US501188A - Flooring for blast-furnaces - Google Patents

Description

M. W; ILES,

(No Model.)

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FLOORING FOR BLAST-FURNACES.

SPECIFICATION forming part of Letters Patent No. 501,188, dated July 11, 1893.

Application filed February 25, 1892. Serial No. 422,768. (No model.)

To all whom it may concern:

Be it known that I, MALVERN W. ILES, of Denver, Arapahoe county, State of Colorado, have invented a certain new and useful Flooring for Blast-Furnaces, of which the following is a true and exact description, reference being had to the accompanying drawings, which form a part of this specification. t

My invention relates to the construction and arrangement of the iron flooring plates usedat the top of blast furnaces and has for its object to provide a ooring at once safer and more durable than thosenow generally used. I accomplish this result by so constructing the plates that the inner ones, or those nearest the charging hole, will be, to a certain extent, supported by the outer plates, and also by reinforcing the cast iron liooring plates by Wrought-iron strengthening strips secured to them by aline of rivets or bolts so that even if the plate breaks it will still be held together and prevented from falling or permitting a man standing upon it to fall into the furnace.

The nature of my improvements will be best understood as described in connection With the drawings in which they are illustrated, and in Which- Figure l is an elevation of the blast furnace, the flooring being shown in section on the line 3-4 of Fig. 2. Fig. 2 is a plan view of the flooring; and Fig. 3 a section on the line 1-2 of Fig. 2.

A indicates the blast furnace which may be of any usual construction.

B is the level of the top of the furnace at which the material is charged into it; and C the charging hole formed in the flooring plates at the center of the shaft.

As shown in the drawings I employ eight floor plates-six being end-plates of which, however, only four extend over the shaft of the furnace, and two, side-plates- Of the end plates, those marked D and D are shown as plain fiat cast iron plates which I may mention are usually made of about an inch thickness. D2 and D5 extend partly over the ends of the shaft while the plates D-1 and D5 extend across the shaft as shown; the side plates E and E' extend from the sides of the shaft toward its center. Those plates which extend over the shaft are provided with reinforcing strips CZ made of wrought iron or steel and secured along the exposed edge of the plate to which they are applied; they are fastened to the plate by a row of rivets d2 as shown. On one or both edges of the end plates I form projecting lugs d extending out from the bottom `or lower side of the plate and adapted to lie beneath and in contact with the abutting edge of another end plate or to pass under and support the abutting ends of the side platesE andE as shown. By thus constructing .and arranging the floor plates it will be seen that the outer edges of the plates D4 and D5 are supported by the lugs on the inner edges of the plates D2 and D3; which edges can be also supported in the same way by lugs d extending out from the lower face of the plates D4 and D5. Similar lugs extending out from the inner edge of the plates D4 and D5 pass beneath the abutting edges of the plates E and E sothat the inner edges of these platesare supported directly upon the side plates.

It is obvious of course that a plate supported as above indicated cannotsag and also that even in case of a plate breaking it will be so supported as to at least greatly diminish the risk of its falling into the furnace or precipitating a man or material standing upon it into the furnace. But the danger from breaking plates may be said to be entirely overcome by the'use of the Wrought iron strips riveted to the lower faces of the platesthese strips acting to hold broken sections of the plates together and being strong enough in themselves to support any weight which is likely to be cast upon them.

l have referred to the fastening devices d2 as rivets, which are by far the best fasteners, but it will be understood that bolts or any equivalent fastening device can be used for this purpose.

I am aware that it is not new to strengthen iron castings by casting the metal around bars of wrought iron or by shrinking wrought iron bands around castings of suitable shape, but neither of these plans is adapted for use with furnace floor plates and I believe that such plates have never heretofore been constructed of Wrought and cast iron as my construction enables them to be. l,

Having now described my invention, what IOC I claim as new, and desire to secure by Letters Patent, is

l. The combination with a furnace having a charging opening as C, of cast iron flooring plates extending over the furnace and around the opening C and having a reinforcing strip of wrought iron or steel secured thereto by means of rivets Z2 all substantially as described and so that the parts of the piate if broken may be held together by the steel or Wrought iron strips.

2. As a new article of manufacture cast iron floor plates for blast furnaces having outwardly-extending lugs d on a lower edge or edges adapted to extend beneath an abutting MALVERN W. ILES. Witnesses:

F. D. FRENCH, JOHN S. WILLIAMS.

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