Improvements in Automatic Air Escape and Liquid Expansion Relief Valves for Water and other Conduits.
Year: 1896

page_text: Date of Application, 17th Apr., 1896
Complete Specification Left, 16th Jan., 1897-Accepted, 3rd Apr., 1897
Improvements in Automatic Air Escape and Liquid Expansion
Relief Valves for Water and other Conduits.
I, THOMAS CHARLES OLNEY, of 417, Stretford Road, Old Trafford, Manchester, in
the County of Lancaster, Engineer, do hereby declare the nature of this invention to
be as follows:
This invention has for its object to provide an automatic air escape and liquid
expansion relief valve for water and other conduits, which is more reliable and
efficient in action and less liable to get out of order than those heretofore
in use.
To this end I employ a vessel, say cylindrical in shape, having an arm furnished
with an adjustable weight and adapted to oscillate upon a part extending from a
tubular elbow piece, which is screwed into the conduit from which the air is to
escape or in which the pressure of liquid is to be relieved. The vertical arm of the
said elbow piece is formed with a division plate reaching nearly to the top thereof
and extending a little below ite lower end, so as to form two passages and create
a syphon action. The horizontal arm of the said elbow piece is brought into
communication with the interior of the lower part of the said vessel by means of a
flexible or hinged pipe.
In the upper part of the said vessel is arranged a perforated pipe, which is
passed through the lower part and projects towards the centre of oscillation of the
said vessel. This projecting pipe part, in conjunction with a rubber or other
suitable seating secured to the part upon which the said vessel is adapted to
oscillate, serves as the air escape and pressure relief valve in the following
manner―
When the conduit is empty of liquid the weight upon the arm of the said vessel
retains the orifice of the said air escape and pressure relief tube off its seating,
thus allowing the air from the conduit to escape freely through the said elbow, by
way of the said cylinder and perforated pipe therein; whilst when the conduit fills
with liquid, the latter passes through the said flexible or hinged pipe into the said
vessel and when overcoming the weight on the said arm causes the vessel to fall
and bring the said air escape pipe against its seating thus cutting off communication
between the conduit and atmosphere.
Dated this 16th day of April 1896.
F. BOSSHARDT & Co.,
Agents to Applicant.
Improvements in Automatic Air Escape and Liquid Expansion
Relief Valves for Water and other Conduits.
I, THOMAS CHARLES OLNEY, of 417, Stretford Road, Old Trafford, Manchester,
in the County of Lancaster, 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 has for its object to provide an automatic air escape and liquid

page_text: expansion relief valve for water and other conduits, which is more reliable and'
efficient in action and less liable to get out of order than those heretofore
in use.
And in order that my invention may be more fully understood I have caused
to be appended hereunto one sheet of drawings marked with letters of reference
indicating like parts in the various figures.
Fig. 1 is a longitudinal section, Fig. 2 an end view, Fig. 3 an elevation, Fig. 4 a
plan of my approved automatic air escape and liquid expansion relief valve, and
Fig. 5 shows the same applied to a pipe.
In carrying out my invention and referring to the figures generally I employ a
vessel a, say cylindrical in shape, having an arm b with pivots b', b' and an adjust-
able weight c. This vessel and weight is adapted to oscillate upon arms d, d forming
a part extending from a tubular elbow piece e which is screwed into the pipe or
conduit, see Fig. 5, from which the air is to escape or in which the pressure of
the liquid is to be relieved. The vertical arm of the elbow piece e may be formed
with a division plate e reaching nearly to the top thereof and extending a little
below its lower end, so as to form two passages g, g', and create a syphon action.
The slightly inclined arm of the elbow piece e is brought into communication with
the interior of the lower part of the vessel a by means of a flexible pipe h or hinged
pipe as will be readily understood.
In the vessel a is employed a pipe i, , the part of which is perforated and the
parti, passing through the bottom projects a short distance below towards the centre
of oscillation of the vessel a. The said perforated pipe part may however be
dispensed with and the part i have its orifice near the top of the vessel a, as shown
in dotted lines, Fig. 1. The projecting pipe part i, in conjunction with a rubber or
other suitable seating k secured to the arms d, d, serves as the air escape and pressure
relief valve in the following manner-
When the conduit f is empty of liquid the weight c upon the arm 6 retains the
orifice of the air escape and pressure relief pipe i off its seating k, as shown in Fig. 1,
thus allowing the air from the conduit to escape freely through the elbow pipe e by
way of the vessel a and perforated pipe i, therein, whilst when the conduit fills
with liquid, the latter passes through the flexible or hinged pipe h into the vessel a
and when overcoming the resistance or gravity of the weight c on the arm 6 causes
the vessel a to fall and bring the air escape pipe i against its seating k thus cutting
off communication between the conduit and the atmosphere.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim, is-
In automatic air escape and liquid expansion relief valves for water and other
conduits, a balanced vessel a communicating with the said conduit and having a pipe
which allows the air from the conduit to escape and when the conduit is full abuts
against a seating and, cuts off communication between the conduit and the
atmosphere, all substantially as set forth.
Dated this 15th day of January 1896.
F. BOSSHARDT & Co.,
4, Corporation Street, Manchester, Agents to Applicant.