US561627A

US561627A - tibbitts

Info

Publication number: US561627A
Authority: US
Publication date: 1896-06-09
Anticipated expiration: 1913-06-09

Description

(No Model.) 2 Sheets-Sheet 1,

I. R. TIBBITTS, W. A. MADISON & G. J. ALLEN. FURNACE GRATE FOR STEAM BOILERS.

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. W I 291491777018. %%aq @2 I a .23, %M% f .xflZ/u UNITED STATES PATENT Orricn,

FRANK R. TIBBITTS, \VILLIAM A. MADISON, AND CHARLES JQALLEN, OF CLEVELAND, OHIO, ASSIGNORS TO THE PLAYFORD ST OKER COMPANY,

or saint PLACE.

FU RNACE-G RATE FOR STEAM-BOILERS.

SPECIFICATION forming part of Letters Patent No. 561,627, dated June 9, 1896.

Application filed February 10, 1896. Serial No- 578,813- (lilo model.) I

To all 1071 0722, it may concern.-

Be it known that we, FRANK R. Tresrrrs, WILLIAM A. Emerson, and CHARLES J. AL- LEN, citizens of the United States, residing at Cleveland, in the county of Ouyahoga and State of Ohio, have invented certain new and useful Improvements in Furnace-Grates for Steam-Boilers, of which the following is a specification.

This invention relates to f urnace-gratcs for steam-boilers, and the class to which it belongs is that of traveling grates; and the improvements consist, first, in the peculiar construction and adaptation of the grate-carriage, whereby two or more rows of grate-bars are carried by simply increasing the width of the carriage without additional leg-supports, thus providing ample space for the under back travel of the grates; second, in the peculiar construction and application of the grate-bars, whereby the bars are made interchangeable or reversible and are quickly and readily removed and replaced, each bar be ing so constructed that it requires but one bolt to fasten it, the objects of the invention being to simplify and facilitate the construction and application of such grates.

In the accompanying drawings, Figure l is a cross-section of the carriage and boiler-setting on the line of the front shaft, showing the construction and arrangement of the grate-bars and their middle support. Fig. 2 is a longitudinal section of the grate-carriage on line 2 9 of Fig. 1, showing the middle grate and link supportiug bar. Fig. 3 is atop view of the front end of the grates, showing the arrangement of the inner or abutting ends of the grate-bars, their means of attachment and support. Fig. 4 is a top view of one of the inner links. Fig. 5 is an end view of said link. 6 is a top view of one end of a grate bar. Fig. 7 is a side view of the same, showing the attaching-hook. Fig. 8 is a sec iional view of the same, showing the method of attaching the inner or hook ends of the grate-bars to the links.

A A represent the two side frames of the grate-carriage. B B are intermediate crossbeams bolted to and joining said side frames.

C- C are shafts having their bearings in the top corners of the side frames, the forward shaft extending through the side plates of the front of the boiler-setting, on one end of which power is to be applied for operating the grates.

E E are sprocket-wheels fixed on the shafts for carrying the grates. Two of said sprocket wheels are placed on the middle part of the shafts, so that two rows of grate-bars may be employed, the object beiu g to use short bars to avoid warping.

G is a central yoke-bar having eyes in each end, through which the shafts pass, but is not supported thereon, as the said bar rests upon the intermediate cross-beams B B. The ends of the bar G are located between the middle sprockets E E on the shafts and serve as a support for the middle chain-links in the travel of the grates from the front to the rear of the carriage.

Bearing-plates F F are attached to the bar G as Well as to the side bars A A of the carriage-frame to provide a raised track or sur- 7 face on a level with the tops of the sprockets for the links of the chains to slide upon.

The links H H of the inside chains are provided with curved sockets or mortises I, and the inner ends of the grate-bars are provided with quadrant pins J, which are inserted into said inortises for holding the inner ends of the grate-bars to the links, as illustrated in Figs. 4, 5, 6, 7, and 8. and quick means of attaching the inner ends of the gratebars, which is performed by holdin g the grate-bar in a perpendicular position, as seen in dotted lines in Fig. 8, for inserting the point of the hook into the m ortise, and then turning the bar down in the horizontal position, thereby completely inserting the hook. Now the outer end of the bar thus placed is secured to the outer chain-links by a single bolt.

From the foregoing it will be seen that two or more rows of grate'bars may be applied to and operated on a carriage-frame having only four legs, and that the grate-bars may be very quickly and easily attached or removed by the use of a single bolt for each bar, thus enabling quick replacement of bars for repairs, die.

This makes a simple Having described our invention, we claim as follows:

1. In endless traveling grates for furnaces, the combination with carriage A having crossbeams B B, a central yoke-bar G supported on said cross-beams and having eyes in each end through which the shafts C pass, of two or more rows of grate-bars supported on the chain-links H II, the adjacent inner ends of the grate-bars and chain-links supported and sliding on the yoke-bars G, substantially as described.

2. The links H H having curved mortises I, the grate-bars having the quadrant pins J, adapted for securing one end of the grate- I 5 bars to the chain-links, substantially as and for the purpose set forth.

FRANK R. TIBBITTS. WILLIAM A. MADISON. CHARLES J. ALLEN.

Witnesses GEO. W. TIBBITTS, MAX P. GOODMAN.