IMPROVED GRATE BARS FOR STEAM BOILER OR OTHER FURNACES
Year: 1885

page_text: "
I EDWIN WHITWORTH of Sir Thomas' Buildings Victoria Street Liverpool in the
county of Lancaster Provision Merchant, do hereby declare the nature of the said
invention for "IMPROVED GRATE BARS FOR STEAM BOILER OR OTHER FURNACES
(a communication from abroad by Fred V. Medynski of Des Moines Iowa) to be as
follows:-
This invention has for its object a bar that will burn slack efficaciously, will not
clinker up, and is not liable to be injured in rough usage while at the same time
very light in weight.
It consists in forming the bar very broad on the upper surface, with one thin
deep central web and two shallower side ones, the space between being perforated
with numerous orifices, narrow at the top but wider lower down so as to form a
grid. Distance pieces are fixed to the sides or ends as usual and if the ends are
used also as bearing points for the bars to rest on the supports. The following
dimensions are excellent for slack or small coal, 6 inches wide, inch thick, 3 to
6 feet long, perforations square and as close as practicable to each other
slack to for small coal at top, and one inch diameter at bottom.
inch for
WP. THOMPSON & Co.,
Agents for the Applicant.

page_text: I, EDWIN WHITWORTH of Sir Thomas' Buildings Victoria Street, Liverpool in
the county of Lancaster Provision Merchant, do hereby declare the nature of this
invention (a communication from abroad by Fred V. Medynski of Des Moines,
Iowa) and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement :-
This invention has for its object a bar that will burn slack efficaciously, will not
clinker up, and is not liable to be injured in rough usage while at the same time
very light in weight.
The invention essentially consists in forming the bar very broad on the upper
surface, with one thin deep central web, and two shallower side ones, the space
between being perforated with numerous orifices narrow at the top, but wider
lower down so as to form a grid.
Referring to the drawings
Figure 1 is a longitudinal section of the cellulated bar.
Figure 2 shows a complete bar in an inverted position.
Figure 3 is a transverse section.
A is the top of the bar forming the grate surface this is perforated as shown by
numerous holes a, a, a small at the top, but larger on the lower surface of the bar.
They are preferably conical as shown, but could be pyramidal or wedge shaped if
desired. B, B are distance pieces to support the bar on the bearers, and yet allow
a free circulation of cold air beneath it. C central tapering flange, serving as a
support or strengthening piece to the bar. D. D side flanges. If the bar be
sufficiently thick to do without these, they can be dispensed with, but they are
preferable as strengthening the edges of the bars, where used these are taper and
preferably much shallower than the central bar, but in some cases, I may make the
central bar shallow (or even done away with) and these deep.
The following dimensions are excellent for slack or small coal, 6 inches wide,
inch thick, 5 to 6 feet long, perforations square, pyramids, or cones, and as close
as practicable to each other, inch for slack to for small coal at top, and one
inch diameter at bottom. Parts B extend outward about and downward about
inch.
Among the advantages of this form of bar are the following:-the air can
circulate all round the bar, and up through the conical holes, cooling the bar, and
getting heated in, turn, as it enters the furnace. The minimum of metal is used,
exposed to the furnace, while the deep flange gives this bar as great a strength as
ordinary bars with vastly more metal. This form keeps the surface of the bars so
cool that clinker cannot stick to them.

page_text: Having now particularly described and ascertained the nature of the said
invention, and in what manner the same is to be performed, as communicated to
me by my foreign correspondent I declare that what I claim is
1st The furnace bars of substantially the form and construction herein described.
2nd In a furnace bar, the combination of the parts A a, B and C (0) D substan-
tially as and for the purposes described.