Year: 1879

page_text: I, JAMES STOTT, of Oldham in the County of Lancaster seck leave to amend the
Specification of Letters Patent N° 29 of 1879 as shown in red ink in the copy
of the original Specification hereunto annexed: By striking out, on page 3 of said
copy of the Specification, lines 6, 7, and 8, being the whole of the First and Second
claims; By substituting the word "First" for the word "Thirdly" on line 9 of the
same page; And by striking out the first four letters of the word "within" in
line 10 of the same page thereby leaving the word "in" only.
My reasons for making this amendment are as follows:-
That the claims as originally constructed carry or tend to carry the Invention
beyond that described in the Provisional and in the Final Specifications.
M
The 11th day of October
In the matter of the application made by James Stott for leave to amend the
Specification of Letters Patent N° 29 of the year 1879.
I hereby grant leave to the said James Stott to amend the said Specification in
the manner proposed.

page_text: LETTERS PATENT to James Stott, of Oldham, in the County of Lancaster,
Dentist, for the Invention of "IMPROVEMENTS IN GAS PRESSURE REGU-
LATORS."
Sealed the 1st July 1879, and dated the 3rd January 1879.
PROVISIONAL SPECIFICATION left by the said James Stott at the Office of
the Commissioners of Patents on the 3rd January 1879.
JAMES STOTT of Oldham in the County of Lancaster, Dentist.
IN GAS PRESSURE REGULATORS."
"IMPROVEMENTS
My Invention relates to the apparatus employed to reduce excessive pressure of
gas on its admission to the service pipes in order to obtain greater uniformity of
pressure.
In the form of apparatus to which my Invention relates a reducing valve is con-
nected with a diaphragm which is formed with a flanch or part which dips into an
annular trough of mercury. In practice I have found that the mercury or some of
it has escaped from the said trough and the principal object of my Invention is to
remedy this defect. To this end I in the first place form the said trough separately
from the casting which constitutes the shell or body of the regulator and I cement
the said trough in position or secure it in position in a suitably gas-tight manner.
I form the said trough of the same material as the body of the regulator or of a
suitable material and if desirable I coat or preparo it to resist the penetrative action
of the mercury.
I consider earthenware porcelain glass and other moulded materials of a like
nature to be the most suitable materials to be employed in the manufacture of the
said troughs.
In the second place I form the said troughs with inner shields to check the over-
flow of the mercury. I extend the inner margin of the trough inwards towards the
valve spindle and I also prefer to extend it upwards so as to form a surface declining
towards the said trough. In one form of trough the said extension consists of a
cone having an orifice at its apex through which the said spindle passes.
My Invention is applicable to gas regulators having rectangular troughs or troughs
or receptacles for mercury of other forms than annular.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said James Stott in the Great Seal Patent Office on the 2nd July 1879.
- JAMES STOTT of Oldham in the County of Lancaster Dentist.
IN GAS PRESSURE REGULATORS."
IMPROVEMENTS
My Invention relates to the apparatus employed to reduce excessive pressure of
gas on its admission to the service pipes in order to obtain greater uniformity of
pressure. In the form of apparatus to which my Invention relates a reducing valve
is connected with a diaphragm which is formed with a flanch or part which dips
into an annular trough of mercury. In practice I have found that the mercury, or
some of it has escaped from the said trough and the principal object of my Inven-
tion is to remedy this defect. To this end I in the first place form the said trough
separately from the casting which constitutes the shell or body of the regulator and
I cement the said trough in position or secure it in position in a suitably gas-tight
manner. In the second place I form or provide the said troughs with inner shields
to check the overflow of the mercury. My Invention is.applicable to gas regulators
having rectangular troughs or troughs or receptacles for mercury of other forms
than annular.
And in order that my Invention may be fully understood I have attached here-
unto a Sheet of Drawings made about the full size of the example selected for
illustration and marked with letters of reference. Referring to the said Drawings
Fig. 1 represents a vertical section and Fig. 2 a plan of a mercury trough con-
structed in accordance with my Invention. In the example the said trough is of an
annular form. In practice I form the said trough of glass by pressure within a
suitable mould but it may be formed of earthenware porcelain or other moulded
material or of the same material as the body of the regulator as, for example of
cast-iron in which case I prefer to enamel coat or prepare it to resist the penetra-
tive action of the mercury. I now consider glass or earthenware to be the best
material to be used in the formation of the said trough. Fig. 3 represents a section
of one of the improved mercury troughs formed with an inner shield e' in accordance
with the second part of my Invention. In the example the said shield is formed in
ono piece with the trough by extending the inner margin of the trough inwards
and upwards towards the centre so as to form a central cone in the apex of which
is an aperture as clearly indicated in the Drawing. Fig. 4 represents a vertical
section through the centre of a completo gas regulator constructed in accordance
with my entire Invention. In this example a is the shell or body of the regulator
which is ordinarily made of cast-iron, b is the cover of the same, and c is my
improved mercury trough which is of the form indicated in Fig. 3. The said
trough rests upon the bottom a¹ of the diaphragm chamber d and is so suitably
cemented or secured in position as that a gas-tight-joint is formed between the inner
wall of the chamber d and the exterior wall of the said trough. The valve spindlo e
which is connected with the diaphragm passes through the central aperture in
the conical shield c'. It will be seen that the gas regulator when charged with
mercury may be shaken to a great extent when in transit from one place to another
and may even be inverted and restored to its correct position without the mercury
finding its way into the lower gas passages. To prevent the mercury escaping at
the hole in the cover through which the valve spindle passes I attach a tube to

