Improvements in Screw-down Valves and Taps.
Year: 1889

page_text: Date of Application, 27th Feb., 1889
Complete Specification Left 23rd Nov, 1889-Accented, 28th Dec. 1889
PROVISIONAL SPECIFICATION.
Improvements in Screw-down Valves and Taps.
I, ROBERT BRADLEY of 81 Ashton New Road Bradford Manchester in the County
of Lancaster, Boot Maker.
.
My invention refers particularly to what are known as screw-down valves or taps,
the object of my improvements being to save the wear on the washer upon which the
valve face rests when the valve is closed..
In carrying my improvements into effect I fit or fix in the body of the screw-down
valve or tap a hollow stem or tube the open end of which is in communication with
the supply pipe; on the valve seating near the bottom of the tube is fitted a washer
of leather rubber or other suitable material; and above this washer preferably
through the side of the tube is a hole or opening which connects the interior of the
tube to the outlet passage of the valve or tap. The valve spindle is formed with a
hollow boss which fits over the closed end of the tube and rests when screwed down
upon the washer thus closing the valve. When the spindle is raised water flows
from the supply pipe into the tube and passes away through the hole in its side.
This improved valve can be applied to control the passage of steam air or
other fluids.
COMPLETE SPECIFICATION.
Improvements in Screw-down Valves and Taps.
I, ROBERT BRADLEY, of 81 Ashton New Road, Bradford, Manchester, in the
County of Lancaster, Boot Maker, 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
My invention refers particularly to what are known as screw-down valves or taps,
the object of my improvements being to save the wear on the washer upon which the
valve face rests when the valve is closed.
In carrying my improvements into effect I fit or fix in the body of the screw-
down valve or tap a hollow stem or tube the open end of which is in communication
with the supply pipe; on the valve seating near the bottom of the tube is fitted a
washer of leather rubber or other suitable material; and above this washer preferably
through the side of the tube is a hole or opening which connects the interior of the
tube to the outlet passage of the valve or tap. The valve spindle is formed with a
hollow boss which fits over the closed end of the tube and rests when screwed down
upon the washer thus closing the valve. When the spindle is raised water flows
from the supply pipe into the tube and passes away through the hole in its side.
This improved valve can be applied to control the passage of steam air or
other fluids.
And in order that my invention may be fully understood and readily carried into
effect I will describe the accompanying Sheet of Drawings reference being had to the
figures and letters marked thereon.
Figure 1 is an elevation and Fig. 2 a sectional elevation of a screw down valve to
which my improvements have been applied and Fig. 3 is a sectional plan of the lower
part of the valve casing.
The valve casing is here shown made in two parts the upper part a being screwed
to the lower part a'. The lower end of the screw-down spindle b is recessed at 6¹
and into this recess is fitted the end of a hollow boss or cap c which is connected to

page_text: the spindle 6 by say three screws d passing through the side of the recess 6¹ and into
a groove in the stem of the cap c. The lower part al of the valve casing is formed
with a tubular projection all the interior of which is in communication with the
inlet e. There is a hole or opening all in the side of the tubular projection a"
through which when the valve is open fluid can flow to the outlet f. The cap c which
forms the valve has its seating on a ring or washer g of leather india rubber or other
suitable material.
When the cap c is raised by turning the spindle 6 fluid flows from the inlet e
through the hole a in the tubular projection a" and away through the outlet f.
The advantage of connecting the cape to the spindle 6 by screws d projecting into a
groove in the stem of the cap is that the spindle can be turned to raise the cap c
without moving the latter axially until it has freed itself from the washer
similarly after the valve has been closed the continued movement of the spindle b
will not turn the cape round but simply press it more tightly down upon its seating
whereby very little wear and tear of the washer g takes place.
and
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 :-
The combination of the tubular projection a¹ in communication with the inlet and
provided with an opening all the hollow boss or cap c attached to the spindle b and
the valve seating g all substantially as and for the purposes specified.
Dated this 22nd day of November 1889.
H. B. BARLOW,
17, St. Ann's Square, Manchester, Agent for Applicant.
H. B. BARLOW,
17, St. Ann's Square, Manchester, Agent for Applicant.