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. 31, 1979
Filed:
Jul. 21, 1977
Hiroyuki Kamiya, Hitachi, JP;
Ken Takahashi, Ibaraki, JP;
Seiji Watanabe, Hitachi, JP;
Yasuyuki Wachi, Takahagi, JP;
Hitachi, Ltd., , JP;
Abstract
A field winding assembly for rotor in electric rotary machine which is to be mounted into a substantially rectangular open slot formed in the rotor and secured by a wedge disposed in the slot closer to its open side, wherein the field winding assembly comprises a conductor section to be mounted into the slot, and an insulator for insulating the conductor section from the slot walls and the wedge and composed of a lower U-shaped insulating member covering the sides of the conductor section adjacent to bottom and side walls of the slot and an upper U-shaped insulating member formed to cooperate with the lower U-shaped insulating member for completely surrounding the conductor section and to have a base side adjacent to the wedge when assembled in the slot. The upper U-shaped insulating portion which is flexible for lateral contraction and expansion of the upper insulating member whereby the stress imported to the upper U-shaped insulating member is absorbed by the flexible characteristic of that portion.