Improvements in Water-gauge Fittings for High Pressure Steam Boilers, Reservoirs, and the like.
Year: 1899

page_text: Date of Application, 26th Jan., 1899-Accepted, 4th Mar., 1899
COMPLETE SPECIFICATION.
Improvements in Water-gauge Fittings for High Pressure Steam
Boilers, Reservoirs, and the like.
We, HENRY BURNETT WATSON and JOHN STANLEY WATSON, of High Bridge
Works, in the City and County of Newcastle-on-Tyne, Engineers, do hereby
declare the nature of this invention and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement:-
This invention relates to water-gauge fittings of the kind described in the
Specification to Letters Patent No. 13123 of 1896 granted to the present applicants,
and the object is to improve the apparatus as described in the said specification in
order to overcome certain difficulties experienced in connection therewith.
We have illustrated our invention in the accompanying drawings in which
Fig. 1 is a front elevation, Fig. 2 a side elevation partly in section on the
line, of Fig. 1, and Fig. 3 is a transverse section on the line y, y of Fig. 1;
in the drawings the same parts are indicated by the same letters of reference, and
the directions in which the sections are viewed are indicated by the small arrows
adjacent to the letters which denote the planes of section.
We have found in connection with our prior invention referred to, that the
steam by which the gauge glass is surrounded is liable to condense on the
transparent surfaces and so interfere with the clear view of the water level in the
gauge glass, and with the object of overcoming this difficulty, we in the present
invention surround the gauge glass with pure hot water which is in communication
with the steam space of the boiler, reservoir or the like, the arrangement of the
fitting and the connections being as follows:-
The gauge glass G is connected to the steam and water spaces of the boiler by
cocks A and A¹ respectively, and a blow-through cock F¹ is provided, the glass
being packed in the manner indicated or in any other suitable and convenient
manner.
In order however to protect the gauge glass, we surround it by a casing formed
with side pieces D and talc windows F, the latter being jointed to the sides D
by means of the plates E and through bolts b, the joints being made staunch with,
say two plies of asbestos.
The space S between the casing and the gauge glass is filled with hot pure water
which is formed by the condensation of steam admitted through the cock H from
the boiler, and as this water is in communication with the steam space of the boiler,
the gauge glass is maintained at a constant temperature and in a condition of
equilibrium; moreover, as the space is entirely filled with clear water there is
no interference with the clear view of the gauge glass which is so essential in
apparatus of this class.
We find that plates of tale of about one sixteenth of an inch in thickness are
sufficiently strong, in the case of ordinary pressures, to provide for windows of
about half an inch wide.

page_text: A drain cock I, which is kept normally shut, may be provided so that the 'water
may be renewed from time to time.
It is to be understood, of course, that the form of the apparatus which we have
illustrated is only intended to be typical of the construction which may be adopted,
and that no claim is made herein to any of the features of the invention disclosed
in our prior specification referred to.
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). A water-gauge fitting for steam boilers, reservoirs and the like, in which the
gauge glass is surrounded by a casing having transparent windows, the space
between the gauge glass and the casing being filled with water in communication
with the steam space of the boiler, reservoir or the like; substantially as described
and illustrated.
(2). A water-gauge fitting for steam boilers, reservoirs and the like, in which the
gauge glass is surrounded by a metallic casing provided with windows of thin
plates of talc, the space between the gauge glass and the casing being filled with
water in communication with the steam space of the boiler, reservoir or the like;
-substantially as described and illustrated.
(3). The combination and arrangement of parts forming the improved water-
gauge fitting for steam boilers, reservoir and the like; substantially as described
and illustrated.
Dated the 5541 Jose of
1000
SLOAN & LLOYD BARNES,
Chartered Patent Agents, 34, Castle Street, Liverpool.