Improvements in Furnace and similar Bars.
Year: 1893

page_text: Date of Application, 25th Jan., 1893—Accepted, 25th Feb., 1893
COMPLETE SPECIFICATION.
Improvements in Furnace and similar Bars.
We HARRY NEWBY and SAMUEL NEWBY, Ironfounders 36 Loveday Street,
West Bromwich Staffordshire 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 :-
This invention relates to improvements in furnace and similar bars, and has for
its object to economise fuel, and ensure complete and perfect combustion over the
whole surface of the bars whilst from their peculiar construction the bars will not
buckle, bend or warp, through unequal contraction and expansion. The nature of
the said improvements are fully illustrated in the accompanying drawings.
Figure 1 is a plan of the bar; Figure 2 is a side elevation; Figure 3 is an end
elevation Figure 4 shows a portion of one of the bars drawn in perspective.
As represented in these drawings the body or top portion of the bar A is divided
up into helical or V shaped segments or blocks, A' by slots B, the blocks being
affixed to the understay or web of the bar C during the process of casting.
These segments or blocks and the alternate slots may be made semi-circular
instead of shaped but we prefer the latter as shown on drawing, as by forming
the blocks this shape, they are more firmly attached to the web, and therefore less
liable to be broken off by an accident.
In order that a greater quantity of air may pass through the bars, and that the
fuel may thereby be entirely consumed, and to secure the ultimate combustion of
smoke and inflammable gases in the flues, and also to prevent the ashes accumulating
and choking the air spaces; we make the size of these blocks A' to taper underneath,
until they reach the understay or web of the bar C. By making the blocks A¹ the
shape shown in the drawing, it causes the slots or air spaces B to run in a zig-zag
form across the grate or furnace, when the bars are placed side by side in the
usual form, and prevents a long straight slot running transversely or diagonally
across the grate in which case a considerable portion of the fuel falls into the ash
pit unconsumed. By making the spaces B as described the air is distributed
equally over the whole surface of the fire. As these bars are made various lengths,
and being set in the ordinary manner, they may, by altering the shape of the
ends A & A and using bars of different lengths, be adapted to furnaces of various
shapes and by uniting together the ends A* of 2 or more bars, during the process of
casting they may be made multiple bars such as are often used in marine locomotive,
& other steam boilers. This may be further extended until the whole of the bars
necessary to form the grate of one furnace may be cast in one piece.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
1st. In furnace and similar bars, the surface of which is divided alternately into
small blocks A', and air spaces B, free combustion is allowed to take place over
the whole surface of the bar, which also prevents clinkers forming upon the bars,
substantially as illustrated and described.
2nd. By causing the slots or air spaces B in the surface of the bar to run in a
zig-zag manner transversely across the grate, a larger quantity of air is admitted to
the fire, and also more equally distributed over the surface of the bars, thereby
securing better combustion, and also preventing unconsumed portions of fuel falling
into the ashpit, thus effecting a great saving in coal coke, or other firing material
substantially as described.
3rd. In furnace and similar bars, the construction of which allows for the

page_text: expansion and contraction due to the fire, the buckling or bending as in other bars
is prevented, thereby adding to their durability, substantially as illustrated and
described.
HARRY NEWBY.
SAMUEL NEWBY.