Angeles County, CA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
May 20, 1954 |
| Granted: |
Jul. 26, 1960 |
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Joel Havens
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Description: |
| Claims:
This invention relates to machine tools for cutting metals and other conductive substances, and particularly to a device for measuring and recording the time during which the cutter of the machine is in actual contact with and cutting a conductive work piece.
In the course of investigation of the durability and longevity of machine tools and the efficiency of personnel operating said tools it becomes important to measure the length of service of the tool and, in particular, the cutting edge; and to record the history of operation of the tool, i.e., the intervals between cuts, the length of time per cut when the machine is actually cutting metal, and the time lost in set-up, insertion, and removal of the workpiece. It is of little value to know the time during which the spindle of the machine is rotating alone, or the time during which the cutter is in contact with the work piece. This invention contemplates provision of apparatus and circuitry for the measurement of the time during which the spindle, which carries the cutter or drilling apparatus, is rotating and is also in contact with the workpiece. |
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