Improvements in Furnace or Grate Bars.
Year: 1894

page_text: Date of Application, 14th Apr., 1894
Complete Specification Left, 9th Jan., 1895-Accepted, 9th Feb, 1895
PROVISIONAL SPECIFICATION.
Improvements in Furnace or Grate Bars.
We, THOMAS HUGHES of 53, West Square St. George's Road, Blackfriars
in the County of Surrey, Engineer, and HoWARD RUDULPH JUSTICE of
55 and 56 Chancery Lane, in the County of Middlesex, Engineer do hereby
declare the nature of this invention to be as follows:-
2
This invention relates to furnace or fire bars, and the object is to produce
bar which will permit a large portion of the under surface of the fuel to be
open to the air draught.
To this end it is proposed to cast or form the bars with the main rib of a
downward taper in cross section, and to supply such bars with a series of side
wings preferably set at an angle and also of a taper or double taper cross section.
When the bars are set in the furnace they are so arranged that the space between
any two wings is opposite to a wing on the bar next in order.
With this construction about one-half to two-thirds of the under surface of
the fire bed is open to the draught and the wings act as species of baffle plates
preventing said draught from passing directly to the rear of the furnace and
causing it to be more evenly distributed than is usual.
The furnace bars may be set with all the wings inclined in one direction or
the alternate bars may have the wings inclined in a reversed direction to those on
the bars next in order.
Dated the 14th day of Anil 1904
PHILIP M. JUSTICE,
55 & 56, Chancery Lane, London, Chartered Patent Agent,
For the Applicants.
Improvements in Furnace or Grate Bars.
We, THOMAS HUGHES of 53 West Square, St. George's Road, Blackfriars,
in the County of Surrey, Engineer, aud HoWARD RUDULPH JUSTICE of
55 and 56 Chancery Lane, in the County of Middlesex, Engineer, 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 furnace or fire bars, and the object is to produce a bar
which will permit a large portion of the under surface of the fuel to be open to
the air draught.
To this end it is proposed to cast or form the bars with the main rib of a
downward taper in cross section, and to supply such bars with a series of side wings
preferably set at an angle and also of a taper or double taper cross section.
When
the bars are set in the furnace they are so arranged that the space between any
two wings is opposite to a wing on the bar next in order.
With this construction about one-half to two-thirds of the under surface of the
fire bed is open to the draught, and the wings act as species of baffle plates

page_text: preventing said draught from passing directly to the rear of the furnace and
causing it to be more evenly distributed than is usual.
The furnace bars may be set with all the wings inclined in one direction, or the
alternate bars may have the wings inclined in-a reversed direction to those on the
bars next in order.
To clearly explain the invention reference is made to the accompanying drawings
which form part of this Specification, and in which :-
Fig. 1 represents a side view of a grate bar made in accordance with this
invention.
Fig. 2 is an end elevation on line x―x.
Fig. 3 is a bottom view of two bars.
Fig. 4 is a top or plan view of same.
Fig. 5 is a side view showing a more pointed or V shaped form of wing.
Fig. 6 is an end elevation on line y-y.
Fig. 7 is a bottom view, and
Fig. 8 a top view of this form of bar.
In both forms of bar the web A has a downward taper while the wings B are
shown with both a downward taper in cross section and an inward taper from their
outer top edge toward the lower part of the web. This construction presents a
large air surface between the wings which as stated act as a species of baffle plates
for the draught.
The wings need not always be formed with a double taper as a single downward
taper will in some cases be sufficient; nor need the web always have the downward
taper, although the form shown is deemed the most effective."
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is :-
1. The improvements in furnace or grate bars which consist in providing the
web with a series of wings of taper or double taper cross section, substantially as
described.
2. The improvements in furnace or grate bars which consist in forming the web
of a downwardly decreasing cross section, and providing same with wings of a
taper or double taper cross section, substantially as described.
3. The improvements in furnace or grate bars formed and arranged substantially
as described and as illustrated in the accompanying drawings.
Dated the 9th day of January 1895
PHILIP M. JUSTICE,
55 & 56, Chancery Lane, London, Chartered Patent Agent,
For the Applicants.
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