Improvements in Cocks or Valves for Water, Gas, Steam, or other Fluids.
Year: 1893

page_text: Date of Application, 4th Jan. 1893
Complete Specification Left, 3rd Oct., 1893—Accepted, 4th Nov., 1893
PROVISIONAL SPECIFICATION.
Improvements in Cocks or Valves for Water, Gas, Steam,
or other Fluids.
I JOHN LEWIS DUBOIS of 13 West Bank Stamford Hill N. Commercial
Agent do hereby declare the nature of this invention to be as follows:-
In that portion of the body of the cock or valve in which the screwed spindle
usually rotates for the purpose of opening or closing the passage therethrough
instead of cutting upon the internal surface the usual female screw thread I make
it of plain cylindrical form and place therein a spiral spring of suitable strength
one end of which takes into a slot or gap provided therefor and is held in position
and the said spring prevented from revolving by the screw cap by which I close
the top of the said cylinder or by other suitable means. The said screw cap is
provided with centre hole through which the spindle passes. The spiral spring
being of the same "pitch as the thread or worm formed upon the spindle duly
receives the same and acts in lieu of the ordinary fixed female thread so that by
turning in the usual manner the spindle is carried forward or withdrawn thereby
closing or opening the cock and the said spring being compressible by the forward
action of the screwed spindle it becomes possible to rotate the latter after the
valve has reached its seat with the result that each time the valve is used the
closing surfaces are "ground" together and long continued soundness is thereby
maintained.
-
Instead of using the spring as the "female" thread the position may be reversed
and the spring being attached at one end upon the spindle may serve as the thread
thereof and take into fixed "female" thread formed in the cylinder.
In some
cases both the "male" and "female" threads may be formed of spiral springs.as
described and so connected with the respective parts of the cock or valve 'as
that in addition to serving as and for " screws they can at the same time serve
as "springs."
"
In connexion with or formed upon the end of the spindle which enters the body
of the cock I provide a suitable valve piece which may be constructed either of
metal entirely or metal in conjunction with any other suitable material but I prefer
to make it of metal in the form of an inverted cone with seat in the cock of
corresponding shape to receive it. To more effectually ensure complete closing of
the passage way through the cock in some cases I so finish the inverted cone valve
that it appears as two three or more discs each disc in vertical section being.of
smaller diameter than the one immediately above it and of sizes corresponding
with the diameter of the cone shaped seat at the points where they respectively
take touch or contact.
By this means instead of only one contact as usual the
number will be in accordance with the number of discs employed.
In place of forming these discs upon or in connexion with the spindle the cone
shaped seat may take the form of a succession of annular rings or steps each ring
or step in vertical section being smaller than the one immediately above it and in
that case the closing coned valve may be made plain.
Dated this Fourth day of January 1893.
JOHN LEWIS DUBUIS.

page_text: COMPLETE SPECIFICATION.
Improvements in Cocks or Valves for Water, Gas, Steam,
or other Fluids.
I JOHN LEWIS DUBOIS of 13 West Bank Stamford Hill N. Commercial
Agent 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 :-
My invention relates to improvements in cocks or valves for water and other
fluids and its object is to do away with the flexible washer or packing usually
employed upon the valve for sealing the passage formed in the body of the cock.
In place thereof I employ metal to metal or other suitable rigid material in such
a manner that use of the valve instead of causing it to become unsound and leaky
is the means whereby it is maintained in proper and efficient condition.
To effect this it is necessary that the mechanism should be such that it will not
only carry the valve to and from its seat but will permit and cause it to move or
revolve thereupon in order that at each time of using the closing surfaces may
re-adjust or bed themselves together and so maintain a perfect fitting.
The following description and accompanying drawings will indicate the means
1 employ to secure this result.
In a cock or valve constructed according to my invention either the male or
female thread of the screw which forms the opening and closing mechanism instead
of being made fixed or solid with the respective parts of the cock to which they
belong consist of elastic spiral springs attached at one end and susceptible of
compression from the other.
Figure 1 is a sectional elevation of a cock or valve having the male thread of
spindle solid therewith and working in a spiral spring in lieu of a female screw
threaded nut.
A is the body or shell. B the cap or cover with hole to receive spindle C the
thread of which accurately fits chamber in which it works so as to ensure parallel
longitudinal motion. D is the crutch or lever. E is strong spiral spring with its
top end E¹ turned up into slot or hole in the collar F which being held in position
by the screwing down of the cap or cover B prevents the female spring thread E
from revolving. G is the division separating the inlet from the outlet with way-
hole therethrough. H is the packing to prevent the escape of water round spindle
when the valve is open.
The action is as follows.
When the spindle C is "screwed-down" for the purpose of closing the cock its
lower or valve end reaches the seat and shuts off the fluid but as the female spring
thread E can be compressed it follows that the revolving motion of the spindle can
be continued and the closing surfaces are thereby ground or bedded together
while the same motion thrusts backwards and increases the pressure of spring
thread E.
Figure 2 is an enlarged sketch of the collar F with the female spring thread E
attached but other methods of attaching the spring may be employed.
Figure 3 is sectional elevation of a cock made according to my invention in
which the female screw thread E. is cut or formed solid with an inner cylinder or
lining or upon the inner surface of the body. Where a cylinder is employed its
top end is joined to and forms part of the collar F and is held in position by the
cap or cover B. In this case the spiral spring C¹ acts as the male screw thread for
the opening and closing mechanism and is attached to a plain spindle C at its
lower end C. To close the cock the spindle C being turned in the usual manner
causes the male spiral spring thread C₁ to revolve with it and the latter working
in the fixed female screw thread E carries down the spindle C until its valve end
reaches the seat at G whereupon it can still be turned by reason of the com-
pressibility of the male spring thread C¹ for the purpose already described.

page_text: Figure 4 is an enlarged cross section of the plain spindle C showing the method
of attaching thereunto the male spiral spring thread C¹ but other methods may be
employed.
In certain cases where greater elasticity may be required both the male and
female screw threads may each be formed of a spiral spring equal in substance and
diameter made of wire of square section and attached to their respective parts of
the cock as shown in Figures 1 and 3 and working in each other as described.
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 having the opening and closing mechanism formed of a
screwed spindle working in an elastic spiral spring in lieu of a fixed female screw
thread substantially as described in Figures 1 and 2.
2. A cock or valve having the opening and closing mechanism formed of a spiral
spring attached to a plain spindle to serve as a male screw and working in a fixed
female screw thread substantially as described in Figures 3 and 4.
3. A cock or valve so constructed that the screw mechanism for opening and
closing is formed of a spiral spring attached to the spindle and working in a spiral
spring attached to the body and serving in lieu of solid male and female screw
threads substantially as described.
Dated this 30th day of September 1893.
JOHN LEWIS DUBOIS.