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:
Jul. 20, 1999
Filed:
May. 15, 1997
Gerhard Ziemek, Langenhagen, DE;
Alcatel, , FR;
Abstract
A method of producing an overhead contact wire for supplying power to electrically driven vehicles is proposed which comprises a copper-clad steel wire and a copper wire that is metallically joined to the copper-clad steel wire. The method includes the following steps: a) heating a steel wire to a temperature about 950.degree. C.; b) joining first and second metal band sections to a surface of the steel wire by means of rolling at a temperature of about 950.degree. C. under protective gas atmosphere to produce a combined element; c) reducing the cross-section of the combined element by at least 20%; d) heating a copper wire to a temperature about 950.degree. C.; e) joining the heated copper wire to the reduced diameter combined element in the area covered by the first band section by rolling at about 950.degree. C. under protective gas to produce a prepared wire; and f) reducing the cross-section of the prepared wire to produce an overhead contact wire.