US1055114A - Grate. - Google Patents

Description

A. W. WOOD.

GRATE.

APPLICATION FILED JULY 6, 1910v 1,O55,-1 14, Patented Mar. 4, 1913.

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ARTHUR W. WOOD, OF HOUSTON, MINNESOTA.

Specification of Letters Patent.

Patented Mar. 4, 19113.

Application filed July 6, 1910. Serial No. 570,565.

ployed with stoves and furnaces that take.

wood or coal as fuel.

One object of the invention is the provision of a grate one of the bearing members of which is formed to provide an air duct and a plurality of hollow grate bars suspended by the bearing members and having their open ends in communication with the air duct.

Another object is the provision of a grate including a plurality of pivoted grate bars the surfaces of which are flat and perforated and means for tilting said grate bars.

Vith these and other objects in view, which will more fully hereinafter appear, the present invention consists in certain novel details of construction and arrangement of parts, hereinafter fully described, illustrated in the accompanying drawings, and more particularly pointed out in the appended claim, it being understood that various changes in the form, proportion, size, and minor details of the device may be made, within the scope of the appended claim, without departing from the spirit or sacrificing any of the advantages of the invention.

In the accompanying drawings, forming part of the specification ;Figure 1 is a plan view of the device. Fig. 2 is a longitudinal sectional view on the line 2-2 of Fig. 1. Fig. 3 is a sectional end View on the line 3-3 of Fig. 1. Fig. 4 is a detail perspective of one of the hollow grate bars with end portions of the top plate thereof broken away and disclosing the pivots. Fig. 5 is a detail perspective of one end portion of one of the hollow grate bars showing thev top plate thereof in raised position.

Similar numerals of reference are employed to designate corresponding parts throughout.

5 and 6 denote bearing members or bars which are positioned at opposite sides to support the grate bars. The member or bar 5 is a channel iron and is disposed against one of the furnace walls to form an air conduit 7 and has a vertical side cut-away to provide passages 8 and to receive the ends of a part of the grate bars and the air flowing through the passage 7 is adapted to enter said grate bars through the passages 8.

\Vhat will subsequently be termed the tilting grate bars are designated in general by the numeral 9. These grate bars are rectangular in cross section and correspond in length approximately to the distance be-- tween the bearing members 5 and (3. The grate bars 9 are provided with a plurality of transverse openings extending through the opposite flat faces of the bars to permit the air to pass from the space below the grate into the fire-box. The tilting grate bars 9 are arranged in spaced relation to each other, the space thercbetween, when the flat surfaces of the bars are in a horizontal plane, being equal to the width of one grate bar, or substantially so. By reference now to the drawings, it will be seen that the opposite ends of the grate bars 9 are provided on their lower faces with depending lugs 10, said lugs having openings for the reception of pivot pins 11 which pass through the openings of the lugs and into oppositely disposed openings in the hearing members 5 and 6. \Vith this construction it will be manifestthat the grate bars are pivotally connected to the bearing members 5 and G.

In order that the tilting bars may be simultaneously moved the following construction is employed z-By reference now to Fig. 2 it will be seen that the medial portions of the bars 9 are provided with transversely disposed lugs 1.2, and depending from said lugs are hangers 13. The lower ends of the hangers are pivotally connected to a common connecting rod 14;, one end of which extends through the ash pit door opening of the furnace or through any other suitable opening in the vicinity of the ash pit, and is connected to one end of an operating rod 15. \Vith this construction it will be manifest that by moving the operating rod in one direction the tilting grate bars 0 will be likewise moved to assume the required angle to the bearing members 5 and 6.

The spaces between the tilting grate bars l'eCQlWE what will subsequently be termed hollow grate bars. Since these members are all identical in construction a description of one will be sufficient.

By reference now to the drawings it will be seen that each of the hollow grate bars comprises an inclined bottom designated by the numeral 16, said bottom being oblong in cross section and rising from the opposite longitudinal sides thereof are side walls 17 and 18. The side walls 17 and 18 correspond in length approximately to the dis tance between the opposite outer faces of the bearing members 5 and 6, the opposite end portions of said side walls being undercut, as shown at 19, the said undercuts being of such depths that the portions of the side walls between the undercuts will correspond in length approximately to the distance be tween the opposite inner faces of the bearing members 5 and 6. The opposite end portions of the hollow grate bars are received by transverse recesses formed in the upper sides of the bearing members 5 and 6. By the provision of these recesses the hollow grate bars are held against lateral movement.

