Improvements in Taps or Stop Cocks for Liquids, Steam, and Gas.
Year: 1892

page_text: Date of Application, 7th July, 1892
Complete Specification Left, 16th Mar., 1893-Accepted. 27th May. 1893
PROVISIONAL SPECIFICATION.
Improvements in Taps or Stop Cocks for Liquids, Steam, and Gas.
We, EVERED AND COMPY. LIMITED of Surrey Works, Smethwick in the
County of Stafford, Manufacturers, and Tом DIGHT GADD of No. 12 Holly
Street, Smethwick, aforesaid, Sub-manager of Works do hereby declare the nature
of this invention to be as follows:-
The said invention consists of a tap or stop cock the parts of which are
constructed and combined in the manner hereinafter described.
We will describe the said invention in connection with a tap for liquids.
The ingress and egress passages and the body of the tap are cast in one piece,
the ingress passage opening at a lower level in the body than the egress passage.
In the body and at a level between the levels of the said two passages is a con-
traction which contraction constitutes a valve seat. The upper contracted part
of the body has an internal screw thread and the lower part of the body which is
of larger diameter than the valve seat also has an internal screw thread. The
valve spindle is in two parts the upper part having a screw thread suitable to
engage in the screw thread in the concave screw in the top of the body. The
lower part of the valve spindle is connected to the bottom of the upper part of
the spindle by a connection which transmits the rotary motion of the upper part
to the lower part of the spindle while allowing a vertical and lateral play in the
said lower part. The valve proper is situated at about the middle of the said
lower part of the spindle. The valve spindle is introduced at the bottom of the
body and its upper screwed part made to engage in the concave screw thread in
the upper part of the body. On the extreme upper end, the handle or key is fixed.
The lower part of the body is closed by a screw nut in the axis of which is a
cylindrical hole for the reception and guiding of that part of the valve stem which
is situated below the valve proper.
The action of the parts is as follows. When the key or handle is turned in the
direction proper to raise the valve to its valve seat, the communication between
the ingress and egress passages is closed the pressure of the liquid on the underside
of the valve tending to keep the valve to its seat. When the key or handle is
turned in the opposite direction the valve is depressed from its seat and communi-
cation between the ingress and egress passages is established and liquid passes
through the tap.
As the ascending and descending motions of the valve are accompanied by a
rotary motion the closing and opening of the tap effects a slight grinding action
of the valve on its seat and the perfect tightness of the tap is thereby secured.
The pressure of the water is transmitted to the bottom of the valve stem through
small holes; or by the said part not fitting tightly in its guide.
Dated the 7th day of July 1892.
W. T. WHITEMAN,
Agent for the Applicants.

page_text: COMPLETE SPECIFICATION.
Improvements in Taps or Stop Cocks for Liquids, Steam, and Gas.
We EVERED AND COMPANY LIMITED of Surrey Works Smethwick in the
County of Stafford Manufacturers, and Toм DIGHT GADD, of No. 12 Holly
Street, Smethwick aforesaid, Sub-manager of Works do hereby declare the nature
of the said invention and in what manner the same is to be performed to be
particularly described and ascertained in and by the following statement :-
The said invention consists of a tap or stopcock the parts of which are constructed
and combined in the manner hereinafter described.
We will describe the said invention in connection with a tap for liquids.
The ingress and egress passages and the body of the tap are cast in one piece,
the ingress passage opening at a lower level in the body than the egress passage.
In the body and at a level between the levels of the said two passages is a
contraction which contraction constitutes a valve seat. The body of the tap has
an internal screw. The valve spindle is in two parts, the upper part having a
screw thread suitable to engage in the screw thread in the concave or internal
screw thread in the body. The lower part of the valve spindle is connected to the
bottom of the upper part of the spindle by a connection which transmits the rotary
motion of the upper part to the lower part of the spindle while allowing a vertical
and lateral play in the said lower part. The valve proper is situated at about the
middle of the said lower part of the spindle. The valve spindle is introduced at
the bottom of the body and its screwed part made to engage in the concave or
internal screw thread in the body. On the extreme upper end the handle or key
is fixed. The lower part of the body is closed by a screw nut in the axis of which
is a cylindrical hole for the reception and guiding of that part of the valve stem
which is situated below the valve proper.
The action of the parts is as follows. When the key or handle is turned in the
direction proper to raise the valve to its valve seat, the communication between
the ingress and egress passages is closed the pressure of the liquid on the underside
of the valve tending to keep the valve to its seat. When the key or handle is
turned in the opposite direction the valve is depressed from its seat and
communication between the ingress and egress passages is established and liquid
passes through the tap.
As the ascending and descending motions of the valve are accompanied by a
rotary motion the closing and opening of the tap effects a slight grinding action of
the valve on its seat and the perfect tightness of the tap is thereby secured.
The pressure of the water is transmitted to the bottom of the valve stem through
small holes, or by the said part not fitting tightly in its guide.
Figure 1 of the accompanying drawing represents in side elevation; Figure 2 in
longitudinal vertical section and Figure 3 in transverse vertical section, a tap or
stopcock for liquids, the parts of the said tap or stopcock being constructed and
arranged according to this invention; Figure 4 represents in horizontal section
parts of the tap taken through the connection of the two parts of the valve
spindle.
The same letters of reference indicate the same parts in Figures 1, 2, 3
and 4.
a is the body of the tap or stopcock; 6 is the ingress pipe or passage and c the
egress pipe or passage, the said ingress pipe opening into the body a at a lower
level than the egress pipe as represented in Figure 2. Between the two pipes b
and c is a contraction or partition constituting the valve seat d. The upper part
of the body a is screwed with an internal screw; e, fare the two parts of the valve
spindle, the upper screwed part e having an external screw thread suitable to
The lower part f
engage in the concave or internal screw thread in the body a.
of the valve spindle consists of an angular stem carrying the valve g, the upper
part of the said stem f being fitted in and capable of a vertical sliding motion in

