IMPROVE- MENTS IN APPARATUS FOR INJECTING OR OTHERWISE PROPELLING LIQUIDS
Year: 1870

page_text: LETTERS PATENT to Robert Sinclair, of Glasgow, in the County of
Lanark, North Britain, Engineer, for the Invention of "IMPROVE-
MENTS IN APPARATUS FOR INJECTING OR OTHERWISE PROPELLING LIQUIDS."
Sealed the 10th March 1871, and dated the 29th November 1870.
PROVISIONAL SPECIFICATION left by the said Robert Sinclair at the
Office of the Commissioners of Patents, with his Petition, on the
29th November 1870.
. I, ROBERT SINOLAIR, of Glasgow, in the County of Lanark, North
Britain, Engineer, do hereby declare the nature of the said Invention for
“IMPROVEMENTS IN APPARATUS FOR INJECTING OR OTHERWISE PROPELLING LIQUIDS,”
to be as follows:-
This Invention has for its objects to simplify the construction, to
reduce the cost, and to increase the efficiency of apparatus for injecting
or otherwise propalling liquids.
The improved parts comprise two chamber pieces formed with branch
tubes by means of which they are fixed to a frame bar, and by one of

page_text: с
which the water or liquid to be injected or propelled enters the apparatus
whilst waste water passes off by the other. The steam which is the
propelling agent employed enters what may be termed the inlet chamber
by a pipe fixed so as to project into it about halfway across, and which
has its inner end made of an external conical form. In the continuation
of the line of the steam pipo there is an intermediate tube capable of
sliding through a stuffing box in the side of the inlet chamber, and this
tube is continued through a second stuffing box into the other or waste
chamber. One end of the intermediate tube is made of an internal
conical form to fit the end of the steam pipe when closed up to it, whilst
its other end is made of an external conical form, and so as to fit the
conical entrance of a pipe fixed opposite to it in the waste chamber, and.
which leads the propelled liquid away from the apparatus, being fitted
with a check valve when required, as in feeding steam boilers, for
example. The intermediate tube is made with a bore which, by
preference, tapers so as to be smallest at the waste chamber end, and a
lever or equivalent appliance is connected to it externally whereby to
move and adjust it. As the tube is moved towards the steam pipe it
tends to close the communication with the water inlet chamber, and to
open that with the waste chamber, and vice versâ; and it is easy by
manipulating it backwards and forwards to find the position for obtaining
the best action of the apparatus in the circumstances in which it may he
used.
An important advantage of the improved apparatus consists in its
being able to feed into a steam boiler water of higher temperature than
can be done by ordinary injectors.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Robert Sinclair in the Great Seal Patent Office on
the 27th May 1871.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, ROBERT
SINCLAIR, of Glasgow, in the County of Lanark, North Britain, Engineer,
send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-ninth day of November, in the
year of our Lord One thousand eight hundred and seventy, in the thirty-
fourth year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said Robert Sinclair, Her special licence
that I, the said Robert Sinclair, my executors, administrators, and
assigns, or such others as I, the said Robert Sinclair, my executors,
administrators, and assigns, should at any time agree with, and no
3 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 Ireland, the
Channel Islands, and Isle of Man, an Invention for "IMPROVEMENTS IN
APPARATUS FOR INJECTING OR OTHERWISE PROPELLING LIQUIDS,” upon the con-
› dition (amongst others) that I, the said Robert Sinclair, 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 the said Invention, and in what manner the same was to
be performed, and cause the same to be filed in the Great Seal Patent
5 Office within six calendar months next and immediately after the date of
the said Letters Patent.
KNOW NOW YE, that I, the said Robert Sinclair, do hereby declare
the nature of my said Invention, and in what manner the same is to be
performed, to be particularly described and ascertained in and by the
following statement in writing, reference being had to the accompanying
Drawings, that is to say :-
My said Invention has for its objects to simplify the construction, to
reduce the cost, and to increase the efficiency of apparatus for injecting
or otherwise propelling liquids.
And in order that my said Invention and the manner of performing
the same may be properly understood, I hereunto append a Sheet of

