US1622651A

US1622651A - Electric furnace

Info

Publication number: US1622651A
Application number: US25615A
Authority: US
Inventors: Alvin D Keene
Original assignee: Westinghouse Electric and Manufacturing Co
Current assignee: CBS Corp
Priority date: 1925-04-24
Filing date: 1925-04-24
Publication date: 1927-03-29
Anticipated expiration: 1944-03-29

Description

Ma 1927' A. n. KEENE I ELECTRIC FURNACE Filgd April 1925 2 Sheets-Sheet 1 WITNESSES: ."YINVENTIOR g g x I A/gn/(eene AiToRNEY March 29,1927. 1,632,681".

1 A. D. KEENE ELECTRIC FURNACE Filed April 24 1925 Z Shams-Shem 2 INVENTOR Patented Mar. 29, 19279 UNITED STATE S PATENT OFFIQE,

ALVIN :o. or rrrrsnonen, rEnNsYLvAmA, ASSIGNOR 'ro wesrmeraouss swarms & MANUFACTURING COMPANY, A oonroee'rron on rrinirsvrveure.

ELECTRIC FURNACE.

Application filed April 24, 1925. Serial. No. 25,615.

My invention relates to electric. furnaces and particularly to res1st-or-support1ng means for such furnaces.

One object of my invention is to provide a relatively simple and compact, removable, resistor-supporting means that is interlocked with :1- wall of the furnace, in combination with a holding means therefor that is held in place by a resistor member.

In practicing my invention, I prov de a resistor-supporting member having an inner portion adapted to interlock with a "Wall of a furnace and a holding means for said supporting means that is held in proper operative position by a resistor carried by sa1 supporting means.

, {In the drawings,

Figure 1 is a view, in" vertical longitudinal section, of a furnace embodying my invention;

Fig" 2 is a view, in side elevatlon, of a resistor-supportiug member embodying my invention l Fig.3 is an end view thereof;

Fig. 4. is a top plan View thereof; I

Fig. 5 is a top plan View of a holding meansoperatively associated with the resister supporting member illustrated in Figs. 2 to l, inclusive;

Fig. 6 is a view, in vertical longitudinal section, of a modified form of furnace cinbodying my invention;

Fig" 7 is a fragmentar; horizontal SEC, tioual view therethrough ta en along the line 7-7 of Fig. 6;. v s

Fig. 8 is aview, in perspective, of a resistor-supporting member embodying my invention, and

Fig. 9 is a View, in perspective, of a holding means operatively associated with the resistor supporting member illustrated in Fig 8:

Referring more particularly to Figs. 1 to 5 of the drawings, an electric resistor fur-- nace ll comprises a, plurality of bricks or blocks 12, of a suitable refractory electricinsulating material so arranged as to constitute a plurality of Wallsenclosin rv a furnace chamber 13. The bricks or bl0Cl(S 12 are so shaped. anddisposed as to provide a furnace chamber of any suitable or desired contour and dimensions, here shown as substantially rectangular in section.

As the device embodying my invention and to hehereinafter described in :letuil, maybe associated with any usual construction of furnace of this typefthe furnace Proper is not further illustrated 01 described in detail. It is, however, provided with all other vices usually provided for furnaces of this type and comprising doors with charging means, etc, as may be required by the method of operation of the furnace.

Each of the walls that is to have on ex tended resistor member associated therewith and supported thereby, is provided with. horizontal groove or slot 14: that is of suhstantially L-shape in lateral section as is more particularly shown in the two side walls of the furnace 11 in Fig 1 of t drawing.

A resistorsupporting member or hanger block 15 is made of a refractory electric insulatingceramic material. The member 15 is of substantially Lshape in longitudin l section, that is, it is provided with a later I\ extension 16 at'the rear end thereof, which. rear end portion. is adapted to fit into the slot or groove let. The front end of t member 15 is adapted to extend into the mace chamber 13 and is provided with. laterally-extending groove 17 'upon whi may be' located a resistor member 18, The resistor member 18 is here shown it fiat ribbon of a suitable metallic resistor niateriah such as niclu'ome, that is preformed to comprise a plurality of substantially straight and parallelextendingconvolutions substan tially as illustrated in Fig. 1 of the drawing. The resistor member is adapted to be sus pended by the upper loops thereof from a plurality of spaced resistousupporting memberslo While I have illustrated the hanger blocks 16 as formed to support a resistor ribbon they may be adapted to support a rod or wire or a tubular resistor member, in which case the portion '1'? is madeshorter than illustrated in Fig. 2 of the drawing A lateral projection 19 is provided at the front end of the member 15 and is integral therewith for preventing ruovement of the resistor member-'18 longitudinally of the member 15. i

A refractory holding member 21 opera tively associated with each of the supporting memberslo and maybe of the same width, as the body portion thereof and, is adapted to be located beneath the nieinb In placing the supporting their proper operative position member 21 is then placed beneath the mem-- ber whereby the latter is maintained in interlocked; position Within the groo-v 114 and relatively to the wall of the furnace. The length of the-member21 is such ithat it extends from the rear end of the groove 1 1- to a point immediately back of the rear edge of the resistor member, whereby it is held in its proper operative position by the resistor member.

'While I ha e indicated, in Fig.1 of the drawing, that the resistousupporting members 1-5 are to be separated by individual bloc 22,:this construction is not essential as he horizontal widthtot the members15 be made such, especially at the rear porthereoih that the sides thereof will be erative engagement and no spacing would then be required. plurality of properly spaced and alined lugs 23' are provided'to space the bottom loop portions of the resistor member from each other, as is iliustrated in Fig.- 1 of the drawings.

