Improvements in or applicable to Plug Cocks.
Year: 1896

page_text: Date of Application, 14th Jan., 1896
Complete Specification Left, 13th Oct., 1896-Accepted, 21st Nov., 1896.
PROVISIONAL SPECIFICATION.
Improvements in or applicable to Plug Cocks.
I WALTER MOORHOUSE of 13 Mostyn Street Stalybridge, in the County of
Chester, Brass and Iron Founder, do hereby declare the nature of this invention
to be as follows:-
This invention relates to improvements in or applicable to what are known as
"plug cocks" and employed for steam or other fluids under pressure, and
especially to that class of plug cocks which are made with cylindrical plugs."
These cocks are usually provided with an annular packing placed in a recess.
formed in the body beneath the bottom end of the plug, as well as with side
packings placed in vertical grooves made in the interior of the barrel, and are.
kept tight by a stuffing box at the top, the cover of which also presses on the top
of a shoulder formed on the plug in order to hold it down firmly on to the bottom
packing. The objection to this method of construction is that the cover at the.
same time that it compresses the packing of the stuffing box, also equally
compresses (by means of the plug) the bottom packing, there being no possibility.
of adjusting or regulating the pressure of one without equally affecting the
other.
My improvements are designed principally for the purpose of allowing the top "
and bottom packings of the plug to be separately and independently adjusted, so
that in tightening the one there is no need to put undue pressure upon the
other.
For the purpose of my invention I construct a cylindrical plug cock in the
usual manner with an annular packing below, vertical packings round the body of
the plug, and a single stuffing box above, but I so form the cover of the latter that
it bears only upon the packing in the stuffing box and exerts no downward pressure
upon the plug itself.
1 make the latter with a shoulder as usual and I bore out the cover or gland
larger than the stem of the plug so that there shall be an annular space between
the two, and I provide a supplementary cover or gland with an annular projection
beneath, which fits into the before mentioned space above the shoulder of
the plug.
Between the latter and the annular projection I prefer to place a loose ring of
antifriction or other metal and I provide both the covers or glands with separate
and independent bolts and nuts; and it will be evident that by these means the.
plug can be tightened on to the bottom packing without unduly compressing the
packing of the stuffing box, and the latter can as easily be adjusted without
interfering with the bottom packing.
1000
GEO. DAVIES & SON,
4, St. Ann's Square, Manchester, Agents for the Applicant...

page_text: 1 WALTER MOORHOUSE, of Cockerhill Works, (late of 13 Mostyn Street)
Stalybridge, in the County of Chester, Brass and Iron Founder, 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:-
66
This invention relates to improvements in or applicable to what are known as
plug-cocks" and employed for steam or other fluids under pressure, and
especially to that class of "plug-cocks" which are made with cylindrical plugs.
My invention will be readily understood on reference to the sheet of illustrative
drawings hereunto annexed and the following explanation thereof.
Fig. 1 is a longitudinal vertical section, Fig. 2 a transverse vertical section,
Fig. 3 a plan view and Fig. 4 a horizontal section of a cylindrical plug-cock
constructed in accordance with my invention.
a is the body of the cock and b the cylindrical plug. These cocks are usually
provided with an annular packing e placed in a recess formed in the body a beneath
the bottom end of the plug b, as well as with side packings d, (see Fig. 4) placed
in vertical grooves made in the interior of the barrel or body, and are ordinarily
kept tight by a single stuffing-box at the top, the cover of which also presses on
the top of a shoulder formed on the plug in order to hold it down firmly onto the
bottom packing.
The objection to this method of construction is that the cover, at the same time
that it compresses the packing of the stuffing-box, also equally compresses (by
means of the plug) the bottom packing c, there being no possibility of adjusting or
regulating the pressure of one without equally affecting the other.
My improvements are designed principally for the purpose of allowing the top
and bottom packings to be separately and independently adjusted, so that in
tightening the one, there is no need to put undue pressure upon the other.
For the purposes of my invention I construct a cylindrical plug-cock in the
usual manner with an annular packing c below, vertical packings d round the body
of the plug and a single stuffing-box e but I so form the cover e+ of the latter that
it bears only upon the packing in the stuffing-box e and exerts no downward
pressure upon the plug b itself.
I make the latter with a shoulder at 6+ as usual and I bore out the cover or
gland et larger than the stem of the plug c so that there shall be an annular space
between the two, and I provide a supplementary cover or gland f. with an annular
projection + beneath, which fits into the before mentioned space above the
shoulder b+ of the plug.
Between the latter and the annular projection f+ I prefer to place a loose ring g
of antifriction or other metal, and I provide both the covers or glands e and f with
separate and independent bolts and nuts and +, and it will be evident that by
these means the plug b can be tightened onto the bottom packing c without unduly
compressing the packing of the stuffing-box e, and the latter can as easily be
adjusted without interfering with the bottom packing c.
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 improvements in plug-cocks consisting in boring out the cover or gland of
the ordinary stuffing-box larger than the stem of the cylindrical plug, so that there)
shall be an annular space between the two, and in providing a supplementary cover
or gland formed with an annular projection beneath, which fits into the before-

page_text: mentioned space and bears upon the shoulder of the plug, each cover or gland
being furnished with separate and independent bolts and nuts, so that either
packing can be adjusted independently of the other substantially as hereinbefore
described and illustrated by the accompanying drawings.
Dated this 12th day of October 1896.
GEO. DAVIES & SON,
4, St. Ann's Square, Manchester, Agents for the Applicant.