Improvements in Water-gauge Fittings for High Pressure Steam Boilers, Reservoirs, and the like.
Year: 1896

page_text: Date of Application, 15th June, 1896-Accepted, 15th Aug., 1896
COMPLETE SPECIFICATION.
Improvements in Water-gauge Fittings for High Pressure Steam
Boilers, Reservoirs, and the like.
We HENRY BURNETT WATSON, and JOHN STANLEY WATSON, Engineers, of
High Bridge Works, in the City and County of Newcastle-on-Tyne 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 improvements in water-gauge fittings for high pressure
steam boilers reservoirs and the like and consists in the provision around the
gauge glass of a stean space enclosed or partially enclosed by a transparent
jacket as hereinafter described whereby the glass can be kept in a more constant
temperature and be in a condition of equilibrium.
In the accompanying drawings Figure 1 shows a front elevational view and
Figure 2 a side elevational view partly in section; Figure 3 shows an half vertical
sectional view at the lower end of the apparatus and Figure 4 a cross-sectional
view as hereinafter described and in the following description like letters of
reference designate like parts.
Referring to the drawings the gauge glass G is shown partially enclosed by the
inner walls of the metallic casing D and at the front and back the plates E which
are bolted to the part D by bolts 6 and formed as shown serve to retain in position
the transparent talc plates F the marginal joints of which may be made with two
plies of asbestos.
S is a steam space surrounding the gauge glass and when in use the level of
water in the glass can be readily seen through the talc windows F.
For a width of window or opening such as is shown of about half an inch a
thickness of about one sixteenth inch of talc will be found sufficient for all
ordinary pressures.
At H there may be a steam supply cock to the jacket space S and at I a drain
cock therefrom.
There may be packing glands P (see Figure 3) at both ends of glass or only at
the lower end as shown. When no upper packing gland is used then the steam
can reach the space S from upper cock A past the outer edges at the upper end
of the glass.
F is a blow-through gauge cock.
AA are the cocks connecting the gauge glass with the boiler.
B and C are the intermediate connections for joining the talc casing with the
top and bottom cocks.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
1. A water-gauge in which the gauge glass is arranged so as to be surrounded
by a steam jacket the casing of which is partially formed of thin transparent talc
sheets the several parts being arranged or adapted for use substantially as and for
the purposes herein described and illustrated

page_text: 2. The general arrangement or combination of parts constituting the improve-
ments in water-gauge fittings substantially as and for the purposes herein
described and illustrated.
Dated this 16th day of July 1896.
A. CRAWHALL CHAPMAN,
3 St. Nicholas Buildings, Newcastle-on-Tyne, Patent Agent.