US698485A - Twyer for furnaces. - Google Patents

Description

No. 698,485. Patented Apr. 29, I902., w. B. FOSTER. v

TWYEB FOR FURNACES.

(Application filed July 26, 1900.) (No Model.)

WITNESSES. I INVENTOR,

THE rmams ma; co; mum-Limo wmlks'rou. D, c.

UNITED STATES] PATENT OFFICE.

WILLIAM'E. FOSTER, on UTIGA, NEW YORK.

T W YER FoR FURNACES.

SPEUJIFIQATIQN forming part of Letters Patent No. 698,485, dated April 29, 1902.

Application filed July 26, l 900.

To all whom it may concern.-

Be it known that I, WILLIAinB. Fos'rEE, of Utica, in the county of Oneida and State of New York, have invented certain new and usefullmprovementsinTwyers forFurnaces; and I do hereby declarethat the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the numerals of reference marked thereon,which form part of this specification.

The object of my presentinvention is to provide a twyer for blast-furnaces or cupolas having means or facility for inserting a bar through the twyer-opening into the furnace to break a bridge formed in the furnace.

Figure 1 shows a partial side elevation and a partial vertical section of a part of a blastfurnaoe including the features of my invention. Fig. 2 shows a view taken at right angles from that in which the parts are shown in Fig. 1. Fig. 3 shows a side elevation, and Fig.4 a plan View, of a removable twyer plate, including twyer or blast-pipe.

Referring to the reference-figures in a more particular description, 1 indicates the casing of a cupola or furnace, which is lined in the usual manner witha lining 2 of fire-brick. The twyer-opening 3 is inclosed on the outside by a casing 4E, surrounding the opening 3 and secured to the furnace-shell. The casing 4is provided withan elongated upper wall and a short lower or bottom wall 4?. The outer end of the twyr box or casing 4: is closed by a door 5, which may be mounted on hinges and supplied with a catch, as shown. The tube 6 connects the twyer-box with a blast-blower or, some air forcing mechanism. For substantially closing the end of the box or casing toward the furnace there is provided a removable plate 7, having attached thereto a short section of pipe 8, which is the twyer or blast-pipe. i

It is a well-known fact that in furnaces, particularly those'of smaller capacity, and on long runs bridges of the fuel and material are liable to form in the furnace above the twyer-openings, which interfere with the operation of the furnace. It is necessary or desirable to break these bridges, letting fuel in use. lower wall P of the twyer-box is reduced to substantially as shown by the dotted lines and indicated by A. After the bridge is broken the plate 7, with its blast-pipe, is replaced and the door 5 closed. This opera tion can beperformed in a few seconds without interfering with the operation of the furnace to any material extent.

It will be noted that the twyer-opening through the wall of the furnace which I employ is of considerably larger proportions, particularly vertically, than those heretofore This, together with the fact that the the minimum, allows the bar to be inserted through the twyer-opening at quite an acute angle with the axis of the furnace.

What I claim as new, and desire to secure by Letters Patent, is

1. The combination in a furnace of a twyer opening having a vertical extent equal at least to the thickness of the furnace-wall at the twyer-opening, a plate for said opening removable without necessitating the removal of other coactin g parts and having a blast-opening and means for conducting the air to said blast-opening, substantially as set forth.

2., The combination in a furnace of a twyeropening andits surrounding casing,said opening and casing being not less in vertical extent than the distance from the inner face of the wall of the furnace, to the outer edge of the bottom wall of the casing, a removable plate having a blast-opening, means for conducting the air to said blast-opening and 'means for opening and closing the casing, substantially as set forth.

3. A furnace having a twyen-opening of a size to permit the introduction of a bar at an acute angle with the axis of the furnace, as set forth, a removable plate for said twyeropening having a blast-opening therein and a movable without necessitating the removal of other coacting' parts, and having a blast-opening of smaller area than that of the twyeropening, and means for conducting the airblast to said blast-opening, substantially as set forth.

I In witness whereof I have aiiixed my signature, in presence of two witnesses, this 24th day of July, 1900.

, WILLIAM B. FOSTER. Witnesses:

CHARLES G. IRIsH,

S. A. BROWN.

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