page_text: the slot in the screwed upper part of the valve spindle, and also of a slight lateral
play in the said slot h. The connection of the lower or loose valve part f, g with
the screwed upper part e is effected by the cross pin i passed through the valve
spindle e and taking into a slot k in the top of the stem f of the loose valve, so that
the rotary motion of the screwed upper part is transmitted to the lower or loose
valve part, and the rising and falling and lateral motions of the said lower or loose
valve part permitted. The valve g is situated below the partition or valve seat d
and the pressure of the liquid entering the tap at the ingress pipe braises the valve
to and maintains it against the underside of the said seat. The lower part of the
body of the tap is closed by the screw nut in- the axis of which is a hole for
receiving and guiding the part of the stem beneath the valve g. By means of the
said guide the displacement of the valve spindle is prevented. The lifting of the
valve is assisted by the coiled spring m on which the lower part of the stem is
seated. The pressure of the water in the ingress pipe is transmitted to the
bottom of the valve stem through the small passages or holes n, n; or the same
result may be obtained by making the lower part of the stem fit loosely in the guide
in the screw nut 1. The valve spindle with its parts connected together by the
cross pin and slot k, is introduced at the bottom of the body, the screw plug
being removed, the screwed upper part of the valve spindle being made to engage
in the concave or internal screw thread in the upper part of the body as represented
in the drawing. After the spindle has been fitted in its place, the bottom of the
body is closed by the screw nut 1. The top of the body is closed by the cap p
carrying the handle, crutch or key 7 screwed upon the extreme top of the spindle
and fixed in its place by a set screw. By turning the key or handle g in one or
other direction the cap p rises or falls upon the cylindrical outside of the body
of the tap and rotates the screwed part e of the spindle in the screw thread in
the body, the rotary motion of the screwed upper part of the spindle being
transmitted to the lower part or loose valve f, g by the connection described and
represented.
The action of the parts of the tap or stopcock is as follows:-When the key,
crutch or handle 9 is turned in the direction proper to raise the valve g to its
seat d, the communication between the ingress and egress pipes b and c is closed,
the pressure of the liquid on the underside of the valve g tending to keep the said
valve to its seat. When the key, crutch or handle is turned in the opposite
direction, the valve y is depressed from its seat and communication between the
ingress and egress pipes b and c is established and liquid passes through the tap.
As the ascending and decending motions of the loose valve, are accompanied by
a rotary motion, the closing and opening of the tap effects a slight grinding action
of the valve g on the underside of its seat d and the perfect tightness of the tap is
thereby secured.
Figure 5 represents in longitudinal vertical section another tap or stopcock for
liquids constructed according to this invention. In this tap the ingress pipe or
passage is situated at right angles to the egress pipe or passage c, the said ingress
passage being provided with a guider for the grinding of the valve stem.
b
b
The
ingress pipe is screwed to the body of the tap and is removed to introduce and
withdraw the valve and its spindle. In all other respects the parts of the tap
represented in Figure 5 are the same as corresponding parts of the tap first
described and like parts are marked with the same letters of reference.
We apply our improvements to taps or stopcocks for steam and gas substan-
tially as hereinbefore described and illustrated with respect to taps or stopcocks
for liquids.
Having now particularly described and ascertained the nature of the said inven-
tion and the manner in which the same is to be performed we declare that we
claim as the said invention of "Improvements in taps or stopcocks for liquids steam
and gas"-
The combination with the screwed body of the tap or stopcock of a rising and

page_text: falling and rotating spindle made in two parts, the lower or loose part carrying a
valve which is raised to and pressed against its seat by the pressure of the liquid
steam or gas entering the tap or stopcock, the combined valve and lower loose part
of the spindle being so connected to the screwed upper part that the ascending and
descending motions of the valve spindle are accompanied by a slight grinding
action of the said valve upon its seat, the several parts being arranged and
working substantially as hereinbefore described and illustrated in the accompanying
drawing.
Dated the 13th day of March 1893.
EVERED AND COMPANY, LIMITED,
Per pro Alfred H. Griffiths, Managing Director.
TOM DIGHT GADD.