Year: 1889

page_text: Date of Application, 30th Jan., 1889
Complete Specification Left, 9th Apr., 1889
Complete Specification Accepted, 1st June, 1889
I, TOM DIGHT GADD of 27 Jewin Crescent in the City of London Foreman Brass
founder and finisher do hereby declare the nature of this invention to be as follows
According to this invention I construct a screw down valve tap with the valve and
its spindle in one moving part and in such manner that although when raised from its
seat it is free to turn, it can be pressed on to or withdrawn from its seat without being
turned thereon. I make the stem of the valve to pass out from the shell or body of
the tap through a stuffing box, and hold the stem down so as to hold the valve against
its seat by a cap, screwed on to a screw thread cut around the exterior of the stuffing
box or into a screw thread cut around the interior of a recess in the top of the
body above the stuffing box.
The inner face of the top of the cap may rest on a collar or shoulder on the valve
stem and the stem of the valve may project through the top of the cap and have a
screw screwed into its end to hold a washer down on to the exterior of the top of the
cap and in this manner allow of the cap being turned freely without at the same time
turning the valve stem but yet carrying the valve stem with it towards or away from
the valve seat. Or in place of the stem of the valve being made to pass through
the cap it might be made to pass up into a recess formed in it and the inner end of a
screw pin inserted through the side of the cap be made to enter a groove formed around
the exterior of the valve stem.
At the bottom of the stuffing box a hole is formed through the shell or body large
enough to permit of the valve being passed down through it.
Surrounding the stem of the valve is a loose ring the exterior of which fits the hole.
The sides of the hole and the ring are made conical or stepped to prevent the ring
from passing into the interior of the shell.
Above the ring is the packing and the packing is held down on to it by a nut screwed
down into the upper part of the stuffing box recess.
Dated this 30th day of January 1889.

page_text: I TOM DIGHT GADD of 27 Jewin Crescent in the City of London Foreman Brass
founder and finisher 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 :-
According to this invention I construct a screw down valve tap with the valve and its
spindle in one moving part, and in such manner that although when raised from its
seat, it is free to turn, it can be pressed on to or withdrawn from its seat without
being turned thereon. I make the stem of the valve to pass out from the shell or
body of the tap through a stuffing box, and hold the stem down, so as to hold the valve
against its seat by a cap, screwed on to a screw thread cut around the exterior of the
stuffing box, or into a screw thread cut around the interior of a recess in the top of
the body above the stuffing box.
The inner face of the top of the cap may rest on a collar or shoulder on the valve
stem, and the stem of the valve may project through the top of the cap and have a
screw, screwed in its end to hold a washer down on to the exterior of the top of the
cap, and in this manner allow of the cap being turned freely without at the same time
turning the valve stem, but yet carrying the valve stem with it towards or away from
the valve seat. Or in place of the stem of the valve being made to pass through the
cap it might be made to pass up into a recess formed in it, and the inner end of a
screw pin inserted through the side of the cap be made to enter a groove formed
around the exterior of the valve stem.
At the bottom of the stuffing box a hole is formed through the shell or body large
enough to permit of the valve being passed down through it.
Surrounding the stem of the valve is a loose ring the exterior of which fits the hole.
The sides of the hole and the ring are made conical or stepped to prevent the ring
from passing into the interior of the shell.
Above the ring is the packing, and the packing is held down on to it by a nut
screwed down into the upper part of the stuffing box recess.
In order that my said invention may be fully understood and readily carried into
effect I will proceed to describe the drawings hereunto annexed.
DESCRIPTION OF THE DRAWINGS.
Figure 1 is a longitudinal section and Figure 2 is an elevation of a screw down
valve tap constructed in accordance with my invention. Figures 3 and 4 show a
modification. Figures 5 and 6 show another modification.
a is the valve body, it is adapted to the supply pipe at a¹ and has an outlet at a².
a³ is a partition, on which is a valve, seating the partition separates to supply from the
outlet side.

page_text: The body is screwed at a to receive the screwed crutch cap b. At a³ an internal
stuffing box is formed, it has a screwed top c, it is square at the top to facilitate
screwing it into its place. A moveable ring d forms the bottom of the stuffing box.
The aperture in the body into which the ring d fits is sufficiently large to allow the
valve to be inserted through it. The valve e is formed at the lower end of the
spindle. The spindle passes up through the stuffing box and also through the screw
crutched cap it receives a washer g at its upper end and this is secured by a tap screw h.
At f is a shoulder on the spindle, which together with the washer 9 prevents the
spindle from moving longitudinally in the cap.
b
The tap shewn by Figures 3 and 4, differs from the preceding in that the spindle fis
secured to the cap 6 by a screw i, inserted through a hole in the cap, and entering a
ring groove in the spindle.
The tap shown by the Figures 5 and 6 differs from the preceding in that the cap b
is provided with an external screw thread 6× which engages with a corresponding
internal thread on the valve body a.
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 a screw down valve tap, the screwed crutch cap operating upon a spindle
valve and covering an internal stuffing box, substantially as described.
2. The combination substantially as described of a valve body a, a rising and falling
spindle with a valve e at its lower end, a screwed crutch cap b working on an
external screw on the body and carrying the spindle whilst allowing it to turn, and
an internal stuffing box a with screwed top c and guide ring bottom d surrounding
the spindle and moveable to allow the valve to enter as herein set forth.
3. The combination set forth in the second claim excepting with the screw
cap working in an internally screwed recess in the body substantially as described
in respect to Figures 5 and 6.