Improvements in Furnaces.
Year: 1890

page_text: COMPLETE SPECIFICATION.
[Communicated from abroad by ROBERT LOUDON WALKER, of Tremont Street, Boston,
Massachusetts, United States of America, Engineer.]
Improvements in Furnaces.
1, HENRY HARRIS LAKE, of the firm of Haseltine, Lake & Co. Patent Agents,
45 Southampton Buildings, in the County of Middlesex do hereby declare the nature
of this invention and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement :—
The object of my invention is to produce a furnace which saves fuel and prevents
smoke and my invention consists, first and mainly, in the combination of a deflector
with a grate one portion of which is shaken independently of the other portion.
and
In the accompanying drawings
Fig. 1 is a sectional view of a part of one. form of boiler embodying my invention
Fig. 2 is a section on the line 3-3 of Fig. 1.
Fig. 3 shows a modified form of furnace."
Referring to Figures 1 and 2 A A' is the grate, B the fire box, B the deflector and
D the ash pit.
Deflector B is so arranged in the fire box that it directs the products
of combustion arising from the duller or greener part of the fire on one section of the
grate over a brighter part of the fire on an independent section of the grate. It has
been found that by keeping a part of the fire much brighter than the rest of the fire,
the products of combustion which pass over this quickened portion of the fire are
consumed, smoke prevented and fuel saved. I accordingly form the grate in
sections A A and make one section A, over which products of combustion pass to the
flues, so that it can be rocked or shaken independently of the rest of the grate.
Section A is shown as a rocking grate of ordinary construction, capable of being
rocked by a rod a in the usual way. The rest of the grate may be either a rocking
grate or a stationary grate as shown at A in Fig. 1. By agitating section A' with
sufficient frequency to keep the coal on it much looser and freer than the coal on the
other part A of the grate, a much stronger draught is produced through section A¹
than through section A and when the products of combustion are doflected upon and
over this quickened fire by the deflector they are very perfectly consumed.
The results very perfectly obtained in the manner above pointed out may be obtained,
in some cases, by the construction now to be explained, the same principle being
involved in each form of apparatus.
In Fig. 3, A is a boiler, B a furnace, D) the fire-box, F F the ash-pit and G the
grate. The air blast chamber F is formed by a partition t dividing the ash-pit into
two chambers and a blast is introduced into the chamber by any suitable means,
preferably through a pipe t' which is introduced at any convenient place.
That portion of the grate which is over chamber F is a shaking or like grate to
keep the quick-burning fire thereon free from clinkers and to allow the accelerated
drauglit freer passage.
The ordinary draught is, as usual, through chamber of the ash pit and as tho
products of combustion, under the influence of this draught, pass towards the flues,
they pass over that portion of the fire which is quickened by the air-blast from
chamber F whereby the smoke and gases are very perfectly consumed, the products
of combustion arising from the greener part of the fire being directed by a deflector H,
mounted above grate G, upon the quickened portion of the fire.
Grate G preferably has its rear section so arranged that it can be shaken and
g is a convenient form of shaker. A door is usually located in the partition
separating chamber F from chamber F¹.

page_text: Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, as communicated to me by
my foreign correspondent I declare that what I claim is :-
First. In a furnace, the combination of a deflector with a grate made in inde-
pendent sections A A¹, the section A¹ being a shaking grate and the deflector being
arranged to direct the products of combustion arising from the fire on section A
over the fire on section A', substantially as and for the purpose set forth.
Second. In a furnace, the combination of a fire box grate and ash pit, divided
into two chambers, with a deflector and means, substantially such as described, for
example, a forced draught, for causing a draught through one part of the grate
greater than the draught through the other part of the grate, that part of the grate
through which the stronger draught passes being a shaking grate and the deflector
being arranged over the grate to direct products of combustion arising from the
fire on that part of the grate through which the weaker draught passes over the
fire on that part of the grate through which the stronger draught passes, substantially
as and for the purpose set forth.
Dated this 28th day of October 1890.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicant.