Year: 1886

page_text: I GEORGE CRINER of 23 rue de la Chaussée d'Antin in the City of Paris in the
Republic of France, 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 :-
My invention for improvements in furnaces for the combustion of fuel has for
its object to admit an additional regulated quantity of air immediately after having
charged the furnace with fresh fuel, so as to effect a more perfect combustion of
the gases given off from the fresh fuel.
In the accompanying drawings fig. 1 is an elevation of apparatus constructed
according to my invention, and Fig. 2 is an end view, and Fig. 3 a plan of
the same.
My apparatus consists essentially of a box or vessel 0 0₁ having one plane
side a b, and mounted on pivots X X. supported in a forked frame F capable of
rotation about the axis YY on the supports S fixed to the furnace as clearly
shown. The box CC is divided centrally into two similar compartments C¹
and C communicating with one another by a small hole-The compartments C¹ C³
contain a certain quantity of sand, shot, mercury, or other suitable substance
which tends to run into the lower compartment and so to keep the plane side a b
vertical. When vertical this side is arranged to close the mouth of a tube t which
leads from the interior of the furnace to the atmospheric air. It will thus be seen
that my improved apparatus is constructed on the same principle as the sand glass.
The operation of the apparatus is as follows:-
After charging the furnace, the stoker reverses the position of the compartments
by turning the box C₁ C about the axis Y Y. The box is then left to itself and
takes the oblique position shewn in dotted lines, the face a b taking the position a¹ b¹
When how-
and allowing a free access of air to the tube t and so to the furnace.
ever through the running of the sand or other substance from the upper into the
lower compartment the lower compartment becomes heavier than the upper, the
apparatus again takes the position shewn in full lines, the face a 6 being vertical
and closing the end of the tube t and thus shutting off the additional supply of
air to the furnace. The time which the end of the tube t is uncovered may be
regulated by increasing or decreasing the quantity of sand or other substance in

page_text: the box CC. The quantity of air introduced per unit of time is regulated by
the section of the tube t, or by means of a baffle plate, or even by introducing a
solid body into the tube.
Figs. 4, 5 & 6 show my improved apparatus applied in duplicate to the furnace
of a steam boiler, the tube t opening into the furnace at its ends.
Figs. 7, 8, and 9 show the apparatus applied to furnaces within the boiler flues
the tube t admitting the air to the gases behind the firebridge by means of orifices
in a transverse tube t¹¹, or by a number of small tubes t.
Figs. 10 and 11 show the apparatus applied to the furnace within a boiler tube
the tube t being connected to a semicircular tube t' situated transversely in front
of the furnace and perforated with a number of small holes.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is,
1° Admitting an additional quantity of air to a furnace immediately after having
charged the said furnace with fresh fuel by means of an orifice or opening, opened
by hand at the moment of charging and closed automatically at a definite time
after the said charging by the box or vessel 01 C³ constructed on the principle of
the sand glass substantially as described.
2° The construction and arrangement of the box or vessel C₁ C² containing sand,
shot, or mercury in two compartments communicating by a small hole the said box
or vessel being mounted so as to be capable of motion about the axis X X, and also
about the axis Y Y, substantially as described.
3° The construction of the apparatus for admitting an additional supply of air
to furnaces immediately after charging with fresh fuel and shutting off the said
supply at a determined time, the said apparatus being constructed on the principle
of the sand glass in such manner, that, on turning by hand at the moment of
charging with fresh fuel the then fower compartment to the top, the orifice of the
tube t through which the said supply of air passes to the furnace will be opened,
and will afterwards be closed at a definite interval by the turning of the apparatus
on the axis XX caused by the running of the material in the upper compartment
of the vessel to the lower compartment substantially as described with reference to
the drawings.
5000