IMPROVEMENTS IN WATER GAUGES FOR BOILERS
Year: 1880

page_text: LETTERS PATENT to James Ellis, of Gun Iron Works, Gun Square, Houndsditch,
in the City of London, Engineer, for an Invention of "IMPROVEMENTS IN
WATER GAUGES FOR BOILERS."
PROVISIONAL SPECIFICATION left by the said James Ellis at the Office
of the Commissioners of Patents on the 14th July 1880.
JAMES ELLIS, of Gun Iron Works, Gun Square, Houndsditch, in the City of
London, Engineer. "IMPROVEMENTS IN WATER GAUGES FOR BOILERS."
This Invention, which relates to those water gauges that are fitted with self
closing valves which act in case of rupture of the gauge glass, consists in forming
a valve.chamber in the upper stuffing box casting directly over the top end of the.
gauge glass instead of a separate chamber between the ordinary stop cock and
gauge glass stuffing box as hitherto done.
This chamber. contains a spherical or other valve, which during ordinary"
working rests upon ribs or pins at the bottom of the chamber, and it is in
equilibrium through the steam pressure from the stop cock acting on the bottom
of it, and the pressure from the lower cock through the gauge glass acting on
the top of it by means of a passage leading from the gauge glass for that.
purpose.
-
An additional passage is formed in the chamber of the upper cock leading from
the ordinary passage through the said cock to the upper portion of the valve
chamber, and is controlled by the cock; this is for the purpose of equilibriating
the valve in the chamber by opening the said passage when it is necessary to blow
through.
In the event of the glass breaking, the equilibrium of the valve is destroyed,
and the pressure of the steam closes the valve by pressing it against a seating in
the top of the chamber.
The lower cock is fitted with a similar chamber and valve, but without the extra
passage before mentioned.
The advantages gained by my Invention are,-
1. The upper passage to the gauge glass does not become closed by the valve
during ordinary working when fitted to boilers, whether stationary, locomotive, or
seagoing.
2. The cock chambers are simplified, and so rendered less costly in manufacture.
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page_text: +
SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said James Ellis in the Great Seal Patent Office on the 14th
January 1881.
JAMES ELLIS, of Gun Iron Works, Gun Square, Houndsditch, in the City of
London, Engineer. "IMPROVEMENTS IN WATER GAUGES FOR BOILERS."
This Invention, which relates to those water. gauges that are fitted with self
closing valves which act in case of rupture of the gauge glass, and is clearly
illustrated in the accompanying Drawings, consists in forming a valve chamber a
in the upper stuffing box casting b directly over the top end of the gauge glass c
instead of a separate chamber between the ordinary stop cock d and gauge glass
stuffing box as hitherto done.
The chamber contains a spherical or other valve e, which during ordinary
working rests upon ribs or pins f at the bottom of the chamber, and it is in
equilibrium through the steam pressure from the stop cock d acting on the bottom
of it, and the pressure from the lower cock 9 through the gauge glass acting on
the top of it by means of a passage h leading from the gauge glass for that
purpose.
An additional passage i is formed in the chamber of the upper cock leading from
the ordinary passage through the said cock to the upper portion of the valve
chamber, and is controlled by the cock; this is for the purpose of equilibriating
the valve in the chamber by opening the said passage when it is necessary to blow
through.
In the event of the glass breaking, the equilibrium of the valves e is destroyed,
and the pressure of the steam closes the valves by pressing them against a seating /
in the top of the chamber a.
The lower cock is fitted with a similar chamber and valve, but without the extra
passage before mentioned.
The advantages gained by my Invention are,-
1. The passage to the gauge glass does not become closed by the valve during
ordinary working when fitted to boilers, whether stationary, locomotive, or