US822293A - Transformer. - Google Patents

Description

No. 822,293. PATENTED JUNE 5, 1906.

W. S. MOODY.

TRANSFORMER.

APPLICATION FILED NOV. 18, 1904.

Wit W555 #W/ZWTOP:

IVs/[fer 5. Mo oay,

Schenectady, county of Schenectady,

I UNITED srarns PATENT omen.

WALTER SLMOODY, OF SOHENECTADY, NEW YORK, ASSIGNOR TO GEN:

ERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK.

' TRANSFORMER.

To (1, whom it may cancer-n1.

Be it known that I, VVALIER S. MOODY, a citizen of the United States, residin at tate of New York, have invented certain new and. useful I m rovements in Transformers, of which the l hllowing is a specification.

In manufacturing transformers, particularly of large capacity, it is usually found advisable to provide for. more than a single ratio of transformation. The uncertainty as to the-exact voltage desirable in a particular installation, as wel as the desirability of having a certain flexibility in the ratio in order to correct for different drops of potential in supply systems,' are among thecauses which render it necessary, or at least desirable, to provide a transformer in which the ratio of transformationcan be varied.

With comparatively low voltages it is easy to provide for variations in-the ratio of transformation by the use of leads tapped into it fe-rentportions of the windings and brought out through the casein which-the transformer is run; Whendeahng with voltages which are now called high -say forty thou sand volts and upwardthe space occupied by the bushings and other insulation necessary to v ro'per y insulate the h gh-potential termlna leads whe'n' bringing them through the case of the transformer is so large that it; becomes impracticable'to brin out all ofthe necessary leads. It has thus eco'me essen tial, or at least desirable, to adopta-constl'ucrme tion in which the tapped leads terminate inside the transformer-case. With this construction it is only'necessary'to employ one set of leads passingjthrough the transformercase.

It is usually difficult to change the connec.. 'tions'a of; the" transformerleads the case with-the tap-leads w on the I have found.

through trar'is ormer is in its case.

. however, that if the transformer is secured directly to the cover'of its inclosingcase and the leads or terminals of; the -tr an sforme'r are passed through the case-cover the change connections may be readily made} after the cover is removed from' -the case cover and the transformer is moved bodilyout of the'casing. With. this construction. thetransfonner may be readily moved out of thecaseat any timewithout in any manner interfenngrwith the'coimections of theitfriiigs hisis. advantageousfor many L Specification of Letters Patent. I Application and November 18.1904. a rium. 233.25

assing Patented J'une 5.1 906.

, forming a part of this specification;

For a better understanding. of my nvent oses other than change of-connections, as it.

tion, however, reference ma "he had to the,

accompanying drawings an description? in which I haveillustrated and embodiment of my invention.

Of he. drawings, Figure 1 is an elevation with parts broken away and ii section, show ing a transformer constructed in accordance with my invention; and Fig. 2 is an elevation, partly in section, showing the construction of one of the transformer-leads:

Referring to the drawings, the transformer- .casing' is shown ascomprisingf' bodyportion 1, which may be formed out of sheet metal, and isusuall in the sha e oia flattened cyl index. The o'wer' end of the Body portion 1 is secured to a base 2,-usually formed of, cast ,metal. The upper-end of the body portion 1 base reinforcing-strap 3 secured. to it by riv. ate 4.- The casing-cover 5 ispreferably described one formed out of cast-iron-and closes the up or end of the casing, being normally secure. in

place by bolts 6 and cooperating lugs 7,- -c'ar' ried by the bodyportion 1 of the 'caserqoverfi.

The transhmler p p mprises'win 10 'and core 11. The core 11 is formed. o laminae; which are clamped between upper and lower end members 12 and 13, respectively, by threaded rods 14. In the coir-t.

struction illustrated the core is laminated-in horizontal planes. The rods 14- are tapped into threaded apertures formed for the-purpose into the lower member 13 and pass through apertures formed for the purpose ,in the u per end member 12/ The upper end of t e rods 14 are screwed into exteriorsillythreadpper.e11ds' of the cellars ornuts 15, @1

u per-ends of the rods which are also threadpa's's through and are secured to the casesewers by nuts 17.

