Improvements in Steam and other like Pressure Gauges.
Year: 1892

page_text: Date of Application, 18th Mar., 1892
Complete Specification Left. 18th Nov., 1892-Accepted, 7th Jan., 1893
PROVISIONAL SPECIFICATION.
Improvements in Steam and other like Pressure Gauges.
I, JAMES BURDEN of Vaughton Street South, in the City of Birmingham
Steam Gauge Manufacturer do hereby declare the nature of this invention to be as
follows:-
This invention pertains to that class of pressure gauges of the "Bourdon ".type,
in which the straightening out or change of figure of a curved and flattened tube,
determines and indicates given pressure, by the free end of the same, or adjuncts
carried by the free end, operating a link or links or wheel work connected with a
oranked axis, which carries a finger or pointer.
The other and fast end has a pummel, or tube holder, from the underside of
which, a screwed gauge stem, passing through the lower part of the gauge case
directs itself, and takes and screws into the open top of a steam pipe.
The attachment of the said pummel or tube holder, is secured in position, and to
the outer casing, by small screws.
When in use on traction and other engines, were there is great vibration these
gauges become deteriorated, and the box deflection tube loosened from its casing,
by the constant rocking or vibration to which the gauges is subjected.
The object of my invention is to remedy this defect or these defects, by
connecting the outer casing directly to the steam pipe, independent of the steam
box of the tube, and also independent of the screwed gauge stem, which as before
described, takes into the top of the steam pipe, and makes the connection of the
gauge with the said pipe.
In carrying out my invention, I proceed as follows:-
I form at the lower underside of the edge of the drum shaped casing, a hollow or
tubular boss neck or stem, (which may be cast in one piece with the casing or
otherwise) screwed upon its outside, and having a hole up its middle of a bore
equal to the outside diameter of the gauge stem, which forms the entrance to the
steam box of the inflexion tube, and which gauge stem is outside screwed at its
lower end, upon which a nut takes, and screws up to the underside of the casing
stem, which is screwed on its outside, and takes within a sleeved and hollow nut,
whose lower and shanked part, which is screwed on the outside, takes into the
upper end of the steam pipe, hence the connection of the gauge through the
casing stem to the steam pipe, by a shanked and interposed hollow nut or its
equivalent.
By connecting gauges to the steam pipes in manner as described, any rocking or
vibration of them, has no tendency to disconnect the parts, as there are no small
Bcrews to become loosened, and from, as it were fulcrums, upon which the gauge
might be allowed to oscillate as centres of motion, and further, the method of con-
nection is simply in construction, efficient in its action, and not liable to become
deranged.
As a further form of my invention, the depending neck of the casing may be
terminated by a flange, and so also may the termination of the steam pipe, and
through which flanges screw pins pass, and on the same being screwed home, the
two parts are closely drawn together, hence the connection of the gauge to the
steam pipe, by a flanged neck, made integral with, or attached to the casing.
Dated this 15th day of March 1892.

page_text: COMPLETE SPECIFICATION.
Improvements in Steam and other like Pressure Gauges.
I JAMES BURDEN, of Vaughton Street South, in the City of Birmingham,
Steam Gauge 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 pertains primarily to the class of steam and other pressure gauges
of the "Bourdon" type, and has for its object, the prevention of the loosening of
the connections of the said gauge, consequent upon vibration, created through the
varying pressures, when the same is in use.
By my invention the enclosing or carrying casing of the gauge is directly
connected to the steam pipe, instead of the steam pipe being connected directly to
the deflection tube, as heretofore practised.
Thus according to my invention, the attachment part of the deflection tube is
connected to the casing, whilst the casing itself is directly connected to the steam
or other feed pipe of a pressure gauge.
Figure 1 of the accompanying drawing represents a steam pressure gauge, having
a connection made according to one form of my invention.
Figure 2 represents a complete vertical section of the same, showing how the
connection of the gauge is made integral with its casing, and how the said casing is
attachedly connected, in a direct manner, to the steam pipe, hence the leaving of
the deflection tube attachments free of the said steam pipe.
Figure 3 represents the gauge and its cognate parts shown separated from the
steam pipe, whilst Figure 4 shows the upper and connection end of the steam pipe.
Figure 5 is an underside plan of Figure 3.
Figure 6 represents a further form of gauge connection constructed also according
to my invention.
•
In Figures 1 to 5, a is the gauge casing, and 6 is the screwed neck, boss or
connection, made integral or in one piece with the casing a, and having up its
middle an axial hole b³, down which, or through which, the shank c, of a hollow
stem o, depending from the underside of the bracket foot c³, of the inflexion tube o,
takes, and which shank at its lower end, is outside screwed at c, and is affixed by a
nut, taking thereon, and with its inner face, abutting against the underside b³, of
the neck b.
d is the steam pipe and d is an inside screwed nut end, taking upon the outside
screwed shank part of the neck or boss b, of the casing a.
From the foregoing description, it will be seen that the gauge part of the
instrument has independent connection of the steam pipe, and its connection is made
to the casing, and the casing to the steam pipe, through the casing neck or boss,
located on the middle of its underside. Vibration or oscillation imparted to the
steam pipe by the varying pressures of the steam, occasions no loosening of the
parts, or no loosening of the inflexion tube connection.
In Figure 6, a is the casing, with a hollow neck b, having a flange b³, at its lower
end, which is connected to a steam pipe flange d³, of a steam pipe d. The gauge
part of the instrument is the same as in the preceding figures.
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 :-
First-In Bourdon-principle steam and other like pressure gauges, connecting
the same to their steam or supply pipes directly by, or through, the said gauge
casing, substantially as described and set forth.
Secondly-In Bourdon-principle steam and other like pressure gauges, connecting

page_text: the same to their steam or supply pipes, directly by screwed necked bosses or the
like, carried by the gauge casings, substantially as described and set forth.
Thirdly: The improvements in Bourdon-type steam and other like pressure
gauge connections, substantially as described and set forth in Figures 1 to 5.
Fourthly-In Bourdon-principle and like pressure gauges, connecting the same
to the steam or other like supply pipes, by necked flanges upon the casing, of the
one part, being connected to the flange ends of the other part, substantially as
described and set forth in Figure 6.
...נ..ת
TAL
1000
பக்க வ
MAAT TAATTA
JAMES BURDEN,
By Henry Skerrett,
6, Livery Street, Birmingham, Agent for Applicant,