US91999A - Improvement in grates for steam-generator and other furnaces - Google Patents

Description

B. T. ,BABBlTI I Furnace Grate. No. 91,999. i Patented June 29.1899.

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BENJAMINrartrr, or NEW YORK, N. Y.

Leners Patent No. 91,999, auml .mme 29, 1869.

The Schedule referred to in these Letters Patent and making part of the same.

To all whom itmay concern Be it known that I, BENJAMIN TQBABBITT, of the vcit-y, county,and State of New York, have invented a new and useful Improvement in Fire-Grates, and that the Vfollowing is a full, clear, and exact description ofthe same, reference being had to the accompanying drawing, forming part of this specilication, in Which- Y Figure 1 represents a' plan of a nre-grate, constructed in accordance with my improvement.

Figure 2, a section of the same, throilgh the line :c a: in tig. l, and

Figure 3 a'sectiou through the line z z.

Figure 4 is a plan ot' a grate, in part, constructed in accordance with the invention, with the circulating pipes shown in previous figuresomitted. i

Similar letters of reference indicate corresponding parts. Y v

My invention consists in a novel construction of tubular grate, for the. circulation or passage ot water through it, whereby not only is a large water-heating surface secured, and the grate, by being kept cool, restrained from burning out, but its durability enhanced against injury or brealflage by expansion and contraction ot' its parts, and the structure, 'to secure these advantages, may beV got up cheap.

Said grate is more particularly designed for use in steam-boiler furnaces, but is applicable to other fireplaces, and more especially wherever a supply of' heatl ed water is required. Itwill sulhce here, however,

todescribethe invention as a water-grate for steamboiler furnaces.

Refer-ling to the accompanyingr drawing, the grate proper,as made up of an intermediate or central hollow bar, A, and hollow branch bars, B, is or inay be made oia single casting.

' The branch-bars B are arranged to project-at right angles from 4the central bar, on either side ot' it, and.

disposed `to lie parallel toeach other, :1t-suitable distances apart, said branch-bars being in open communication at their inner ends with the main bar, but ciosed at their outer ends, as shown in iig. 4, excepting where circulating-pipes are used in addition, as will be hereinafter explained.

` The passage or circulation of' water through-the grate is vestablished by introducing it under pressure, as for instance, by the action of a punip, into the one end ofthe main bar A, as by a pipe, C, arranged below the grate, and after circulating through the branch-bars B, allowing it to escape, 'as by an outlet, D, and. connecting-pipe, from the opposite end of the main bar into the boiler or other place of discharge. A A grate thus constructed may be rgot up clleap, and

presents an extensive water-heating surface, which not only is productive of economy as regards feed of previously-heated water to the boiler, but also as regards the durability of the grate by the cooling provision whichis made throughout the whole body of the structure' But an im poltant characteristic of this grate is the freedom for independent expansion and contraction, in direction of their length, of the several bars of which the grate is composed, by reason of said bal's being let't free or disconnected ti'oin each other at their outer ends, whereby all tendency to injury or breakage, from irregularity of expansion and contraction, is

avoided.

To enlarge or promotethe free circulation otwater through the grate without injuriously or seriously at'- tecting this characteristic of its construction I connect any or all of' the lu'anch-bars, B, at their 'outer ends, with the supply-pipe C, bybent wroughtfiron, copper, or other suitable and comparatively flexible tubes, a, which, while serving to produce circulation, do not inipede, 'to any practical extent, the independent expansion and contraction of the several bars that are still disconnected from each other at their outer ends.

1What is here claimed, and desired to be secured by Letters Patent,VV is- 1. The construct-ion ot' the grate, consisting of' the hollow main bar A, provided with suitahle'inlet andoutlet-passages for establishing'iiow of water through the grate and hollow side or brauch-bars, B, left free or disconnected from each other at their outer ends, and in conununication with the main, bar at their inner ones, substantially as specified.-

2. lhe combination, with the hollow main and branch-bars A and B, constructed and arranged-substantially as specified, of' the bent tubes a, made of more flexible metal than the bars, substantially 'as Specified' n 'T BABBITT NitnrA "s Y ll an. HAYNES, J. W. GooMBs.

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