Year: 1886

page_text: Date of Application, 28th Sept., 1886
Complete Left, 27th June, 1887.
Complete Accepted, 29th July, 1887.
I, JAMES PITCAIRN HALKET of Glengall Iron Works Millwall in the County
of Middlesex, Engineer, do hereby declare the nature of this invention to be as
follows:-
My invention relates to fittings for water gauges so arranged as to provide facilities
for ascertaining if the passages are clear, and also to provide for automatic closing
of these passages in case of fracture of the glass or other like accident.
For this purpose, in the usual column which is connected by pipes to the upper
and lower parts of a boiler, and on which the glass gauge and test or gauge cocks
are fixed, I provide a cock or valve in a position intermediate between the branches
that lead to the top and bottom of the glass gauge. The attendant, by closing this
intermediate cock or valve and opening one or other of the glass gauge cocks and
its blow out cock, can blow either steam or water through their passages and thus
ascertain if they are clear. I also provide at each end of the column a valve which,
so long as the pressures on both sides of it are equal, remains open, but when, by
fracture of the gauge glass or otherwise the pressure on one side is relieved, the valve
becomes closed. To each of these valves I provide a handle or other means by which
it can be held open for the purpose of testing or cleaning the passages.
Dated this 28th day of September 1886.
ABEL & IMRAY,
Agents for the Applicant.

page_text: I, JAMES PITCAIRN HALKET of Glengall Iron Works Millwall in the County
of Middlesex, 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 :-
My invention relates to fittings for water gauges so arranged as to provide facilities
for ascertaining if the passages are clear, and also to provide for automatic closing
of these passages in case of failure of the glass or other like accident.
For this purpose, in the usual column which is connected by pipes to the upper
and lower parts of a boiler and on which the glass gauge and test or gauge cocks are
fixed, I provide a cock or valve in a position intermediate between the branches
that lead to the top and bottom of the glass gauge. The attendant by closing this
intermediate cock or valve and opening one or other of the glass gauge cocks and its
blow out cock, can blow either steain or water through their passages and thus
ascertain if they are clear. I also provide at each end of the column a valve which
so long as the pressures on both sides of it are equal, remains open, but when by
fracture of the gauge glass or otherwise the pressure on one side is relieved the valve
becomes closed. To each of these valves I provide a handle or other means by which
it can be held open for the purpose of testing or clearing the passages.
In the accompanying drawings I shew various forms of columns A such as used
to receive the glass gauge G and gauge cocks D, the same letters being used to
indicate corresponding parts of the several figures which are as follows. Fig. 1
is a side view. Fig. 2 is a front view. Fig. 3 is a side view partly in section
and Fig. 4 is a back view partly in section of a set of glass gauge and gauge cock
fittings, with my invention applied thereto. Figs. 5 and 6. and Figs. 7 and 8
are respectively side and front views shewing modified forms of the columns connected
at its upper and lower ends with the boiler above and below the water level. In the
column AI introduce a stop cock or valve B, by closing which and opening one
or other of the glass gauge cocks C I can blow either steam or water through
the glass G and through the blow out cock H. In the passages leading to the
column I fit check valves E which in case of a glass breaking, or other accident
releiving the pressure which keeps them unseated automatically close, and I provide
eccentrics F by turning which the valves can be opened in opposition to the boiler
pressure.
The intermediate cock B may be used without the check valves E as shewn in

page_text: Figs. 7 and 8 and in addition thereto a cock K may be applied at the lower inlet
of the column A as shewn in Fig. 5.
Having now particularly described and ascertained the nature of my said invention
and in what manner the same is to be performed I declare that what I claim is :-
1. In the column A to which water gauge fittings are usually applied the use
of a stop cock or valve B substantially as and for the purpose set forth.
2. In the passages from a boiler to the column A the use of check valves E with
eccentrics F or equivalents thereof, for holding them open.
Dated this 97th day of Inna 1887
ABEL & IMRAY,
Agents for the Applicant.