An Improved Grate Bottom.
Year: 1894

page_text: PROVISIONAL SPECIFICATION.
An Improved Grate Bottom.
MAYDAY LEE of 32 Market Street Llanelly Master Mariner and DAVID DAVIES
of Cowell House Llanelly Mining Engineer in the Principality of Wales do
hereby declare the nature of this invention to be as follows:-
A frame varying in size and shape to suit present form of grates and stoves and
applicable thereto made of metal or of any other material of such thickness and height
to suit different conditions and requirements. The top of frame is flat with grooves
right through similar to grate bottoms now in use but having a large area formed
in a circular or part of a circle as may be deemed necessary capable of being
revolved various distances by the insertion of a bar, poker or other appliance fixed
or otherwise thereto, giving an action or motion by which the ashes and dust in
bottom of grate is cleaned thereby inducing an increased draught resulting in a
brighter fire. Having upright sides the depth of grate of metal or other material
having slots and holes to reduce body of fire as may be desired.
Dated this 11th day of October 1894.
MAYDAY LEE.
DAVD. DAVIES.
4
"
18
"
"
A
are grooved or slotted through in the usual manner, and are given a rotary or
circular motion by inserting a bar or lever in hole E on plan, Sheet 1 Figure 1 by
which means the ashes and dust are removed and an improved draught obtained.
They are adapted to existing grates of various forms and sizes, open or closed
fires, Hovis boiler, and all other furnaces.
"
They are supported when used as false bottoms to existing grates by either a
frame, Sheet 1 Figures 2. 3 and 4 Sheet 2 Figures 5. 7 & 8 marked B of the depth
required, or by four legs Sheet 3 Figures 12. 13. 14. 15. 16. marked I.
The legs are made about 24" x 1" xin two parts and "stepped to fit into
each other, and slotted or drilled for bolting to any required height.
Loose bars, Sheet 2 Figure 9 marked H, are provided, as shewn in plan, or any
other suitable shape, to fix at ends, and, or, back of frames, to fill area of larger
Price 8 i

page_text: grate bottoms, with holes corresponding to those in frames for bolting Sheet 1
Figures 3. 4, Sheet 2, Figure 7. marked G.
The grate bottoms Sheet 1. 2. 3. 4 Figure 1. 6. 11. 18 all marked A, all have a
fixed pivot Sheets 1 & 2 Figures 26 marked C or pivots Sheets 3. 4 Figures 11. 18
marked C underneath fitting the hole prepared in the frame Sheet 2 Figures 5. 8.
marked D.
When required for vertical bar grate the pivot is made long enough to work
between lower horizontal bars underneath, with a square head lever, fitting the
prepared square on pivot by which the bottom can be rotated or revolved.
When applied to horizontal bar grates the circular motion is obtained by inserting
a bar or lever into hole in grate bottom Sheet 1 Figure 1 marked E.
When the grate bottoms are required for very wide grates or furnaces they can
be made in two or more parts, Sheet 3 Figure 11 and Sheet 4 Figure 18 marked A-
and the side or additional parts are moved round or rotated either by a fixed lever
or levers on centre grate bottom, and two studs on each side part, the centre being
rotated by a lever placed in hole E, Figure 11, Sheet 3, or the side parts can be
rotated by spur racks on side next to centre part. The centre part having
corresponding spur racks on each side.
When required for boiler or other furnaces the grate bottoms could be in two or
more parts as in Figure 18, Sheet 4 and rotated by levers and studs as before
described or by spur racks on each part, and the whole rotated by inserting lever
in one part only.
Any other suitable form can, and is reserved to be made.
The whole may be made of metal or any other material.
H. Projections for fixing as permanent bottom.
J. Holes for legs.
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 I
claim is :-
In combination with any grate stove or furnace, a rotary grate bottom or bottoms
for eliminating or getting rid of the ashes and dust and thus improving the draught
and the necessary frames and legs for supporting the same.
Dated this 8th day of August 1895.
DAVD. DAVIES.