Improvements in the Construction of Pressure Gauges.
Year: 1890

page_text: Date of Application, 5th July, 1890
Complete Specification Left, 4th Apr., 1891-Accepted, 9th May, 1891
PROVISIONAL SPECIFICATION.
Improvements in the Construction of Pressure Gauges.
I, WILLIAM CLIFFORD of Norton Woodseats, in the County of Derby,
Engineer do hereby declare the nature of my invention to be as follows :-
First, it relates to the construction of the base or lower part of pressure gauges;
second, to the method of connecting the gas pipes with the glass tubes of such
gauges; third, to the combination of the scale with the frame or mounting of such
gauges.
In the first part of my invention I propose to make the base, or "shoe in
several parts, the division between the two main parts passing horizontally through
the channel of communication connecting the bases of the columns of the gauge.
I internally make upon, or attach to one of the parts of the base or shoe,
projections or glands, having upward annular projections. The other part (usually
the upper one) has two holes for the glass tubes to pass through, and at a short
distance inside these holes are enlarged so as to form ledges, or stuffing boxes within
them.
Into these stuffing boxes round the bottom end of the glasses, I place from the
lower side, elastic packing rings to form the joint between the tubes and the shoe.
When the several parts are placed together the annular projections enter the
stuffing boxes, and by means of a screw passing through each side of the shoe, the
parts are drawn together, and watertight and gastight joints are made.
I cut away one side of one or both screw holes in the lower part of the shoe, to
allow of the removal of such lower portion by simply slackening the screws.
To effect the second part of this invention, I make at the upper end of the gauge,
a tube screwed on its external surface, and that will pass easily into the glass tube.
Upon this tube I put two nuts, the upper one of larger diameter than the glass
tube, and if desirable it may form part of the union to connect the gas supply pipe,
the other nut will pass into the glass tube.
Between the two nuts I place an elastic packing ring, and by screwing the nuts
towards each other the packing ring is squeezed out to the required size to fill the
tube.
In the third part of the invention, I make the scale, and the frame or mounting
of the gauge in one piece; that is, instead of attaching a separate scale to the
mount, construct a mount or framework with the scale lines and figures marked
upon it, thus reducing the number of parts.
Dated tho 1th dov of Tul. 1800
ROBT. F. DRURY, Fel. Iust. 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, 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:—
"
First, it relates to the construction of the base or lower part of pressure gauges :
second to the method of connecting the gas pipes with glass tubes of such gauges ;
third to the combination of the scale with the mounting or frame of such
CANCAQ

page_text: In the first part of my invention I propose to make the base or "shoe" in several
parts, the division between the two main parts passing horizontally through or
above the channel of communication connecting the bases of the columns of the
gauge.
I internally make upon, or attach to, one of the parts of the base or "shoe,"
projections or glands. The other part (usually the upper one) has two holes for
the glass tubes to pass through, and to a short distance inside the holes are enlarged
so as to form ledges or stuffing boxes within them.
Into these stuffing boxes round the bottom ends of the glasses I place from the
lower side, elastic packing rings to form the joints between the tubes and the shoe.
When the several parts are placed together the annular projections enter the
stuffing boxes, and by means of a screw passing through each side (or one in the
middle only) of the shoe, the parts are drawn together and watertight joints are
made.
I cut away the side of one or both screw holes in the lower part of the shoe, to
allow of the removal of such lower portion by simply slackening the screws.
To effect the second part of my invention, I make at the upper end of the gauge,
a tube screwed on its external surface, and that will pass easily into the glass tube.
Upon this tube I put two round nuts, the upper one of larger diameter than the
glass tube, the other nut will pass into the glass tube. Between the two nuts I
place an elastic packing ring, and by screwing the nuts towards each other the
packing ring is squeezed out to the required size to fill the tube.
In the third part of my invention, I make the scale and the frame or mounting
of the gauge in one piece; that is instead of attaching a separate scale to the mount,
or to the tubes; I construct a mount or framework with scale lines and figures
marked upon it, thus reducing the numbers of parts.
In order that my invention may be more clearly understood, I have marked upon
the annexed drawings, letters of reference showing the several parts of the invention
hereinbefore described.
In Fig 1, the letters C and D show the two main parts of the divided shoe, and
the projections or glands appear upon the upper parts of C.
The dotted
line A-B, is the line of division. E, is the elastic packing ring squeezed into the
stuffing boxes and against the glasses, G, by drawing the parts C, and D, together
by means of the screws F.
H, in Fig 2, shows the part of screw hole cut away to allow of the separation of
the two parts of shoe without entirely withdrawing the screws.
In Fig 1, J, is the externally screwed tube, which may be either straight or bent.
K, is the upper round nut and L, the lower one, and M, the elastic packing ring
squeezed outwardly as these nuts are screwed towards each other.
The margin or extended parts of scale O, are shown attached to the compound
shoe C and D, and the double thimble P, by suitable fastenings at N.
Having now particularly described the nature of my invention, and the manner
of performing or carrying the same into practice; I declare that what I claim is :-
First, the dividing of the shoe or lower fitting in a pressure gauge horizontally
into two parts, and the forming of the gastight and watertight joints, round the
glass tubes between such two parts in the manner described and shown.
Second, the making of the scale and mount or frame of pressure gauges in one
piece, instead of two separate pieces.
Dated the 3rd day of April 1691.
ROBT. F. DRURY, Fel. Inst. P.A.,
Bank Buildings, George Street, Sheffield, Agent for Applicant.