The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 25, 1991
Filed:
Jun. 25, 1986
Paul E Faville, Renton, WA (US);
The Boeing Company, Seattle, WA (US);
Abstract
A machine for measuring the diameter of both step and standard refurbished twist drills using a laser micrometer is disclosed. The drill (23) to be measured is inserted, cutting end down, in a scroll chuck (21) until the tip of the drill impinges on a stop plate (209) mounted on the end of the arm (207) of a drill stop solenoid (205). A hysteresis brake (169) coupled to the scroll chuck restricts rotation of some chuck elements as other chuck elements are rotated to close the chuck jaws ( b 107). After the drill (23) is grasped by the jaws (107), the hysteresis brake drag is overcome and the drill (23) is rotated by the chuck while the laser beam (187) of a laser micrometer scans a section of the drill (23) to determine the diameter of the drill. After several scans, the scroll chuck (21) is raised, resulting in a different section of the drill (23) being measured by the laser micrometer. If the drill is a step drill (23 ), it is raised again. When the pilot section of the drill lies in the scan path of the laser micrometer another measurement is made. The information developed by the laser micrometer is used by a laser processor (243) to determine the acceptability of the drill.