Improvements in and relating to Steam Injectors for use with Locomotives and Steam Boilers.
Year: 1890

page_text: Date of Application, 14th Feb., 1890-Accepted, 15th Mar., 1890
עגענע VUMI
DI MUIFICATION.
Improvements in and relating to Steam Injectors for use with
Locomotives and Steam Boilers.
I, JOHN DESMOND, a citizen of the United States and resident of Brooklyn, in the
County of Kings, State of New York, United States of America, Inventor, do hereby
declare the nature of my invention for STEAM INJECTORS and in what manner
the same is to be performed, to be particularly described and ascertained in and by
the following statement:—
This invention pertains to certain new and useful improvements in steam injectors,
baving for its object, first the production of an automatic injector comprising an
overflow chamber between the suction and combining tubes and a sliding valve, for
presenting a continuous opening or communication between the mouth of the
combining tube and the overflow chamber during the working of the injector; and
secondly, the provision of means for regulating and controlling the supply of water
to the injector whereby the water-supply is not affected by any jarring to which the
injector might be subjected.
In automatic injectors as heretofore constructed when the opening into the secondary
overflow is once closed it so remains throughout the entire working of the injector.
Better results could be obtained if the communication between the combining
tube and the overflow chamber was uninterrupted and made continuous during the
working of the injector.
This desirable result I have attained, and to that end the invention comprises the
details of construction, combination and arrangement of parts, substantially as herein-
after fully set forth.
In the accompanying drawings:-
Figure 1 is a vertical longitudinal sectional view of my injector; Figure 2 is a
cross sectional view thereof on the line x-x; Figure 3 is an enlarged detail
perspective view showing the sliding valve.
Referring to the drawings, A designates the casting or tubular casing provided with
the steam inlet arm a, the water inlet arm a¹, the overflow arm or branch a², and the
delivery arm or extension nozzle a³, to each of which is connected the respective pipe
connection, not shown.
The steam inlet arm a is extended into a chamber B, over one end of the casing,
and into a circular extension 6 of the outer wall thereof is screwed a plug b¹, through
the centre of which is passed the stem 62 of the steam inlet valve C. To the outer
end of this stem is loosely connected the vertical arm of a lever D, the inner end
of the right angular portion of which is fulcrumed to an ear d, of a ring or collar d¹,
disposed around the circular extension b. This ring or collar is firmly clamped or
held in place by the circular flange d², of the plug b. By loosening said plug, said
ring or collar can be turned and rigidly held at the desired point so as to keep
the lever handle perpendicular in case the injector is inclined towards one side.
Into a circular extension e, of the water inlet arm a¹ is screwed a plug E, through
which and a second smaller plug is passed the spindle e¹ of a water inlet valve F
located in the arm a¹.
The valve F consists of two circular heads or disks f, f, centrally threaded and fitted
respectively on the right and left hand screw threads f¹, f2, of the spindle e¹. These
heads or disks f,f, are also fitted on or guided by a rod f projecting from the plug E,
and extended through upper coincident apertures of said heads or disks. These heads
or disks fit flush against the walls of the arm a¹, and their outer ends extend into the
opposite protruding circular portions of the sides of said arm.
By turning the spindle e¹, it is obvious that the heads or disks comprising the valve

