Improved Apparatus for Promoting the Circulation of Water in Steam Boilers.
Year: 1886

page_text: Date of Application, 25th Sept., 1886.
Complete Left, 8th Jan., 1887.
Complete Accepted, 8th Feb., 1887.
RESERVE
PROVISIONAL SPECIFICATION.
Improved Apparatus for Promoting the Circulation of Water in
Steam Boilers.
We LAURITZ GJEMRE, King Street, Newcastle-on-Tyne, in the County of
Northumberland, Merchant, and EILERT OFTEDAHL, Stavanger, Norway, Engineer,
do hereby declare the nature of this invention to be as follows:-
Our invention is for the purpose of agitating the water in Boilers of every
description used for generating Steam, during and after firing by means of a
propeller or fans revolving on a Shaft or Spindle, pivotted inside a Boiler, and made
to revolve by the turning of a handle or other means. The said handle or any other
means we employ for revolving the said fans are fixed on a prolongation of the said
Shaft, put outside the Boiler. The said fans or propeller in revolving cause the water
in the Boiler to be well mixed throwing the water first effected by firing into the body
of the water less effected, in order to promote an equalising effect on the water by the
firing, and consequently accelerating the generation of Steam. We may give the fans
or propeller any shape or position best suited to the different constructed Boilers, in
order to carry out our invention, that is-to promote and accelerate the generation of
Steam, by agitating the water in Boilers as before described and by a quick distri-
bution and intermixing of the water in the Boiler as it gets effected by the firing.
We claim as new, agitating the water by means herein before described, shortening
thereby the time required for generating Steam and consequently the saving of Fuel.

page_text: COMPLETE SPECIFICATION.
Improved Apparatus for Promoting the Circulation of Water in
Steam-boilers.
We LAURITZ GJEMRE Merchant of King Street City of Newcastle on Tyne County
of Northumberland and EILERT OFTEDAHL of Stavanger Norway do hereby declare
the nature of our invention for IMPROVED APPARATUS FOR PROMOTING THE CIRCULATION
OF WATER IN STEAM BOILERS and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement :-
Our Invention is for the purpose of promoting the circulation of water in Steam-
boilers by agitating the water in boilers during and after firing.
This we do by means of a propeller or propellers secured to a shaft inside the boiler
and made to revolve by hand or automatically by the engine after sufficient steam
has been raised, or any other power-further on described.
Steam-boilers as hitherto fired require very careful and gradual firing in order to
prevent premature wearing-away and injury to the boiler.
By our Invention the firing can be proceeded with in a more rapid and quicker
manner, thereby saving time and fuel in the raising of Steam, and does not require
the careful and gradual firing, which Steam-boilers not provided with our revolving
propellers do require.
By actuating as further on described and revolving the said propeller, the water
in the boiler gets thoroughly intermixed, changing the contact of heating as part after
part of the water gets effected by firing; so that, the effect of firing more equalised
throughout the entire body of the water in the boiler, and permits of a quicker firing
up, Steam is raised in less time and with less sacrifice of fuel.
The before named shaft to which the said propeller is secured has its lower end
pivoted and run in a bracket or stud attached to the stay-plate or any other part
inside the boiler on the boiler-plate, the other or upper end of the said shaft passes
right through the boiler, and runs in a steamtight bush and stuffing-box secured, to
the boilerplate. A prolongation of the said shaft outside the boiler is provided with a
fixed or removable handle, which turned by hand, actuates and revolves the said
propeller, agitating and promoting the circulation of 'the water as before described.
Sometimes in place of the just named handle, we put spur and bevelled spur wheels
with other suitable gearing and use instead, hand turning, a donkey engine, or the
engine itself after steam has been raised, or any other power automatically or other-
wise, that is available for actuating the said propeller. Sometimes we vary the shape
and number of fans or blades of the said propeller, as well as, the shape and arrange-
ment of fixing the shaft, most suitable for differently constructed steamboilers for the
purpose of carrying out our Invention that is, agitating the water in steamboilers, so
as to increase the circulation of the water and the raising of steam in a quick and
rapid manner, thereby saving time and fuel. The accompanying drawings will make
our Invention more easily understood.

page_text: Fig. I. shows a longitudinal section of the shaft and propeller wherewith we agitate
and promote the circulation of the water-before described-B the shaft to which the
propeller A is secured. C the bracket into which the pivoted lower end of the
shaft B runs. D the stay-plate to which the bracket C is fastened. E the bush and
stuffing-box through which the prolonged shaft B passes and runs. F the handle
which turned by hand, actuates the propeller and intermixes the water in the boiler―
as before described-G part of a boiler and boilerplate. H combustion chamber
and J the furnace.
Fig. II. is a vertical cross section. A the propeller and shaft B as arranged in
boiler G with two furnaces J. J.
Fig. III. shows a modification in the arrrangement of shaft and propeller-A the
propeller B the shaft. C the bracket G part of boiler and boiler-plate. Fig. IV.
shows part of a boiler with a single furnace in which the propeller A and the shaft B
is arranged so that the same can be actuated from near the top or upper part of the
boiler either by hand or otherwise-K. K. are bevelled spur wheels permitting of
various attachments for actuating the propeller A-C the bracket in which the lower
end of the shaft runs-E the stuffing-box-G the boiler and J the furnace.
Having now described and ascertained the nature of our Invention and in what
manner the same is to be performed and applied we wish it to be understood that
what we claim as the Invention to be protected by the hereinbefore in part recited
Letters Patent is :-
First. The propeller and arrangement of the propeller revolving inside the Steam-
boiler, actuated by hand or otherwise for promoting the circulation of water in Steam-
boilers substantially as and for the purpose hereinbefore described.
Secondly. A quick raising of steam and a more rapid firing up substantially
hereinbefore described.
Thirdly. A saving of time and fuel in the raising of steam in boilers substantially
hereinbefore described.
In witness whereof we the said L Gjemre & E Oftedahl have hereunto set our hand
and seal this the seventh day of January in the year of our Lord One thousand eight
hundred and eighty seven.