IMPROVE- MEND T3T CAVERARDD
Year: 1874

page_text: ·LETTERS PATENT to William Bird Redish, of Liverpool, in the County
of Lancaster, Timber Merchant, for the Invention of "IMPROVE-
MEND
T3T
CAVERARDD
33
PROVISIONAL SPECIFICATION left by the said William Bird Redish
at the Office of the Commissioners of Patents, with his Petition,
on the 13th June 1874.
.
•
I, WILLIAM BIRD REDISH, of Liverpool, in the County of Lancaster,
Timber Merchant, do hereby declare the nature of the said Invention
for "IMPROVEMENTS IN AND CONNECTED WITH FIRE-GRATES," to be as follows:-
My Invention relates to novel combinations and arrangements of fire-
bars and combustion plates, and consists,-
First. As means for ensuring effective and economical combustion and
for freeing firc-places from dust and incombustible matter when
necessary I employ in combination with any fire-grate or place a movable
perforated and preferably inclined combustion inducer.

page_text: Second. As means for ensuring thorough combustion in furnaces
generally I employ in combination with such furnaces a movable
perforated combustion inducer or inducers either in front of or behind
the bridge, or both.
Third. As means for ensuring effective combustion in furnaces generally
I use in combination with bars placed step-like downwards from front
to back one or more movable perforated or unperforated combustion
plates.
Fourth. As means for freeing my improved grates from ashes and
adjusting the area of air inlet I use in combination one or more movable
perforated or unperforated combustion inducers and one or more movable
fire-bars.
Movable combustion inducers and fire-bars under my Invention are
suspended on centres. or hinges or arranged to slide up and down in
grooves, and are operated by levers, handles, or their mechanical equiva-
lents.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said William Bird Redish in the Great Seal Patent
Office on the 12th December 1874.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
BIRD REDISH, of Liverpool, in the County of Lancaster, Timber Mer-
chant, send greeting.
*
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Thirteenth day of June, in the year of
our Lord One thousand eight hundred and seventy-four, in the thirty-
seventh year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said William Bird Redish, Her special
licence that I, the said William Bird Redish, my executors, admini-
strators, and assigns, or such others as I, the said William Bird Redish,.
my executors, administrators, and assigns, should at any time agree
with, and no others, from time to time and at all times thereafter
during the term therein expressed, should and lawfully might make,
use, exercise, and vend, within the United Kingdom of Great Britain
and Ireland, the Channel Islands, and Isle of Man, an Invention for

page_text: "IMPROVEMENTS IN AND CONNECTED WITH FIRE-GRATES," upon the condition
(amongst others) that I, the said William Bird Redish, my execu-
tors or administrators, by an instrument in writing under my, or
their, or one of their hands and scals, should particularly describe
and ascertain the nature of the said Invention, and in what manner the
same was to be performed, and, cause the same to be filed in the Great
Seal Patent Office within six calendar months next and immediately
after the date of the said Letters Patent.
NOW KNOW YE, that I, the said William Bird Redish, 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, reference being had to the accompanying
Sheet of illustrative Drawings, and to the figures and letters marked
thereon, that is to say:
―
My Invention relates to novel combinations and arrangements of fire-.
bars and combustion plates, and consists, —
First. As means for ensuring effective and economical combustion
and for freeing fire-grates from dust and incombustible matter when
necessary I employ in combination with any fire-grate or place a movable
perforated and preferably inclined combustion inducer.
:
Second. As means for ensuring thorough combustion in furnaces
generally I employ in combination with such furnaces a movable
perforated combustion inducer or inducers cither in front of or behind
the bridge, or both...
Third. As means for ensuring effective combustion in furnaces
generally I use in combination with bars placed step-like downwards
from front to back one or more movable perforated or unperforated
combustion plates. -
Fourth. As means for freeing my improved grate from ashes and
adjusting the area of air inlet I use in combination one or more movable
perforated or unperforated combustion inducers and one or more
movable fire-bars.
Movable combustion inducers and fire-bars under my Invention are.
suspended on centres or hinges or arc arranged to slide up and down
in grooves, and are operated by levers, handles, or their mechanical
equivalent.

page_text: DESCRIPTION OF THE DRAWINGS.
Fig. 1 is a view in longitudinal section illustrative of the first, second,
and third parts of my Invention. a, movable inclined perforated com-
bustion plate or inducer reaching from the lowest part of the fire-grate
to near the top of the bridge. The said plate or inducer a is here sus-
pended on a hinge 6; centres or their equivalents may be used. It will
be obvious that the height and inclination of the combustion plate or
inducer may be .varied. c is a handle for opening, adjusting, and
operating a; d are transverse fire-bars arranged in series descending
from back to front; e, steam boiler heated by the furnace f; g, bridge
of furnace provided with an air opening and fitted with a perforated
combustion inducer h; i, handle for operating ½ so as to free it from.
any dust or ashes tending to choke the perforations.
Fig. 2 is a longitudinal section and Fig. 3 a front clevation of a fire-
grate for heating an evaporating pan, and illustrative of the third parts
of my Invention; j, j', j³, are series of transverse fuel-carrying bars
descending step-like from front to back of the furnace; k,. dead plate;
1, movable perforated combustion plate or inducer provided with
operating handle m; n, bridge; o, blocks for protecting the bottom of
the evaporating pan from the flames. The number of bars, whether
placed transversely or longitudinally, as well as the number of steps,
may be varied.
The combustion plate or inducer (more than one may
be used) may be made movable in any direction.
Fig. 4 is a transverse section of a fire-grate under my Invention shown
applied to a reverberatory furnace. Here p, p', p², and p³ arc series of 2
transverse bars; i, dead plate; q, movable combustion plate or inducer
without perforations and hinged at r; s, operating handle; t, bridge.
The advantages of greatest moment in arranging the bars step-like from
back to front are securing free admission of large quantities of air
amongst, the fuel.
3
Fig. 5 is a transverse section illustrating the first and fourth parts of
my Invention; 1, dead plate; 2, movable bars hinged at 3, and adjusted
as to angle by the rack 4; 5, bottom of grate; 6, movable combustion
plate or inducer operated by the handle 7; 8, bridge of furnace.
Fig. 6 is a transverse section showing my improvements adopted to a a
domestic fire-grate; 9, inclined movable unperforated combustion inducer
or plate hinged at 10, and operated by the stud 11; 12, bars.
34

page_text: Having now described the nature of my said Invention and particu-
larized the same in such manner that others will be enabled to carry my
improvements into practice, I claim the combination and arrangement
of parts substantially as described and illustrated under the four heads
of the above Specification.
In witness whereof, I, the said William Bird Redish, have here-
unto set my hand and seal, the Eleventh day of December, in the
year of our Lord One thousand eight hundred and seventy-
four.
In the presence of
JAMES JOHNSON,
Patent Office,.
Clayton Square,
Liverpool.
W. B. REDISH. (L.S.)