A Combined Safety valve and water Tap.
Year: 1895

page_text: A Combined Safety valve and water Tap.
'I, JOHN ABBOTT, of " Clougheast," Silverdale Road, Eastbourne, in the County
of Sussex, Engineer, do hereby declare the nature of this invention to be as
follows:-
The present invention relates to a combined safety valve and water tap which is
especially applicable for use on kitchen boilers, such apparatus enabling water or
other liquid to be drawn off when desired, while at same time it is always ready.to
act automatically as a safety valve to allow steam to escape when the pressure in
the boiler becomes excessive, thus effectually preventing explosions.
The apparatus is in the form of an ordinary tap and the passage through which
the liquid and steam, passes on its way to the outlet is provided with a seat for a
valve serving to normally close such passage. This valve is formed on the end of
a spindle which projects through the casing of the tap, so that it can work freely
through such casing and is provided with means for raising and lowering same.
A spring surrounding the valve spindle is confined between the top of the valve
and the cap of the casing, so as to offer opposition to the raising of the valve, but
allowing same.to do so against the action of the spring under excessive pressure.
An inverted cup or thimble of vulcanized india-rubber or other suitable material
surrounds the valve spindle, its lower end forming a water-tight joint on the top of
the valve, while its upper end forms a water-tight joint with the casing of the tap,
so that water or steam is prevented from passing out by the opening through which
the valve spindle works." At the same time such cup or thimble prevents the
possible accumulation of dirt or sediment round the spring, which might otherwise
interfere with its action.
As the valve is raised whenever it is necessary to draw off water all risk.of-such
valve becoming set or fixed by long periods of non-action as a safety valve is
avoided, so that it will always be ready to act as a safety valve in case of
necessity.
Any suitable.means may be employed for raising the valve in order to draw off
the water when required. For this purpose the outer end oftthe valve spindle may
be screw threaded and a screw hand wheel be mounted thereon outside the tap
casing. Or the spindle may be weighted or acted upon by a weighted or spring-
actuated lever. Or again a hand lever may be used for raising and lowering the
valve spindle.
Dated this 3rd day of July 100%
ALLISON BROS.,
Agents for the Applicant..

page_text: I, JOHN ABBOTT, of "Clougheast," Silverdale Road, Eastbourne, in the County
of Sussex, 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 :-
The present invention relates to a combined safety valve and water tap which is
especially applicable for use on kitchen boilers, such apparatus enabling water or
other liquid to be drawn off when desired, while at same time it is always ready to
act automatically as a safety valve to allow steam to escape when the pressure
in the boiler becomes excessive, thus effectually preventing explosions.
In order to enable my invention to be fully understood I will now proceed to
describe same by the aid of the accompanying drawing which shows a longitudinal
section of a suitable construction for carrying such invention into effect.
The apparatus is in the form of an ordinary tap of which A is the casing of the
tap and in the passage B thereof through which the liquid and steam passes on its
way to the outlet C, a seat D is formed for the valve E which normally closes such
passage. This valve E is formed on the lower end of the spindle F projecting
through the casing A, so that it can work freely through such casing, the opening
in which is closed by the screw cap G. The outer end of the spindle F is provided
with any suitable means for raising and lowering same, the arrangement shown in
the drawing consisting in making the end of the spindle F screw-threaded and
mounting a screw hand wheel H thereon outside the tap casing. The top of
spindle F is preferably provided with a bolt K screwed into such spindle, and the
head of which projects beyond the spindle so as to prevent the hand wheel H
working off the latter.
Or, instead of being provided with the hand wheel H such spindle might be
weighted or acted upon by a weight or spring actuated lever; or again a hand lever
might be used for raising and lowering the valve spindle.
A spring I surrounding the valve spindle F is confined between the top of the
valve E and the screw cap G of the casing A, so as to offer opposition to the
raising of the valve, but allowing same to do so against the action of the spring
under excessive pressure. A cup or thimble L of vulcanized india-rubber or other
suitable material surrounds the valve spindle F', its lower end forming a water-tight
joint on the top of valve E, while its upper end forms a water-tight joint with
the casing A, so that water or steam is prevented from passing out by the
opening through which the valve spindle works. At the same time the cup or
thimble L prevents the possible accumulation of dirt or sediment round the spring I,
which might otherwise interfere with its action. By raising the spindle Fit will
be seen that valve E will be lifted from its seat D and the passage B will consequently
be opened to allow the liquid and steam to pass freely through the tap. By lowering
spindle F the valve E will be forced to its seat D and passage B consequently
closed. But in case of any excessive pressure occurring, such pressure will by
acting on the under side of the valve E raise same from its seat D against the action
of spring and thus relieve the pressure, after which spring I will automatically
close the valve again.
As the valve E is raised whenever it is necessary to draw off water all risk of
such valve becoming set or fixed by long periods of non-action as a safety valve
is avoided, so that it will always be ready to act as a safety valve in case of
necessity.

page_text: Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. The combined safety valve and water tap consisting in a valve formed on a
spindle which is provided with means for raising and lowering such valve from and
to its seat in the passage through which the liquid and steam are to pass, such
valve being acted upon by a spring tending to normally close the passage, but which
under excessive pressure will yield and open the latter, all substantially as and for
the purpose specified.
2. The combination with the combined safety valve and water tap of the
construction set forth in the preceding claim, of a flexible cup or thimble sur-
rounding the valve spindle and spring and forming a water-tight joint with the valve
and also with the tap casing, substantially as and for the purpose specified.
Dated this 23rd day of August 1895.
ALLISON BROS.,
Agents for the Applicant.