Improved Safety Tap for Kitchen Boilers.
Year: 1895

page_text: Date of Application, 30th Jan., 1895
Complete Specification Left, 8th Mar., 1895-Accepted, 20th Apr., 1895
Improved Safety Tap for Kitchen Boilers.
GEORGE LOVE, Malton House, Quebec, Durham Engineer BRODIE COCHRANE,
Aldin Grange, Durham Mining Engineer do hereby declare the nature of this
invention to be as follows:-
The object of the invention is to provide a tap that can be used for ordinary
domestic purposes & which will act as a safety valve in case of extra or over
pressure. To carry our improvements into effect, we provide a tap with a valve so
arranged that the valve may be opened to allow a flow of water through the tap
when required for any purpose. This valve is held in position by means of a
weight or spring so adjusted & regulated that under ordinary or normal pressure,
the valve is held in a close position but as soon as an extra pressure is generated
or caused, the valve is opened & gives relief or vent to the extra pressure in the
boiler.
GEORGE LOVE.
BRODIE COCHRANE.
We, GEORGE LOVE, Engineer, of Malton House Quebec near Durham and
BRODIE COCHRANE, Mining Engineer, of Aldin Grange, Durham both in the
County of Durham, 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 an improved safety tap for kitchen boilers and has for
its object the construction of a tap that can be used for ordinary domestic purposes
and which will also act as a safety valve in cases of extra pressure arising within
the boiler from any cause.
In carrying our invention into effect we provide a tap with a valve so arranged
that it may be readily opened to allow a flow of water through it when required
for any purpose.
This valve is held in position by means of a weight or spring so adjusted and
regulated that under ordinary or normal pressure the valve is held in a closed
position but as soon as from any cause an extra pressure is caused or generated the
valve will open and thus give relief to the extra pressure in the boiler.
We will fully describe our invention with reference to the accompanying
drawings in which Figures 1, 2 and 3 show in sectional elevational views three
modifications or different modes of effecting our purpose and in the following
description like marks of reference designate like parts.
Referring to the drawings B represents a plate of the boiler near the bottom of
which our improved safety tap and valve may be secured. Within the tap we
provide a valve V on a spindle S as shown; the upper end of the spindle is
Rollers R may
operated by a lever L hinged at L' and weighted as shown at W.

page_text: be provided to facilitate the working of the lever in the upper end of the spindle.
T is the outflow of the tap.
Instead of a weighted lever as shown in Figure 1 we may effect the same result
by introducing a spring S' as shown in Figures 2 and 3 so that the valve can only
lift in opposition to the pressure of the spring to which access can be had by
removing the cover C.
In Figures 2 and 3 two different types of lever are shown for operating the
valve. In each case it will be understood that the pressure due to the lever and
weight or to the springs with regard to the valve will be such as to maintain
the valve tight on its seat under the normal hydraulic pressure or head acting
under the valve and tending to open it and only when any extraordinary pressure is
applied or generated as described will the valve lift automatically to relieve such
pressure.
It will thus be seen that the tap acts both as an ordinary tap for domestic
purposes as well as a safety valve and it has this great advantage that whereas
ordinary safety valves as applied to kitchen boilers are comparatively seldom
actually required in practice they therefore are very apt to get out of repairs and
fail to act when required but in our improved combined tap and safety valve
the valve is continually in use for ordinary purposes and therefore there is no risk
of failure of action when required in an emergency necessitating its action as an
ordinary safety valve.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claim is :-
1. The improved combined tap and safety valve for kitchen boilers the several
parts of which are arranged constructed and adapted to work substantially in the
manner and for the purposes herein described and illustrated in Figures 1, 2 and 3
of the drawings.
2. A combined tap and safety valve in which the valve is held on its seat by a
weighted lever or by spring pressure and there retained until raised manually for
domestic purposes or to automatically relieve any extraordinary pressure within
the boiler substantially as herein set forth.
Dated this 7th day of March 1895.
A. CRAWHALL CHAPMAN,
3, St. Nicholas Buildings, Newcastle-on-Tyne, Patent Agent.