Improvements in Injectors for Steam Boilers.
Year: 1894

page_text: Date of Application, 16th Oct., 1894-Accepted, 15th Dec., 1894
COMPLETE SPECIFICATION.
Improvements in Injectors for Steam Boilers.
A communication by PARKER PILLSBURY HOGUE, of Cincinnati, in the County
of Hamilton and State of Ohio, United States of America, Gentleman, and
HENRY GAYLORD WILSHIRE, of Tooting, near London, England, but at
the time of this communication temporarily sojourning in Cincinnati aforesaid,
Gentleman.
1, WILLIAM PHILLIPS THOMPSON F.C.S., M.I.M.E., of The Agency for
Foreign Patent Solicitors, 6 Lord Street, Liverpool, and 6 Bank Street, Manchester,
both in the County of Lancaster, and 323 High Holborn in the County of Middlesex,.
Civil Engineer, do hereby declare the nature of this invention and in what manner
the same is to be performed, to be particularly described and ascertained in and
by the following statement:-
This invention relates to injectors for steam-boilers, and its object is to provide
a simple and economical device of this class which shall possess advantages over
and be superior to others now in use.
The invention consists in the novel construction and combination of parts
hereinafter fully described and specifically pointed out in the claims.
In the accompanying drawings,
Fig. 1 represents a perspective view of an injector constructed in accordance
with the invention. Fig. 2 is a central vertical section of the same.
Fig. 3 is a longitudinal section of the valve 22 hereinafter described.
In the said drawings, the reference numeral, 1, designates the casing of the
improved device, consisting of two tubes or cylinders, 2 and 3, connected together
with passages or communications therebetween, as will hereinafter appear. The
cylinder, 2, which contains the devices for ejecting or lifting the water from the
source of supply, is provided with a water-entrance, 4, and an overflow, 5, in the
latter of which is arranged a three-way cock, 6, having the ports or openings, a, b, c.
At the inner end of the water-entrance is secured a steam-jet pipe, 7, by means of
the screw-threads, 8, and between this jet-pipe and the overflow is a water-delivery
pipe, 9, similarly connected with the casing by means of screw threads, 10, and
terminating a short distance in front of the overflow. The tube or pipe, 7, has a
tapering bore, and its inlet is closed by means of a conical valve, 12, formed by
beveling or tapering the end of the valve-stem, 13, so as to fit therein. This valve-
stem works through a stuffing box, 14, and is provided with an operating handle, 15.
Upon its upper side, just in front of the inlet-opening, the tube, 7, is provided with
& smaller opening, 16. Both of these openings communicate with the steam-
passage, 17, the opening, 88, being closed when high steam is employed, the smaller
opening, 16, then serving as the inlet. When low steam is used, the opening or
inlet, 8, is opened, and both openings then serve as inlets. The casing, 3, is
provided with a steam-entrance, 20, connected with the steam-space of the boiler
by means of a tube provided with an ordinary stop-cock. (Not shown.) The
casing is provided with a steam-jet tube, 21, which is closed by means of the double-
tapered valve, 22, formed on the end of valve-stem, 23, working in a stuffing-box 24.
This tube, 21, terminates just in front of the tapered delivery-tube, 25, which in
turn communicates with the ejector-tube, 26, leading to the boiler, a passage, 27,
being between the feed and delivery tubes and communicating with the three-way
cock in the overflow. A passage, 28, is also between the jet and delivery tubes,
which leads to the water-delivery tube, 9, and also communicates with the three-way
cock. The valve-stem, 23, is connected by means of rod, 29, with a lever, 30,

page_text: secured to the stem of the three-way cock, so that said valve-stem and cock are
actuated simultaneously by operating said lever.
If the
The operation of the device will be readily understood. Steam being admitted
to casing, 3, through the steam-ports, will pass by passage, 31, to the steam-jet
tube, 7, which will cause water from the water-supply to be ejected into casing, 2,
and be forced out through the ports, a and c, of the three-way cock.
lever, 30, be now actuated the valve 22 in the steam-jet pipe 21, will be opened by
means of the rod 29 connected to the valve stem 23, the ports, a and b, of the
three-way cock will be closed and the water will be forced through delivery-tube, 25,
into feed-tube 26, and from thence be injected into the boiler.
From the foregoing, it will be seen that there is no pressure against the three-way
cock, and it also serves the twofold purpose of closing port, a, and shutting off
communication with the water-passage in the casing, and also closes port, b,
whereby air is prevented from being ejected into the boiler. It will also be noted
that by means of the differential openings in the jet-tube, 7, provision is made for
using either high or low pressure-steam, thus enabling a higher lift to be made
with lower steam than is possible in devices of this class in ordinary use.
The
double taper of the valve, 22, also causes the same to be automatically sealed by
steam-pressure should the valve be moved a trifle from its seat. By means of the
front taper also the steam is admitted slowly in starting, which is an important
advantage.
It will be seen from Fig. 3 that the steam getting into the groove 22" behind the
conically shaped head will tend to close the valve 22 & keep it steam tight.
There are other advantages possessed by the invention which will be apparent
to those skilled in the art, and which need not be enumerated here.
Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, as communicated to me
by my foreign correspondents, I declare that what I claim is-
1. The combination, with the duplex casings or cylinders having steam and
water entrances and overflow, of the three-way cock located in the overflow, the
steam-jet tube with differential openings located in the casing in proximity to the
water entrance, a water-delivery tube, and a valve and valve-rod for opening and
closing one of said differential openings, substantially as described.
2. The combination, with the duplex casings or cylinders having the steam and
water entrances and overflow, of a three-way cock located in the overflow, a
steam-jet tube and water-delivery tube located in proximity to the water-entrance,
a steam-jet tube and delivery and feed-pipes in the other casing, a double tapering
valve for opening and closing said last-mentioned steam-jet tube, and a connecting
rod and lever for actuating said valve and the three-way cock simultaneously,
substantially as described.
Deted this 15th dox of Databor & D 1001