Improvements in Gas Regulators.
Year: 1892

page_text: Date of Application, 21st July, 1892
Complete Specification Left, 20th Apr., 1893-Accepted, 17th June, 1893
PROVISIONAL SPECIFICATION.
Improvements in Gas Regulators.
I, LAWRENCE GARDNER, of Lund Street, Cornbrook, Manchester, Engineer,
do hereby declare the nature of this invention to be as follows:-
-
The object of my invention is to regulate the supply of gas to a burner, in such
manner as to maintain a constant steam pressure in a boiler heated by the gas
flame.
I connect a cylindrical valve with the index axis of an ordinary steam pressure
gauge in such manner that the valve turns with the axis. The valve is contained
within a cylindrical shell and this again is contained within a cylindrical case
forming part of or fixed to the case of the pressure gauge. These parts fit nicely
the one within the other.
The shell is capable of being turned round within the outer case by means of a
milled head at its rear end. A pin projecting forward from the shell moves a
second index or pointer; this is mounted upon the axis and it marks upon the dial
of the instrument the pressure and temperature to which the apparatus is adjusted.
The case in which the shell turns has two nozzles fixed upon its exterior one to
serve as the gas inlet, and this is connected with the supply pipe, and the other to
serve as the outlet, and this is connected with the gas burner. The shell has two
annular grooves on its exterior which serve as passages for the gas.
The gas from
the inlet nozzle enters one of the grooves and by a perforation it passes within the
shell. The cylindrical valve within the shell is open at its rear end so that the gas
is able to enter also within the valve and there is a narrow slit in the side of the
valve by which the gas can issue when the slit is uncovered.
The slit in the valve is uncovered so long as it is opposite any part of a wide
hole in the shell and the gas then passes through the hole into the exit groove of
the shell and thence to the exit nozzle and to the burner.
The movement of the cylindrical valve caused by increase of steam pressure
ultimately causes the slit in the valve to pass the edge of the hole in the shell and
then the gas supply is cut off and this takes place sooner or later according to the
position to which the shell has been set by turning the milled head upon it.
Arrangement is made to allow as a minimum enough gas to pass to prevent the
extinction of the flame. The gas may be passed in the other direction through the
instrument and it will work with equal efficiency.
The instrument above described admits of adjustment being made in either
direction without risk of injury to the apparatus even when the steam pressure is.
on as this valve may be turned beyond the point of cut off, this is an advantage
which instruments according to my invention have over gas regulators previously in
use for a like purpose.
Dotal his L.... 1000
CARPMAEL & Co.,
Agents.
COMPLETE SPECIFICATION.
Improvements in Gas Regulators.
I, LAWRENCE GARDNER, of Lund Street, Cornbrook, Manchester, 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 :-
The object of my invention is to regulate the supply of gas to a burner, in such

page_text: manner as to maintain a constant steam pressure in a boiler heated by the gas
flame.
I make use of a pressure gauge exposed to the steam pressure and having com-
bined with it a cylindrical gas valve connected with the axis of the pressure gauge.
This valve turns within a shell which for regulating the pressure can be turned
partly round. There are ports in the valve and shell which when they coincide
allow gas to pass to the burner.
The instrument is shown by the drawings annexed.
Figure 1 is a front view and shows the dial and pointers.
Figure 2 is a back view.
Figure 3 is a section on the line 3, 3, in Figure 2.
Figure 4 is a section on the line 4, 4, in Figure 3 and
Figure 5 is a section on the line 5, 5, in Figure 3.
a is a case containing the ordinary mechanism of a steam pressure gauge.
The pressure is indicated in pounds to the square inch by a finger & which points
to the figures on the graduated arc c.
I connect a cylindrical valve d with the index axis e of the ordinary steam
pressure gange in such manner that the valve turns with the axis. The valve is
contained within a cylindrical shell and this again is contained within a cylindrical
case g forming part of or fixed to the case of the pressure gauge. These parts fit
nicely the one within the other.
The shell is capable of being turned round within the outer case by means of
a milled head at its rear end. A pin projecting forward from the shell moves
a second index or pointer g*; this is mounted upon the axis e and it marks upon the
dial of the instrument the pressure and temperature to which the apparatus is
adjusted. The temperature Scale I usually graduate to degrees Fahrenheit. The
case g in which the shell turns has two nozzles gl and g² fixed upon its exterior
one to serve as the gas inlet, and this is connected with the supply pipe, and the
other to serve as the outlet, and this is connected with the gas burner. The shell f
has two annular grooves on its exterior which serve as passages for the gas.
The gas from the inlet nozzle g' enters one of the grooves f³ and by a perforation f
it passes within the shell. The cylindrical valve d within the shell is open at its
rear end so that the gas is able to enter also within the valve and there is a
narrow slit in the side of the valve by which the gas can issue when the slit is
uncovered.
The slit in the valve is uncovered so long as it is opposite any part of a wide
hole in the shell and the gas then passes through the hole into the exit
groove of the shell and thence to the exit nozzle g² and to the burner.
The movement of the cylindrical valve caused by increase of steam pressure
ultimately causes the slit in the valve to pass the edge of the hole in the shell
and then the gas supply is cut off and this takes place sooner or later according to
the position to which the shell has been set by turning the milled head upon
it. Arrangement is made to allow as a minimum enough gas to pass to prevent the
extinction of the flame. The gas may be passed in the other direction through the
instrument and it will work with equal efficiency.
The instrument above described admits of adjustment being made in either
direction without risk of injury to the apparatus even when the steam pressure is
on; as this valve may be turned beyond the point of cut off, this is an advantage
which instruments according to my invention have over gas regulators previously in
use for a like purpose.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the sanie is to be performed I declare that what I
claim is :-
1. In a gas regulator serving to maintain a constant steam pressure in a boiler-
heated by a gas flame, the combination with a steam pressure gauge of a
cylindrical valve operated by the said gauge; a cylindrical shell surrounding the

page_text: valve and capable of being turned independently of the valve; ports or passages.
in the valve and in the shell; an index or pointer moving with the shell; and a
scale indicating the position of the shell and hence the steam pressure at which the
gas is turned off substantially as described.
2. The improved gas regulator substantially as described and illustrated by the
annexed drawings.