IMPROVEMENTS IN TAPS AND VALVES
Year: 1884

page_text: I JOHN BLACKBURN of Bushey in the County of Hertfordshire do hereby
declare the nature of the said Invention for "IMPROVEMENTS IN TAPS AND
VALVES" to be as follows
My Improvements in taps and valves consist in constructing the same in such a
manner that the water may be cut off whenever required and the maximum
amount of supply adjusted without having recourse to the valve in the main,
For this purpose a conical hollow plug is inserted in the opposite side of the shell
to that of the valve spindle.
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In this plug a lateral opening is formed which when the valve is in use, affords
a clear passage for the water, but the plug being ground to fit the shell and secured
by packing and gland, it is capable of revolving, and 'the size of the opening may
be reduced or it may be entirely closed if required. Thus whenever it is desirable
to remove the valve spindle, either for the purpose of grinding the seat, renewing
a washer or other repairs, it is merely necessary to turn the conical plug until the
liquid or steam ceases to flow, when the cover and spindle may be entirely removed.
This valve is particularly applicable for domestic purposes where several branches
are supplied from one main, especially if connected to circulating hot water
apparatus in which it is dangerous to close a main valve when the boiler is at work.
It is also applicable to ball valves.
J Gj

page_text: COMPLETE SPECIFICATION,
I, JOHN BLACKBURN, of Bushey in the County of Hertfordshire do hereby
declare the nature of the said Invention for "IMPROVEMENTS IN TAPS AND
VALVES" and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement :-
My Improvements in taps and valves consist in constructing the same in such
a manner that the water may be cut off whenever required, and the maximum
amount of supply adjusted without having recourse to the valve in the main.
For this purpose a conical hollow plug is inserted in the opposite side of the shell
to that of the valve spindle. In this plug a lateral opening is formed which when
the valve is in use, affords a clear passage for the water, but the plug being ground
to fit the shell and secured by packing and gland, it is capable of revolving and
the size of the opening may be reduced or it may be entirely closed if required.
Thus whenever it is desirable to remove the valve spindle, either for the purpose of
grinding the seat, renewing the washer, or other repairs it is merely necessary to
turn the conical plug until the liquid or steam ceases to flow when the cover and
spindle may be entirely removed.
"
This Invention is particularly applicable to valves for domestic purposes, where
several branches are supplied from one main especially if connected to circulating
hot water apparatus in which it is dangerous to close the main valve when the
boiler is at work. It is also applicable to ball valves and steam valves.
In order that my Invention may be more clearly understood, I herein give
reference to the accompanying sheet of drawings, which illustrates its application
to some of the taps and valves in common use.
Figure 1 represents an ordinary steam or water valve with conical seating,
Figures 2 and 3 are different forms of service taps, and Figure 4 is a ball valve.
In every Figure the letter A denotes the shell, B the spindle, C the valve
and D the seat, the direction of the flow of water being indicated by arrows.
E represents the conical hollow plug which constitutes my Invention.
This plug is inserted opposite to the valve spindle and in the same axial line,
and an opening F is formed in one side thereof large enough to provide the usual
water-way when so placed that the edges of the opening in the plug correspond
with the edges of the inlet-If however it is desired to limit the possible flow of
water, the plug may be turned partially round by means of a key fitted on to the
square, spindle G and if it is necessary to remove the principal valve for the
purpose of grinding the seat or fitting on a new washer, the plug may be turned
so as to cut off the supply entirely. The plug being taper is capable of being
tightened by the gland H and as it will seldom be called into requisition, the wear
will be so trifling that it will last almost as long as the valve, without ever being
removed. The construction of shell also is attended with very little extra expense.
Having thus particularly described and ascertained the nature of my said
Invention and the manner in which the same is or may be used or carried into
effect, I would observe in conclusion that what I claim is :-
The construction of taps and valves provided with a plug E, substantially as and
for the purpose herein shewn and described.
Dated this 4th don of Daha 700