Improvements in or Applicable to Reducing Valves.
Year: 1888

page_text: Date of Application, 29th Oct., 1888
Complete Specification Left, 19th July, 1889-Accepted, 24th Aug., 1889
PROVISIONAL SPECIFICATION.
Improvements in or Applicable to Reducing Valves.
I, WILLIAM REID, of Fenchurch Street, in the City of London, merchant, do hereby
declare the nature of the said Invention to be as follows:-
This Invention relates to certain improvements in or applicable to reducing valves
used in high pressure engines, the special object of the Invention being to mount the
valve trunnion in such a way as to dispense with the packing, piston or diaphragms as
hitherto generally used in existing reducing valves.
:
The valve trunnion is mounted in a top casting and has an internal arm linked to
the reducing valve which rests on its seating supported by a lower casting at a part
dividing the high and low pressure chambers of the casting. The valve trunnion has
also an external arm a depending extension of which is encircled by a spring by which"
the reducing valve is loaded as required.
The atmospheric area of the valve trunnion is exposed to the reduced steam pressure
which gives it an outward tendency, but in accordance with the present improvements
the part of the said top casting through which the valve trunnion projects is made with
an external truly turned valve seating, and the projecting part of the said trunnion is
made with an opposite truly turned valve facing which is borne against the said
opposite valve seating by means of a set screw passing through a bracket bolted or
otherwise suitably secured to the said upper casting and bearing against the outer end.
of the trunnion, causing the same to be retained in its working position and dispensing
with the packing, piston or diaphragms hitherto used.
Dated this 25th day of October 1888.
DAY, DAVIES & HUNT,
321, High Holborn, London, W.C., Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in or Applicable to Reducing Valves.
I, WILLIAM REID, of Fenchurch Street, in the City of London, Merchant, do hereby
declare the nature my said 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 in or applicable to reducing valves
used in high pressure engines, the special object of the Invention being to mount the
valve trunnion in such a way substantially as hereinafter described as to dispense with
the packing or diaphragmus as hitherto generally used in existing reducing valves.
The Invention is illustrated on the accompanying drawings in which Fig. 1.
represents a sectional elevation of a reducing valve embodying the present improvements.
Fig. 2. is an end elevation thereof partly in section, and Fig. 3. is a side elevation of
the set screw hereinafter referred to. Fig. 4. is a plan 4, and Fig. represents a
modification wherein a lipped valve is shown.
5, represents the valve trunnion, which, in accordance with the present improve-
ments, is mounted in a top casting, 6, and is provided with an internal arm, 7, con-
nected by a link, 8, to the reducing valve, 9, which rests on its seating, 10, supported
by a lower casting, 11, at a part, 12, dividing the high and low pressure chambers, 13, 14,
respectively, of the casting. The valve trunnion is also provided with an external
arm, 15, a depending extension, 16, of which is encircled by a spring, 17, bearing
between the overhanging bracket, 18, and the adjustable cup, 19, and by which the
reducing valve is loaded as required.

page_text: The atmospheric area of the valve trunnion is exposed to the reduced steam pressure
which gives it an outward tendency, but in accordance with the present improvements
the part of the said top casting, 6, through which the valve trunnion projects is made
with an external truly turned valve seating, 20, and the projecting part of the said
trunnion is made with an opposite truly turned valve facing, 21, which is borne
against the said valve seating, 20, by means of a set screw, 22, passing through a
bracket, 23, bolted as at, 24, or otherwise suitably secured to the casting, 6, the screw
bearing against the outer end of the trunnion and causing it to be retained in its
working position and dispensing with the packing:or diaphragms hitherto used.
In the modification. represented in. Fig. 5. the reducing, valve is shown as formed
with a surrounding lip, 25.
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.
1. The herein before described improved method of mounting the valve trunnion of
reducing, valves.
2. The connection of the reducing valve with an external weighting lover by
means of a trunnion to which the valve and weighting lever are severally connected
and which is mounted and retained in working, position in the improved manner
herein before described.
3. The formation of the valve trunnion with an external truly turned valve facing,
and of the supporting casting thereof with a corresponding valve seating, and the use
in combination therewith of a set screw or its equivalent for causing the valve trunnion
to be borne against the said seating and-retained in its working position substantially
as hereinbefore described.
Dated this 13th day of Tule 1880
DAY, DAVIES & HUNT,
321, High: Holborn, London, W.C., Agents for the Applicant.