Improvements in Fire-bars.
Year: 1888

page_text: Date of Application, 2nd Nov., 1888
Complete Specification Left, 30th July, 1889-Accepted. 31st Aug.. 1x89
PROVISIONAL SPECIFICATION.
Improvements in Fire-bars.
I, JAMES FARMER REYNER, of 174 Blue Bell Hill, Nottingham, in the County of
Nottingham, Pattern Maker, do hereby declare the nature of this invention to be as
follows:-
This invention has for its object the improvement of fire-bars used in furnaces; the
improved bar is made in the form of a stout transverse or horizontal metal plate, having on
its under-side a pair of deep vertical webs arranged at a regular distance from each other;
each of these webs is fixed on the horizontal plate at a certain distance from the lateral
edge so that when two or more bars are placed next each other, a large air-space is
left between each the webs have a portion cut out at each end of the bar, so that
each end may rest conveniently on the bearers allowing a very free admission of air
underneath.
The horizontal metal plate is constructed with two longitudinal fluted grooves on
its upper surface, each groove being above the aforementioned webs and these two
longitudinal grooves are connected with each other by a series of cross grooves, one
between each perforation to be immediately described; the purpose of these grooves
is to retain fine ash or dust and likewise effectually to prevent the adherence of
clinkers.
The horizontal metal plate or bar is perforated vertically with a number of holes or
apertures arranged preferably across the bar; these perforations are preferably made
conical in section the base of the cone being downward. in order to allow air to ascend
and also dust and ash to fall away easily. Each bar has preferably a single series of
entire apertures down its middle, and each of its two lateral edges projecting beyond the
webs has an alternato series of half-apertures, which are completed into entire
apertures when placed next to another bar.
The advantages claimed for the fire-bar are:-that air entering underneath circulates
freely through the holes in the horizontal metal plate, ensuring very perfect combustion
of fuel and thus economy of the same, and production of steam. The improved fire-bar
being also of great width, and by reason of the vertical webs, is of great strength and
altogether prevents bending or twisting. By the free admission of air throughout the
bar, the liability of the shoulders or ends to burn away, in completely obviated.
Dated this 1st day of November 1888.
COMPLETE SPECIFICATION.
Improvements in Fire-bars.
I, JAMES FARMER REYNER, of 174 Blue Bell Hill, Nottingham, in the County of
Nottingham, Pattern Maker, 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 is concerned with the improvement of fire-bars, or furnace-bars used
in constructing the grates of boiler and other furnaces; the improved fire-bar will be
described with reference to the annexed sheet of drawings in which Fig. 1 represents
a side elevation of an improved bar, Fig. 2 a plan of the same, and Fig. 3 a
cross section of the bar supposed to be made along the line ab in Fig. 2.
The improved fire-bar consists of a strong horizontal rectangular plate of metal m,
having two vertical metal webs w, projecting from its underside at a uniform distance
from one another; these metal webs to, are situated at some distance from the lateral
edges of the fire-bar, in order to ensure a large air-space between any two fire bars when
Prins 6d 7

page_text: they are placed in opposition: the metal webs w, are or have a portion cut away at
each end of the bar so as to allow each extremity e, to rest conveniently upon the
bearers permitting at the same time a liberal.supply of air underneath between the
webs.
•
The horizontal plate of metal m, is according to this invention variously fluted,
channelled, or grooved upon its upper surface, and is perforated with a series of
openings or apertures which may be differently-arranged: In this example the upper
surface of the metal plate m, has two shallow longitudinal grooves or channels g,
extending from end to end, each being here situated above the webs w; uniting
these longitudinal grooves g, are a number of similar grooves or channels gl, arranged
transversely or across the bar. To each outer side of, and joining the longitudinal
grooves g, are grooves g², similar to the grooves gl, but alternate with them, and these
grooves or channels g², are so arranged as to form complete grooves equal to the
grooves g', when any two fire-bars are placed next to each other. The grooves, flutings,
or channels described, may be of any form, but are preferably of semi-circular section,
their function is to receive fine ash or dust, and by the mediation of a fine layer of this
ash, completely to prevent clinkers from adhering to the bar. The boundaries of tho
aforementioned grooves, are represented by broken lines in Fig. 2 of the annexed
sheet of drawings.
The metal plate m, is. provided in this example with a longitudinal serios of holes or
apertures h, along its middle from end to end, of preferably oval or approximately
oblong outline, the greater dimensions of the aperture being placed across the bar; an
analogous series of half-apertures ', alternating with the apertures h, on each sido
where the metal plate m, extends boyond the webs w, form a complete series when
'arranged in position next to the similar ones of another fire-bar. Those apertures are
made preferably wider on the underside of the bar, tapering to the upper surface of
the bar.
The construction of the improved fire-bar hereinbefore described provides for an
abundant. supply and circulation of air in the furnace, promoting complete oxidation of
the fuel.and obviating the liability of the shoulders or ends of the bars to burn away:
the air enters underneath the fire-bars, passes between. the webs w, and upwards
through the perforations .or. apertures h, of the bars, and dust and ash fall away through
theso apertures. The improved bar is very wide, its great strength and solidity
entirely preventing liability to distortion.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what 1
claim is:
1. The arrangement of channels, flutings, or grooves (91, 9²) across the upper
surface of the fire-bar; substantially as hereinbefore described with reference to the
accompanying sheet of drawings.
2. The construction of the ends or shoulders (e) of the fire-bars whereby they are
recessed, or a portion cut away so that the fire-bar may rest conveniently upon its
bearers or supports, allowing at the same time a free passage to air between the:
shoulders and upwards through the perforations in the bar, thus preventing the ends
or shoulders of the fire-bar from burning away, substantially as hereinbefore described
with reference to the accompanying sheet of drawings.
3. The arrangement of a series of notches or half-apertures (h) along the two sides
of the plate (m) of the fire-bar which are completed into entire apertures when two
fire bars are placed next to each other, thus securing additional admission of air
through the bars, substantially as hereinbefore described with reference to the accom-
panying sheet of drawings.
Dated this 27th day of July 1889