page_text: will move away from or toward each other, according as they are being opened or
closed. The water is thus permitted to flow to or is cut off from the injector, and no
matter how great the jarring (especially when the injector is used on locomotives)
these heads or disks will retain their same position.
To the spindle e' is secured a finger or pointer 4, which travels over a scale f³ on
the flange of the plug E. This finger or pointer indicates the amount of water
being forced into the boiler, i.e. the quantity for the passage of which the valve is
adjusted.
The steam inlet tube G projects to within a short distance of the lifting tube H,
which latter tube is provided with an inner widened end and is screwed into a wall g,
of the casing.
To the widened end of the combining tube H¹ is secured one end of the delivery
tube I, the latter being held in place by the arm or extension nozzle a³.
In the circular flange h of the combining tube at the point of conjunction with the
delivery tube is formed a series of holes or openings, through which the spill or
overflow passes in to the overflow chamber 2, wherein is formed an apertured wall h³,
as shown.
J is a sliding valve designed to slide on the combining tube H¹. This valve has in
one face a conical recess or opening j, and a series of small grooves or recesses j¹
extending over the conical recess. This valve is designed to fit flush against the
lifting tube during the working of the injector, and against the circular flange h
covering the overflow holes ¹, in the starting thereof, and until a vacuum is formed
drawing it back to its normal position after which a passage way between the mouth of
the combining tube and the overflow chamber is had through the grooves or recesses ¹,
whereby the overflow from the holes h¹ of the combining tube is drawn in through the
said grooves or recesses, thereby establishing a continuous connection between the
mouth of the combining tube and the overflow chamber and prevent such overflow
from passing out through the overflow valve.
An overflow valve K rests upon the opening between the overflow chamber h², and
the arm or branch, and above it is located a lazy cock k.
The operation is as follows:-
The steam upon being admitted to the injector will pass through the steam inlet
and lifting tubes forcing the sliding valve J away from its position against said latter
tube and driving the same against the circular flange h, and said steam passing out
through the holes or ports will raise the overflow valve K, and pass into the outside
atmosphere, immediately upon which a vacuum is formed in the water supply
chamber causing the lifting of water thereinto, and drawing the valve J back to its
position against the lifting tube.
The sliding valve in thus passing through the apertured wall ³ will stop or cut off
the circulation of the overflow in the overflow chamber, which momentary cessation
or stoppage will effect the establishment of the jet or column, the vacuum drawing
the water in the overflow chamber through the grooves or recesses of the sliding valve,
on into and through the tubes to the boiler.
Simultaneous with the drawing of the valve J to its normal position against
the lifting tube, the overflow valve is firmly closed and seals the air inlet. The
valve J being returned to its normal position when the column of steam and water
is established; a continuous passage way between the mouth of the combining tube
and the overflow is had through the grooves or recesses j', whereby any overflow
through the holes ' is drawn in at the mouth of the combining tube, thus enabling
water of a greater degree of heat to be used than is capable by any injector as
heretofore constructed.
In a steam injector provided with a secondary overflow as heretofore constructed,
such overflow has been kept tightly closed during the working of the injector; but
practical use has demonstrated that far better results are attained by preserving a
continuous passage way or communication between the combining tube and the over-
flow chamber.

page_text: Having now particularly described and ascertained the nature of my inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is:
1. The herein-described improved automatic steam injector having a continuous
communication between the mouth of the combining tube and the overflow chamber,
substantially as set forth.
2. The herein-described improved automatic steam injector having a continuous
communication between the mouth of the combining tube and the overflow chamber,
said communication being less during the working of the injector than in the starting
thereof, substantially as set forth.
3. A steam injector having an overflow chamber and the lifting and combining
tubes opening thereinto and having a continuous passage way or communication
therewith, as set forth.
4. As an improvement in steam injectors, the sliding valve having grooves or
recesses in its face, as set forth.
5. As an improvement in steam injectors having an overflow chamber and the
lifting and combining tubes opening thereinto, the sliding valve located at said opening
of the tubes, and having holes or ports for forming a continuous passage way,
substantially as set forth.
6. As an improvement in steam injectors having the overflow chamber, the com-
bining tube having holes or ports at or near its rear end, the sliding valve located
on said combining tube for closing said holes or ports in the starting of the injector,
and having grooves or recesses for forming a continuous passage way between the
mouth of said combining tube and the overflow chamber, substantially as set forth.
7. The herein-described improvement in steam injectors comprising the lifting and
combining tubes, and the valve sliding on said combining tube and having its normal
position against said lifting tube, as set forth.
8. As an improvement in steam injectors having a water inlet arm, the water valve
located in said arm and having a fixed movement and means for indicating the same,
substantially as set forth.
9. As an improvement in steam injectors having a water inlet arm, the water
inlet valve located in said arm and having two heads or disks fitted on dissimilar
screws, and the spindle carrying a finger or pointer, substantially as set forth, said heads
or disks being movable in opposite directions, as stated.
10. As an improvement in steam injectors, the water inlet valve having the two
heads or disks, and the spindle provided with right and left screw threads upon
which said heads or disks are disposed, substantially as set forth.
11. As an improvement in steam injectors, the water inlet valve, having the two
heads or disks, the spindle provided with opposite screw threads, the plug through
which said spindle is passed, and the guide rod projecting from said plug through
said heads or disks, substantially as set forth.
12. In a steam injector, the combination with the water inlet arm, of the valve
having oppositely movable heads or disks, the plug, the graduated scale, and the
spindle having a finger or pointer, substantially as set forth.
13. In a steam injector, the combination with the water inlet arm having the
opposite circular extensions, of the plug having the flange provided with a scale, the
heads or disks, the spindle having right and left hand screw threads, the guide rod
projecting from said plug, and the finger or pointer, substantially as set forth.
Dated this 16th day of January 1990.
JOHN DESMOND.
Jensen & Son,
77, Chancery Lane, London, W.C., Patent Agents.