The hanger bars 13 are provided with notches 13 which are adapted to engage the basal edges of the hollow grate bars 16, whereby said grate bars 16 may be agitated.

By reference now to the drawings it will be seen that the smaller ends of the hollow grate bars are sealed with end Walls 20, the said smaller ends bearing on the smaller bed plate 6, while the opposite or larger ends are in alinement with the ports 8 of the larger bearing member 5.

The space between the opposite end portions of the side walls 17 and 18 of each of the hollow grate bars receives end pieces 21 and 22, the said end pieces corresponding approximately in width to the widths of the bearing members 5 and 6 and are so arranged that the upper surfaces will be in a plane with the upper edges of the side walls 17 and 18. The hollow grate bars are provided with pivoted closure plates 23 supported by the end pieces 21 and 22. Since these closure plates are all identical in struc ture a description of one will be suflicient. The vertical side of the bearing member 5 which is cut-away to receive the ends of the hollow grate bars, is indicated in dot-ted lines in Figs. 1 and 3.

By reference now to the drawings it will be seen that each of the closure plates is oblong in contour and cross section and corresponds approximately in length and width to the space between the end pieces 21 and 22 and side walls 17 and 18. The closure plates 23 are provided on their opposite ends and adjacent to one side with pintles 24 which are received by openings in the opposed inner ends of the end pieces 21 and 22. The closure plates are somewhat greater in thickness than the thickness of the end pieces and are so positioned that their upper surfaces will extend above the plane of the upper edges of the side walls 17 and 18. The upper faces of the closure plates are provided throughout their lengths with longitudinal V-shaped grooves 25 and formed in the lowest points of said grooves are a plurality-of spaced air inlet openings 26, which extend through the lower face of the closure plate. Extending beyond one end of the closure plate and adjacent to the side thereof remote from the pintles 24: is a stop 27, which enters a transverse recess 28 formed in the upper face of the bearing member 6, and serves to limit the downward movement of the closure plate.

In the operation of the device and when coal is to be used the operating rod 15 is moved until the tilting grate bars are at an angle to the bearing members 5 and 6. It will be obvious that the tilting grate bars will be turned to a greater angle to the bearing members 5 and 6 when furnace or large coal is to be used than when coal of smaller size is to be employed. lVhen wood is to be used as fuel the tilting grate bars are turned so that their opposite fiat faces will lie in a horizontal plane and in a plane with the upper edges of the side walls of the hollow grate bars. It will be seen, by reference to Fig. 1, that when the tilting grate bars are so turned, a substantially flat surface will be presented through the cooperation of the tilting and hollow grate bars. l/Vhen forced draft is used the air passes through the bearing member 5 thence through the ports 8 and into the hollow grate bars and upwardly through openings 26, air also passing through the openings of the tilting grate bars from the ash pit. Air flowing through the conduit 7 in the chan nel iron bearing member 5 will pass through the openings 8 into the hollow grate bars and flow through the openings 26 thereof.

By the provision of the pivotal closure plates it will be manifest that the hollow grate bars may be cleaned in an expeditious manner after the closure plates are moved upwardly and outwardly.

From the foregoing, it is evident that I have provided a device which is comparatively simple in structure and inexpensive in manufacture, embodying few parts and these so arranged that the danger of derangement will be reduced to a minimum.

I claim A grate comprising end supporting members, one of said members being a channel iron providing an air conduit, hollow grate bars provided with a series of openings therein, the side wall of said end supporting member being cutaway to receive the ends of said hollow grate bars, said grate bars being under-cut at their ends to prograte bars, and means for operating said vide end extensions overhanging the said hangers to tilt said second grate bars. I 10 side wall, said grate bars provided with In testimony whereof I aflix my signature. closures pivotally supported by said end exin presence of two witnesses.

tensions, a series of grate bars pivoted be- ARTHUR W. WVOOD. tween said hollow grate bars, hangers con- \Vitnesses:

nected with said grate bars and provided MERRILL ABRAMsoN,

with notches adapted to engage said first D. CLINTON DYER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.

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