Improvements in or relating to Steam Boiler Feed Injectors.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improvements in or relating to Steam Boiler Feed Injectors.
I, DAVID VAUGHAN, of 46, Upper Marion Street, Newport, Monmouthshire.
Stationary Engine-driver, do hereby declare the nature of this invention to be as
follows:-
This invention relates to injectors employed in feeding water to steam boilers.
This invention, which is mainly applicable to the boilers of locomotive engines.
but is applicable also to other kinds of boilers, consists in the provision of a
valve placed in the overflow pipe of injectors and operating to prevent admission
of air to the injector through the said pipe and, consequently, to the boiler.
The valve, which may be a winged disc, or of other pattern, has a seat provided
for it in the overflow pipe. The valve is normally closed, that is to say, is
down on its seat, preventing communication between the injector and the over-
flow pipe outlet. When the injector is first put into operation, the overflow
water passes into the overflow pipe and, raising the valve, escapes.
As soon,
however, as the necessary vacuum is created, and the overflow ceases, the valve
closes and so prevents an inrush of air to the injector and subsequently to the
boiler.
As an auxiliary in blocking out the air from the injector, the valve aforesaid
is kept constantly immersed in a water trap formed by shaping the outflow pine
to a bend and keeping it supplied with water from an outside source of supply.
The pipe by which the water is supplied to the trap has a cock for controlling
the supply, and the trap has an overflow nozzle which serves as a guide to indicate
whether or not the trap is charged.
A vacuum gauge connected to the injector serves to indicate efficiency in
feeding.
NICHOLAS WATTS.
Chartered Patent Agent, Bristol.
COMPLETE SPECIFICATION.
Improvements in or relating to Steam Boiler Feed Injectors.
I, DAVID VAUGHAN, of 46, Upper Marion Street, Newport, Monmouthshire,
Stationary Engine-driver, do hereby declare the nature of this invention and in
what manner the same is to be performed. to be particularly described and ascer-
tained in and by the following statement:-
This invention relates to injectors employed in feeding water to steam boilers.
This invention which is mainly applicable to the boilers of locomotive engines,

page_text: but is applicable also to other kinds of boilers, consists in the provision of a
valve placed in the overflow pipe of injectors and operating to prevent admission
of air to the injector through the said pipe and consequently, to the boiler.
The valve A, which may be a winged disc or of other pattern, has a seat B,
provided for it in the overflow pipe. The valve is normally closed, that is to
say, is down on its seat, preventing communication between the injector and
the overflow pipe outlet.
When the injector is first put into operation, the overflow water passes into the
overflow pipe and, raising the valve escapes. As soon however as the necessary
vacuum is created and the overflow ceases, the valve closes and so prevents an
inrush of air to the injector and subsequently to the boiler.
As an auxiliary in blocking out the air from the injector, the valve aforesaid
is kept constantly immersed in a water trap C, formed by shaping the overflow
pipe to a bend.
A vacuum guage D, connected to the injector serves to indicate efficiency
in feeding.
Having now particularly described and ascertained the nature of my. said
invention and in what manner the same is to be performed I declare that what
I claim is:-
-
1st. The placing of a valve & seat for valve in the overflow pipe of injectors
to exclude air from boiler.
2nd. The shaping of the overflow pipe to form a water trap.
3rd. The fixing of a vacuum guage to injector to indicate working of injector.
Dated this 94th dot of Aussi*1000
DAVID VAUGHAN: