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:
Nov. 20, 1984
Filed:
Mar. 25, 1982
Curtiss G Howard, Manchester, CT (US);
Lester W Jordan, Cranston, RI (US);
Chester E Yaworsky, Glastonbury, CT (US);
Frank L Zampino, Enfield, CT (US);
United Technologies Corporation, Hartford, CT (US);
Abstract
When drilling very small diameter holes in workpieces, there is a great tendency for expulsed workpiece material to travel back along the electron beam path, and to deposit as debris within the interior of the gun. The debris is caused to mostly land at a recess in the rim of a rotatable interior shield, positioned adjacent the beam path inside the gun. The deflection angle of the electron beam is precisely adjusted so that the expulsed workpiece material lands in the recess, from when it is removed by a scraper. A tab is placed within the recess at the rim of the shield, and helps remove small amounts of deposit which still adhere to stationary parts of the electron beam gun system adjacent to the shield. In this embodiment, a resilient scraper such as a wire brush, is used to remove adhering debris from the rim of the shield.