Improvements in Valves or Cocks for the Prevention of Frost Bursts.
Year: 1896

page_text: Date of Application, 11th Dec., 1896-Accepted, 13th Mar., 1897
COMPLETE SPECIFICATION.
Improvements in Valves or Cocks for the Prevention of Frost
Bursts.
I, FREDERICK CONEY, of Windmill Hill, Ash, Surrey, Plumber, 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 refers to cocks or valves such as are used on mains or supply
pipes which convey water, often under considerable pressure, to cisterns or tanks,
for domestic use and like purposes.
It is designed to supply a cock or valve which when shut off will provide
automatically for the escape of the water in the pipe leading from the cock or
valve to the cistern, and thus avoid the usual practice of employing a separate tap,
to be operated by an attendant, with a view to prevent the bursting of the pipe
during the continuance of frost.
This is effected by means of a central tube or hollow spindle provided with a
double seated valve and perforated in such a manner as to allow all or nearly all
the water in the outlet end to escape.
This hollow spindle is combined with a supplemental exterior valve to control
outlet of same, and prevent the water in the main which is under pressure, from
escaping by the central tube during the operation of closing or opening the tap.
This exterior valve consists of a cap having a vertical check valve projecting
upwards free its lower end, and a moveable chamber attached to the end of the
hollow spindle which chamber engages with the said check valve so as to allow
water to pass only when, and not before the said tap is closed.
I will now describe the invention with reference to the accompanying drawings
in which:-
Fig. 1 shows a sectional elevation of my improved high pressure stop cock.
a is the central screwed spindle, which is tubular for about half its length, and
provided at about the middle with a valve & formed with two seats c c', one above
and one below.
The spindle extends downward through the bottom d', of the body d of the cock,
and is screwed at the bottom to receive a boss e, which is also screwed to receive a
box, in the bottom of which works automatically the vertical check valve g,
furnished with the usual guides d". The lower end of the spindle, boss, box and
valve, are all enclosed in an external cap or covering h, screwed at its upper end to
a boss ', formed below the opening d.
Referring to the valve b, k is the seating for the upper valve face c; and k¹ the
seating for the lower face c¹ is a stuffing box and gland placed around spindle a
to prevent leakage of water, where same passes through the aperture d'; is the
seating for the valve g. m, m, are holes for the escape of water at the bottom of
cap h; m² is the tube inside spindle a, n is a turn key at top of spindle.
The operation of the stop cock is as follows:
In the position shown, the main valve b is closed and the tube m¹ is open and
therefore all or nearly all the water left in the outlet side of the stop cock, can
escape through ducts m², down tube m', into box f, (and the check valve g being
open), through and down between the guides ", and finally it escapes through the
openings m. m.

page_text: When the main valve is opened, the consequent rising movement draws the
box fup to the check valve seat g, which prevents the flow of water through m
When closing the main valve the box is lowered and the bottom of the check
valve coming again into contact with the bottom of casing h, causes the valve to
rise and open.
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 I
claim is :-
1. In high pressure cocks or valves the combination of a hollow spindle furnished
with a double seated main valve, with a check valve which allows the escape of
water from the outlet pipe in the hollow spindle, to take place automatically
when the cock is shut, and prevents the escape of water from the main supply,
when closing or opening the cock or valve, as herein described and set forth.
2. In a cock or valve the combination of the hollow spindle a with double seated
valve b, the boss e, cap h, fitted with check valve g and box f the whole operated
by the handle or key n, as herein described and set forth.
Dated this 11th day of December 1896
S. S. BROMHEAD,
97, Newgate Street, London, E.C., Patent Agent.