US1565466A - Furnace resistor mounting - Google Patents

Description

Dec. 15, 1925- A. KEENE FURNACE RESISTOR MOUNTING Filed Nov. 20, 1925 INVENTOR TORNEY Alvin D. Keene Fig WITNESSES Patented Dec. l5, 1925.

UNITED STATES PATENT OFFICE.

ALVIN I). KEENE, OF PITTSBURGH, PENNSYLVANIA, ASSIGNOR TO WESTINGHOUSE ELECTRIC & MANUFACTURING COMPANY, A. CORPORATION OF PENNSYLVANIA.

I FURNACE RESISTOR 'MOUNTING.

Application filed November 20, 1923. Serial No. 675,864.

To all whom it may concern.

Be it known that I, ALVIN 1). KEENE, a citizen of the United States, and a resident of Pittsburgh, in the count of Allegheny and State of Pennsylvania, ave invented a new and useful Improvement in Furnace Resistor Mountings, of which the following is a specification.

My invention relates to furnaces and particularly to electrically-heated resistance furnaces.

One object of my invention is to provide a relatively simple resistor mounting for electrically heated resistance furnaces.

A further object of my invention is to provide a relatively simple means for mounting section, of an electrical resistance furnace a resistor as a unit.

In practicing my invention, I provide a plurality of refractory heat-insulating walls enclosing a furnace chamber and supporting a plurality of spaced sets of refractory members, of substantially T-shape, projecting into the furnace chamber. The refractory members of T-shape are spaced apart laterally, and relatively thin, narrow, perforated, refractory plates are held by the outer ends of the members of T-shape. A relatively heavy resistor member, preformed to comprise a plurality of straight and substantially parallel-extending return bent convolu tions, is held by the perforated plates whereby the convolutions extend substantially parallel to the furnace walls and closely adjacent thereto.

In the single sheet of drawings,

Figure 1 is a view in vertical section, of an electrically heated furnace embodying my invention; I

Fig. 2 is a fragmentary view, partly in side elevation and partly in longitudinal embodying my invention; Fig. 3 is a fragmentary View, in front elevation, of a refractory member, a resistor, and refractory supporting members;

F ig. 4 is a fragmentary view, partly in longitudinal section and partly in side elevation, of an electrical resistance furnace showing a further embodiment of my invention; and

' Fig. 5 is a viewfin front elevation, of a plurality of refractory members, and resistors as shown in that embodiment of my invention in Figure 4..

stantially T-shape, are more particularly illustrated in Figures 2, .3 and 4. of v the drawing and, as are shown, are provided with two depressions 11 and 12 of unequal depths, located in opposing surfaces of, and ad acent, the end of the T-shaped member. As hereinbefore stated, the members 10 are located in spaced relation and relatively thin and narrow refractory members or bars 15 each having a plurality of perforations extending laterally through the plate between opposite surfaces, are supported by cooper ating members 16 immediately adjacent the wall of the furnace.

In another embodiment, as shown inFigure 3, the depressions, 11 and 12 have substituted thereforthe laterally extending grooves 13 and 14.

Means for preventing lateral movement of the members 15 relatively to the supporting members 10 may comprise metal rods 16,

of substantially L-shape, which are dropped into spaced openings 17, the width of the member 15 being such as to extend substantially between the two members 16 to be held thereby against lateral movement relatively to the supporting member 10.

A resistor'inember 18 is located between adjacent perforations 19 and extends between and beyond these resistor-supporting members and comprises a plurality of straight and substantially parallel-extending return-bent convolutions of a relatively heavy resistor bar or" rod which 1s self.sup porting between and beyond the resistor supporting members 15.

The resistor member is held against the bars 15 by means of metal members 20, ofsubstantially hair-pin shape, that extend through the hereinbefore mentioned perfora tions, the ends of the members 20 being bent over against one surface ofthe bar 15.

each other.

While I have illustrated the heating elements as located in the end and side Walls only, the same general construction may be employed in the roof of a furnace.

