Improvements in the Construction of Pressure Gauges.
Year: 1890

page_text: Date of Application, 15th Jan., 1890
Complete Specification Left, 26th Mar., 1890-Accepted, 26th Apr., 1890
PROVISIONAL SPECIFICATION.
Improvements in the Construction of Pressure Gauges.
I WILLIAM CLIFFORD of Norton Woodseats in the County of Derby, Mining
Engineer do hereby declare the nature of this invention to be as follows:-
These improvements relate in the first place to the general form and arrangement
of the gauge, and in the second place, to the fittings used for attaching the pipes
which communicate with the atmosphere, and with the elastic fluid to be measured, to
the gauge.
In the first part of my invention I dispense with the usual glass tubes and metal
mountings with glands and other parts, and I make a double trough of metal or other
material having a communication through the division wall, and at the opposite end,
I make a hole through the end plate into each trough, one being for the insertion of
the tube or bend attached to pipe conveying gas to be measured; the other for a
similar bend open to the atmosphere.
I cover both troughs with a face of glass or other transparent material, securely
fastened round the edges, and marked with gradations of a scale for measuring
pressure.
To prepare the gauge for use, the end with the two holes is placed uppermost, and
water poured into one of them until it reaches the proper level. The tubes or bends
are inserted into the holes in end of troughs and the gas pipe attached to one of
them; the excess of pressure in one compartment of the trough forces the water
through the hole in the division wall, and raises it in the other compartment, the
extent of rise being shown
upon the scale.
The sides and back may have transparent panels, and instead of the scale being
marked upon the glass front, it may be shown upon the other inside faces.
The second part of my invention is effected by the use of short metal tubes with
flanges at their upper ends to which are attached the bends for the gas pipe, and the
pipe communicating with the atmosphere.
The lower part of the short tubes which pass into the troughs (whether metal or
glass) are grooved or roughed to hold firmly inside the elastic packing ring used for
making the joint.
Tinted th. 14h 1
2
1000
ROBT. F. DRURY, Fel. Inst. P.A.,
Bank Buildings, George Street, Sheffield, Agent for Applicant.
COMPLETE SPECIFICATION.
Improvements in the Construction of Pressure Gauges.
I, WILLIAM CLIFFORD, of Norton Woodseats in the County of Derby, Mining
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 :-
.."
These improvements relate in the first place to the general form and arrangement
of the gauge; and in the second place to the fittings used for attaching the pipes
which communicate with the atmosphere, and with the elastic fluid to be measured, to
the gauge.
The annexed sheet of drawings illustrates my invention, and like letters indicate likø
parts in any of the Figures.

page_text: Fig. 3, section through body of gauge.
Fig. 4, similar section through body of gauge fitted with side panels.
Fig. 5, elevation of gauge, with single cover, part of base being shown in section.
Fig. 6, section of gauge, as Fig. 5, with single cover, taken through the body.
In the first part of my invention I dispense with the usual glass tubes, and metal
mountings with glands, and other parts used with such tubes, and I construct a
double trough of metal or other material Fig: 1, S, S; are the side walls, and central
division wall, B the base, E the top part, Copening in division wall,.through which
the compartments communicate.
At the top end I make a hole through the end plate into each compartment or
trough, one being for the insertion of the tube, or bend attached to the pipe conveying
gas to be measured, and which for example is marked G¹, the other G2 a like tube or
bend open to the atmosphere.
I cover both troughs with a face of glass or other transparent material D, securely
fastened round the edges, seen in Fig. 3, the said cover may extend over both troughs
as in Fig. 6, or each trough may have its separate cover, and if desirable, a transparent
panel may be placed in each side, see Fig. 4, and also in the back.
I mark upon such cover or covers the figures and graduations of the scale or scales
as shown in Figs. 1 and 5, used for measuring pressures.
These covers with the bodies of the troughs form watertight compartments, com-
municating only through the opening C in the division wall, said opening being
preferably made beyond or lower than the cover as shown in Fig. 5.
Water or other liquid is poured through one of the holes in the top plate, (or
through a special opening provided with a funnel and tap) until it reaches the proper
level, the tubes or bends G¹ and G³, are then inserted as shown in Fig. 1, and the gas
pipe attached to either of them.
These tubes (or bends) are provided with flanges G, and the lower end of the tubes
are roughened, ringed, or otherwise prepared to retain the packing rings H, which
also fit into the holes in the part E.
The modified form of gauge shown in Figs. 5 & 6 has two troughs A separated by
a flat plate P, in front of which the scale D is placed, leaving the troughs clear; the
lower part of Fig. 5, is cut away to show the opening C, communicating between
the two covered troughs A. M are plugs which may be removed for cleaning
purposes.
Having now particularly described and ascertained the nature of my inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
1-In pressure gauges, constructing the body of two combined troughs of metal, or
of other material, covered with glass or other transparent substance, and with or
without transparent panels and having the scales or divisions marked upon such
transparent parts, substantially as described and shown.
2-In pressure gauges, the inlet and outlet tubes G¹ and G², provided with collars
or flanges G, and having their lower ends roughened, or otherwise prepared to hold
the packing rings H, substantially as described and shown.
Dated the 9th day of March 1690.
a the Ith day of March 1.
ROBT. F. DRURY, Fel. Inst. P.A.,
Bank Buildings, George Street, Sheffield, Agent for Applicant.