Improvements. in. Blow Off Cooks.
Year: 1895

page_text: „Date of Application, 12th Feb, 1895
Complete Specification. Left, 12th. Nov... 1895-Accepted, 14th Dec., 1895
Improvements. in. Blow Off Cooks.
We, GEORGE CROYDON MARKS, of 18 Southampton Buildings, London W.C.
Consulting Engineer and Patent Agent, and AUGHTON HUTCHINSON MORDEY,
of 18 Stoughton Street, Cardiff, in the County of Glamorgan, Engineer, do hereby
declare the nature of this invention to be as follows:
This invention relates to improvements in blow off cocks for attachment to
boilers and for like purposes,.whereby we are enabled to blow off water; steam or
scum from the same outlet or branch.
In carrying our invention into effect when constructing a cock suitable for
attachment to a boiler; we make it in one form to act in connection with a gauge
glass the handle of the cock being arranged to serve as an indicator for placing
against the water level in the glass when it is desired to blow off water, and for
placing above or against the steam space in the glass when it is desired to blow off
steam, and upon the surface of the water when it is required to blow off scum. On
the underside of the valve or cock plug we attach a tube or bent pipe which
projects into the interior of the boiler, and we arrange the handle upon the stem of
the plug such that its. position corresponds to the direction in which the tube is
lying within the boiler so that when the handle is turned' against the gauge glass
the tube will draw either team, scum or water depending upon the position in
which the Handle or indicator is placed' against the glass.
We make the plug of the valve hollow so that the tube attached to the base
may deliver into the hollow chamber and then through the orifices at the side and
out by a Branch pipe through another regulating cock when such is made to work
in combination with it..
We make our cock body of any desired form, the plug being also made with its
seating and gland' provided for in the usual manner and we attach one end' flange to
the boiler for making the connection thereto while the outlet branch flange we
attach to a blow off or stop cock of any ordinary form.
When making our improved valve as a combination stop cock and blow off cock
in one casing so as to dispense with the independent stop valve, we form the
spindle of our valve as a screw down valve which closes the end of the orifice
delivering into the hollow chamber of the main plug so that when this main plug is
turned and with it the collecting bent pipe at its base, the delivery to the interior of
the hollow plug is not made until the interior or supplementary shut off valve is with-
drawn or screwed up. We make the branch or outlet of this pipe of any desired form
to suit the connection which is to be made thereto, sometimes making it to connect to
a range of piping or to have a screw end for a nipple attachment. The body of
the combination cock and the ordinary fittings we make of well known types
employed at present for similar purposes.
Dated this 10th dox of Fahr 1905

page_text: '
We, GEORGE CROYDON MARKS, of 18 Southampton Buildings, London W.C.,
Consulting Engineer and Patent Agent, and AUGHTON HUTCHINSON MORDEY,
of 18 Stoughton Street, Cardiff, in the County of Glamorgan, Engineer, 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 relates to improvements in blow off cocks for attachment to boilers
and for like purposes, whereby we are enabled to blow off water, steam, or scum,
from the same outlet or branch.
In the accompanying sheet of explanatory drawings to be hereinafter referred
to :-
Figure 1 is a sectional side elevation and Figure 2 a. front elevation of our
improved cock as used in conjunction with an ordinary blow off or stop cock.
Figure 3 is a sectional side elevation of our improved cock arranged as a
combination stop and blow off cock.
The same reference letters in the different views indicate the same parts.
In carrying our invention into effect when constructing a cock suitable for
attachment to a boiler, we make it in one form to act in connection with a gauge
glass as shown at Figure 2. The handle A of the cock is preferably arranged to
serve as an indicator for placing against the water level in the gauge glass B when
it is desired to blow off water, and for placing above or against the steam space in
the glass when it is desired to blow off steam, and upon the surface of the water
when it is required to blow off scum. On the underside of the valve or cock plug
we attach a tube or bent pipe C which projects into the interior of the boiler,
and we arrange the handle A upon the stem of the plug such that its position
corresponds to the direction in which the tube is lying within the boiler as shown
at Figure 2 so that when the bandle is turned against the gauge glass the tube
will draw either steam, acum, or water, depending upon the position in which the
handle or indicator is placed against the glass.
We make the plug D of the valve hollow so that the tube C attached to the
base may deliver into the hollow chamber and then through the orifices at the side
and out by a branchpipe E through another regulating cock F when such is made
to work in combination with it.
We make our cock body of any desired form, the plug being also made with its
seating and gland provided for in the usual manner, and we attach one eud
flange G to the boiler for making the connection thereto, while the outlet
branch fange E we attach to the blow off, stop or regulating cock F of any
ordinary form.
When making our improved valve as a combination stop cock and blow off cock
in one casing as shown at Figure 3 so as to dispense with the independent stop cock
or valve we form the spindle of our valve as a screw down valve which closes the
end of the orifice delivering into the hollow chamber of the main plug. Thus
when this main plug H is turned and with it the collecting bent pipe C at its base,
the delivery to the interior of the hollow plug is not made until the interior or
supplementary shut off valve J is withdrawn or screwed up. We make the branch
or outlet of this pipe of any desired form to suit the connection which is to be made
thereto, sometimes making it to connect to a range of piping, or to have a screw
end for a nipple attachment. The body of the combination cock and the ordinary
fittings we make of well known types employed at present for similar purposes.

page_text: Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
1. The construction of blow off cocks for attachment to boilers and for like
purposes, for permitting water, steam, or scum, to be blown through the same
outlet or branch substantially as herein described.
2. In blow off cocks for attachment to boilers and for like purposes, the use of
an internally projecting tube or pipe substantially as and for the purposes.
herein before described and as illustrated in the accompanying drawings.
3. In blow off cocks for attachment to boilers and for like purposes, the
combination of a hollow plug having a shut off valve fitted therein, with an
internally projecting tube or pipe, substantially as and for the purpose herein before
described and as illustrated in the accompanying drawings.
4. The improved general combination and arrangement of blow off cocks and
boiler fittings substantially as and for the purposes herein described.
Dated this 12th day of November 1895.
MARKS & CLERK,
18 Southampton Buildings, London, W.C., and
13 Temple Street, Birmingham, Agents for the Applicants.