US3299386A

US3299386A - Fastening device for windings of static electrical equipment

Info

Publication number: US3299386A
Application number: US303642A
Authority: US
Inventors: Vulliermet Marcel
Original assignee: Compagnie Generale dElectricite SA
Current assignee: Alcatel Lucent SAS
Priority date: 1962-08-21
Filing date: 1963-08-21
Publication date: 1967-01-17
Anticipated expiration: 1984-01-17
Also published as: ES290948A1; FR1338949A

Description

Jan. 17, 1967 M. VULLIERMET ,2 FASTENING DEVICE E03 WINDINGS OF STATIC ELECTRICAL EQUIPMENT Filed Aug. 21. 1963 FIG/1 /NV/V70R MARCH. VULL/ERMET United States Patent 6 Claims. (a. 336-197) This invention relates to transformers of the type which employ a core of magnetic material about which primary and secondary windings may be positioned in inductive relation to operate in a well-known manner and, more particularly, to such an apparatus which may be more conveniently assembled.

It is well known to those acquainted with this art that when the windings of a transformer are short-cirouited or heavy loads occur thus creating severe mechanical stresses within the transformer, the coils are caused to be separated in a direction normal to their faces and to overcome this various types of pressure-applying means have been utilized to tightly clamp the coils together.

Various types of structure have been proposed for use in assembling transformers and to thereby apply suitable pressure to the secondary and primary windings in order to maintain the transformer in its maximum working condition. However, heretofore no one has proposed the improved type of transformer disclosed herein wherein the coils of which may be assembled at one location and then later moved to another position where it may be placed over the laminated core.

Accordingly, the primary object of the invention is to provide an assembly providing a plurality of coils and a balancing means therefor which may be lowered over a perpendicularly disposed core.

Another object of the invention is to provide a pair of oscillatable perpendicularly disposed elements which extend upwardly from a support media which is adapted to mount a base member relative to a pressure applying means that is positioned above the coils.

A further object of the invention is to interpose adjusting means between the pressure applying means and the upper flat surface of said coils.

Other objects and advantages will become apparent from the following description taken in conjunction with the accompanying drawings, in which:

FIG. 1 is a partial side view of a transformer column with the magnetic core omitted, and

FIG. 2 is a top plan view of the transformer column showing the laminated core.

Turning now to the drawings, and more particularly to FIG. 1, there is shown at 10 the outermost of the plurality of coils which are positioned on a base member 11 with each of the plurality of coils being provided at its upper flat surface with annular ring-type means 12 and 13 (see FIG. 2) which are intended for a purpose that will become apparent as the description progresses.

Beneath the base member 11, and adapted to support the same, are a pair of spaced elements 14 (only one of which is visible in FIG. 1, these spaced elements being rigidly mounted relative to a platform or other type of support by upwardly projecting spa-cedly-arranged

bolts

15 and 16.

With further reference to FIG. 1, it will be noted that the spacedly-arranged elements 14, previously mentioned, are provided with apertures 17 of suitable configuration and complemental to 'ball joint or other spherical-type means 18 which are secured to the terminal end portion of bars 19 (only one of which is shown) that extends perpendicularly to the spaced element 14 and upwardly through the area defining the space 20 'between the core 21 and the inner of said coils which is positioned beneath the annular ring-type member 13 that is best shown in FIG. 2. Each of the perpendicularly-disposed bars 19 is provided at its upper free end with spherical or other balltype joint means 18 and is complemental to an opening 22 provided in the horizontally-disposed spacedly-arranged pressure-

applying means

23 and 24, this also being best shown in FIG. 2. Interposed between the lower surface of the pressure-applying means 23 and 24 and the annular ring-type means which are applied to the upper flat surfaces of each of the plurality of coils are positioned adjusting means as shown. The adjusting means may comprise turn buckles or any other suitable means of a similar type and these elements, as indicated at 25 and 26, may apply uniform pressure to the innermost ring positioned on the coil which surrounds the core 21 and the outermost adjusting means 27 and 28 are interposed between the pressure-

applying means

23 and 24 and the upper flat surface of the outer of said annular ring-type means which is positioned on top of the second of said plurality of coils.

In view of the foregoing, it will be apparent to those skilled in the art that it is possible to assemble the plurality of coils in a column, together with their fastening means, and thereafter lower it onto the laminated magnetic core, or in the alternative remove a column from about the core. Accordingly, with such an arrangement the-re is provided a unit which can be stored and manipulated so as to 'be mounted or dismounted from a magnetic circuit.

Although only one embodiment of the invention has been depicted and described, it will be apparent that this embodiment is illustrative in nature and that a number of modifications in the apparatus and variations in its end use may be effected without departing from the spirit or scope of the invention as defined in the appended claims.

I claim:

1. A unitary structure including concentric coils which subsequent to assembly of its component parts is arranged to have its inner coil surround a magnetic core to form a transformer, said structure comprising a pair of chord members extending substantially to the perimeter of the outer of said concentric coils, a base member provided with means defining a central perforation supported on said chord members and arranged to support said coils, a pair of ring means, one each of which is mounted on the coils, pressure applying means positioned above said coils and said ring means, a pair of bar means having upper and lower end portions, the lower end portion of each of the bar means being pivotally attached to said chord members and the upper end portions being pivotally attached to said pressure applying means, said pressure applying means exerting pressure on said ring means and said coils.

2. A unitary structure as claimed in claim 1, wherein the upper and lower end portions of said 'bar means inelude means to permit canting between the base member and the pressure applying means.

3. A unitary coil structure as claimed in claim 1, wherein said pressure applying means are in substantial parallelisrn.

4. A unitary coil structure as claimed in claim 1, wherein said pressure applying means include adjusting means, said last named means being interposed between said pressure applying means and said ring means.

5. A unitary structure as claimed in claim 1, wherein the upwardly extending bar means are positioned in spaced parallel arrangement.

6. A unitary structure as claimed in claim 1, wherein the bar means extending from the chord members to the 4 pressure applying means is positioned inside the inner coil.

References Cited by the Examiner UNITED STATES PATENTS 180,614 12/1954 Austria.

LARAMIE E. ASKIN, Primary Examiner;

D. J. BADER, T. I. KOZMA, Assistant Examiners.