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:
Oct. 01, 1985
Filed:
Jun. 27, 1983
George Tihanyi, Montreal, CA;
Northern Telecom Limited, Montreal, CA;
Abstract
To obtain acceptable arc percussion welding of tin plated copper pins to thin brass strip members, the tin must be prevented from becoming trapped in the weld zone and gaseous and other forms of material also being trapped. By giving the end of a pin a smooth, hemispherical profile, the plasma arc is initiated at the center of the pin end and progressively moves radially outwards. This melts the tin plate layer and the tin is caused to flow radially outwards from the weld zone. The copper of the pin and brass of the strip then melt slightly and on impact welding is achieved. The outward flow of tin also assists in causing other undesirable elements being removed from the weld zone.