Metal working – Method of mechanical manufacture – Electrical device making
Patent
1979-01-04
1981-02-03
Hall, Carl E.
Metal working
Method of mechanical manufacture
Electrical device making
29734, 493405, 310215, H02K 1510
Patent
active
042479789
ABSTRACT:
Methods are disclosed for making a slot liner for electrically insulating electric coils from a magnetic core. The slot liner comprises a piece of insulating sheet material having first and second sides and first and second ends. The sheet material is folded upon itself in opposite directions at each end thereof to establish end portions of double thickness. In other words, the sheet material is folded back upon itself at the first end to lie adjacent the first side thereof to form a first end portion of double thickness; and folded back upon itself at the second end to lie adjacent the second side thereof to form a second end portion of double thickness. The double thickness ends may be further folded upon themselves (but in a common direction) to establish cuffs. In other words, the first and second ends of the sheet material of double thickness may be folded back upon themselves toward the first side of the sheet material to form a cuff at each end. This approach permits the use of thinner (and therefore less expensive) insulating material than has been used heretofore, and yet avoids (or reduces) "cut through" problems at the faces of stator cores when the insulators are used in core slots. Preferred embodiments also facilitate axial insertion of slot liners along core slots, and axial insertion of windings along the previously placed slot liners.
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Machine Products Corp. photos and sketch furnished by applicant in parent case.
General Electric Company
Hall Carl E.
Krisher, Jr. Ralph E.
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