IMPROVEMENTS IN AND RELATING TO INJECTORS OR WATER FORCING APPARATUS FOR FEEDING STEAM BOILERS AND FOR PUMPING PURPOSES
Year: 1880

page_text: PROVISIONAL SPECIFICATION left by George William Garrett at the Office
of the Commissioners of Patents on the 10th March 1880.
GEORGE WILLIAM GARRETT, of Manchester, in the County of Lancaster, and of
15, Water Street, Liverpool, also in the County of Lancaster.
"IMPROVEMENTS IN
AND RELATING TO INJECTORS OR WATER FORCING APPARATUS FOR FEEDING
STEAM BOILERS AND FOR PUMPING PURPOSES."
My Invention has for its object the construction of an injecting or water forcing
apparatus to be used for feeding steam boilers and for other purposes, and may be
termed a gravity injector (as distinguished from a jet injector), the action of which
is more reliable than the action of ordinary jet injectors, and less liable to be choked
or rendered inoperative by muddy water and passage of foreign matter.
An apparatus constructed according to my Invention, consists of a vessel or
container, preferably cylindrical, of any suitable size, provided with an opening at
the bottom, to which is connected a hollow plug cock with one bottom and one side
way in the plug, and one bottom and two side ways in the casing. The bottom way
or branch of the cock opens into the bottom of the vessel. The two side ways of
the casing of the cock are connected to pipes, one of which is the suction or supply
pipe, and the other is the feed or pipe leading to the boiler. The casing of the cock
is provided with a branch which is attached to a steam pipe leading from the boiler
and also a branch to which is attached a pipe leading from the cock to the top of
the vessel or container. In the plug of the cock there is a flat side or port, which
opens communication between the steam pipe from the boiler and the pipe leading
from the top of the vessel or container when the side branch of the plug is open to
the feed pipe to the boiler. The plug of the cock is provided with a suitable handle
for hand working, or attachment to any moving part of an engine, by which
reciprocating rotary motion can be imparted to the plug and cock. The vessel or
container is provided with a pet cock on the top, and a glass water gauge to indicate
the working.
In operation the apparatus is placed in a position above the water level of the
boiler, and one branch of the cock connected to the supply or suction pipe, and the
other branch connected to the feed pipe to the boiler. The other branch before
referred to is also connected to a steam pipe from the boiler. The apparatus is first
filled with steam by opening communication with the boiler, and the air is expelled

page_text: from the vessel or container through the pet cock, and upon turning the plug of
the cock so as to open the vessel to the suction or supply the vessel fills with water,
and upon reversing the action so as to open communication between the vessel and
the boiler, and at the same time open communication between the top of the vessel
and boiler by means of the port in the cock, the steam pressure on the top and
bottom of the liquid in the vessel is equalized, but owing to the vessel being at a
higher level than the water in the boiler the water in the vessel gravitates into
the boiler. The action is repeated by alternately opening communication between
the suction pipe and the vessel and the feed pipe and the vessel by imparting
reciprocating rotary motion to the plug of the cock.
Although I have described the apparatus applied as an injector for feeding steam
boilers, it will be understood that the apparatus may be used for forcing water for
other purposes.
It will be seen that by my Invention I obtain a valveless water forcing
apparatus, with large ways and passages not likely to be obstructed by foreign
matter.