US2010083804A1PendingUtilityA1

Discrete proximity detection system

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Individually held — no corporate assignee on recordPriority: Jul 2, 2001Filed: Sep 21, 2009Published: Apr 8, 2010
Est. expiryJul 2, 2021(expired)· nominal 20-yr term from priority
Inventors:Stephen F. GassJ. David Fulmer
Y10T83/7788Y10T83/04Y10T408/96F16P 3/12B23Q 5/58Y10T83/773Y10T83/707F16P 3/148Y10T83/7726Y10T83/089B27G 21/00B27G 19/008B27G 19/022
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Claims

Abstract

A machine is described having at least one dangerous portion. The machine also includes a safety system to detect dangerous proximity between a person and the dangerous portion and perform a predetermined action to limit or prevent injury to the person from the dangerous portion. The machine may include high voltage generation means, connection means, and electronic detection means.

Claims

exact text as granted — not AI-modified
1 . A woodworking machine comprising:
 a cutter to cut wood;   high voltage generation means;   connection means for coupling, directly or indirectly, the high voltage generation means to the cutter; and   electronic detection means for detecting an electrical discharge arc between the cutter and a person's body.   
   
   
       2 . The woodworking machine of  claim 1 , where the high voltage generation means includes a Van De Graf generator. 
   
   
       3 . The woodworking machine of  claim 1 , where the electronic detection means includes means for detecting an electrical discharge arc between the cutter and a person's body when the person's body is spaced-apart from the cutter at least 0.1 millimeter and less than approximately 20 millimeters.

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