US1087894A - Hood for furnaces. - Google Patents

Description

J. W. SHIRTGLIFP.

HOOD FOB FURNACES. nruornon nun min. ma.

Patented Feb. 17, 1914.

I ume-sun J. W. SHIRTGLIFP.

HOOD FOR FURNACES.

APPLICATION FILED PEB.24, 1913 1,087,894. Patented Feb.17, 1914.

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coumm WA!" 50-. INK m, D. C.

JOHN W. SHIR'IOLIFF, 01? DENVER, COLORADO.

HOOD FOR FURNACES.

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Specification of Letters Patent.

Patented Feb. 1'7, 1914.

Application filed February 2-4, 1913. Serial No. 7503075.

To all whom it may concern:

Be it known that I, JOHN W. Snnrromrr, a citizen of the United States, residing in the city and county of Denver and State of Colorado, have invented certain new and useful Improvements in Hoods for Furnaces; and I do declare the following to be a full, clear, and exact description of the invention, such as 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 letters and figures of reference marked thereon, which form a part of this specification.

My invention relates to improvements in hoods for furnaces, and consists principally in a removably supported hood adapted to cover the exposed portion of a grate, such as is commonly used in brick kilns.

The principal object of the invention is to provide a hood for a grate of this class which shall prevent the escape of the smoke and gases liberated from the fuel by heat and to direct said smoke and gases back to the fire upon the grate where they are consumed.

Another object of the invention is to provide means for readily moving the hood to and away from its operative position.

Still another object is to provide vertical guides upon which said hood may slide and supports vertically adjustable upon the guides.

Other objects will appear hereinafter, as I proceed with the description of that embodiment of the invention, which, for the purposes of the present application, I have illustrated in the accompanying drawings, in which:

Figure l is a fragmental cross section through a portion of a cupola brick kiln provided with my improved adjustable hood. Fig. 2 is a side elevation of the hood and its supporting means, the view being taken in the direction of the arrow 2, Fig. 3. Fig. 3 is a plan view, or a view looking in the direction of the arrow 3, Fig. 1. Fig. 4 is a front elevation. Fig. 5 is a similar view illustrating a modified supporting means for use with a kiln of slightly difierent construction.

Similar reference numerals refer to like parts throughout the views.

In the drawings, which forma part of this specification, the numeral 5 refers to the wall of a kiln provided with a perforated false floor 6. The lower portion of the wall is cut away, at 7 to form an opening for a furnace, the rear wall of which'isdesignated by the numeral 8 and the one side wall visible in the drawing by the number 9. The draft is upward into the kiln, then downward through the false floor 6 and into the chamber 10 below the fioor 6 and thence to a stack or other draft producing means (not shown).

Extending across the lower portion of the furnace and the opening 7 is a grate 12-supported upon cross rods 13 and 14. A sec 0nd portion of the grate has its bars 15 mounted behind the rod 14 and extending upwardly and outwardly, being supported by a rod 16 which is anchored in the wall of the kiln.

Coal is piled upon the grate and allowed to lie outside of the furnace proper, as shown in Fig. 1, in order that it may be thoroughly coked before being burned, thus reducing the amount of smoke which passes into the kiln to the damage of the brick by discoloration.

It will be evident that if the exterior por tion of the grate is left entirely open, smoke and unburned gases will pass off into the atmosphere and a considerable part of the heat values of the coal will be lost thereby. For the sake of preventing this loss, I have invented a means for redirecting the smoke and gases through the fiames of the furnace, where they are consumed, said means consisting broadly of a hood 1? of non-com bustible material preferably fire clay, the hood being of dimensions sufficient to cover the extremity of the exposed portion of the grate and the space between the latter and the wall of the furnace.

It is desirable to so mountthe hood that it may be easily and quickly shifted from the operative to the inoperative position, and vice versa. To this end, I arrangevertical guide rods 18 upon opposite sides of the furnace opening supporting them preferably in suitable bases 19. At the top, the rods 18 are connected by a horizontal rod 20 and at the junctures of the vertical and horizontal rods small rods 21 extend inwardly toward the furnace and have a sliding engagement with the hollow rods 22 fastened to the furnace wall, the rods 21 being retained in adjusted position by means of set screws 23. Depending from the rod-20, near its middle point is a pulley 24, while a second pulley 25 hangs from the same rod, near one of its extremities. A. flexible connection 26 preferably a cable or chain, passes over the sheaves of the two pulleys, a counterbalancing weight 27 being attached to one end of the flexible connection and the opposite end being secured at 28 to the brackets 29 which are fastened upon the hood 17.. Attached to and extending outwardly from the brackets 29 are guide arms 30 which have eyes 31 at their outer extremities surrounding and loosely slidable upon the rods 18. Supports 32 are mounted upon slidable sleeves 38 which may be located in any desired position by set screws provided with handles 34-.

in Fig. 5 is illustrated a slightly modified arrangement of furnace, in which small buttresses 35 are built upon the furnace at the sides of the grate opening. *vV here such a construction is employed, the hood I? is permitted to rest directly upon the tops of the buttresses, and the guide rods 18 are embedded at their lower extremities in the buttresses.

It will be apparent that when an operator desires to raise the hood 17 for the purpose of adding fuel, he may grasp the weight 27 and pull downwardly thereupon until the hood and weight take the positions indicated by broken lines in Figs. l and 5, while the lowering of the hood is merely the reverse operation, both movements benig performed with very little effort owing to the fact that the hood and weight approximately counterbalance each other.

I claim as my invention:

1. The combination with a furnace having a grate, a portion of which protrudes outwardly from the wall of the furnace, of anon-fusible hood adapted to cover the Copies 0! this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0.

upon said guide rods.

space between the extremity of the grate and the wall of the furnace, vertical guide rods mounted upon opposite sides of the grate, means attached to said hood an I slidably engaging the guide rods and 'sup ports for said hood vertically adjustable 2. The combination with a kiln having a grate, a portion of which protrudes outwardly beyond the wall of the kiln, of a nonfusible hood adapted to cover the space between the extremity of the grate and they wall of the furnace, a removable frame including vertical guide rods adapted to rest a upon the ground, means for removably securing the upper end of the frame to the kiln wall, said hood being vertically slidable upon said rods and counterbalancing means for said hood also mounted upon the frame. i

3. The combination with a kiln having a. grate, a portion of which protrudes outwardly from the wall of the kiln, of a nonfusible hood adapted to cover the space be-- tween the extremity of the grate and the wall of the furnace, a removable frame in cluding vertical guide rods adapted to rest upon the ground, means for removably securing the upper end of the frame to the kiln wall, said means being arranged to permit adjustment toward and away from' the wall, said hood being vertically slidable upon said rods and counterbalancing means for said hood also mounted upon the frame. In testimony whereof I aflix my signature in presence of two witnesses.

JOHN WV. SHIRTCLIFF. Witnesses ANNA LOUISE LEHMAN, A. EBERT OBRIEN.

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