Improved Apparatus for Controlling the Air Supply to Furnaces.
Year: 1892

page_text: Date of Application, 13th May, 1892
:
Complete Specification Left. 11th Feb.. 1893-Accepted. 25th Mar.. 1893
PROVISIONAL SPECIFICATION.
Improved Apparatus for Controlling the Air Supply to Furnaces.
I, HERMANN SCHOMBURG, 97 Alt Moabit, Berlin, in the German Empire,
Engineer, do hereby declare the nature of this invention to be as follows:-
This invention relates to improvements in apparatus for controlling the air
supply through a furnace grate into the layer of burning fuel thereon. This has
heretofore generally been accomplished by means of dampers in various shapes and
places.
i
The improvement consists in employing water for controlling the volume of
air passing up through the grates. This end is attained by raising or lowering at
will or automatically the level of the water in a vessel or box underneath the
furnace bars, which latter reach into this water, or by raising or lowering the fire-
bars hinged at their upper end.
The lowering or raising of the water level in the box or of the firebars and in
consequence the increasing and the decreasing of the volume of air which can pass
through the gratebars, may be accomplished in various mechanical ways.
Dated this 13th day of May 1892.
ALLISON BROS.,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improved Apparatus for Controlling the Air Supply to Furnaces.
I, HERMANN SCHOMBURG, of 97 Alt Moabit, Berlin, in the German Empire,
Engineer, 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 :-
This invention relates to improvements in apparatus for controlling the air supply
through a furnace grate into the layer of burning fuel thereon.
This has heretofore generally been accomplished by means of dampers in various
shapes and places.
In the accompanying drawings, which serve to illustrate the way in which I
prefer to carry out this invention, Fig. 1, is a vertical section, and Fig, 2, a
horizontal section.
K is part of the water space of a boiler, G an arch of fire brick, F, F, com-
bustion places, C the fire bridge, R the main grate bars, H, movable grate bars,
P, a place where the ashes accumulate, D the main basin or box underneath the
grate bars to hold the water, B a side basin, A. a floating ball gauge cock, Ma
drain or emptying cock, S a sieve or grating between the main and side basin.
The operation of the apparatus is as follows:-After the fire is started on
grates R and H, water is admitted into basin B, communicating through sieve S
with the large basin D underneath the grate bars and combustion places, until the
water level has reached a certain height, which may be found by experience to be
most suitable for the proper working of the furnace under given circumstances.
It will be readily understood, that by raising the water level the grate surface
and with it the air supply is decreased and vice versa when the water level is lowered.
After the proper water level has been determined upon, the floating ball gauge
cock A is so arranged that it will keep the level constant, and will constantly
replace the water evaporated. The maintaining of the water level may however
be effected by any other suitable means.

page_text: Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
1. The improved apparatus for controlling the air supply to furnaces con-
structed, arranged and operating substantially as described and shown in the
accompanying drawings.
2. The employment of water in a furnace for the purpose of increasing or
decreasing at will or automatically the air supply to the grate of a boiler or the
like, substantially as herein described.
Dated this 11th day of February 1002
ALLISON BROS.,
Agents for the Applicant.