Improvements in the Construction of Safety Valves, specially applicable to High Pressure Hot Water Heating Apparatus.
Year: 1893

page_text: Date of Application, 29th Sept., 1893
Complete Specification Left, 27th Dec., 1893-Accepted, 17th Feb., 1894
PROVISIONAL SPECIFICATION.
Improvements in the Construction of Safety Valves, specially
applicable to High Pressure Hot Water Heating Apparatus.
I, RICHARD RUNDLE, of Wellington Grove, Idle, in the County of York,
Hot Water Engineer, do hereby declare the nature of this invention to be as
follows:-
This invention relates to certain improvements relating to safety valves, and has
for its object, the construction of the same in a manner that they are specially
applicable for high pressure heating apparatus, and to so arrange the valves that,
when under pressure and relieved, the water will not fly upwards and endanger
persons near thereto by scalding.
I accomplish my object by mounting a lever to a link supported by the valve
stem, and attaching to the said lever a bar, having a hole bored therein some
distance in the direction of its axis. At the bottom of the said hole, provision may
be made for the reception of a soft metal or alloy for the formation of the valve
seating.
Engaging with the hole in said bar is a valve stem turned to slide freely therein
and grooved in a longitudinal direction, the valve stem having a hole through the
centre communicating with the interior of the heating apparatus. A valve facing
is formed at the top which when in contact with the seating closes the communica-
tion with the interior of the heating apparatus.
On raising the lever to open the valve, the hot water under pressure will flow
down the before mentioned grooves towards the base of the valve.
Dated this 27th day of September 1893.
JOHN WAUGH,
Agent.
COMPLETE SPECIFICATION.
Improvements in the Construction of Safety Valves, specially
applicable to High Pressure Hot Water Heating Apparatus.
I, RICHARD RUNDLE, of Wellington Grove, Idle, in the County of York,
Hot Water 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 certain improvements relating to safety valves, and has
for its object, the construction of the same in such a manner that, they are specially
applicable for high pressure heating apparatus; and to so arrange the valves that,
when under pressure and relieved, the water will not fly upwards and endanger
persons near thereto by scalding.
In describing my invention in detail, reference is made to the accompanying
sheet of drawings, in which
Fig. 1 represents an elevation of a safety valve arranged according to my
invention.
Fig. 2 is a detached view of the valve seating stem.
Fig. 3. is a plan of the same and
Fig. 4. a section through the valve seating cover.
Like letters indicate like parts where they appear.

page_text: The valve seating stem is indicated by the letter A. and is prepared with lugs B.
between which is secured a link C. by a pin D. the opposite end of the link is
attached by a pin E. to a lever F. to which is also attached by a pin G. a hollow
bar H. forming the valve seating cover, the valve seating S. being formed of soft
metal, such as tin or a suitable alloy.
The upper portion of the valve stem at A' is turned to slide freely in the hole of
the valve seating cover H. and is grooved in a longitudinal direction at J. the
stem A. having a hole K. through the centre, communicating with the interior of
the heating apparatus.
A flat valve facing is formed at the top of the stem A' and when in contact with
the seating S. of tin or suitable alloy, closes the communication with the interior
of the apparatus.
The lever F. is provided with a weight W. and on raising the lever to open the
valve, the hot water or steam, as the case may be, will flow from the hole K. down
the before mentioned grooves J. towards the base of the valve, thus diverting the
escaping hot water in a direction that the liability of the attendant being scalded is
reduced.
Fig. 5. shows a valve stem fitted with a dead weight block W' provided
with a flange at the bottom, for supporting additional weights should any be
required.
The interior of the dead weight block is hollow, and is provided with a seating
of tin or other suitable alloy, which rests upon the flat valve facing, in the same
manner as before described.
Having now particularly described and ascertained the nature of this inven
tion, and in what manner the same is to be performed, I declare that what I
claim is.-
A safety valve having a stem grooved at J. combined with a cover H. provided
with a valve facing S. of tin or suitable alloy, all arranged substantially in the
manner as shewn and described.
Dated this 23rd day of December 1893
JOHN WAUGH,
Agent.