An Improved Apparatus for Feeding Powders or Liquids into Steam Boilers.
Year: 1896

page_text: Date of Application, 9th July, 1896
Complete Specification Left, 23rd Feb., 1897-Accepted, 22nd May, 1897
PROVISIONAL SPECIFICATION.
An Improved Apparatus for Feeding Powders or Liquids into
Steam Boilers.
DAVID SHORT Marine Engineer 3 Jackson Street Chester Road Sunderland do
hereby declare the nature of this invention to be as follows:-
The apparatus is a large gun metal, funnel shaped receiver made in various sizes,
with steam tight screwed top. The bottom or outlet is fitted with a cone shaped
ground union and nut.
Towards the top there is a small non-return valve to admit the pressure to
displace the liquid or powders to be injected.
The internal arrangement consists of a double valve to regulate the supply,
the said valve being placed outside or inside as required by users to meet their
particular needs.
The whole to withstand 400 lbs. test pressure.
COMPLETE SPECIFICATION.
An Improved Apparatus for Feeding Powders or Liquids into
Steam Boilers.
DAVID SHORT Marine Engineer 3 Jackson Street Sunderland 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 :-
The body of the apparatus is made parallel in the centre, and rounded off
towards the top, which is contracted and strengthened to receive the cover. It is
made and screwed a convenient size to allow of easy filling and access to the inside
for cleaning or removing any deposit that may accumulate.
The cover is turned to fit neatly over the top with a cupped flange to prevent the
jointing from being blown out. The top of the cover is fitted with a loose handle
to give more purchase in tightening it up.
The lower end of the body is decreased in diameter with a long taper to allow of
a free discharge of the contents.
There is a branch cast on near to the bottom to take an ordinary
cock.
drain
The internal valve for regulating the supply is inverted, working in a chamber
of larger diameter, this valve, is a wing valve, with a long spindle, working through
a guide hole in a cross bar of a screwed cap fitted into the bottom of the injector.
Upon this valve spindle there is a silver spring, nicely adjusted, to keep the valve
up to the face and no more. The gravity of the contents will open it, and if there
should be a pressure of 1 lb., more upon the back of this valve in excess to that in
D
027

page_text: the chamber of the apparatus it will automatically close. The spring acts between
the cross bar of the cap and the back of the valve:
Into the bottom of the screwed cap is fitted a "wheel valve or "gland cock,
terminating with a ground union and coupling nut. This valve or cock is placed
outside to be more convenient for overhauling in case of repairs. A cock is more
preferable as it allows of a more free flow of the contents and assists in the more
accurate supply of the composition used.
When the apparatus is to be fitted to two or more boilers direct, this cock has a
branch on each side, at a convenient angle to suit requirements.
Towards the top of the apparatus body there is another branch cast upon it, into
this branch there is fitted a non-return angle valve to retain the pressure which is
received from the momentum of the feed pump.
The spigot of this valve is carried well into the apparatus chamber. Fixed to
the end of this spigot (by an ordinary coupling nut) is a flanged " copper or brass
pipe leading down to within "to" from the bottom of the chamber. This pipe
dilutes and keeps the contents in circulation. Upon the back of the apparatus
there is a bracket for fixing the apparatus to a bulkhead or other convenient
place.
DRAWINGS.
On Sheet 1, the apparatus is shewn complete as fitted to deliver its contents
into the main feed delivery pipe. A, is the body. B, is the non-return angle
valve, with wheel on the top of the spindle to regulate the lift. C, the screwed
cover. D, the screwed cap at the bottom. K, the delivery cock, which is coupled
to the delivery pipe by "copper piping. J, drain cock.
On Sheet 2, the apparatus is shewn in section, without the cocks K, and J.
A, being the body. B, shows the angle valve in part section, the lower end shows
the nut and union which is coupled up with "copper pipe to a valve fitted into the
feed pump chamber, the cover of this valve is of ordinary gland and nut, with
asbestos packing, the spindle is screwed into the spigot of the cover as shown
at S. b, shows the valve. P, shows the internal pipe for circulating, this pipe is
fitted to end of the angle valve spigot by an ordinary coupling nut. C, cover.
D, screwed cap. F, valve for regulating the supply, with the spring on the back
resting between the cap at the point E. H shows the bracket. d shows the plan
of the cap at E.
To fill 1st. Shut the valve B, then cock K. Open the drain J (to relieve the
pressure) and unscrew the cover. After all the water has been drained off, shut J.
The composition can then be put into the chamber and cover again screwed on.
Open K, then open B. From each stroke of the feed pump it receives a small
quantity of water, diluting the contents and forcing a small portion into the main
feed pipe, or boilers. The extra pressure being obtained from the momentum of
the feed pump through the valve B. Delivering through K.
This apparatus can be made of gun metal, cast iron, or steel.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same has to be performed, I declare that what I
claim is:
Its construction, position and adjustment, of the various valves and cocks, with
the arrangement of internal pipe for diluting. The whole apparatus as a complete
feeder for boiler compositions only.
Dated this 22nd day of February 1897
DAVID SHORT.