In assembling the parts embodymg the furnace structure the supporting members of T-shape are located in proper spaced relation, substantially as illustrated 1n the drawing, and in mounting the heating element, which has previously been secured to the resistor supporting members by clamps of-substantially hair-pin shape 20, the 1ndividual members '15 may be slipped into place back of the overhanging flanges by a tilting and lateral and downwardly directed movementof the entire unit. If the structure such as illustrated in Fig. 3 isused,

the unit is slipped into place behind the overhanging flan es ofthe member of T- shape adjacent the walls and the locking keys 21 and 22 may then be placed in position, thus, completing the installation of the resistor member.

Various modifications may be made in the device embodying my invention and I desire that only such limitations shall be placed thereon as are imposed by the prior art or are specifically set forth in the ap-' pended claims.

I claim as my invention:

1. In an electric resistance furnace, in combination, a refractory wall, a plurality of-refractory members, of substantially T- shape, supported by said wall, a' resistorsupporting member extendin between said refractory members and a plurality of resistor members secured to said resistor-supporting members on opposite sides thereof.

2. In an electric resistance furnace, in combination, a refractory wall, a plurality i of refractory members, of substantially T- 'shape, projectin from said wall, a resistor supporting mem er extending between said refractory members, and .a plurality of remembers, extending between said re sistor members secured to said resistor-supporting. member. 1

3. In an electric resistance furnace, in combmatlon, a plurality of refractory walls enclosing a furnace chamber, a plurality of refractory members,- of substantially 1'- shape, s pported bysaid wall, a plurality of rela vely narrow [res1stor-supfp0rting ractory members, and a resistor member secured to the resistor-supporting members whereby the resistor-supporting members and resistor member may be unitarily placed in an operative position.-

4. In an electric furnace, in combination, a plurality of refractor Walls enclosing a furnace chamber, a p urality of refractory members supported by one of said walls in said chamber, a plurality of resistor-supporting members extending between said refractory members and a .plurality of alternately spaced resistor members secured to different surfaces of said refractory members.

,5. In an electric resistance furnace, in

combination, a refractory wall, a plurality of spaced sets of refractory members, of substantially T-shape, having laterally grooved opposite surfaces supported by said wall, resistor-supporting members extending between spaced pairs of said refractory members, and a plurality of resistor members secured to said resistor-supporting members.

6. In an electric resistor furnace, in combination, a plurality of refractory walls enclosing a furnace chamber, a plurality of refractory members supported by one of said walls and projecting into said chamber, a perforated resistor-supporting member extending between said refractory members, a

resistor member and means associated with said perforations in said refractory member whereby said resistor member is secured to said resistor-supporting member.

7. In an electric resistance furnace, in combination, a plurality of refractory walls enclosing a furnace chamber, a plurality of refractory members supported by one of said walls and projecting into said chamber, a perforated resistor-supporting member extending between said refractory members, a resistor member, and a relatively narrow resistor securing 'means associated with the perforations in said refractory member whereby a maximum resistor radiating surface is maintained. p Y

8. In an electric resistance furnace, in combination, a refractory wall, a plurality of spaced sets of aligned and spaced refractory members, of substantially T-shape, supported by said wall, each member having depressions in opposite surfaces, and resistor-supporting members extending be- 1 tween opposed pairs of said refractory members, having their ends operatively located respectively in said depressions by a tilting and lateral and downwardly directed move ment, and a plurality of resistor members secured to the opposite surfaces of theresistor supporting members.

Inan electric resistance furnace compris ng a plurality. of refractory walls en closing a furnace chamber, aheater element comprising a plurality of resistors, a. plurality of refractory resistor supports and means for securing said resistors to said supports in alternately spaced positions.

' 10. In an electric resistance furnace comprising a plurality of refractdry walls enclosing a furnace chamber, a heater element comprising a plurality of resistors, a plurality of perforated refractory resistance supports and a relatively narrow means asing surface is maintained.

In testimony whereof, I have hereunto subscribed my name this 14th day of November 1923.

ALVIN D. KEENE.

Images