Improved Pressure Gauge.
Year: 1893

page_text: Date of Application, 27th Feb., 1893
Complete Specification Left, 27th Nov., 1893-Accepted, 30th Dec., 1893
PROVISIONAL SPECIFICATION.
Improved Pressure Gauge.
We, FRANCIS HEANS ORME of the Firm of George Orme and Company,
Engineers, and JOSEPH WILLIAM COLLINS, Foreman, both of the Atlas Meter
Works, Oldham in the County of Lancaster do hereby declare the nature of this
invention to be as follows:-
Our invention relates to pressure gauges for testing the pressure in gas pipes
and for similar purposes and consists in an improved construction or arrangement of
said gauges, the object of our invention being to make such gauges compact and
convenient to carry and protect the glass tubes against breakage.
Our improved pressure gauge is constructed somewhat as follows: Two glass
tubes are fixed air and water tight at their lower ends in the top of a small
metal box or case through which they communicate with each other and at their
upper ends in the bottom of a similar box formed with a partition between them.
Between the two glass tubes a metal pipe is placed communicating at the top
with the upper box on one side of the partition, and passing through the lower
box, to which pipe is connected a gas cock formed at the lower end with a
tapered screwed part for fixing the gauge to the pipe the pressure in which is
to be ascertained. The top and bottom boxes are further connected by a
semicircularly bent plate or half tube passing round the glass tubes to their centre
line or approximately so. To the top box two perforated nipples are screwed
one above each glass tube and fitted with caps screwed thereto, one of which
nipples serves to fill the gauge with water and the other to allow the air to
escape from the open leg of the gauge. To the outer ends of the boxes circular
flanges or plates with projecting rims or their equivalents are fixed by means of
the parts screwed thereto or otherwise or formed thereon, between which flanges
an outer tube is placed passing over the boxes and half tube attached thereto,
part of which outer tube is cut away for the greater part of its length. This
tube can be turned round between the flanges and when in the position in which
its solid half coincides with the half tube connecting the boxes, the glass tubes
are exposed to view, while by turning the outer tube half way round, they are
covered up and protected from damage and the gauge can be carried about
without having to be placed in a case. Suitable stops are provided for deter-
mining these positions of the outer tube. Upon the central pipe of the gauge
a slide is arranged which can be fixed by means of a set screw and has a scale
attached to it.
In using the gauge water is filled in through one of the nipples into one of
the glass tubes, and passes through the bottom box to the other tube, the cap
on the nipple above this being partly unscrewed to allow the air to escape from
The gauge
it, after which the cap on the filling in nipple is screwed down.
having been fixed upon the pipe the pressure in which is to be ascertained, the
scale is adjusted so that its zero mark coincides with the water level.
the cock is opened the gas will ascend the central pipe into one part of the
upper box and pass into one of the glass tubes, depressing the water level therein
and raising it in the other and the pressure can be read on the scale in the
usual way.
1
L
Babe 1802
When
R. J. URQUHART,
57, Barton Arcade, Manchester, and 5, Clayton Square, Liverpool,
Consulting Engineer and Patent Agent.

page_text: COMPLETE SPECIFICATION.
Improved Pressure Gauge.
We, FRANCIS HEANS ORME of the Firm of George Orme and Company
Engineers, and JOSEPH WILLIAM COLLINS, Foreman, both of the Atlas Meter
Works, Oldham in the County of Lancaster 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 :-
Our invention relates to pressure gauges for testing the pressure in gas pipes and
for similar purposes and consists in an improved construction or arrangement of
said gauges, the object of our invention being to make such gauges compact and
convenient to carry and protect the glass tubes against breakage.
On the sheet of drawings appended hereunto
Fig. 1 shows a front view of our improved gauge,
Fig. 2 is a side view in section,
Fig. 3 a cross section on line xx, Figs. 1 and 2,
Fig. 4 a cross section on line y y, Fig. 2.
Our improved pressure gauge is constructed as follows: Two glass tubes a and a¹
are fixed air and watertight at their lower ends in the top of a small metal box or
chamber through which they communicate with each other, and at their upper
ends into a similar box c. This box is formed with two internal bosses d d', into
which the glass tubes a and a¹ are respectively fixed. Boss d is closed at the top
by a perforated nipple e screwed into it and closed by a cap e¹. Boss is likewise
closed by a perforated nipple and cap or plug f¹, and has a lateral hole d³ made
in it through which the chamber c communicates with the top of the glass tube a,
while the glass tube a' is shut off from it. Between the two chambers b and c a
metal pipe g is placed communicating at the top with the upper chamber and glass
tube a, and passing through the lower chamber b, which has a stem screwed up
to a shoulder 6' formed on it. Upon the stem b¹ a disc haud a cock i are screwed,
the cock being formed at the lower end with a tapered screwed part for fixing the
gauge to the pipe the pressure in which is to be ascertained. The top and bottom
boxes c and are further connected by a semicircularly bent plate or half tube /
passing round the glass tubes a to a little beyond their centre line.
Between the disc h and bottom of the chamber b, a disc m with rim m¹ is placed
so that it can turn on the shoulder and to it a tube n is fixed extending under the
rim c on the top plate of box c, part of which tube is cut away as shewn. When
the tube n is in the position shewn on the drawings the glass tubes are exposed to
view; but turning the tube half way round they will be carried up and protected
from damage, the tube forming a cover, and the gauge can be carried about without
having to be placed in a case. A peg is fixed in the bottom of the chamber b
and enters a slot in the disc m and acts as a stop to fix the position of the tubular
cover. Upon the central pipe 9 of the gauge a slide o is arranged which can be
fixed by means of a set screw of and has a scale p attached to it.
In using the gauge water is filled in through the nipple e into the glass tube a
and passes through the bottom box d into the other tube a', the cap f¹ being
screwed off or partly so to allow the air to escape from the tube a', after which the
cap is screwed down. The gauge having been fixed upon the pipe the pressure
in which is to be ascertained, the scale p is adjusted so that its zero mark coincides
with the water level. When the cock is opened, the gas ascends through the pipe g
into the box c and passes through the hole d' into the tube a depressing the water
level therein and raising it in the tube a', the cap f being unscrewed meanwhile :
The pressure can then be read off. If the gauge is to remain in position for
repeated readings, the tube n can be turned round and the gauge closed whereby
the glasses are protected against damage. Or when removed from its position, it

page_text: can likewise be closed and after the cap f has been screwed down, carried about
without risk of breakage.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is:
1. The general arrangement or combination of the parts of a pressure gauge
hereinbefore described and illustrated by the drawings.
2. In a pressure gauge for testing gas pressure and similar purposes, the arrange-
ment of a revolving tube or cover substantially as hereinbefore described and
illustrated.
Dated the 25th day of November 1893
R. J. URQUHART,
57, Barton Arcade, Manchester, and 5, Clayton Square, Liverpool,
Consulting Engineer and Patent Agent.