Year: 1887

page_text: Date of Application, 26th Aug., 1887
Complete Left, 16th May. 1888
Complete Accepted, 22nd June, 1888
I, NIELS PETERSEN, of St. Johannes-Stiftelsen Ryesgade Copenhagen, Machinist,
do hereby declare the nature of this invention to be as follows:-
This invention relates to furnaces and its purpose is to bring the coals or fuel
heaped upon the furnace more quickly into combustion, thus conducing to the main-
tenance of the tension or heat of the furnace and to economy in fuel.
It is known that when heaping coals or fuel upon a furnace, the fire is cooled and
much smoke is inade, such cooling and smoke forining being continued until the fresh
fuel is brought into combustion.
The improvements consist in providing the upper part of the furnace door, or the
front or other wall of the furnace, with a suitable air inlet adapted to be closed, said
inlet being so arranged as to cause a current of air to pass over the fuel in the furnace
when the said inlet is open-The inlet preferably consists of a row of perforations in
the upper part of the furnace door, said perforations being adapted to be entirely or
partially closed by a plate or plates-To cause a more forcible current of air to pass
through said inlet when the latter is opened, I combine therewith an injector or
injectors If the inlet is formed of several perforations as described, the injector may
take the form of a steam conduit pipe having a number of nozzles, one for each
perforation-The said steam pipe may be used to force steam from said nozzles, or an
injector of known construction may be inserted therein to force a mixture of steam
and air from said nozzles-The pipe is capable of being removed temporarily from
before the inlet.
After heaping fresh fuel upon the furnace the said inlet is opened, and the current
of air directed upon or above the fresh fuel the smoke is more easily consumed thereby
and the fresh fuel brought more quickly into full combustion-At this stage the inlet
may be closed.
HERBERT & Co.,
Agents to Applicant,

page_text: Improvements in or relating to Furnaces.
I NIELS PETERSEN of St. Johannes-Stiftelsen, Ryesgade Copenhagen in the Kingdom
of Denmark Machinist 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 furnaces and its purpose is to bring the coals or fuel heaped
upon the surface more quickly into combustion thus conducing to the maintenance
of the heat of the furnace and to economy in fuel.
It is known that when heaping coals or fuel upon a furnace, the fire is cooled and
much smoke is made such cooling and formation of smoke being continued until the
fresh fuel is brought into combustion.
The improvements consist in providing the upper part of the furnace door or the
front or other wall of the furnace with a suitable air inlet adapted to be wholly or
partially closed said inlet being so arranged as to cause a current of air to pass over
the fuel in the furnace when the said inlet is open.
The inlet preferably consists of a row of perforations in the upper part of the
furnace door there being provided a plate or plates adapted to entirely or partially
close said perforations. To cause a more forcible current of air to pass through said
inlet when the latter is opened, I combine therewith an injector or injectors. If the
inlet is formed of several perforations as described the injector may take the form of
a steam pipe having a number of nozzles one for each perforation.
The said steam pipe may be used to force steam from said nozzles and thus draw
in air around the nozzles into the perforations aforesaid, or an injector of known
construction may be inserted in said steam pipe to force a mixture of steam and air
from said nozzles. The pipe is capable of being removed temporarily from before
the inlet.
After heaping fresh fuel upon the furnace the said inlet is opened and the current
of air directed upon or above the fresh fuel, the smoke is more easily consumed
thereby and the fresh fuel brought more quickly into full combustion. When this
stage is reached the inlet may be closed.
Referring to the accompanying drawings
Fig. 1 is a front elevation, and Fig. 2 a longitudinal section of a Cornish boiler
furnace provided with the improvements. a is the furnace door leading to the
furnace b. care the perforations in the upper part of the door a.
gare lugs to
which is pivoted the cover plate for said perforations so that the plate may be
folded up to rest over and cover the perforations or may be folded down to rest on
lengthened abutments on the lugs y to open the perforations. is the steam or air
supply pipe terminating in nozzles n and hinged to a pipe p supplied by an injector t
to which steam may be fed through the pipe s leading from the steam chest. A
chain passing over pulleys e may be attached to the pipe to enable it to be lifted
up from before the furnace door when not in use. on are the fire bars and k the ash
box door by the opening of which air passes to the furnace.

page_text: 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
1. In furnaces, a furnace door having perforations through the upper part thereof
in combination with a movable plate for closing said perforations for the purpose
set forth.
2. In furnaces, a furnace door, having perforations through the upper part thereof
and a movable plate for closing said perforations in combination with an injector or
injectors suitably connected for instituting and maintaining a draught through said
perforations for the purpose set forib.
Dated this 16th day of May 1888.
HERBERT & Co.,
18, Buckingham Street, London, W.C.,
Agents to Applicant.