Improvements in Fire-bars.
Year: 1894

page_text: Date of Application, 18th Apr., 1894-Accepted, 2nd June, 1894
Improvements in Fire-bars.
A communication from JEAN WAGNER, of Paris, France, Engineer.
I, GEORGE CLEMENT DOWNING of 8 Quality Court, London, W.C. Patent
Agent, do hereby declare the nature of my said 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 this invention is to construct fire-bars in two parts in such a manner
that the air may circulate around and between such parts.
And in order that this invention may be particularly described and ascertained
reference is hereby made to the accompanying drawings, in which similar letters of
reference indicate corresponding parts.
Fig. 1 is a longitudinal view of a part of a fire bar constructed according to the
invention.
Fig. 2 is a plan view of Fig. 1.
Fig. 3 is a section on the line 1-2 of Fig. 2.
Fig. 4 is a modification of Fig. 3.
Fig. 5 is a perspective view of a fire bar showing one part raised above the
other part for cleaning purposes as hereinafter described.
a. b are the two parts forming the fire bar, constructed with pyramidal blocks c. d,
in such a manner that the blocks c coincide with the openings between the
blocks d as shown in Fig. 2. The pyramidal blocks c d are cast in one with
the blades ef respectively suitable distance pieces or blocks g being cast on each
part of the bar to prevent contact of the pyramidal blocks c with d. In order to
prevent the two parts of the bar shifting longitudinally, one or more of the
pyramidal blocks are cast of a size sufficient to occupy the space between two of
the blocks. Thus it will be seen that each fire-bar is composed of two parts a
and b between which the air circulates to the fuel, passing between the blades e f
and the blocks cd. In some cases I form a recess in the sides of the pyramidal
blocks to minimise the shrinking of the cast metal and to prevent the pyramidal
blocks becoming too hot this modification is shewn in Fig. 4.
For the purpose of cleaning the bars, motion is imparted to the parts a and b by
any well known means, whereby each part is alternately lifted above the other as
shewn in Fig. 5, such motion causing a shearing or crushing action to take place
between the blocks c and d thereby removing any cinders or other refuse that may
adhere thereto, and at the same time causing the ashes to fall between the parts of
the bar to the ash pit.
By the use of this invention the fire is supplied with a greater quantity of air
than with those in which the ordinary single fire-bars are used thus keeping the
fire-bars relatively cool and preventing the adherence of clinkers and similar
substances. In use, two currents or channels of air are caused, a vertical current
between the blades and blocks composing the fire-bar and a horizontal current
between the upper parts of the blocks c and d. The fire-bars constructed according
to this invention require no special manipulation or particular care in use and
conform to all the conditions required to obtain a thorough and regular combustion
of the fuel and is readily applicable to all furnaces.

page_text: 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
1 claim is :-
1. A fire-bar formed of two parts, constructed and operating substantially
as and for the purposes hereinbefore described and illustrated by the drawings.
2. A fire-bar formed of two blades having a series of inverted pyramidal blocks
cast in one therewith so arranged that the pyramidal blocks of one blade coincide
with the spaces between the blocks of the other blade, there being no contact
between such blocks substantially as hereinbefore described and illustrated by the
drawings.
3. The improvements in fire-bars substantially as hereinbefore described.
10lנית
A
11004
GEORGE C. DOWNING.