: 371m high-potential terminal conductors 20 of the transformer pass through the cover,

heijn' insulated therefrom 'bysuitahle ins?" fs'ulaEmg bushings or memher 21, The lower end of each terminal conductor .20 is adapted to be interchangeably connected to one of a- .hoisting device, such as an overhead traveling crane, and the case-cover and trans: former lifted away from the case proper without removing from the case any of the oil in which such transformer is usually immersed and without change of the position of the case proper. After the connections are changed, or ins ection, repairs, or alterations which it was e'sirable to. make have been completed, the cover and transformer may be again lowered into position.

In order that tlfe transformer may be centrally located in the case, the base 2 is ro vided with a flange or portion 26, into which the lower end member 13 telescopes. In order to facilitate the entrance of the end member into the flange 26, its inner'upper surface is beveled, as shown at 27. The

pipe-coil 28, through which water for cooling,

the oil in the casing passes usuall found in large transformers of the type ilustrated, may also be advantageouslycarried bythe case-cover.

The leads 24 from the low-potential winding are preferably flexible conductor s. When constructed entirely of stranded conductors in the manner in which flexible leads are 'usually'made, trouble is sometimes experienced from the siphoning of oil out of the casing by a sort of capillary action along the strands of the conductor. To obviate these difliculties, I have formed the leads 24,.as'

shown in Fig. 2, out of alternate stranded sections 29 and solid sections 30. 'lhe stranded sections may be inserted in sockets 3i formed for the purpose in the solid section, own. Preferabl the solid and stranded ms are soldere together. The layer insulation 32, surrounding thesc conducis preferably formed of some non-porous insulatirn material, such as asuitable paint, varnished cloth, or the likes. This construction of lead is comparatively cheap a effective for the purpose described.

it I claim as new, and desire w secure tiers Patent of the United States, is $.11 combination, a transformer case or ptaclc, a cover therefor, a transformer prising a core of laminae assembled be- .4 end members and means for securing i and .members together, and means engaging one of said end members for securing said transformer to said cover.

2. In combination, a receptacle or case having an opening formed at its upper end, a cover for closing said opening, a transformer located within saidreceptacle comprising a core laminated in horizontal planes, end members between which said core is assembled and means for securing said end memhers together, and means engaging one of the end members for securing said transformer to the cover.

3. In combination, a case or receptacle having an opening at its upperend, a cover for closing said opening, a transformer within the receptacle comprising a core laminated in horizontal planes and an end member or support upon which said core. rests, means for securing said end member to the cover, and terminal conductors for the transformer passing through the, cover.

4. In combination, a case, a cover therefor, a transformer suspended from the cover, and a guiding device for the transformer carried by the case. I

5; In combination, a transformer-case, a

cover therefor, a transformer suspended from the cover, a guide carried by the lower end of the case, and a transformer portion adapted to telescope therewith.

6. In combination, a case, a cover therefor, a transformer provided with a number of leads suspended fromthe cover, terminal conductors secured to the cover, the inner ends of each of said terminal conductors being adapted to be secured interchangeably to one of a series of transformer-leads.

7. A lead for an oil-immersed transformer formed of alternate solid sections and strand ed sections, and a non-porous insulatingcover therefor.

8. A lead for an oil-immersed transformer formed of solid conductin sections, each of said sections being forme with a socket in opposite sides or ends, and intermediate stranded sections secured in the sockets of adjacent solid sections.

9. A non-capillary flexible conductor comprising solid sections socketed in opposite sides or ends, and stranded intermediate secin the sockets of the adjacent solid sections- 10. A non capillary flexible ,conductor comprising solid sections spcketed in opposite sides or ends, stranded intermediatesections, the ends of each of which are inserted in the sockets of the adjacent solid sections,

tions, the ends of each of whichare inserted;

and a non-porous socket or cover of insulating material.

In witness whereof I have hercuntoset myhand this 16th day of November, 1904.

WALTER S. MOODY.

\Vitnesses:

Enwnao WILLIAMS, Jr., BENJAMIN B. HULL.

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