Peferring more particularly to Fi s. 6 to 9 inclusive'oi the drawings, a modified form of device embodying my invention is there illustrated. Resistonsupporting members'2 i are there provided and maybe made of relatively thin material, such as nichrome, each member 24; having an integral lateral 1 extension 25 at the. rear end thereof. The front end theieoi is adapted to project into the furnace chamber 13 and is provided with a notch 26 in its upper portion to receive a stor member 18, here illustrated as a fiat bon of nichrome'that is preformed to oniprise a plurality of straight and paralxtending convolutions as was hereinbere described in connection with Fig. 1 of a drawing. The'furnace structure is substantially the same was hereinbetore described and those ll hat are to receive and support a plus 'ty of spaced resistor supporting members are repectivcly provided with a plurality that are of substantially L-shape in horizontal section. The projection 25 of the member 2a is adapted to tit into the lateral extension or projection in an opening 27 as is illusred more particularly in Fig. 7 of the The member 2% is moved into its prcoperative position by a movement that; is substantially at right-angles to the of the furnace wall in which it is to be mounted and a single movement in a direction longitudinally thereto. A holding c relatively narrow openings 27 therein,

bar 28 is then placed in the opening 27 at one side of the member 24 and maintains the member 24 in its interlocked osition in the opening 27. The length of t e member 28 is such that it projects a'short distance be- ,yond the face of the furnace wall and is o )eratively engaged by the resistor member W ich maintains it in the opening 27, whereby the resistor supporting means and the holding means therefor are held in their proper operative positions relatively to the fur-mice wall;

While I have, illustrated the resistor supportin member 24 as being located in a su stantia ly vertical position with the integral projection 25 extending in a horizontal direction, I do not desire tobe limited thereto as the projection 25 ma be so located as to project in a vertical. irection either upwardly or downwardly as desired.

Lugs or projections 23 may be provided to properly space the resistor portions apart at the bottom end thereof as was hereinbefore described in connection with Fig 1 of, the drawings.

' Although the part 15 has been designated as the resistor-supporting member and the part: 21 as the holding member, yet, looking at my inveution from another viewpoint, the

parts

15 and 21 taken together, may

properly be considered as constituting s. two-part resistonsupporting means, slnce they oo-operate to ,sup ort the resistor. Likewise, the arts 24 an 28, taken together, may be consi cred as a two-part resistorl supporting means.

It may be noted that the device embodying my invention provides a plurality of spaced resistor-supporting members that may be made either of a ceramic electric-insulating material or that may be made of a metal andas may be found suitable or desirable, and that these members are located and supported by a wall of a refractory electric in sulat-ing material of such material and con- 110 struction as to prevent a grounding or a.

short circuit of the resistor mmber itself.

The resistor-supporting means are respectively interlocked with the wall and are held in their proper operative positions relatively 115 thereto by means that are respectively held in their proper operative positions by a resistor member supported by the resistor supporting means.

While I have illustrated the device 0111- 120 bodying my invention as supporting adepending resistor member its use is not restricted thereto as it may be employed with other forms of resistor members that may, for instance, extend in a substantially 125 horizontal direction.

Various modifications may. be made in the device embodying my invention with out departing from the spirit and scope thereof and all such modifications are intended to be covered by he appended claims. l I claim as my invention:

1. In an electric furnace,the combination with a furnace wall, a resistor-supporting member supported by said wall, and a resistor supported by said member, of means for holding said resistor-supporting memher in its proper operative position in said wall, said holding means being prevented from longitudii lhl movement by said resistor member.

2. In an electric furnace, the combination with a furnace wall provided with a slot, of a resistor-supporting member extending into said. slot and having interlocking engagement with one side thereof, a resistor supported by said member, means engaging one surface of said supporting member for maintaining said supporting member in proper operative position, said means being maintained in proper operative position by said resistor.

3. In an electric furnace, the combination with a furnace wall having a slot, of a resistor-supporting member, having interlocking engagement with the sides of said slot, an elongated member for maintaining said resistor-supporting member in proper operative position, a resistor supported by said member, said elongated member being prevented from. longitudinal movement by the resistor.

In an electric furnace, the combinatio with a furnace wall, and a resistor member located adjacent thereto, of a resistor-supporting member movable into its proper operative position into said wall by a lateral and then a longitudinal movement thereof relatively to the face of said wall, and means for holding the resistor-supporting member in its proper operative position in said wall, said holding means being held in operatlve position by said resistor member. 5. In an electric furnace, the combination with a furnace wall having a slot, of a reextending into said slot and having interlocking engagement with the sides thereof, a resistor supported by said resistor-supporting member, and means extending alongside of said resistor-supporting memher for maintaining it in said interlocking enga ement.

7. 11 an electric furnace, the combination with .a furnace wall having a slot of L- shape, of a resistor-supporting member of L-shape, having interlocking engagement with said slot and means for holding the resistonsupporting member in its proper operative position in said wall.

8. In an electric furnace, the combination with a furnace wall having an opening therein, a resistor-supporting member fit ting into said opening and having interlocking engagement with the wall, a locking bar substantially co-extensive with the resistorsupporting member and engaging one face thereof, and a resistor member supported by the resistor-supporting member and effective to hold the locking bar in the opening.

In testimony whereof, I have hereunto subscribed my name this th day of April,

ALVIN D. KEEN E.