Improvements in Cocks or Valves.
Year: 1889

page_text: Date of Application, 18th Mar., 1889
Complete Specification Left, 12th Dec., 1889-Accepted, 18th Jan., 1890
PROVISIONAL SPECIFICATION.
Improvements in Cocks or Valves.
I, BENJAMIN RHODES of 234 and 240 Bow Road, in the County of Middlesex, Brass
Founder, do hereby declare the nature of this invention to be as follows:-
This invention relates to cocks or valves for acids and other corrosive fluids.
Within the shell of the cock I leave a space around the plug to receive a packing of
non corrosable material, such as asbestos or mixtures thereof. This space is preferably
of an approximately square form so as to be able to receive a larger amount of packing
than mere grooves. The packing not only surrounds the sides of the plug but also
conies above it and surrounds its stem. The shell of the cock only touches the plug
around the fluid-way in all other places the plug is in contact with the packing. The
inner surface of the shell and the surface of the plug and of the hole through it, and
also the part of its stem within the cock are covered with non-corrosive metal cement
or enamel.
In order to make a tight joint between the packing and the shell and also the stem
of the plug two stuffing boxes are employed, one within the other. The outer stuffing
box screws into the shell whilst the inner one screws into the first. By screwing
down the outer stuffing box the packing is forced against the sides of the shell,
whilst by screwing down the inner one the packing is forced against the stem of
the cock.
Bath 10th
L 1000
COMPLETE SPECIFICATION.
Improvements in Cocks or Valves.
I, BENJAMIN RHODES of 234 and 240 Bow Road in the County of Middlesex Brass
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 :-
This Invention relates to cocks or valves for acids and other corrosive fluids.
Within the shell of the cock I leave a space around the plug to receive a packing
of non corrosable material, such as asbestos or mixtures thereof. This space is
preferably of an approximately square form so as to be able to receive a larger amount
of packing than mere grooves. The packing not only surrounds the sides of the plug
but also comes above it and surrounds its stem. The shell of the cock only touches
the plug around the fluid way in all other places the plug is in contact with the
packing. The inner surface of the shell and the surface of the plug and of the hole
through it, and also the part of its stem within the cock are covered with non-
corrosive metal.
In order to make a tight joint between the packing and the shell and also the stem
of the plug two stuffing box glands are employed one within the other. The outer
stuffing box gland screws into the shell whilst the inner one screws into the first. By
screwing down the outer stuffing box gland the packing is forced against the sides of
the shell, whilst by screwing down the inner one the packing is forced against the
stem of the cock.
In order that my said Invention may be most fully understood and readily carried
into effect I will proceed to describe the drawings hereunto annexed.

page_text: DESCRIPTION OF THE DRAWINGS.
Figure 1 is a longitudinal and vertical section of a cock constructed in accordance
with my Invention. Figure 2 is a horizontal section of the same...
a is the outer shell of the cock and b is an inner shell of non corrosive or acid
resisting metal such as lead, antimony regulus, copper, silver, gold, aluminium, &c.
according to the particular, acid the cock is intended to control.
c is the plug of the cock also with a covering el of non corrosive metal, disa packing
recess filled with asbestos or like packing this recess is approximately square in
transverse section so that it holds a considerable body of packing, e is a gland which
screws into the inner shell and compresses the packing into it. is a second gland
which works, within the gland e and serves to compress the packing around the neck
of the plug.
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
1. A cock, or valve such as described with a square packing space d receiving
a body of packing surrounding the plug and extending up and around its neck
or stem.
2. A cock or valve such as described with a packing space d; receiving a body of
packing surrounding the plug and a lining to the shell and a covering to the plug of
non corrosive or.acid resisting metal.
3. A cock or valve such as described having a packing space d' receiving a body of
packing surrounding the plug and extending up and around its neck or stem and
having two glands e and the one compressing the packing into the shell and the
other against the neck or stem of the plug.
Dethie 19th low at Danaushan 1980
B. RHODES.