Means of Air and Gas Jets.
Year: 1886

page_text: Date of Application, 6th Nov., 1886.
Complete Left, 4th Aug., 1887.
Complete Accepted, 13th Sept., 1887.
а тргоѵошено і пррага ог rromoting consuприопот отоке
by Means of Air and Gas Jets.
I, GEORGES DIETRICH of 36 Rue Guersant, Paris in the Republic of France,
Engineer, do hereby declare the nature of this invention to be as follows:-
My invention relates to apparatus of a kind that has been applied to boiler and other
fires for promoting consumption of smoke by forcing into the fire place currents of air
and steam by means of steam injectors. In order to render such currents more
effectual and to distribute their action more uniformly I employ two or more jets under
the fire grate and a corresponding number above the fuel on the grate placing those
jets symmetrically on each side of the fire and directing each jet obliquely forwards so
that the currents from each pair of jets, (that is to say from a jet on the right and a
jet on the left) meet in the middle line of the fire place. As the separate jets are most
conveniently supplied by pipes branching at right angles from main pipes, in order to
equalise the supply to each of those branch pipes, I make its end project a little into
the main pipe and slope it off on the side presented to the current. Thus the direct
current along the main pipe is somewhat checked and a greater amount of current is
caused to pass into the branch than would be the case if no such check existed.
Generally, it is unnecessary to maintain the jets in action except for some time after
fresh fuel has been fed to the fire. In order to intermit the jets I employ an auto-
matically closing steam valve arranged as follows. By the side of the valve box I
provide a vertical cylinder which is filled with oil and is fitted with a piston having
through it a small hole adjustable in area by means of a conical screw plug. There is
also a passage through the piston with a valve opening downwards.
The piston rod, which is loaded with a weight, is linked to a lever that bears on the
steam valve, and also to one arm of a lever that can be raised by a pull attached to its
opposite arm. When the stoker supplies fresh fuel, he pulls the latter arm down, thus
raising the piston in the oil cylinder and so relieving the steam valve from its load.
The valve thereupon is opened by the steam pressure, and the steam passes to the
it

page_text: injectors for the air and steam jets. The piston in the oil cylinder then gradually
descends at a rate determined by the area of the small hole which allows the oil to
pass through it. After a time the piston descends so far that the load is again brought
to bear on the steam valve gradually closing it and so causing the action of the jets to
cease. As the time during which the jets should act may have to be varied from time
to time to suit the nature of the fuel used, I make the piston rod tubular and extend
along it the stem of the adjusting plug, making its screwed end project through a nut
at the top of the piston rod, so that it can be readily turned in the one direction or the
other so as to increase or to diminish the area of passage for. oil through the piston,
and so to diminish or to increase the time during which the jets are kept in action after
fresh stoking:

page_text: COMPLETE SPECIFICATION.
An Improvement in Apparatus for Promoting Consumption of Smoke
by Means of Air and Steam Jets.
I, GEORGES DIÉTRICH of 36 Rue Guersant 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 relates to apparatus of a kind that has been applied to boiler and other
fires for promoting consumption of smoke by forcing into the fire place currents of air
and steam by means of steam injectors. In order to render such currents more
effectual and to distribute their action more uniformly I employ two or more jets under
the fire grate and a corresponding number above the fuel on the grate placing those
jets symmetrically on each side of the fire and directing each jet obliquely forwards so
that the currents from each pair of jets, (that is to say from a jet on the right and a
jet on the left) meet in the middle line of the fire place. As the separate jets are
most conveniently supplied by pipes branching at right angles from main pipes, in
order to equalise the supply to each of those branch pipes, I make its end project a
little into the main pipe and slope it off on the side presented to the current. Thus
the direct current along the main pipe is somewhat checked and a greater amount of
current is caused to pass into the branch than would be the case if no such check
existed. Generally it is unnecessary to maintain the jets in action except for some time
after fresh fuel has been fed to the fire. In order to intermit the jets 1 employ an
automatically closing steam valve arranged as herein after described.
Fig. 1 of the accompanying drawings shews a vertical section of two steam boilers
with internal furnaces supplied with steam through a single steam pipe with auto-
matically closing cock.
Fig. 2 shews a section on line X Y of one of the boilers and Fig. 3 shews a section
of the arrangement for insuring the division of the air and steam supply from a blower
into two parallel jets.
Fig. 4 shows a cross section of the automatically closing steam valve or cock. On
each side of the boilers A A are arranged two blowers B B. by preference constructed
according to Orvis's patent, each pair of which is supplied by two pipes C C branching
from a pipe D which has a stop cock E for cutting off the supply of steam to either
boiler. The pipes D are supplied with steam by the pipe F on which is fixed the
automatic valve or cock G.
The air current drawn by the steam into the furnace by each blower B is divided
into two parallel jets a a which cross those from the opposite blower at the axis of the
furnace, as shewn at Fig. 2.
This division of the current of combined air and steam is obtained by terminating
the pipe by a projecting edge c as shewn at Fig. 3,
b

page_text: The four blowers B of each boiler are so arranged as to deliver two of the combined
steam and air jets above and two below the fire grate H. For some boilers the
apparatus is only required to act intermittently, for a few minutes after each fresh
charge of. fuel, the duration depending upon the nature of the fuel employed.
For this purpose the automatic valve or cock G shewn in section at Fig. 4, is
employed; it consists of a valve apparatus m in which the steam from the boiler enters
under the valve tending to raise it. At the side of the valve is a vertical cylinder n
filled with oil and containing a piston o. The end of the piston rod carries a weightp
and the piston has at its centre a small hole q which can be regulated by a stem M.
A forked lever bears upon the valve and embraces the stem of the piston. The
lever is connected to a beam t by a rod N. The apparatus acts as follows:-
When fresh fuel has been charged into the furnace, the stoker draws the handle S
thereby lifting the piston o by the heam t and the chain or cord u, so that the oil
contained in the upper part of the cylinder passes below the same through spring flap
valves q' in the piston. These flap valves close when the piston arrives at the end of
its stroke. As the weight p does not now press the valve m on to its seat, this will be
lifted by the steam pressure and the steam will pass to the blowers, which are thus put
in action.
9
When the stoker releases the handle, the piston is forced down by the weight p,
descending at a greater or slower speed according as the opening is more or less
closed. When the weight p comes in contact with the lever 2", it presses upon this and
lowers it by degrees, thereby closing the valve, and shutting off the steain supply to
the blowers, which consequently cease to act.
The above operation is repeated at will.
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed I declare that what I claim is :-
(1.) Supplying furnaces with combined jets of air and steam, by arranging on each
side of the furnace two blowers the steam jets of which induce currents of air which
together with the steam issue in two parallel jets above or below the furnace and cross
the jets from the opposite blower placed at the same level, substantially as herein
described.
(2.) The arrangement for supplying the blowers with steam from a common pipe
with automatically closing valve or cock, whereby the stoker is enabled to cause the
blowers to work intermittently for any desired length of time after each charge of
fresh fuel, substantially as herein described.
Dad the 4th Jn of At 1007
ABEL & IMRA 1,
Agents for the Applicant.