Improvements in or relating to Furnace Grates.
Year: 1895

page_text: Date of Application, 22nd July, 1895-Accepted, 24th Aug., 1895
COMPLETE SPECIFICATION.
Improvements in or relating to Furnace Grates.
I, RICHARD SLOANE RICHARDS, of 3 Mileage Station, Westbourne Park
Road, in the County of Middlesex, Coal Merchant, 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 :-
an
This invention relates to the use in furnaces of perforated plates of a special
construction in place of the fire-bars ordinarily used and is designed as
improvement on those plates described in Hall's Specification No. 2381 A.D. 1888
the construction being such that the clinker will spread over the surface and thus
form a covering which will protect the plate against the heat of the furnace.
In the accompanying drawings
Figure 1 is a plan of a portion of a plate constructed according to this invention
and
Figure 2 is a section of the same on the line Y Z.
A is the solid portion of the plate which is composed of metal, fire-clay or other
suitable material. B are the conical holes through which the air enters the
furnace. The upper surface of the plate A is recessed between the holes B in the
manner shown at C so as to leave the upper ends b of the said holes projecting up
above the level a of the plate proper each hole being surrounded by a rim or
nozzle D having preferably an easy curve from the upper level 6 of the top of the
hole B to the lower level a of the surface of the plate or bottom of the recess C as
shown more clearly in Figure 2.
By this construction of furnace plate it is found that the clinker forms on the
surface of the plate at C thus forming a protective covering for the plate against
the intense heat of the furnace and leaving the holes B clear for the free passage
of air through them.
If desired the holes B instead of being conical as shown in the drawings may be
parallel throughout their length.
Although in forming these plates the usual course would be no doubt to mould
or cast them complete I wish it to be understood that if desired the nozzles may
be made separate from the rest of the plate and secured in any convenient
manner.
I sometimes construct the plates with nozzles on both sides so that when one
side becomes damaged the plate may be turned over to present the other side to
the furnace.
The rims or nozzles D though preferably circular may be made of any desired
shape.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed 1 declare that what I
claim is
1. In a furnace grate provided with air holes the employment of rims or nozzles
such as D whereby the delivery ends of the air holes are raised above the level of
the surrounding plate substantially as described and illustrated in the accompanying
drawings.
2. A reversible furnace grate provided on each side with rims or nozzles
surrounding air holes substantially as herein described.

page_text: 3. A furnace grate substantially as described and illustrated in the accompanying
drawings.
R. S. RICHARDS.
Boult & Wade,
Agents for the Applicant.
R. S. RICHARDS.
Boult & Wade,
Agents for the Applicant.