Improvements in Furnace Fire-bars.
Year: 1897

page_text: Date of Application, 3rd May, 1897-Accepted, 5th June, 1897
COMPLETE SPECIFICATION.
( . ) Improvements in Furnace Fire-bars.
I, FREDERICK. WILLIAM GOLBY, of 36 Chancery Lane, in the County of
Middlesex, Patent Agent, do hereby declare the nature of this invention and in
what manner the same is to be performed, as communicated to me by Otto Arlt,
of 13 Salomonstrasse, Goerlitz, Germany, Chief Clerk, (Head of an office), to be
particularly described and ascertained in and by the following statement:-
This invention relates to a new furnace fire-bar, so constructed as to secure an
advantageous utilisation of the fuel and to effect practically smokeless combustion
by a suitable direction of the flame and the introduction of a constant current of
heated air to the grate. The fire-bars which form the subject of this invention are
distinguishable from others having the same object by the fact that the effect
referred to is obtained by means of separate fire bars, so that any overheating,
twisting or the like, which renders hitherto known appliances unserviceable in a
short time, is entirely obviated. If a furnace-bar should prove to be damaged after
a long time, the replacing or interchanging of the same can be effected with the
greatest ease, without damaging the whole arrangement of the grate as has been
the case hitherto.
In the accompanying drawing
Fig. 1 is front elevation of the new ſurnace fire-bar ;
Fig. 2 is a cross-section of the same taken on the line a;. and
Fig. 3 shows the method of grouping together and the manner of supporting the
several fire-bars.
Fig. 4 shows a modification.
Referring to Figs. 1 to 3 the new furnace fire-bar presents outwardly the form
of a regular pentagon open beneath and has a T-shape cross-section. The piece.a
forms the head or top of the bar, and is furnished throughout its length on one side
with a groove band on the opposite side with a projection c corresponding with the
groove b so that, when several bars are put together the heads or tops a thereof
form a continuous surface the projection c of one bar lying in the groove b of the
next. The T-shape cross-section of the bar is broken about half way in the
height of the vertical side of the pentagon and from thence is continued to
the bottom as a simple flat cross-section, so that vertical open spaces d are formed
between the separate bars as shown in Fig. 3. The fire-bars are built in the
furnace at right angles to the longitudinal axis and are provided with apertures f
and 9 formed in the upright parts e by means of which they may be pushed on to
and held in position in the furnace by rod-shaped bearers and i which latter are
fixed in a suitable manner in the front and back ends of the furnace.
As regards the length of the fire-bars; these do not by any means occupy the
whole breadth on the furnace, but merely a part thereof, so that the ordinary firc-.
bars can be fixed in the known manner in the furnace grate at about the height of
the holes and at both sides of the new fire-bars.
g
The action of the new fire-bars is as follows;-The air constantly entering freely
through the under open side is heated and passes through the open spaces d into
the body of the furnace. In consequence of this constant and abundant supply of
air an extraordinarily sharp fire is produced on that part of the grate which is
formed in the usual manner and situated on both sides of the new fire-bars. The
flames from this fire conducted through the saddle-shaped upper part of the new

page_text: furnace bars, are pressed against the sides of the fire-tubes, and cross one another,
whereby the small particles of coal carried along therewith fall back into the
glowing fire.
The saddle-shaped upper part of the new bars may be rounded off as shown in
Fig. 4, so that it will assume substantially the shape of the letter U or of a
horse-shoe.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is ;-
1. Furnace fire-bars made in the shape of a regular pentagon (Fig. 1) or of the
letter or a horse shoe (Fig. 4) open underneath and having a T-shaped cross-
section, and in which the ends of the heads or tops a of the fire-bars when placed
together at right angles to the longitudinal axis of the furnace engage with one
another by means of a wedge or projection c in one bar fitting a groove b in the
next, the lower part of the vertical sides of the bars being made of plain cross-
section so that open spaces d are formed between adjacent bars for the purpose of
introducing a strong, steady current of heated air to the interior of the furnace,
substantially as described and illustrated in the accompanying drawings.
2. A furnace fire-bar of the kind mentioned in Claim 1 hereof formed with
apertures and in the upright parts e by means of which they can be pushed on
to and held in position in the furnace by fixed rod shaped bearers hand i
substantially as described and illustrated in the accompanying drawings.
Dated this 3rd day of May 1897.