Improvements in Diaphragm and Disc Valves for Chemical Corrosive Fluids, Gases, and the like.
Year: 1896

page_text: Date of Application, 16th May, 1896
Complete Specification Left, 15th Feb., 1897-Accepted, 15th May, 1897
PROVISIONAL SPECIFICATION.
Improvements in Diaphragm and Disc Valves for Chemical Corrosive
Fluids, Gases, and the like.
CHARLES HENRY CLIFFORD RUDD Thistle Chemical Plant Works St. Anthonys
Newcastle-on-Tyne Chemical Plant Maker do hereby declare the nature of this
invention to be as follows:-
Hitherto, valves of the diaphragm type have been fitted with an india rubber dise
or diaphragm which on operating the hand wheel on top of valve dome was by means
of a brass or iron disc on lower end of valve spindle pressed down on to face of
inlet orifice inside of valve body to stop the flow of liquor, and thus the rubber
diaphragm was continually in contact with the fluid and subjected to much strain
causing the rubber to crack and break asunder in a very short time thereby allowing
liquor to reach the valve spindle and other working parts causing damage to latter
and also to valve seat or face. The valve bodies and other parts being generally of
iron or brass, would not satisfactorily withstand the action of the corrosive liquors
passing through. Thus the valves could not be used with any satisfactory result
attending and the necessity of a more efficient means was realised. My invention
consists of placing a non corrosive metals disc or diaphragm inside the valve body
between the india rubber diaphragm and valve face or seat. The metal disc here
referred to is screwed on to an extended end of valve spindle which comes down
through and below the rubber diaphragm. The metal disc thus takes the place of the
rubber diaphragm to stop or regulate the flow of liquor. Also other wise the extended
end of valve spindle may be made without a screw thread instead of which latter it is
bored out and a shank or spindle extending from top side of metal disc would fit in
and work in it the disc being raised from valve face or seat by force of liquor when
released by operating hand wheel.
I construct the rubber diaphragm of two pieces of rubber placed closely together.
Also I sometimes use a non corrosive metal washer or cover instead of rubber
diaphragm. I make the valve body, dome, disc in regulus, aluminium, tin, copper,
platinum or other suitable metals likewise the washer or cover above referred to is
in the same metals or materials. The operating wheel, head bush, spindle & guide
are of brass or other such suitable metals. The spindle is screw cut with a square
thread as is also the head bush by which spindle is operated.
Some of the advantages attained by my invention are as under-
1. The metal disc or stopper being placed between rubber diaphragm and valve face
prevents pressure on the rubber also causes latter to last longer.
2. The rubber diaphragm being made of two pieces one piece will remain perfectly
good until the first is worn out.
3. The metal washer or cover instead of rubber causes the valve to be suitable for
heated Equors.
4. The parts above described being made in non corrosive suitable metals are not
acted upon by the liquids steam or gases passing through or coming into contact with .
them.
Dated this Thintsanth

