US1239008A

US1239008A - Electromagnetic winding.

Info

Publication number: US1239008A
Application number: US84930114A
Authority: US
Inventors: Clark T Henderson
Original assignee: Cutler Hammer Manufacturing Co
Current assignee: Cutler Hammer Manufacturing Co
Priority date: 1914-07-06
Filing date: 1914-07-06
Publication date: 1917-09-04
Anticipated expiration: 1934-09-04

Description

C. T. HENDERSON.

ELECTROMAGNETIC WINDING. APPLICATION HLED mu 6. Min.

Pafented Sept. 4, 1917.

UNITED STATES PATENT OFFICE.

CLARK '1. HENDERSON, OF MILWAUKEE, WISCONSIN, ASSIGNOB TO THE CUTLER- W'EB MFG. 00., O! HILWAUKEE, WISCONSIN, A CORPORATION OF WISCONSIN.

ELECTROMAGNETIC WINDING.

flpccifloation of Letters Patent.

Patented Sept. 4, 1917.

Application filed July 6, 1914. Serial No. 849,801.

To all whom it may concern:

Be it known that I, CLARK T. HnmmnsoN, a citizen of the United States, residing at Milwaukee in the county of Milwaukee and State of isconsin, have invented new and useful Improvements in Electromagnetic Windings, ofwhich the following is a full, clear, concise, and exact description, reference being had to the accompan 'ng draw same and eliminate air pockets therein.

However, where the magnet is wound as afdresaid, it has been proven very dificult, if not impossible, to efi'ect thorough impregnation, due to the fact that the insulation completely prevents ingress of the impregnating material radially of the windmg, and furthermore, often laps over the ends of the winding to prevent axial ingress of the impregnating material.

This invention has among itsobjects to provide a winding of the aforesaid character which may be readily and thoroughly imp ated.

Various other objects and advantages of the invention will hereinafter appear.

For the purpose of more fully and clearly disclosing the nature and characteristic fee tures of the invention, one embodiment thereof has been illustrated in the accompanying drawing, in which,

Figure 1 is a perspective view of a magnet winding, partially in section; and,

Fig. 2 is an enlarged perspective vie of a portion of one of the sheets of insula ion emlployed in said winding.

eferring to Fig. 1, the same shows a magnet winding formed of an insulated conductor 1 wound helically in a plurality of layers with sheets 2 of insulation inte osed between the layers. The insulation,

ever, is, as best illustrated in Fig. 2, provided with perforations 3 of any preferred size and arrangement.

As will be understood the winding is formed by coiling the conductor 1 about a suitable core and inserting the sheets 2 of insulation during the winding process.

Also, for purposes well understood, the insulation employed is preferably of suflicient width to provide projecting marginal portions 4 at opposite ends of the winding and it is such marginal portions that have added to the difliculties of impregnation as above set forth. The pressure of the impregnating material against the winding has caused said marginal portions of the insulation to fold over, as indicated by dotted lines, thus tending to seal the winding further impregnation.

However, when the winding is constructed as above described, the same enables ingress of the impregnating material radially of the winding through the Berforations 3 in the sheets of insulation. f course, the

conductor in passing over the perforations tends to obstruct the same but said perforations may be readily so proportioned and arranged as to insure passages through each sheet of insulation at an adequate number of points. In practice it is desired to provide a minimum number of perforations and to provide perforations of minimum dimensions to preserve the usefulness of the insulation sheets.

A common method of impregnation consists in placing the winding to be imprege nated in an air tight receptacle, then evacuating said receptacle, pregnating material into said receptacle under a relatively high pressure. Thus, where the winding is penetrable both axially and radially as above described, it will be apparent that the same may thoroughly lmpregnated even though ingress of the impregnating material be re sisted at the ends of the winding, as aforesaid.

What I claim as new and desire to securethp'Letters' Patent is:

An electromagnetic win ing comprising a conductor wound helica y in layers and and then forcing nnbe readily and fierforate sheets of insulationinterpoaed bescribed my name in the; presence of two wittween adjacent leyera thereof, the perforanesses. tions of said sheets of insulation being erran ed to rovide passe es radially through CLARK HENDERSON 5 sai win g to fee tate impregnation Witnesses:

thereof. TERI-A BAs'r, In witness whereof, I have hereunto sub- L. A. Wuson.