US1450521A - Armature for dynamo-electric machines - Google Patents

Description

1 2 H m {U c A l B 5 m E m T D S d 6 A n F ARMATURE FOR DYNAMO ELECTRIC MACHINES Q wgyww Patented Apr. 3, 1923.

UNITED STATES 1,450,521 PATENT OFFICE.

ARTHUR STEINBAOH, OF CHICAGO, ILLINOIS, ASSIGNOR OF ONE-HALF T0 LEO PODGORSEK, OF CHICAGO, ILLINOIS.

ARMATURE FOR DYNAMIC-ELECTRIC MACHINES.

Application filed December 31, 1921. Serial No. 526,087.

To all whom it may concern:

Be it known that I, ARTHUR STEINBACH, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Armatures for Dynamo-Electric Machines, of which the following is a specification.

This invention relates to improvements in armatures for dynamo electric machines.

One of the objects of the invention is to make a sectional armature core with a coil on each section, so that the coils may be wound thereon conveniently by use of machinery, if preferred, before the sections are assembled.

Another object of the invention is to provide a sectional armature in which the sections may conveniently be separately taken from the assembled sections for repair or substitution.

Another object is to provide an improved section fastening means.

Another object is, generally, to improve armatures.

Other objects and advantages of the invention will readily appear from a consideration of the following description when taken in conjunction with the drawings, wherein Fig. 1 is a transverse section of the improved armature.

Fig. 2 is an axial section of the same.

In both views the same reference characters are employed to indicate similar parts.

In the embodiment shown each section 5 of the armature consists of a part of an armature core about each of which is wound a coil 6. Each section 5 is provided with a series of laminations of magnetically susceptible material, such as soft iron or steel, held together by a rod 7 and a nut 8 at one end, and a similar nut 9 at the other end. The rod 7 is preferably pointed at each end, as at 10, and the pointed ends project from the nuts 8 and 9 and they are held in and retained by a perforated disk 11. The disks, at each end of the armature, are substantially the same and are slidable on the armature shaft 12 and are connected to the shaft by a key or feather 13. The shaft is preferably threaded, as at 14:, at each end of the armature and a nut 15, at each end, holds the disks 11 firmly in contact with the nuts 8 and 9 and the ends 10 of the rod 7, thus providing means for rotatably driving the assembled sections of the armature and for separating them when required. The rods 7 are pointed at their ends, at 10, so that when the disks are pushed onto the rods the pointed ends 10 bring all of the armature sections 5 as closely together as may be, and centrally with respect to the shaft, until the wedge-shape portions 16 of the sections 5 are in magnetic contact one with the other so as to make magnetic continuity throughout the armature structure. The rods 7 do not cut the magnetic lines of force and, therefore, current is not induced in them because they are so far removed from the field magnets that are partially to surround the armature. I have, however, shown a coating of varnish, or the like, 17 on the rods 7 to prevent electrical contact thereof with the sections 5, and the disks 11 may, if desired, be made of non-conducting material, such as fiber or a condensation product, hard rubber or the like, which will be sufficiently strong to support the armature. 4

The coils 6 may be connected together in any suitable manner and will operate satisfactorily when connected in the same manner in which the coils of the Gramme ring are usually joined.

When the armature sections are assembled as shown in Fig. 1, and the disks 11 are applied to the ends of the rods 7, the taper on the ends of the rods will uniformly draw the disks into close intimate contact so that there will. be no lost motion or movement between the sections and the disks 11 will prevent the nuts 9 from becoming loose incident to the use of the armature as a. result of vibration produced by its rotation.

While I have herein described a single embodiment of my invention for the purpose of clear disclosure, it will be manifest to persons skilled in the art, that many changes may be made in the general arrangement and configuration of the parts within the scope of the appended claims.

Having described my invention what I claim as new and desire to secure by Letters Patent, is

1. An armature providing a shaft and having a core divided on radial lines into a plurality of sections; a rod having pointed ends extending thru each section and beyond the sections; a disk at each end having a perforation for each rod arranged so that said said sections are drawn inwardly towards the axis of the armature and means on the shaft to force the disks towards each other.

2. A sectional armature providing a shaft and having a core divided on substantially radial lines into a plurality of sections, each section composed of a plurality of laminae; a rod, pointed at both ends, extending thru respective sections with its ends projecting therebeyond at each end of the section; nuts on the rods to hold the laminae together; a disk slidable on the shaft overlying the nuts to prevent their rotation and having a perf0- ration for each rod, arranged so that all said sections are drawn inwardly into intimate contact when thedisks are in ultimate positions and nuts on the shaft to move the disks into and to hold them in positions.

In testimony whereof I hereunto subscribed my name ARTHU'RMSTE'INB'ACH.

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