Improvements in or connected with Water Gauge Fittings for Steam Boilers and the like.
Year: 1892

page_text: Date of Application, 18th Mar., 1892
Complete Specification Left, 16th Dec., 1892-Accepted, 21st Jan., 1893
PROVISIONAL SPECIFICATION.
Improvements in or connected with Water Gauge Fittings for Steam
Boilers and the like.
I, JOHN SCOTT, of Bute House, Cannhall Road, Leytonstone, in the County
of Essex, Mechanical Engineer, do hereby declare the nature of this invention to
be as follows:-
in a closed
My invention relates to improved means for automatically preventing the escape
of steam and water from a steam boiler or the like in case the gauge glass breaks.
In carrying out my invention I employ what I term a duplex valve, each end
of which is adapted to bear against a corresponding seat and which is so arranged
that both ends cannot be upon their seats at the same time. In connection with this
duplex valve is a rod carrying a lever or arm engaging with the said duplex valve
and having upon its end which projects outside the casing in which the duplex
valve works a handle. Upon the said rod is a valve which when the duplex valve
is in such a position that both ends thereof are away from their seats
position. In connection with the seating of this valve is an inclined surface
against which a projection upon the said rod bears so that when the rod is moved
the valve upon the said rod will be moved slightly backwards and so allow the
discharge of steam or water. In connection with the handle upon the said rod is
a pointer which serves to indicate when the valve is in its normal position. With
this arrangement of valves should the gauge glass break so that the pressure upon
one end of the duplex valve is relieved the excess of pressure on the other end of
the duplex valve will close the same against its seat and so prevent the escape of
steam and water from the boiler: at the same time the handle carrying the indicator
is moved. This movement of the handle and indicator in connection with the
duplex valve is of great advantage as should the duplex valve be inadvertently
placed in a closed position this is at once indicated.
In order to clear the glass it is only necessary to turn the rod whereby the steam
or water is allowed to escape past the valve thereon.
It is to be understood that one of my improved fittings is arranged in connection
with each end of the gauge glass, the said fittings having the sockets for carrying
the glass formed upon them, or being placed in other suitable positions and
connected by pipes with the sockets carrying the glass.
Dated the 19th dow of Mob 1800
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in or connected with Water Gauge Fittings for Steam
Boilers and the like.
1, JOHN SCOTT, of Bute House, Cannhall Road, Leytonstone, in the County
of Essex, Mechanical 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 :-
My invention relates to water gauge fittings and has for its object to automatically
prevent the escape of steam and water from a steam boiler or the like in case the
gauge glass breaks, and to reduce the number of cocks or valves usually employed.
In carrying out my invention I employ two fittings adapted to be fixed to the
boiler and to carry the gauge glass between them. The lower fitting is provided

page_text: water from the boiler through the lower fitting, and has also the effect at the same
time of moving the valve away from its seat so that steam can pass to the drain
pipe p. If, however, the lever handle is moved to place the pointer at "W" the
valve fis brought against its seat so that the passage of steam through the glass
prevented and water allowed to escape past the valve e to the drain pipe.
is
In case the gauge glass breaks the rush of steam through the upper fitting and
the rush of water through the lower fitting would move the valves and e against
their seats. The employment in the upper fitting of the arm w bearing against the
inclined side of the notch in the cam surface w¹ causes sufficient resistance to
prevent the valve 9 from moving when steam is being drawn off through the lower
fitting.
By the use of the fitting hereinbefore described it will be readily understood
that in order to test the water gauge it is only necessary to move the lever k in one
or the other or in both directions.
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 :-
1. In water gauge fittings the combination of a double ended valve, a spindle for
operating the said double ended valve having a valve upon it and a cam surface and
lever arm or projection for causing the latter valve to move away from its seat
when the valve spindle is operated to move the double ended valve, all substantially
as, and for the purposes described.
2. The manufacture and use of the improved water gauge fittings hereinbefore
described and illustrated in the accompanying drawings.
Dated the 16th day of December 1892.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.