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. 24, 1979
Filed:
Oct. 18, 1976
William H Stark, Fort Wayne, IN (US);
General Electric Company, Fort Wayne, IN (US);
Abstract
A shaft of selected material and of a given desired nominal diameter corresponding to nominal desired shaft extension diameter for a particular motor is cut and then treated with optional operations such as chamfering and washing; grinding; machining of flats; and phosphatizing to inhibit rust. A first accessory member is assembled in a predetermined position by heat shrinking on the shaft; and a rotor body is assembled with the shaft. A second accessory member is also assembled by heat shrinking. For ball bearing applications, concenntric journals are turned on accessory members for the inner races of bearings after the accessory members have been assembled with shaft. The inner races of ball bearings are lightly pressed onto the journals, and rotors, end frames, and stator are assembled. The concentric journals permit press fitting of ball bearings without substantially exceeding 0.0005 of an inch press fit and thus avoid damage to the bearings. Shaft portions are stressed and maintained in a stressed condition so as to increase the stiffness of the rotor system and thereby increase the rotor system resonant frequency. Aluminum collars that conform to the shaft surface are preferably used. These collars establish a more thorough and uniformly stressed condition of the shaft.