An Improved Gas Regulator.
Year: 1891

page_text: Date of Application, 12th Feb., 1891-Accepted, 18th Apr., 1891
An Improved Gas Regulator.
We, THOMAS THORP, of Whitefield, in the County of Lancaster, Engineer,
and THOMAS GARDINER MARSH, of Lytham, also in the said County, Gas
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 :-
"
gas
The object of this invention is the construction of frictionless "quantity
regulators suitable for regenerative and kindred gas lamps and stoves where a
constant flow of gas to the burners, under varying conditions of pressure in the
mains, is required.
In order that our invention may be fully understood and readily carried into
effect we will proceed to describe the accompanying sheet of drawings reference
being had to the letters thereon marked.
The drawing is a sectional elevation of a regulator constructed substantially in
accordance with this invention.
A. is the lower part of the regulator casing having the gas inlet a at the side or
in any other convenient position and through which the screw B having a milled
head bis fitted. The screw B opens out into a disc-shaped piece which is
perforated. This perforated disc is provided with a rim c into which a diaphragm C
of leather or its equivalent is secured at its outer edge by means of an inner
rim d.
On the upper side and in the centre of the diaphragm a projecting piece of metal
or its equivalent d' of such a weight that a pressure of about two-tenths of an inch
of water is required to raise the diaphragm with attached projection d'.
D is the upper part of the regulator casing having the gas outlet ate or in any
other convenient position. f is a rim with which the upper part of the casing is
provided & is slightly smaller in diameter than the internal diameter of the rim d,
between which and the rim f the gas passes on its way through the apparatus ;
is an orifice into which the projection d enters when raised by the pressure of
the gas.
g
When the apparatus is in action and the gas is passing at any required rate
between the limits the particular regulator is intended to be used, any increase of
pressure tends to raise the diaphragm and to force the projection d' into the orifice
and so lessen the quantity passing; but as this extra pressure together with the
pressure due to the tending decrease of flow are acting on the upper surface of
the diaphragm also, there is very little tendency to a reduction in the flow, such
remaining tendency being altogether eliminated by the form of the projection
combined with the increasing pressure necessary to raise the diaphragm.
In order to adjust the apparatus to pass any required quantity between certain
limits which may be as much as fifty per cent. on either side of the mean, the
diaphragm is raised or lowered in situ by turning the milled head & the same action
also closing or opening the annular space between the rims d and f, thus increasing
or decreasing the quantity at will.
Having now particularly ascertained and described the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
AT

page_text: An improved gas regulator constructed substantially as shown on the accompanying
drawing & herein described.
Dated this 10th day of February 1891
THOMAS THORP,
THOMAS GARDINER MARSH,
Applicants.