AN IMPROVED STEAM INJECTOR FOR SUPPLYING WATER TO STEAM BOILERS OR TANKS
Year: 1867

page_text: PROVISIONAL SPECIFICATION left by Alfred Vincent Newton at the
Office of the Commissioners of Patents, with his Petition, on the 26th
November 1867.-A communication from abroad by Neil Currie, James
Currie, and William Owen, all of the City of Toronto, Canada.
I, ALFRED VINCENT NEWTON, of the Office for Patents, 66, Chancery Lane,
in the County of Middlesex, Mechanical Draughtsman, do hereby declare
the nature of the said Invention for "AN IMPROVED STEAM INJECTOR FOR
SUPPLYING WATER TO STEAM BOILERS OR TANKS," to be as follows:-
The steam injector when applied as a boiler feed consists of a steam-tight
cylinder or box made of boiler iron or other metal, which is connected by a
pipe with a well, cistern, or other reservoir of water, the bottom of the
cylinder being placed at the height to which the water is required to rise in
the boiler. The cylinder is also connected with the boiler by two pipes, one
of which is used for the passage of steam from the boiler into the cylinder.
the other for the passage of water from the cylinder into the boiler. These pipes
are governed by taps or valves, so that the communication between the boiler
and the cylinder and cylinder and boiler may be shut off or opened as required.
The pipe connecting the cylinder with the well, cistern, or reservoir is also
governed in like manner by a tap or valve. The cylinder being empty, and
all communication with it being shut off, by opening communication between

page_text: the boiler and cylinder by means of the pipe used for the passage of steam
a jet of steam from the boiler fills the cylinder. When the cylinder is fall
of steam the communication between the boiler and the cylinder is shut off,
and the communication between the cylinder and the well, cistern, or reservoir
of water is opened. The steam rushes from the cylinder into the water, and
condensing in contact therewith creates a vacuum in the cylinder, when the
water immediately rises up and fills the cylinder. The communication
between the cylinder and well, cistern, or reservoir of water is then shut off,
and the communications between the boiler and the cylinder by means of the
pipe used for the passage of steam, and between the cylinder and boiler
by means of the pipe used for the passage of water are opened, and the steam
forces the water from the cylinder into the boiler entering the cylinder and
imparting heat to the water, keeping the water in the boiler on a level with
the bottom of the cylinder, and making it cover the entrance of steam pipe
into the boiler. This entrance being thus covered by the water, the action
of the steam on the water in the cylinder ceases, until the end of the steam
pipe leading to the boiler is again uncovered by the sinking of the water in
the boiler. When this takes place the steam will again act on the water in
the cylinder, foreing the water into the boiler and up to the same level, and
covering again the entrance of steam pipe into the boiler. It follows that so
long as there is any water in the cylinder the water in the boiler will stand
on a level with the bottom of the cylinder. A water gauge put on cylinder
will indicate the depth of water in cylinder.