US1232897A - Grate for marine and stationary boilers. - Google Patents

Description

Patented. Jill 10, 1917.

padaz.

W. C. CODD.

GRATE FOR MARINE AND STATIONARY BOILERS.

APPLICATION FILED NOV. 17, 1915.

WWW

WILLIAM 0. Q0131),

OF BALTIMORE, MARYLAND.

GRATE FOR MARINE AND STATIONARY BOILERS.

Specification of Letters Patent.

Patented July It), 191?.

Application filed November 17, 1915. Serial No. 62,037.

To all whom it may concern:

Be it known that I, \VILLIAM C. Conn, a citizen of the United States, residing at Baltimore and State of Maryland, have invented certain new and useful Improvements in Grates for Marine and Stationary Boilers; and I do hereby 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.

The invention relates to improvements in grates for marine and stationary boilers.

The object of the present invention is to improve the construction of grates and to provide a simple, practical and comparatively inexpensive grate of strong and durable construction adapted to afford an increased amount of air space between the grate bars and provided with means for admitting air to the ends of the grate bars to avoid any dead areas in the grate and to in crease the combustion of the fuel.

A further object of the invention is to pro vide a grate of this character having projections or teeth adapted to discharge or dump ashes more readily and constructed to deflect the fire tools so as to reduce to a minimum liability of breakage of the grate bars by said fire tools.

With these and other objects in view, the invention consists in the construction and novel combination and arrangement of parts hereinafter fully described, illustrated in the accompanying drawing and pointed out in the claims hereto appended, it being understood that various changes in the form, proportion and minor details of construction may be resorted to without departing from the spirit or sacrificing any of the advantages of the invention.

In the drawing:

Figure 1 is a plan view of a portion of a grate constructed in accordance with this invention Fig. 2 is a side elevation of the same,

Fig. 3 is a transverse sectional view,

Fig. 4t is a plan view of a single grate bar,

Fig. 5 is a detail longitudinal sectional view of a portion of one of the grate bars,

Fig. 6 is an end elevation of the same.

Like numerals of reference designate corresponding parts in the several figures of the drawing.

In the accompanying drawing in which is illustrated the preferred embodiment of the invention 1 designates a grate bar consisting of a body portion provided at the side edges with projections 2 and having terminal proj ections 3 which are rounded and beveled at their upper edges at l to deflect the fire tools and also to cause the projections to have a tendency to drop the ashes and enable the same to be more readily discharged from the grate bars. The projections 2 and 3 are preferably semi-circular or semi-elliptical and the grate bar is provided with correspondingly shaped recesses l between the projections. the side projections of the grate bars and also the end projections being alternately arranged so that the projections of one grate bar will be located opposite the recesses of the adjacent grate bar to form a substantially serpentine or wavy intervening space for the passage of air, whereby a greater air space is afforded than is possible with straight grate bars. The grate bar is also provided when desired with openings 5 extending longitudinally of the grate bar and arranged at intervals and having projections 6 and intervening recesses 7. the projections at one side of the openings being located opposite the recesses of the opposite side to provide a serpentine or wavy opening. The grate bars may be made of any de sired width and when relatively wide grate bars are employed they are designed to be provided with a plurality of longitudinally disposed grate flanges 8 of suflicient number to eifectively prevent the grate bar from warping.

The grate bars are provided at the end projection with notches 9 extending longitudinally of the grate bars and adapted to afford passage of air to the ends of the grate bars to prevent dead spaces and to secure more perfect combustion at the terminal portions of the grate bars. The end notches 9 may be tapered downwardly, as illustrated in Fig. 5 of the drawing to tend to discharge the ashes but the side walls of the notches 5) maybe vertical and parallel if desired. The grate bars are provided in their upper faces with longitudinal grooves 10, which extend the entire length of the grate bars as shown.

The intervening spaces between the grate bars and the sides of the opening of the body portions of the grate bars are designed to be made according to the character of the fuel employed for heating the boiler with which the grate bars are to be used. a relatively small separation of the bars being provided for fine pea coal and a greater separation for larger coal and soft coal.

lVhat I claim is:

1. A grate of the class described including grate bars provided with side and end projections arranged at intervals to form intervening recesses and rounded at their ends and beveled at their upper edges, the recesses conforming substantially to the configuration of the projections, and the projections at the sides of the grate bars being arranged opposite the recesses of the adjacent grate bar, said grate bars being also provided at intervals with longitudinal openings having rounded projections and intervening recesses corresponding to the shape of the said projections and alternating with the same, serpentine or wavy-spaces being formed in teriorly and eXteriorly of the grate bars.

2. A grate of the class described including grate bars provided with side and end projections arranged at intervals to form intervening recesses and rounded at their ends and beveled at their upper edges, the recesses conforming substantially to the configuration of the projection, and the projections at the sides of the'grate bars being arranged opposite the recesses of the adjacent grate bar, said grate bar being also provided at intervals with longitudinal openings having rounded projections and intervening recesses corresponding to the shape of the said projections, and alternating with the same, serpentine or wavy spaces being formed interiorly and exteriorly of the grate bars and the terminal projections having narrow oblong notches extending longitudinally of the grate bars and tapered in width from the lower faces of the projections to the upper faces ofthe same to provide downwardly diverging inclined side walls to effect a discharge of ashes into the ash pit.

I In testimony whereof I affix my signature in presence of two witnesses. 7

WILLIAM G. CODD. Witnesses WILLIAM Hissnr, J11, F. Ml. I-IIssnY. 7

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, 1). C.

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