US949086A - Transformer-case construction. - Google Patents

Description

L. 0. NICHOLS. TRANSFORMER CASE GONSTRUOTION.

APPLIUATION FILED OUT. 19 1905.

Patented Fgb.15,1910. I

M M I; wmm M fix i lTo illicit-omit may concern:

ITED sT T s PA E T ()FFIGE.

H roUI's ojNIC-rrons, 0F nonwoon, onrq-Ass-tenon To THE BULLOCK-ELECTRIC MANUFACTURING COMPANY, A CORPORATION or OHIO.

3 TRANSFORMER-CASE CONSTRUCTION.

Specification of Letters latent. PatenteflFebf 15, 1910. Application tiled October 19, 1905, Serial no. 253,533.

Elle: it lmownthat I-LOL'IS C.N1cnons,citienoftheln1ted States. residing at Nor.-

wood, in the countyof Hamilton and State 5 of Ohio, have invented certainnew and usef'ful- Improvements in .Transformer- Case "Qti istructionyof which the following is a f,full;'clear and exact specification.

" My invention relates to transformers and especiallyto casings for transformers of the lled self-cooling type.

co rr iigate d metal, so as to obtain heat radiatl l l i i l 1 ns former casings are usually made of.

ling surfacesof sufficient area to dissipate th the heat absorbed bythe oil within the easing Corrugated asings made both of cast etaliand sheet metalarewell known. Ca t metal casings are objectionable on account of theirweight andbecause the thickness of the netal pi events closely corrugated. and

' hence good heat radiating surfaces.

r Sheet metal casings have many advantages over the cast. metal casings, sincemompara I "tivelythin and closely "corrugated sheet metal plates/can be employed. Thus the casingtis light in weight and has a large 1 heatradiating surfaces Furthermore as thinsheet metal is employed, heat can easily be conducted from the oil in which the transformer is immersedtojthe atmosphere surrounding the casing.

is usually composed of a number of sections secured together by fusible metal, and this The corrugated wall corrugatcd; wall is attached to a base by lifusible. metal in order to obtain oil-tight joints. It is necessaryto seal the'joints by 2 fusible metal since the corrugations prevent the joints .from being rendered Oil-tlgllt' by riveting or -calking or by any other means.

40 The use of fusible metal in" the construction of sree t' metal transformer casings is a serious objection, for, should the casings be subjected to considerable liea he. fu ible metal would melt and allow an to flow from the casing.

The object of sheet metal transformer casing in which no my invention is to provide a fusible metal is required to obtain oil tight p i Between the plates 12 and 15 is shown 1n joints.

In carrying out my invention I provide a sheet-metal transformer casing having a More specifically considered my, invention consists of a transformer casing which coinprises a sheet-metal oil tank having riveted and calked joints and a surroui'lding water tight corrugated sheet-metal jacket or cover containing water or bther liquid having a high specific heat. K I

My invention still further consists in the details of construction and the combinations of elements described in the specification am. set forth in the appended claims. 1

For a better uuderstandingof my. invention reference is had to the accompanying drawings in which; I t

Figure l is a vertical section through the transformer casing, (the transformer being shown in elevationg) and Fig. 2 is a hori- 'zontal section of the casing. i The cylindrical portion of my casing consists of two parts, an inner smooth uncorrugated sheet-metal cylindrical tank 10, adapted to hold the oil, and an outer corrugated sheet-metal jacket or' cover 11 adapt-" ed to contain the water or other liquid haw ing a higher specific heat than the oil. The cylindrical portion, 10 may be made of a? It single sheet of metal theends'of which are rive-ted together, and the joint made oiltight-by calking. The bottom of the cyl-in- 1 vide an oil tight joint.- The cylindeflQ'is-I provided at its top with theusual cap 13. It

is seen that the oil tank isprovided Wltll joints which can notbe opened by heat. *In order that this tank may hare a largeliefa't radiatingsurface and hence be self-cooling I surround the oil tank or chamber with the corrugated sheet-metal jacket 11. -The"'- 3 spaces between the cylinder 10 and j ackec11,- I fill with water or anyother good heat conducting fluid having a higher specifi'c'heat than oil. The jacket 11 may be made ofany number of sections secured together by fuslble metal. I have shown. for convenience only two sections. The corrugated portion 11, rests on a plate or base 15 and maybe secured thereto by any easily fusible metal.