page_text: Improvements in Diaphragm and Disc Valves for Chemical Corrosive
Fluids, Gases, and the like.
CHARLES HENRY CLIFFORD RUDD, Thistle Chemical Plant Works, St. Anthonys
Newcastle-on-Tyne, Chemical Plant Maker, do hereby declare the nature of this inven-
tion and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement :-
My invention is shewn forth by the accompanying drawings in conjunction with
this Complete Specification as follows, namely-Fig. 1 (in section) A. is valve body,.
with seat a. a; B is the valve, disc or plug; C is valve screwed spindle with guide
wings c 1 and disc c 11 and having its lower or bottom end screwed into socket of
valve B; D is the head-bush; E. is the handwheel or handle; F. is the dome with
guide stays F F, on which guide wing cl works or travels; E. e. is a nut; G. & H.
are two rubber discs or diaphragms.
In Fig. 2 E is a handle; is valve screwed spindle with guide wings c 1; I is the
valve cover with combined gland or packing box J.
Fig. 3 is an external view of Fig. 1.
Fig. 4 is a representation in plan of Fig. 2 valve body A all else removed.
Fig. 5 shews a valve with a flat or mitred seat a. a. on outside of inlet K and with
screwed boss L for rotative spindle.
Fig. 6 is my valve with straight way body A; K is the inlet and M is the outlet
or delivery ends, a. a. is the seat; B is the valve, disc or plug & spindle with flange or
collar b cast on; b has slots b. b. in two of its sides; screwed spindle C is cast into B.
D. is the head bush, E. is the handwheel or handle; F is the dome with cover I and
gland or grooved packing box J combined; F. F. a is the guide stay.
In Figs. 1. 2 & 6 head bush D passes freely up through top of dome F and hand-
wheel or handle E and nut Ee. which latter (E e.) is screwed on to bush D to
prevent D. E. F. from becoming detached. Bush D. is screwed internally with a
square or other suitable thread and on operating the handwheel or handle E.
D. rotates on outside of screw C of valve & spindle B causing the latter to rise or
fall. Figs. 1 & 2 shew a guide wing c 1 on screwed spindle C, also guide bars F. F.
inside of dome. The ends of guide wing c 1 are slotted and fit on to F. F. thereby
preventing C. & B. from rotating.
In Fig. 6. F. F.a is the guide bar which is cast or fitted inside the body A of the
valve; there are two such guide bars in each valve. On valve spindle B the slots b. b.
in flange or collar b. fit on to guide bars F. F.a and prevent B. & C. from rotating.
On opening the valve B the flange or collar b. comes up against the underside of
cover I which checks the lift of B and also prevents liquor from getting up to gland
box J when valve is full open. The dome F. and cover I are made in one piece of
metal.
The gland or packing box J is simply a grooved part inside of spindle way of I.
The body A. is constructed to give a free flow to the liquids.
Fig. 1 shews two rubber discs or diaphragms G. & H. placed closely together and
compressed in their centre by means of the disc e 11 and valve B thereby ensuring a
perfectly tight joint. G. & H. can be used to act as a valve cover instead of metal
cover in Figs. 2 & 6 when necessary. Also in valves where no metal disc B. is
required G & H. can be used as the operating valve actuated by the spindle disc c 11
pressing on top side of G. H. with the advantage and improvement that whereas in
the old style of diaphragm valve only one rubber was used thereby causing often
renewing also damage to valve & other drawbacks, the two rubbers (instead of one)
ensure a much longer life to the valves, seeing the top rubber will remain intact until

page_text: the bottom one is wholly destroyed also there being a top rubber it will enhance the last
of the bottom one.
Fig. 5 Valves after the manner of Fig. 5 can also be constructed with dome F.
cover I. J. guide bars F. F. a; spindle C, valve B. guide wings b. b, flange b, &c. as
in Fig. 6. also with corresponding parts in Figs. 1 & 2.
The parts A. B. I. F. b. bb. FF. FFa. are made in special non corrosive metals
such as lead regulus, antimony, bismuth aluminium silver, gold, platinum, tin, copper,
gunmetal, also in iron, earthenware, glass, rubber wood or other such suitable metals or
materials or alloys.
The parts E. D. C are made in iron, brass or other such strong & durable metals.
The packing in gland box is india rubber or other such elastic durable substances or
materials.
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
1st. Making and constructing all valves and parts thereof for use with corrosive
liquids and the like after the manner and design as herein described of Fig. 6 with
reference to the accompanying drawings.
2nd. To make & construct also the parts of valves as shewn and described with
reference to Figs. 1; 2; & 5 lettered correspondingly D. E. F. FF. C. B. I. J.
L. G. & H.
3rd. To make Fig. 6 with a bib delivery, and to make the inlet, delivery, and
headgear at any other required angle to each other, and to employ flanges, spigot,
screwed or other suitable means ends for fixing valves in position.
4th. To make valve B with spigot top to work in hollow end (or socket) of spindle C,
or with no spigot top.
5th. To use any other suitable form of valve body with my invention or parts
thereof applied to same.
CHARLES HENRY CLIFFORD RUDD.