US99640A - Henry collinson - Google Patents

Description

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'HENRY COLLINSON, 0F DORCIIESTER, ASSIGNOR T0 HIMSELF AND N. M.

HAZEN, or ANDovna, MASSAGHUSETTS.

Lasers Patent No. 99.640. dated February s, 1ero'.

IMPROVEMENT IN GRATE-BARS Mps- The Schedule referred to in these Letters Patent and making part of the same.

To all whom it mar/y concern:

p Be it known .that I, HENRY CoLLINsoN, of Dorchester, in the county of Norfolk, and State of Massacllusetts,1 have invented certain new and useful Ixnprovements in Furnace-Grates; and I do hereby del 4 To enable others skilled in the art to construct and use my invention, I will proceed to describe it.

Myinvcntion relates to grates for furnaces; and The invention consists in a novel manner of constructing the same, whereby one part can be operated independent of the rest, and a part or the whole can be removed or replaced at pleasure, without disturb- -ng` the-brick-work of the furnace, as hereinafter more fully explained.

Figure l is a top plan view of a furnace-grate, on my plan;

Figure 2 is a cross-section on the line x-z of iig. 1;

Figuref, a similar View ou the line z-'z of iig. l; and

Figure 4 are viewsl of the pieces composing the frame, detached.

'lhe ordinary method of constructing furnace-grates for locomotives,steamboats, and steam-engines, is to make the whole grate stationary, the bars being detachable, but 'not otherwise movable, so that when it is desiredto clear or clean the grate, it becomesnec-l essary, generally, to open the furnace-doors, thus admitting a draught'of cold' air, which .lowers the tempelature, and thereby the pressure of the steam.

When brick-work is used, it is also customary to set the frame in'the same, in such a manner, that when it is desired to change the same, more or less of the brick-work has to be torn away, and then rebuilt.

It is to remedy these diculties that my invention is designed; and to accomplish that object, I make thegrate proper of a series of frames or sections, D, rectangular in form, with journals at each end, so that they may be hung in a frame, in such a manner as to permit them to be rocked or shaken, tilted or tipped.

These frames D may' be cast with recesses in their end-pieces, as represented at c, fig. 3, 'so that the bars e may rest loosely therein, to .permit them to expand or contract without injury to the 'amesD, and also lto be replaced when necessary.

These flames D, I make with a pendent or arm, I, at one end, Vso that any desired number of them may vbe connected by/ rods or bars o, as represented in figs.'

'2 and 3.

I divide the grate into two or more sections, according to its size,- au`d iu each section or part I mount a when desired.

series, two or more of the frames, D, with their bars e, inserted as represented in iig. 1. i

All the frames D in one part, I connect by a rod or bar, O, underneath, and the end of this lrod O, I counect by another rod, f, to a level', L, located outside of the furnace, so that by means of the lever all the frames or sections in one part of the grate may' be shaken or tilted, without opening the furnace-door, or disturbing those in the other part.

There may be any number of such parts or divis ions in the furnace, each series of Isections or frames D in the separate parts being connected and provided l with a separate lever, L.

To support these sections or frames, I construct the main frame of two ormore bars, B, the'ends of which rest loosely in suitable recesses made for them in the walls ofthe furnace, as representedl by No. l, fig. 4. The recesses in the walls are deep enough to allow the bar B to move lon These bars B, being formedwith recesses or notches provided with circular'recesses or notches, for the reception ot' the journals of frames'` D, the main frame is thus composed of a series of independent bars, each and allof which can bei removed or replaced at pleasure, without injuring or removing the'brick-work, and which also Apermits the various zparts to expand and contract without injury.

Any form of grate-bars may be used with .this arrangement. Inthis case I have represented the ordinary plain bar, one being shown detached, at No. 4of tig. 4, although it isobvious that'any other style may be used equally well. l

This plan of constructing and operating grates may be applied to all kinds of furnaces, its advantages being obvious to any one familiar with the subject of grates, as ordinarily used in furnaces.

Having thus described` my invention,

What I claim, is-

1.l A furnacefrate, consisting of two or more sections or nest-s o f frames, each of the frames being provided with loosely-fitting grate-bars, and so journalled and connected with the frames of the same section,

gitudi'nally,'so asto be removed

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