An Improvement in Gas Pressure Regulators.
Year: 1889

page_text: ate of Application, 7th Mar., 1389
oecification Accepted, 13th Apr., 1889
COMPLETE SPECIFICATION.
An Improvement in Gas Pressure Regulators.
I, WILLIAM FREDERICK FLETCHER, of the firm of G. J. Parkinson & Co., of
Penn Street, Carzon Street. Birmingham, Warwickshire, Gas Pressure Regulator
Manufacturer, 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 reference to those gas pressure regulators in which the pressure
of the gas is regulated by a conical or other stein or valve depending from a
movable float disc or diaphragm and operating in or against the gas inlet orifice
or orifices such for instance as the kind of gas pressure regulator described in the
Specification of G. J. Parkinson's Letters Patent No. 3639 A.D. 1878 in which
the float is provided with a conical stem or valve to operate in the inlet orifice.
Heretofore the base of the said conical or other stem or valve has been exposed
to the pressure of the unregulated gas which, being variable, caused the float and
the pressure of the gas at the outlet of the regulator to fluctuate, which defect it is
the object of this invention to overcome.
According to my invention I prevent the unregulated gas acting upon the base
of the conical or other stem or valve and arrange for only regulated gas to have
access to the same thereby preventing any sudden inrush of gas or change of
pressure causing the float to fluctuate.
I will describe my invention by referring to the accompanying drawing on which
Fig. 1 represents in sectional elevation a combined gas burner and regulator with
my invention applied and Fig. 2 shews separate views of the float with its conical
valve and the shell or cylinder in which the float and valve work; Fig. 3 represents
in sectional elevation a modified form of the regulator illustrated by the preceding
Figures, and Fig. 4 is the cylinder or shell of the same separately; Fig. 5 shews
how my invention is applied to a diaphragm gas pressure regulator and Fig. 6
illustrates a mercurial gas pressure regulator with my invention applied.
The same letters of reference indicate the same parts in all the Figures.
Referring firstly more particularly to Figs. 1, 2, 3 and 4, a is the inlet to the
regulator and b is the shell or cylinder in which the float crises and falls, d is the

page_text: conical stem or valve depending from the lower side of the float c and working
through the hole or valve e in the bottom of the cylinder b. In carrying out my
invention I provide a small cylinder below the base of the cylinder b. This
cylinder is closed at the bottom and is made of such a size that the conical valve
or stem d will fit easily in it and it is by preference formed in a piece with the
base of the cylinder as shewn. At or near the top of the cylinder fis a side hole
or side holes y admitting gas to the hole e. In the conical stem or valve d I
provide a passage which admits regulated gas from the cylinder c to the underside
of the conical valve or stem d. The gas which acts upon the underside of the valve
or stem will thus be regulated gas at the same pressure as the gas in the cylinder b
acting upon the underside of the float or disc e, instead of unregulated gas at a
varying pressure, and the regulator will thus be perfectly reliable whatever the
pressure of the unregulated gas may be.
In the example illustrated by Figs. 3 and 4 instead of the regulated gas passing
through a hole or holes in the Hoat or valve c to the outlet, the gas passes from the
underside of the float e through a side hole or holes in the cylinder and then up past
the regulating screw to the outlet A.
In the gas pressure regulator illustrated by Fig. 5 in which the conical or other valve
or stem d is fixed to a diaphragm L, and in the mercurial regulator illustrated by
Fig. 6 in which the valve or stem is fixed to the float c, a cylinder or recess fis
employed for the valve or stemn to work in as in the examples illustrated by
Figs. 1, 2, 3 and 4 and the conical or other valve or stem d is provided with the
hole has and for the purpose above described.
Fig. 7 illustrates a modified form of the valve or stem d which in this example
instead of being conical is cylindrical and cuts off or regulates the gas by moving
against the inlet orifices g.
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
>>
1st. In gas pressure regulators of the kind herein referred to in which the pressure
of the gas is regulated by a conical or other shaped stem or valve depending from a
movable float disc or diaphragm and operating in or against the gas inlet orifice or
orifices, the employment of means substantially as hereinbefore described for
preventing the unregulated gas acting upon the underside of the said conical or other
shaped stem or valve and for admitting regulated gas thereto.
2nd. In a gas pressure regulator and in combination with the float c or a
diaphragm and the depending conical or other shaped valve or stem d operating in
the gas inlet orifice e, the cylinder or recess enclosing the base of the valve or
stem & for the purposes and substantially as hereinbefore described.
Dated this 6th day of March 1889.
CHARLES BOSWORTH KETLEY,
Agent for the Applicant.