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BROKEN TOOL DETECTOR

  • US 3,728,919 A
  • Filed: 11/15/1971
  • Issued: 04/24/1973
  • Est. Priority Date: 11/15/1971
  • Status: Expired due to Term
First Claim
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1. In a machine tool for performing work on a workpiece, the combination of, a tool carrier reciprocable toward and away from the workpiece, a tool having a first end mountable on the carrier for movement therewith and having a second end for performing work on the workpiece when said carrier is reciprocated, a passageway formed in said tool and terminating adjacent the second end of the tool, means for pressurizing said passageway with air to a preselected pressure, and means responsive to changes in said pressure resulting from breakage of the tool and venting of the terminal end of the passageway to produce a signal indicating the breakage.

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