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:
Apr. 08, 1986
Filed:
Dec. 09, 1983
Giorgio Barrera, Leumann, IT;
Abstract
Apparatus for forming stator coils constituted by multi-lobed turns, for dynamo-electric machines, comprises a first circumferential series of forming elements located at equal distances from a central axis and equiangularly spaced from each other, and a second circumferential series of forming elements equiangularly located about the said central axis and intercalated between the forming elements of the first series. The forming elements of the second series are moveable radially relative to the said central axis between an outer position which is spaced from the central axis by a distance greater than the distance between the central axis and the forming elements of the first series, and an inner position which is spaced from the central axis by a distance less than the distance between the central axis and the elements of the first series. A copper wire is wound about the first circumferential series of forming elements to form a polygonal coil and the forming elements of the second series are moved radially inwardly against the sides of the polygonal coil so as to curve these sides towards the center of the coil. The forming elements of the first series are free to move radially towards the central axis as a result of the thrust exerted against the sides of the polygonal coil by the elements of the second series. Automatic operating devices are provided for clamping one end of the copper wire to one of the forming elements of the first series before the start of the winding operation and for cutting the copper wire at the end of the winding operation.