or wall 11 is preferably provided with a 5 sheet-metal cap 17. If desired, means such 1 as a valve A may be provided for withdraw ing'the water from the inclosure between the tank 10 and jacket 11. The entire caslng and 1 tions which do not depart from the transformer is supported on a' cast metal base 18. f

'The transformer proper,'c0nsisting of coils 19 and core 20 is mounted on a base 21, which rests on the bottomof the tank. The transformer is adapted to be-surrounded by a cool ng and insulating oil 22'l'as. in the customary manner. The heat generated in the transformer will be absorbed by the oil and conveyed to the cylindrical wall 10 which will transmit xthe heat by conduction to the surrounding :water or other heatconveying fluid of higher specific heat than the oil. The large radiating surface of the jacket 11 permits the'heat to be readily dissipated.

I aim in my claims to cover all modificaspirit and' scope of my invention.

\Vhat I claim as. new and desire, to secure by Letters Patent -is:

1. In combination, a transformer casing comprising a sheet metal tank containing oil, a transformer therein, and a surrounding jacket for dissipating the heat, said jacket containing. water. 1

2. In combination, a'transformer casing comprising a sheet metal tank having riveted and'calked oints, an oil immersed transformer thereln, and a surrounding acket having a large heat radiatingsurface, said jacket containing a fluid of higher specific;

' capacity than-the aforesald liquld. 1

heat than the oil. w

3. In combination, 1a. transformer comprising a sheet metal tank for containing oil, said tank having riveted and calked joints, an oil immersed transformer therein, and a corrugated metal jacket surrounding the tank and containin a fluid of higher specific heat than the Oll.

4. A transformer casing comprising ."a sheet-metal oil tank having riveted and calked joints, and asurroim'ding Water tight corrugated sheet-metal jacket or cover con-- taining water. w

5. A transformer casing consisting of a sheet-metal tank having a cylindrical body portion and a base plate riveted thereto, the

seam or joint being calked, and a corrugated sheet-metal jacket consisting of corrugated sections and a base plate, the joints of the jacket being sealed whe'reby water or i other fluid may be retained in the spaces between the cylindrical tank and the corrugated jacket.

liquid.

immersed having ,the aforesaid llqul 6. In combination, a transformer, a casing. a mclos ng said transformer, sa d casing comprising a tank containing a cooling and in-- sulating oil, said tank being formed oi smooth or uncorruga ted sheet metal plates having rivet-ed and calked joints, and a corrugated sheet metal wall or jacketsurrounding said tank, the space between the tank and wall being filled with a heat conducting 7. In combination with a receptacle containing a'heat-producin d'evice and a liquid, of .a liquid in which he receptacle is immersed havinga greater. thermal bapacity than the liquid Within. the receptacle.

8. The combination with areceptacle con taining a'heat-producingdevice and a liquid, 1 of another liquid in which the receptacle is a higher specific heat than 9; The combination with a heat-producing device, a liquid surrounding theisame, and a. receptacle therefor, of a reservoir in which the receptacle is located, and a liquid contained therein having greater specific heat than the. aforesaid liquid. 1 10. The combination with a' heat-producing .device, a liquid surroundingthe same, and a receptacle therefor, of a reservoir in -which the receptacle is located, and a liquid contained therein having-a greater thermal 11.--,Tl1e combination with a receptacle containing an electrical translating device and the receptaclehaving a higher specific heat than the insulating liquid. v 13. The combination with areceptacle con-.

taining a' heat-producing device and a liquid, of. substance surrounding the receptacle that has a greater thermalcapacity than the liquid in the receptacle.

.QIn testimonv whereof I'aitix my signature,

in the presence of two witnesses.

' LOUIS c. NICHOLS'.- "Witnesses 1 FRED J. KmsEY, ARTH R Fa. KWIs.

l aminsulating' liquid, of a liquid surrounding I,

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