page_text: explanatory Drawings to be herein-after referred to, and representing
two modifications of my improved apparatus as arranged for injecting or
feeding water into steam boilers. The Figures are longitudinal sections,
and the same reference numerals are used to mark the same or like parts
in both.
The modification shown in Figure 1 comprises two chamber pieces 1, 2,
formed with branch tubes 3, 4, by means of which they are fixed to a
frame bar or connecting piece 5, and by one 3 of which the water or
liquid to be injected or propelled enters the apparatus, whilst wasto
<water passes off by the other 4. The steam, which is the propelling
agent employed, enters what may be termed the inlet chamber 1 by a
pipe 6 fixed to it, so as to project into it about halfway across, and
which has its inner end made of an external conical form. In the
continuation of the line of the steam pipe 6 there is an intermediato
tube 7 capable of sliding through stuffing boxes 8, 9, in the inner sides
of the chamber pieces 1, 2. The inlet end of the intermediate tube 7 is
made of an internal conical form to fit the end of the steam pipe 6 when
closed up to it, whilst its other end is made of an external conical form
and so as to fit the conical entrance of a pipe 10 fixed opposite to it in
-the waste-chamber 2, and which leads the propelled liquid away from
the apparatus, the communication between it and the boiler being fitted.]
with a check valve to prevent return when the apparatus is used for
feeding or injecting water. The bore of the steam inlet tube 6, the
intermediate tube 7, and the continuation tube 10 requires to be
carefully formed in order to secure efficient action; and in making these
parts after a bore of uniform diameter has been drilled or otherwise
formed in them they are fixed together, and the bore through all of
them is brought to the proper form by means of a "widener" or
enlarging tool, having a uniform taper of a quarter of an inch to the
foot of length. The widener is afterwards entered in the opposite,
direction into the continuation tube 10 to slightly enlarge the outer part
of that tube, and leaving the most contracted part of the entire bore in
the continuation tube 10 and at a short distance from its inner end. A
lever 11 jointed to the connecting bar 5 is applied to the intermediate
tube 7 to adjust it by; and it is easy by manipulating it backwards and
forwards to find the position for obtaining the best action of the appa-
ratus in the circumstances in which it may be used. When the
apparatus is first started into action by opening the stop valve or cock

page_text: on the pipe leading the steam to the inlet tube 6, there is an overflow
or waste of water by the pipe 4, but after the apparatus begins to act
properly there is. suction in the pipe 4; and in order that air may not
be drawn in thereby a light valve 12' is fitted in the pipe 4, which
allows the waste water to pass off freely, but instantly closes on air
attempting to enter. The water inlet 3 is by preference supplied from
a source as high as the apparatus; but in some cases the apparatus will.
draw up the water from a somewhat lower level..
The modification shown in Figure 2 does not differ in any essential
O part from that shown in Figure 1 and herein-before described, but it is
somewhat simpler, being designed for use in cases wherein the circum-
stances are not subject to frequent or great variation, that is to say, for
example; when the pressure of the steam and the temperature of the
feed water as supplied to the apparatus continue tolerably uniform.
> The chamber pieces 1, 2, become each a simple internally screwed three-
opening coupling, and the intermediate piece 7 is screwed permanently
to the pieces 1, 2, continual adjustment not being required. The
inlet tube 6 and continuation tube 10 are similarly screwed into their
places, and are secured by jam nuts 13, 14. The continuation tubo 10
▸ scarcely ever requires adjustment, and the inlet tube 6 very seldom, but
either can be adjusted very casily if required on temporarily slackening
the jam nut 13 or, 14, and the coupling (15, for example,) connecting
the end, to be adjusted to the steam pipe or feed pipe as the case
may be.
5 My improved apparatus may be used not only for feeding steam
boilers but also for propelling or forcing liquids in all circumstances
wherein a pump would otherwise be used, and wherein the heating of
the water by the steam employed as the propelling agent is either an
advantage or not objectionable.
Having thus particularly described my said Invention, and the manner
in which the same is to be performed, I have to state that I do not
restrict myself to the precise details herein described or delincated, but
that what I believe to be novel and original and claim as the Invention
secured to me by the herein-before in part recited Letters Patent is,-
1. The constructing and combining together of the tubes 6, 7, and
10, with a bore of a uniform taper continued from the first through the
second to the third, substantially as herein described and delineated.

page_text: 2. The making of the intermediate tube 7 adjustable as herein-before
described with reference to Figure 1 of the accompanying Drawings.
In witness whereof, I, the said Robert Sinclair, have hereunto set
my hand and scal, this Twenty-sixth day of May, in the year of
our Lord One thousand eight hundred and seventy-one.