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Broken (Missing) Drill Detection Disclosure Number: IPCOM000049556D
Original Publication Date: 1982-Jun-01
Included in the Prior Art Database: 2005-Feb-09

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Wray, TE [+details]


Disclosed herein is an arrangement for detecting broken (missing) drill bits in a multiple-bit drilling machine for printed circuit cards, by charging an electrical circuit as a result of an intact drill bit establishing and then breaking an electrical circuit to a conductive backing layer.