Improvements in Screw-down Taps, Cocks, and Valves.
Year: 1891

page_text: Date of Application, 6th May, 1891
Complete Specification Left, 6th Feb., 1892-Accepted, 12th Mar., 1892
PROVISIONAL SPECIFICATION.
Improvements in Screw-down Taps, Cocks, and Valves.
I, ALFRED EVANS DYSON, of 3, Carpenters Road, Lozells, Aston, Warwick-
shire, Plumber and Zinc Worker, do hereby declare the nature of this invention
to be as follows:-
This invention consists of the herein described improvements in screw down taps,
cocks and valves for water, gas, steam and for other purposes.
In carrying out this invention instead of making the cross piece or the hand
wheel (by which the valve spindle is turned to open or to screw down the valve)
separate from the valve spindle as heretofore, I cast or otherwise form the said
cross piece or the hand wheel in a piece with the valve spindle thereby considerably
increasing the strength of these parts as there is no risk of the top of the spindle
being wrenched off.
The valve spindle has a screw thread which works in the cover or in a nut therein
but instead of forming this screw thread directly on the valve spindle as is usual
I make the screw thread on a separate tubular piece which fits on the spindle. The
inside of this tubular piece and that part of the spindle on which it fits are square
or otherwise formed so that the tubular piece and spindle will turn together. The
said tubular piece is threaded on to the lower end of the spindle and secured by a
nut or other means and when the screw thread is worn this tubular piece can be
removed and replaced by a fresh one thus saving the expense of making a new
spindle. The valve is or may be formed in a piece with the said tubular piece at
the lower end thereof.
By first removing this tubular piece from the valve spindle the latter can readily
be withdrawn from its stuffing box or replaced therein.
Dated this 5th day of May 1891
CHARLES BOSWORTH KETLEY,
Agent for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Screw-down Taps, Cocks, and Valves.
I, ALFRED EVANS DYSON, of 3, Carpenters Road, Lozells, Aston, Warwick
shire, Plumber and Zinc Worker, 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 :-
This invention consists of the improvements in screw down taps, cocks and valves
for water gas steam and for other purposes as herein described with reference to
the accompanying drawing.
In a screw down tap cock or valve constructed according to this invention the
crosspiece or handwheel by which the spindle is turned is made in a piece with the
spindle and therefore cannot be removed and there is no risk of the top of
the spindle (which is usually reduced in size to fit in the said crosspiece or valve)
being wrenched off. Moreover the screw thread on the spindle can readily be
removed from the spindle when worn and replaced by a new screw threaded part.
On the accompanying drawing
Fig. 1 is a sectional elevation of a straight through screw down tap or valve
with my invention applied and
Figs. 2, 3, 4 and 5 represent detailed parts of the same separately Fig. 2
representing the spindle and crosspiece; Fig. 3 the screw threaded part of the

page_text: same; Fig. 4 the usual leather washer and Fig. 5 the nut by which the washer
Fig. 4 and the screw threaded part Fig. 5 are secured to the spindle.
Figs. 6, 7, 8, 9 and 10 illustrate my invention applied to a screw down bib valve
in which the valve is separate from the spindle instead of being fixed thereto as in
the example shewn by Figs. 1 to 5, Fig. 6 being a sectional elevation of the com-
plete bib valve; Fig. 7 shewing the spindle and crosspiece of the same separately;
Fig. 8 the screw threaded part of the said spindle separately; Fig. 9 the nut for
securing the same on the spindle and Fig. 10 the valve.
The same letters of reference refer to the same or corresponding parts in all
the figures.
a is the body of the tap or valve, b is the cover made with a stuffing box c and
gland d. All these parts are of the usual construction. e is the crosspiece (or
instead of the crosspiece a hand wheel) (by which the valve spindle is turned to
open or to screw down the valve g) which instead of being made separate from the
valve spindle f as heretofore I cast or otherwise form in a piece with the valve
spindle thereby considerably increasing the strength of these parts as before
stated.
The valve spindle f has a screw thread which works in the cover b (or in a nut
therein) but instead of forming this screw thread directly on the valve spindle f
as is usual I make the screw thread on a separate tubular piece (shewn separately
by Figs. 3 and 8) which fits on the spindle f. The inside of this tubular piece h
and that part of the spindle f on which the tubular piece h fits are square
(Figs. 1, 2 and 3) or otherwise formed as round with a flat on one side (Figs. 6, 7
and 8) so that the tubular piece h and spindle will turn together. The tubular
piece is threaded on to the lower end of the spindle and secured by a nut i
or other means.
When the screw thread is worn this tubular piece h can be
removed and replaced by a fresh tubular piece thus saving the expense of making
a new spindle. By first removing this tubular piece h from the valve spindle the
latter can readily be withdrawn from its stuffing box or replaced therein.
The valve proper g is or may be formed in a piece with the tubular piece h at the
lower end thereof as in the example illustrated by Figs. 1 to 5; or as shewn in
tbe bib valve illustrated by Figs. 6 to 10 the valve g may be entirely separate from
the spindle as is usual in other bib valves of this kind.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed 1 declare that what I
claim is :-
A screw down tap cock or valve in which the crosspiece or hand wheel is made
in a piece with the spindle and the screw threaded part of the spindle which works
in the cover (or in a nut in the cover) is made removable from the spindle sub-
stantially as herein before described and illustrated by the accompanying drawing
for the purposes set forth.
Dated this 5th day of February 1892.
CHARLES BOSWORTH KETLEY,
Agent for the Applicant.