Improvements in Screw-down Taps and Cocks
Year: 1899

page_text: Improvements in Screw-down Taps and Cocks,
1, THOMAS WILLIAM SCOTT, of 2, Walpole Villas, Walpole Road, Bromley, in
the County of Kent, Engineer, do hereby declare the nature of this invention
to be as follows:-
This improvement in screw-down taps and cocks consists in making the spindle
and plug in one piece, the plug having no port or passage through it for the
passage of liquids.
In carrying out this invention, the plug is made conical, the seat or barrel
being correspondingly formed.
The plug may be either screwed down on a threaded pin extending upwards
from the bottom of the valve seat or barrel, which is made solid for the purpose
of carrying the pin, or the spindle may be threaded, and turn in a nut on the
top of the seat or barrel.
The plug may be arranged to rise off its scat, or descend from its seat, and
the liquid will pass round the plug the usual ports being made in the barrel.
The arrangement of plug above described will permit of grit being crushed
when the plug is screwed down, and the crushed grit will be washed away
directly the plug is raised, to allow the flow of the liquid.
Dated this 9th day of March 1899.
NEWTON & SON,
Agents for the Applicant.
Improvements in Screw-down Taps and Cocks.
I, THOMAS WILLIAM SCOTT, of 2. Walpole Villas, Walpole Road, Bromley, in
the County of Kent, 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:-
In the accompanying drawing I have shown, at
Fig. 1, in side elevation, partly in section, the preferred form of tap or cock.
Fig. 2 is a similar view of an obvious modification in the mechanical details
of construction; and
Fig. 3 is a similar view of another modification in the said mechanical details
of construction.
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page_text: and has no reference whatever to ordinary plug taps or cocks, and the invention
consists in the adaptation of a plug to a screw-down tap or cock.
The advantages of a screw-down tap or cock, compared with the ordinary plug
tap or cock, are well known, more especially in connection with a water supply,
but the screw-down taps or cocks, as at present constructed, require washers or 5
other devices to make them tight, which devices are continually requiring repair.
In carrying out this invention, I make the plug conical and solid, and in one
piece with the spindle, the handle being adapted to the spindle in any convenient
manner.
The plug may be arranged to rise off its scat, or to descend from its seat, and 1
the fluid will pass round the plug, instead of through it, as heretofore.
This arrangement of plug will provide for grit being crushed between the plug
and the barrel, as the plug finds its seat, and the crushed grit will be driven
away the next time the tap or cock is used.
And in order that my invention may be more clearly understood, I will now 1
describe it with reference to the accompanying drawings, in which the same
letters refer to corresponding parts in all the figures.
A is the barrel of the tap or cock, which is formed with a conical seat for the
plug, and with the usual inlet and outlet ports.
In Figs. 1 and 2, the bottom end of the barrel is solid, but in Fig. 3 it is 2
open.
The top end of the barrel is open in Figs. 1 and 2, and it is fitted to receive
a cap B, which forms a chamber to receive the plug, as it is moved off its seat.
In Fig. 3, this chamber B is at the bottom end of the barrel.
In the top of the chamber B, is a gland and stuffing-box C, for the spindle of 2
the plug.
Dis the plug which, in Fig. 1, is solid, in the sense that it presents an
unbroken surface to both the inlet and outlet of the barrel, while in Figs. and 3
it is absolutely solid, and, formed in one piece therewith, is the spindle E, on
the end of which is secured the handle F.
This plug may be bored longitudinally, and internally threaded, to take onto
a threaded pin G, which projects upwards from the bottom of the barrel, to which
it is secured in any convenient manner; or the spindle may be threaded, and
turn in a nut secured to the stuffing-box or gland C.
In Figs. 1 and 2, the plug will screw down on to its seat, while in Fig. 3 3
it will be just the reverse, and screw down off its seat; in both cases, however,
the larger end will enter the chamber B, which is formed to receive it.
It will be seen that, by the above construction of tap or cock, the use of
washers or other devices to make a tight valve will be entirely obviated.
Having now particularly described and ascertained the nature of the said
invention, and in what manner the same is to be performed, I declare that what
I claim is:
1. In a screw-down tap or cock, a solid conical plug formed in one piece with
its spindle, a barrel having a coned seat to receive the plug; a chamber to receive
the enlarged end of the plug: a stuffing box for the spindle; and a threaded 4
device for effecting the raising and lowering of the plug, all combined and oper-
ating as herein shown and described.
2. A screw-down tap or cock comprising a conical plug, and a stem of spindle
integral therewith, said plug having an unbroken peripheral surface, a barrel
having a conical seat to receive the plug; threaded means upon the barrel for 5
engaging the integral plug and stem, to raise and lower the same from its seat;
and means for turning the said stem and plug with respect to the said threaded
portion, substantially as described.
3. A screw-down lap or cock, comprising a conical plug having an unbroken
peripheral surface, a stem integral therewith, a barrel having a conical seat to 5
receive the said plug, an enclosing cap to receive the enlarged end of the plug,

page_text: a stuffing-box for the spindle, the said plug being hollow, and provided with
internal screw-threads, a screw-threaded standard secured to the barrel, and
adapted to extend into the hollow portion of the conical plug, and a handle for
turning the spindle and plug, the structure being such that when the plug is
turned, it will be raised or lowered by means of its internal threads acting upon
the threads of the standards, substantially as described.
4. A screw down tap or cock constructed, arranged, and operating as herein
shown and described.
T11011. If Tennushan 1200