IMPROVEMENTS IN SAFETY-VALVES FOR WATER-HEATING APPARATUS."
Year: 1881

page_text: LETTERS PATENT to Joseph Challender, of Manchester, in the County of
Lancaster, Plumber, for an Invention of "IMPROVEMENTS IN SAFETY-VALVES
FOR WATER-HEATING APPARATUS."
PROVISIONAL SPECIFICATION left by the said Joseph Challender at the
Office of the Commissioners of Patents on the 22nd September 1881.
JOSEPH CHALLENDER, of Manchester, in the County of Lancaster, Plumber.
"IMPROVEMENTS IN SAFETY-VALVES FOR WATER-HEATING APPARATUS.'
My Invention relates to the safety valves which are more particularly adapted
for application to range boilers, and to hot water cylinders. Such valves are
usually loaded with a dead weight, and are formed to discharge, in an upward
direction, any water or steam which may escape from the valve. In apparatus
constructed in accordance with my Invention, I form a channel or receiver around
the central pillar of the valve, and I form the weight shell without upper openings,
so that the escaping water is directed downwards into the said channel. An
opening on the side of the channel is provided with a bib or spont, which curves
outwards and downwards so as to discharge the water in a downward direction
into or on to the fire. I prefer that the said bib shall be splayed out so as to
terminate in a long and narrow mouth. In cases wherein the valve is enclosed by
brick work, the mouth of the said bib extends through to the front of such brick-
work. The lower part of the weight shell is formed to cover and enclose the said
channel so as to exclude soot or dirt therefrom. In order to provide against the
formation of a vacuum within the boiler or hot water apparatus, I provide the
safety valve with one, two, three, or more small inlet valves.
In one arrange-
ment the said air inlet valves are scated in a flanch which is formed on the part
which screws on to the nipple, which is on the boiler, or which is otherwise
attached to the boiler, a flanch, formed on the underside of the part in which the
aforesaid channel is formed, being screwed on to the first named flanch. I prefer
to form the valve to screw into its place from the outside of the shell so that it can
be readily withdrawn.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Joseph Challender in the Great Seal Patent Office on the 15th
March 1882.
JOSEPH CHALLENDER, of Manchester, in the County of Lancaster, Plumber.
"IMPROVEMENTS IN SAFETY-VALVES FOR WATER-HEATING APPARATUS."
My Invention relates to the safety valves which are more particularly adapted
for application to range boilers and hot water cylinders. Such valves are usually
loaded with a dead weight, and are formed to discharge in an upward direction any
water or steam which may escape from the valvo.
My Invention consists in constructing a valve with a channel or cup around the
central pillar of the said valve, and with a weighted shell or cap without upper
openings, so that the escaping steam or water is directed downward into the said
channel or cup. An opening in the side of the said channel or cup is provided
with a spout which curves outward and downward, through which the steam or
water is discharged in a downward direction on to the fire. I prefer that the said
spout shall be splayed out so as to terminate in a long and narrow mouth. In
cases wherein the valve is enclosed by brickwork, the mouth of the said spout
extends through to the front of such brick work. The lower part of the weighted
shell is formed to cover and enclose the said channel or cup so as to exclude soot or
dirt therefrom.
My Invention further consists in providing the said valve with one or more
lifting air-inlet valves so as to prevent the formation of a vacuum within the boiler
or hot water apparatus. The said air-inlet valves are seated in a flange formed on
the part which screws on the nipple which is on the boiler, or which is otherwiso
attached to the said boiler, the underside of the aforesaid cup or channel forming a
flange which screws on the first named flange. I prefer to form the valve to screw
into its place from the outside of the shell so that it can be readily withdrawn.

page_text: furnish the valve with one or more lifting air-inlet valves I. These air-inlet
valves are scated in the portion D which is screwed to the nipple on the boiler,
and the said air-inlet valves are so arranged that when the upper portion of tho
valve (consisting of the central pillar A, channel or cup B, and spout H) is screwed
to the portion D, the under surface of the channel or cup B is at such a distance
from the said air-inlet valves I, as that while it admits of the requisite upward
movement of the said valves I, it prevents their being displaced or jerked out of
their seats.
In witness whereof, I, the said Joseph Challender have hereunto set my hand
and seal, this Eleventh day of March, in the year of Our Lord One thousand
eight hundred and eighty two.
JOSEPH CHALLENDER. (L.S.)