IMPROVEMENTS IN APPARATUS FOR FEEDING BOILERS AND FOR RAISING AND FORCING FLUIDS GENERALLY
Year: 1869

page_text: LETTERS PATENT to John Clayton Mewburn, of 172, Fleet Street,
in the City of London, Patent Agent and Consulting Engineer,
for the Invention of "IMPROVEMENTS IN APPARATUS FOR FEEDING BOILERS
AND FOR RAISING AND FORCING FLUIDS GENERALLY."-A communication
from abroad by Alexander Friedmann, of 47, Praterstrasse, Vienna,
in the Empire of Austria.
Sealed the 26th April 1870, and dated the 30th October 1869.
PROVISIONAL SPECIFICATION left by the said John Clayton Mewburn
at the Office of the Commissioners of Patents, with his Petition, on
the 30th October 1869.
I, JOHN CLAYTON MEWBURN, of 172, Fleet Street, in the Oity of
London, Patent Agent and Consulting Engineer, do hereby declare the
nature of the said Invention for "IMPROVEMENTS IN APPARATUS FOR FEEDING
BOILERS AND FOR RAISING AND FORCING FLUIDS GENERALLY," to be as follows:-
The first part of this Invention relates to injectors with fixed nozzles,
which are not adapted to aspire or draw water at starting, and are
therefore always fitted below the level of the feed water so that the

page_text: overflow or waste water pipe or valve, which should always be readily
accessible and visible, is situated in as inconvenient and inaccessible a
position as the injector itself.
Now according to this Invention instead of giving the overflow pipe
a direction immediately downwards from the injector, as usual, a pipe
is fitted to bring the waste water or steam from the overflow to a place
casily visible and accessible, where it may be provided with a cock or
valve conveniently managed, so that the waste water becomes as visible
and accessible with these injectors as it is with Giffard's injectors or
those which draw or aspire water.
The water or steam discharged from the pipe may be collected in a
funnel and returned to the water tank, or otherwise,
The second part of this Invention is as follows:-The injector may be
compared to a gun the steam being the driving power, and the feed
water or liquid forced or raised being the body driven. The improve.
ment consists in forming the water nozzle at that part immediately
following the steam outlet with spiral grooves running out plain like
the grooves of a rifle; these grooves by retarding a little the velocity of
the forced water allow the steam more time to communicate its power
to the water and to become better mixed with it, whereby a quicker and
more perfect condensation is effected.
The same result may be attained by providing the water nozzle at its
larger conical parts immediately following the steam outlet with circular
grooves, rings, or other obstacles to give a whirling motion to the water
nt that part of the water nozzle where the condensation of the steam
commences. This arrangement may, if desired, be combined with the
employment of spiral grooves as before described,
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said John Clayton Mewburn in the Great Seal Patent
Office on the 30th April 1870.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
CLAYTON MEWBURN, of 172, Fleet Street, in the City of London, Patent
Agent and Consulting Engineer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Thirticth day of October, in the year of our

page_text: Lord One thousand eight hundred and sixty-nine, in the thirty-third
year of Her reign, did, for Herself, Ier heirs and successors, give and
grant unto me, the said John Clayton Mewburn, Ier special licence
that I, the said John Clayton Mewburn, my executors, administrators,
and assigns, or such others as I, the said John Clayton Mewburn,
my executors, administrators, and assigns, should at any time agree with,
and no others, from time to time and at all times thereafter during
the term therein expressed, should and lawfully might make, use,
exercise, and vend, within the United Kingdom of Great Britain and
O Ireland, the Channel Islands, and Isle of Man, an Invention for
"IMPROVEMENTS IN APPARATUS FOR FEEDING BOILERS AND FOR RAISING AND
FORCING FLUIDS GENERALLY," (communicated to me from abroad by
Alexander Friedmann, of 47, Praterstrasse, Vienna, in the Empire of
Austria,) upon the condition (amongst others) that I, the said John
5 Clayton Mewburn, my executors or administrators, by an instrument in
writing under my, or their, or one of their hands and seals, should
particularly describe and ascertain the nature of tho said Invention, and
in what manner the same was to be performed, and cause the same to
be filed in the Great Seal Patent Office within six calendar months next
) and immediately after the date of the said Letters Patent.
"
NOW KNOW YE, that I, the said John Clayton Mewburn, do hereby
declare the nature of the said Invention, and in what manner the
same is to be performed, to be particularly described and ascertained in
and by the following statement thereof, reference being had to the
5 accompanying Drawings, that is to say :-
This Invention has reference to injectors or apparatus for feeding
boilers, and for raising and forcing fluids for other purposes. Tho
injectors may be compared to a gun, the steam being the driving power,
and the feed water or liquid forced or raised being the body driven.
The Invention primarily consists in forming the water nozzle of
injectors at that part immediately preceding and following the steam
outlet with spiral grooves like the grooves of a rifle, but running out
plain.
This improvement will be understood on reference to Figure 1 of the
accompanying Drawings, which shows the application of spiral grooves
to an injector having an intermediate pipe (or pipes) such as is described
in the Specification of Bousfield's Patent (communicated by the said

page_text: Alexander Friedmann), dated 25th February 1868, No. 634. A is the
steam outlet; and R is the water nozzle or intermediate pipe, provided
with spiral grooves, as shown.
Figure 2 represents an ordinary form of injector, the water nozzle R
of which is provided with spiral grooves, as shown. A is the steam
outlet, the passage of the steam into and through the same being
controlled as required by means of a tapered rod B carried on the end
of a threaded spindle C, which is operated by a crank handle D.
The spiral grooves, which may be applied to other forms of injectors
than those shown, retard a little the velocity of the forced fluid, produce
a whirling motion of the same at that part where the steam meets it,
and thus allow the steam more time to communicate its power to the
fluid and to become better mixed with it, whereby a quicker and more
perfect condensation is effected.
The same result may be attained by providing the water nozzle at 1
that part immediately preceding and following the steam outlet with
circular grooves of any suitable form, or with rings or other suitable
obstacles to give a whirling or analogous motion to the water at that part
of the water nozzle where the condensation of the steam commences.
Figure 3 represents an injector the water nozzle R of which is
provided with circular grooves. These grooves or other obstacles, as
aforesaid, may be applied to injectors of other forms than those shown
in the Drawings, and they may, if desired, be combined with the spiral
grooves shown in Figures 1 and 2.
And having now described the nature of the said Invention, and in 2
what manner the same is to be performed, I declare that I claim,
constructing the nozzles of injectors or apparatus for raising and
forcing fluids with spiral grooves, circular grooves, rings, or other suitable
obstacles, substantially as and for the purpose herein-before described
and represented in the accompanying Drawings.
In witness whereof, I, the said John Clayton Mewburn, have
hereunto set my hand and seal, this Twenty-ninth day of April,
One thousand eight hundred and seventy.
3