Year: 1887

page_text: Date of Application, 10th Nov., 1887
Complete Left, 3rd Feb., 1888
Complete Accepted, 16th Mar., 1888
I, JOHN GEORGE FLINT, of Market Harborough, in the County of Leicester, Wine
Merchant, do hereby declare the nature of this invention to be as follows :-
My invention relates to stop cocks of that class which is employed for cutting off the
supply of water from water pipes during frosty weather and for allowing the water
above the cock to escape to prevent the bursting of the said pipes.
The cock constructed according to my invention is provided with a small auxiliary
passage in the plug at or nearly at right angles to the main passage and communi-
cating therewith. When the cock is closed this auxiliary passage is turned opposite
to the pipe to be emptied the supply pipe being closed by the solid portion of the plug.
In the shell of the cock opposite to the passage in the plug when the latter is in its
closed position is formed an opening through which the water that enters the main
passage of the plug through the auxiliary passage can be discharged. This opening
may be provided with a small cock if desired and attached to a waste pipe.
When the cock is in its open position, that is when the main passage is in commu-
nication with the supply pipe the auxiliary passage in the plug is covered by the solid
portion of the shell of the cock and the opening in the said shell is closed by the solid
side of the plug. A pin or stop is provided to prevent the plug being moved
too far in either direction.
In some cases when there is no inlet for the air above the cock we arrange a small
valve in connection with some suitable part of the pipe to be emptied. This valve is
adapted to be held in a closed position under the pressure of the water when the latter
is turned on. When however the pressure is removed the valve is adapted to open
automatically to admit air into the pipe so as to allow the water to flow out.
Dated the 10th day of November 1887.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London,
Agents for the Applicant.

page_text: Improvements in Stop-cocks.
I, JOHN GEORGE FLINT, of Market Harborough, in the County of Leicester, Wine
Merchant, 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 stop cocks of that class which is employed for cutting off
the supply of water from water pipes during frosty weather and for allowing the water
above the cock to escape to prevent the bursting of the said pipes.
The cock constructed according to my invention is provided with a small auxiliary
passage in the plug at or nearly at right angles to the main passage and communi-
cating therewith. When the cock is closed this auxiliary passage is turned opposite
to the pipe to be emptied the supply pipe being closed by the solid portion of the plug.
In the shell of the cock opposite to the passage in the plug, when the latter is in its
closed position, is formed an opening through which the water that enters the main
passage of the plug through the auxiliary passage can be discharged. This opening
may be provided with a small cock if desired and attached to a waste pipe.
When the cock is in its open position, that is when the main passage is in commu-
nication with the supply pipe the auxiliary passage in the plug is covered by the solid
portion of the shell of the cock and the opening in the said shell is closed by the solid
side of the plug. A pin or stop is provided to prevent the plug being moved too far
in either direction.
In some cases when there is no inlet for the air above the cock, we arrange a small
valve in connection with some suitable part of the pipe to be emptied. This valve is
adapted to be held in a closed position under the pressure of the water when the
latter is turned on. When howover the pressure is removed the valve is adapted to
open automatically to admit air into the pipe so as to allow the water to flow out.
In order that my said invention may be understood I will describe how it may be
conveniently and advantageously carried into practice by reference to the accompanying
drawing, in which
Figure 1 is an elevation of a stop cock constructed according to my invention.
Figure 2 is a vertical section of the same on the line x x, the main passage of tho
cock being shown as open, and
Figure 3 is a view similar to Figure 2 but showing the main passage closed and the
auxiliary passage open.
a is the shell of the cock and b is the plug, the latter being provided with the main
passage c and the auxiliary passage d.
e is the opening in the shell with which the passage c of the plug communicates
when the main passage is closed.
The water normally flows through the cock in the direction of the arrow, figure 2,
during which time the opening e is closed. When, however the plug is turned
through a quarter of a revolution to the position shown in figure 3 the supply of water

page_text: is cut off and the auxiliary passage is placed in communication with the delivery side
of the cock, so that the water in the delivery pipe can flow through the said
passage d into the main passage c, and thenco escape through the opening e, as
indicated by the arrow, figure 3.
fis a pin which is placed in the plug to prevent the latter from being moved too far
in either direction.
9 is a small cock which is screwed into the opening e to close the same if desired, or
a pipe may be connected to the said opening.
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 having an auxiliary passage in the plug communicating with the main
passage and adapted when the plug is turned to prevent the flow of liquid through the
cock to establish communication between the delivery side of the cock and an opening
in the shell so that the liquid on the said delivery side of the said cock will be able to
escape, substantially as described.
2. The improved cock constructed substantially as described with reference to the
accompanying drawing.