IMPROVE- MENTS IN PLUG TAPS
Year: 1884

page_text: I ARTHUR WALTER DEATH of 13 Aylestone Road Leicester in the County of
Leicester Engineer do hereby declare the nature of sáid Invention for "IMPROVE-
MENTS IN PLUG TAPS" to be as follows:-
This Invention relates to solid ended Plug Taps for all purposes where applicable
and has for its object the increasing the durability and efficiency of that class of
Taps whilst retaining a practically direct thoroughfare through the same. The
essential feature of my invention consists in making the passage through the plug
in a diagonal direction so that when the. plug turned half way round the passage
will be blocked.on both the inlet and outlet sides whereby I obtain double the.
amount of wearing. face and a more direct passage than is now obtained in the.
hollow plug taps and about four times the wearing face of the ordinary solid ended
plug taps. As the inlet and outlet passages in my improved tap are not opposite
each other the chance of leakage by the eating away or cutting round of the tap
body and plug against the passages is obviated. With a view to the obtainment
of a practically direct passage through the Tap I prefer to place the hereinbefore.
described solid ended plug diagonally to the inlet and outlet passages in the tap.
body. In some cases where found desirable with a view to still further reducing i
the risk of leakage I make an annular groove or recess round the plug between
the inlet and outlet passages in conjunction, or not with other annular grooves or/
recesses above and below the said inlet and outlet passages which groove or grooves.
I pack with any convenient packing capable of ready renewal when necessary on!
the withdrawal of the plug.

page_text: COMPLETE SPECIFICATION.
I ARTHUR WALTER DEATH of 13 Aylestone Road, Leicester in the County of
Leicester, Engineer, do hereby declare the nature of my invention for "IMPROVE-
MENTS IN PLUG TAPS " and in what manner the same is to be performed to be
particularly described and ascertained in and by the following statement:-
This Invention relates to taps with solid or closed ended plugs for all purposes
where applicable and has for its object the increasing the durability and efficiency
of that class of Taps whilst retaining a practically direct thoroughfare through the
same. The essential feature of my invention consists in making the passage
through the solid or closed ended plug in a diagonal direction that is to say with
its inlet and outlet sides in two separate.planes at right angles to the axis of the
plug whether such axis be inclined or at right angles to the inlet, and outlet
branches of the tap body so that when the plug is turned a half revolution the
said diagonal passage will be blocked on both the inlet and outlet sides whereby I
obtain double the amount of wearing face and a more direct passage than is now
obtained in hollow plug taps and about four times the wearing face of the ordinary
taps with "solid ended plugs." As the inlet and outlet sides of the passage in the
plug óf my improved tap are not opposite each other the chance of leakage by
the eating away. or cutting round of the tap body against the orifices of the
passage is almost entirely obviated. With a view to the obtainment of a practically
direct passage through the tap I. prefer to place the herein before .described solid
ended plug diagonally or at an angle less than a right angle to the inlet and outlet
branches of the tap body. In some cases where found desirable with a view to still
further reducing the risk of leakage I interpose a ring of packing of any suitable
material between the inlet and outlet sides of the passage in conjunction or not
with other rings of packing situate respectively below the inlet and above the
outlet sides which packings are contained in a groove or grooves formed round the
plug of the tap and are easily renewed when necessary on the withdrawal of
the plug.
Figures 1, 2 and 3 of the accompanying drawings represent in vertical section
various forms of my improved tap and figures 4 and 5 show its application to
water gauges. In all these figures (which are drawn full size) like parts are
indicated by similar letters of reference.
a is the body of the tap-b the solid ended plug-c the diagonal passage
therein and d and e the inlet and outlet of, such passage, the inlet being by
preference near the lower or smaller end of the plug. The straight dotted lines w, x
and y, z in figures 12 and 3 show the two planes perpendicular to the axis
of the, plug in which the inlet and outlet sides of the diagonal passage are situate.
In the taps shown in figures 1, 2, and 3 I prefer to make the inlet ths of an inch
square and the outlet gths of an inch by 18ths of an inch as shown in order to give
a full-way passage.
Figure 1 sbows my improvements as adapted to a screw bottom tap the curved
dotted lines therein indicating its adaptability to a bib or range tap. In this
figure I have also shown three packing grooves f formed round the plug between
the inlet and outlet and below and above the same respectively for the reception of
packing.

page_text: Figure 2 shows my improvements as applied to a solid bottom tap body provided
with stuffing box and gland g the packing grooves of being here omitted. The
curved dotted lines in this figure show the diagonal passage in its closed or
reversed position. In both these figures the plug is shown as placed at an angle or
inclination to the inlet and outlet branches of the tap body to afford a more direct
course for steam or liquids but in the solid bottom plug tap shown at figure 3 the
body of the tap is set at right angles to the inlet and outlet branches whilst still.
retaining the diagonal arrangement of the passage in the plug. Although this
last mentioned modification will not afford so direct a thoroughfare as when the
plug and body of the tap are at less than a right angle to the inlet and outlet
branches (see figures 1 and 2) it is more in accordance externally with present
shapes.
Figure 4 is a sectional plan taken along the line 1-2 in figure 5 of one of the
connecting branches of a water gauge and figure 5 is a longitudinal section in the
direction of the gauge tube taken along the line 3-4 in figure 4 my diagonal
passage tap being applied in both figures.
I am aware that Taps of the "hollow plug" kind have been made with the tap
body and plug set at an angle or inclination to the inlet and outlet branches on
the tap body and I propose to make my within described "solid ended plug? tap
at an inclination when so required as is shown in figs. 1, 2, 4, and 5 but I do not
claim this setting at an angle as part of my invention.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is
1. In taps having solid or closed ended plugs making the passage through the
plug in a diagonal direction or so that the inlet and outlet sides of the passage
shall be situate in different planes at right angles to the axis of the plug as
specified.
2. The combination with a solid or closed ended tap plug having its passage
made diagonally therein, of a ring of packing interposed between the inlet and
outlet sides of the said passage in conjunction or not with other rings of packing
embracing the plug and situate respectively below and above the inlet and outlet
sides of the passage as specified.