Improvements in Cocks and Valves, and in the Method of Packing the same with Asbestos or other suitable Material.
Year: 1893

page_text: Date of Application, 22nd Feb., 1893-Accepted, 19th Aug., 1893
COMPLETE SPECIFICATION.
Improvements in Cocks and Valves, and in the Method of Packing
the same with Asbestos or other suitable Material.
JOHN WILLIAM HOLLAND 10 Sparsholt Road Crouch Hill London N.
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:-
The object of this invention is to provide a sound and reliable cock or valve in
which the packing will be more durable and which can be more easily tightened,
when necessary, and the packing can be renewed by any unskilled person. It
frequently happens with many forms of cocks and valves now in use that when the
packing is tightened up the key or plug is so tightly bound as to require a
considerable amount of force to work or turn it. My improvements obviate that
difficulty. In my improved form of valve or cock no undue pressure is put upon
the plug or key although the packing is compressed and forced round it sufficiently
tight to make it sound.
My improvements consist of a particular kind of sleeve to be placed inside the
body of a cock or valve. The sleeve occupying a space between the plug and the
body in the manner usual with such sleeves or liners.
In the accompanying drawings
Fig. 1 is an elevation, partly in section, of a cock constructed according to my
invention.
Fig. 2 is a plan, partly in section.
Fig. 3 is a sectional elevation of the sleeve and Fig. 4 is a plan of the sleeve.
In these figures A is the body of the cock, B the plug or key, C the sleeve,
D and D' gland nuts and E packing.
In carrying out my invention I provide a sleeve of suitable material of the
approximate configuration shown in Fig. 3 and I fit this in the manner usual with
packed cocks to the plug or key of the cock or valve. Openings are made in the
sleeve for the passage of the liquid or fluid as shown at F corresponding to the way
through the body of cock or valve and also for the purpose hereinafter mentioned.
The plug or key turns within the sleeve, the sleeve remaining stationary and of
course the openings F correspond with the passage through the cock or valve. The
body of the cock or valve is adapted internally to receive the sleeve and a
packing E of asbestos or other suitable material which is inserted between the
sleeve and the body of the cock or valve and is worked or pressed so that it is
forced through the openings G provided in the sleeve for that purpose. In putting
the cock or valve together the plug or key is inserted into the sleeve, a shoulder is
formed upon the key or plug and upon this shoulder an additional quantity of
packing is placed. A gland or packing nut D is then screwed into the body of the
cock or valve. This nut is provided with 2 concentric rings forming a groove or
channel as shown at H in Fig. 1 corresponding in position to the top end of the
sleeve. In the act of screwing down the gland nut D the rings compress the
asbestos on the inner and outer edge of the sleeve. The rings are however not
essential. The gland or packing nut D may if preferred be in two parts, that is a
loose gland with a nut above to force it down by screwing into the body of the cock
or valve as described above.
A similar gland nut is sometimes provided for the bottom of the cock or valve
when the plug or key is extended right through the body of the same. But if the
key does not extend right through the body then a solid nut as D' is employed and
in addition to the ring of packing a larger body of packing is provided for filling up
the space in the nut. In other respects the cock or valve may be made of the
general form and in the usual way.

page_text: 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 1
claim is :
1. In a cock or valve for liquids or fluids the combination of a plug or key with
a sleeve such as C employed in the manner and for the purpose hereinbefore
described.
2. A sleeve such as C employed in the manner and for the purpose hereinbefore
set forth.
3. A cock or valve combined and arranged in the manner hereinbefore set forth
and illustrated in the drawings.
Dated this 22nd day of February 1893.
JOHN W. HOLLAND.