page_text: the crown of the said cover or form a tubular projection thereon the said tube
surrounding the said hole and preventing the outflow of the mercury in the case of
the inversion of the regulator. I do not confine myself to the annular form of the
trough nor to the conical form of the shield c¹ nor to the formation of the said
shield in one piece with the said trough as it may be separately formed, and be
fitted or secured to the trough in a suitable manner or somewhat as indicated in
Fig. 5 which also indicates the manner in which the said shield may be applied to
ordinary gas regulators having their mercury troughs cast in one piece with the
main body or shell of the regulator.
Having now fully set forth and indicated the nature of my said Invention and
the manner in which I carry and may carry the same into practical effect I would
have it to be understood that I claim-
First. The complete gas regulator substantially as set forth and indiented herein
before and in and by the accompanying Drawings.
Secondly. Providing gas regulators with glass or earthenware mercury troughs.
First. Making the mercury trough in a separate piece and securing it in
position within the body of the gas regulator substantially as set forth and
indicated.
And, lastly. The formation of mercury troughs with or the application thereto of
the shields substantially as and for the purpose set forth and indicated.
In witness whereof I the said James Stott have hereunto set my hand and
seal this Thirtieth day of June in the year of our Lord One thousand eight
hundred and seventy nine.

page_text: This Specification was, upon the 27th day of November 1886, further amended
under Sections 18 to 21 of the Patents, Designs, and Trade Marks Act, 1883.
[The New Amendments only are shown in erased and italic type.]
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said James Stott in the Great Seal Patent Office on the 2nd July 1879.
"IMPROVEMENTS
JAMES STOTT of Oldham in the County of Lancaster Dentist.
IN GAS PRESSURE REGULATORS."
My Invention relates to the apparatus employed to reduce excessive pressure of
gas on its admission to the service pipes in order to obtain greater uniformity of
pressure. In the form of apparatus to which my Invention relates a reducing valve
is connected with a diaphragm which is formed with a flanch or part which dips
into an annular trough of mercury. In practice I have found that the mercury, or
some of it has escaped from the said trough and the principal object of my Inven-
tion is to remedy this defect. To this end I in the first place form the said trough
separately from the casting which constitutes the shell or body of the regulator and
I cement the said trough in position or secure it in position in a suitably gas-tight
manner. In the second place I form or provide the said troughs with inner shields
to check the overflow of the mercury. My Invention is applicable to gas regulators
having rectangular troughs or troughs or receptacles for mercury of other forms
than annular.
And in order that my Invention may be fully understood I have attached here-
unto a Sheet of Drawings made about the full size of the example selected for
illustration-and-marked with letters of reference. Referring to the caid Drawings
Fig. 1 represents a vertical section and Fig. 2 a plan of a mercury trough con
structed in accordance with my Invention. In the example the said trough is of an
anuular form. In practice I form the said trough of glass by pressure within a
suitable mould but it may be formed of earthenware porcelain or other moulded
material or of the same material as the body of the regulator as, for example of
cast-iron in which case I prefer to enamel coat or prepare it to resist the penetra-
tive action of the mercury. I now consider glass or earthenware to be the best
material to be used in the formation of the said trough. Fig. 31 represents a section
of one of the improved mercury troughs e formed with an inner shield c¹ in accordance
with the second part of my Invention. In the example the said shield is formed in
one piece with the trough by extending the inner margin of the trough inwards
and upwards towards the centre so as to form a central cone in the apex of which
is an aperture as clearly indicated in the Drawing. Fig. 42 represents a vertical
section through the centre of a complete gas regulator constructed in accordance
with my entire Invention applied in it. In this example a is the shell or body of the
regulator which is ordinarily made of cast-iron, & is the cover of the same, and c is my
improved mercury trough which is of the form indicated in Fig. 1. The said
trough rests upon the bottom a' of the diaphragm chamber d and is so suitably
cemented or secured in position as that a gas-tight-joint is formed between the inner
wall of the chamber d and the exterior wall of the said trough. The valve spindle e
which is connected with the diaphragm passes through the central aperture in
the conical shield c'. It will be seen that the gas regulator when charged with
mercury may be shaken to a great extent when in transit from one place to another

page_text: and may even be inverted and restored to its correct position without the mercury
finding its way into the lower gas passages. To prevent the mercury escaping at
the hole in the cover through which the valve spindle passes I attach a tube g to
the crown of the said cover or form a tubular projection thereon the said tube
surrounding the said hole and preventing the outflow of the mercury in the case of
the inversion of the regulator. I do not confine myself to the annular form of the
trough nor to the conical form of the shield c' nor to the formation of the said
shield in one piece with the said trough as it may be separately formed, and be
fitted or secured to the trough in a suitable manner or somewhat as indicated in
Fig. 3 5 which also indicates the manner in which the said shield may be applied to
ordinary gas regulators having their merenry troughs cast in one piece with the
main body or shell of the regulator.
Having now fully set forth and indicated the nature of my said Invention and
the manner in which I carry and may carry the same into practical effect I would
have it to be understood that I claim-
First Making the mercury trough in a separate piece and securing it in
position within the body of the gas regulator cubstantially as set forth and
indiented.
And lastly. The formation of mercury troughs with or the application thereto of
the shields said troughs being formed separately from the shell of the regulator sub-
stantially as and for the purpose set forth and indicated.
In witness whereof I the said James Stott have hereunto set my hand and
seal this Thirtieth day of June in the year of our Lord One thousand eight
hundred and seventy nine.
Signed and sealed by the said
James Stott in the pre-
sence of
- EDWARD K. DUTTON.
Agent to the Patentee
St. Ann's Churchyard
Manchester.
JAMES STOTT. (L.S.)