Core-spacing member for dynamo-electric machines.

Application filed August 31, 1906. Serial No. 332,773.

15, 1909.

Γο all whom it may concern:

.Be it known that I, Bernard A. Behrend cdizen of the United States, residing at Aorwoocl in the county of Hamilton and 5 >..tiite or Ohio, have invented certain new and useful Improvements in Core-Spacino· ...tcinbers for Dynamo-Electric Machines, of winch the following is a full, clear, and exact specification.

This invention relates to improvements in dynamo-electric machines and particularly IO spacing and ventilating members for lannnated cores of such machines.

The. object of the invention is the pro15 vision of core spacing- members which can be easily and cheaply manufactured, which arc strong mechanically and which will per-’ nut an ample ventilation or circulation of air regardless of the size of the core.

. In carrying out my invention. I employ tor each spacing member, instead’of a s'mo-le plate or casting, having all the spacing ribsor projections, two oppositely disposed plates, each carrying, part of'the spacing, proiec25 turns, the projections of one plate bearing on the other plate intermediate the projections of that plate. With this arrangement .iitd construction, the angular spacing or distance between the. adjacent projections earned by each plate is twice as great as in the ordinary constructions wherein single plates are employed.

-My/ invention may be further briefly summarizNl as consisting in certain novel’details 35 or construction, and combinations and arrangements. of parts which will be described m the specification and. set forth in the appended claims.

For a better understanding of my inven40 tion, reference is had to the accompanying drawings in .which— figure 1 is a partial longitudinal section or an armature core having spacing and ventilating members constructed and arranged 45 in accordance with one form, of ,my invention. Fig. 2 is a front elevation of one of the core spacing plates employed in the construction shown m Fig. 1. Fig. 3 is a plan new of a portion of the core showing the 50 arrangement, of the two cooperating plates of one.spacing member 'arid showing the staggered relation of the spacing ribs. Fig. 4 is a front elevation of a modified form of core, spacing phite. Fig. 5 is _a plan view «r a portion of a core showing a spacin»· 55 .member formed by plates having the com struct ion shown in Fig. 4. 1¾ (j a portion of a section of the core showing the two plates of the type.shown in Fig. 4 and showing the staggered or interlocking relation of 60 the spacing projections.

. Referring now to the figures of the drawing, 10 represents the shaft of the rotary member of a dynamo-electric machine, said shaft having mounted thereon a spider 11 65 and a core 12 built tip of lamina- which may be secured to the spider in any desired manner, preferably by dove-tail connections, and which are clamped between end heads or members· 13 at the ends of the spider. The 70 lamina- are . arranged in groups which are spaced apart by my improved spacing members so,as to form ventilating spaces n't intervals in the body of the core, which spaces communicate with transverse ventilatino- 75 spaces or passageways 14. ®

The spacing members constructed and άτι anged in accordance with my invention, each comprise a pair of oppositely disposed plates which in Figs. 1, 2, and 3 are desig- 80 nated 19, said plates having plain or smooth laces which abut against the end-laminae of the adjacent groups and on the adjacent faces, having spacing and ventilating projections, which, in the form of my invention .85 shown in I igs. 1, 2, .and 3, consist of radial libs 20. In the present ease, by way of example,.! have shown plates segmental in shape but .it. will be apparent that whether the plates are of the integral or segmental 90 type is immaterial to my invention. Each plate is provided with peripheral teeth 19^awhich are equal in number to the number of core teeth and register with the latter and the ribs 20 of each plate are located, in line 95 with alternate teeth and have, therefore, twice, the angular spacing “that they would have if arranged in line with all the teeth as in the usual constructions. When the laminae and plates 19 are assembled, the plates 100 are so arranged that the ribs 20 of each plate bearson the opposite plate intermediate the ribs of that plate, with the result that the ribs are staggered or project alternately from opposite plates. .The length of the 105 spacing ribs may, of course, be varied,' but ,271 .

extend entirely around the shaft or otherwise conform to the shape of the core.

I do. not desire to be confined to the exact 50 details shown but aim in my claims to cover all modifications which' do not involve a departure from the spirit and scope of my invention.