Improvements in Cocks and Valves Especially Adapted for Steam, Hot or Cold Water, or other Fluids under High Pressure.
Year: 1886

page_text: Improvements in Cocks and Valves Especially Adapted for Steam,
Hot or Cold Water, or other Fluids under High Pressure.
We, WILLIAM HENRY TWINE of Devonshire House, Carlton Road Kilburn in
the Parish of Willesden, Foreman Smith and Hot-water Engineer; ARTHUR MARSH
DODWELL CHURCHILL, and HERBERT JOB HONOUR, both of 75 Chalk Farm Rd,
in the Parish of St. Pancras, Ironmongers, all in the County of Middlesex, 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:
1
Our improvements in Cocks and Valves are designed to supply an effective cock
or valve for steam, or for hot or cold fluids or gases flowing under high pressure,
but they are also applicable to form a durable and efficient low pressure tap or
valve.
The ordinary high-pressure water-cock or ball-valve so extensively used in Towns
where there is a high pressure. water supply, depends for its efficiency on an india-
rubber disc or washer which soon perishes or becomes leaky, when it requires to
be removed.
Our improved cock is formed entirely of metal, and is so arranged that the force
of the fluid to be passed through it is enlisted and utilised to keep its working
parts tight, whereby the system of employing a screw down spindle to close or open
the water-way is dispensed with.
In the body of our cock there is formed a cylindrical chamber in which is the
inlet for the water or other fluid to be passed. The lower part of this chamber is
a horizontal circular seat, in which is an opening of suitable size forming the outlet
of the cock and communicating directly with the delivery pipe or other exit.
On this horizontal seat is placed a metal disc having an aperture similar to the
aforesaid outlet.
A pin or sturt projects upwards from the centre of this disc and forms the pin
on the top of which the handle or spindle held by the operator is fitted and which
it grips so as to turn it when the tap is opened or closed. This pin or sturt can
be continued below the disc if preferred so as to assist the turning of the disc, in
which case a hole or recess is formed in the seat for the lower end to turn in.
Over the cylindrical chamber is placed the usual stuffing box through which the
pindle which turns the disc works. At the lower end of the stuffing box is a
beveled seat in which works a beveled collar fixed on the spindle or forming part
hereof which collar is designed to prevent leakage around the spindle. Between
his collar which is at the top and the disc which is at the bottom of the cylindrical

page_text: I is the aperture in the metal disc.
In the case of stop cocks, Bath-cocks or valves, a stop and quadrant dial can be
attached to the spindle and stuffing box so as to show how far the tap is opened,
or when it is closed.
It will be seen that cocks or valves, made on our principle are exceedingly simple
in construction and in action, and they have the great advantage of being opened
or shut by a very slight turn of the spindle or key.
For low pressure the cylindrical chamber can be lowered and the inlet brought
straight into it without the neck shown in the drawings, the disc and seat being
placed below the level of the inlet. In this way there will be no obstruction to
the passage of low pressure fluids.
Having now particularly described and ascertained the nature of our said
Invention and in what manner the same is to be performed we declare that what
we claim is;-
.
1. The method of closing the water-way of a Cock or Valve by means of a
circular disc working on a horizontal seat, in which the outlet is placed in such a
way that the pressure of the fluids assists to hold the disc firmly against the
seat, and thus closes the outlet when the cock is turned off as herein described and
set forth.
2. The method of preventing leaking around the handle or spindle which opens
or closes the cock, by a beveled collar placed on the said spindle, and a seat in
which the said collar works, as herein explained and set forth.