Improvements in or Applicable to Water Gauges for Steam Boilers or other Purposes.
Year: 1889

page_text: Date of Application, 10th Aug., 1889
Complete Specification Left, 12th May, 1890-Accepted, 26th July, 1890
RUTIDIONAL DIECIFICATION,
Improvements in or Applicable to Water Gauges for Steam Boilers
or other Purposes.
33
I, JOHN CAMERON of S.S. "6 Finbar Liverpool, Engineer, do hereby declare the
nature of this invention to be as follows:-
This invention has for its object a water gauge which shall be simpler in construction,
have less liability to cause damage in case of the fracture of the glass, and in other
ways superior to those at present in use.
The cocks leading from the boiler I form with a parallel barrel packed with
asbestos or equivalent material in a peculiar manner, ris. parallel to the barrel. On
each side in the body of the cock I construct one or more chambers. These chambers
are open at the end or ends to screw glands or caps and have ports from them leading
to the surface of the barrel. The asbestos is packed into these chambers and by
screwing down the caps or glands, is forced into the ports against the barrel. The valves
above and below the water gauge are formed in a peculiar manner. One of these I
forin with a conical orifice. The smaller end of this orifice being nearest the boiler,
consequently the admission to the glass gauge is throttled or reduced but is not shut
off by the automatic or hand closing of the valve. The valve at the other end of the
water gauge is preferably a segment of a ball on a spindle. This spindle slides freely
in a hole in another spindle at right angles thereto in such manner that it can fly up
against the seat on the occasion of a fracture and yet by simply turning the second
spindle round the ball face of the valve can be removed entirely from the seat so that
it is incapable of flying up against it. The second spindle carrying this ball valve is
formed with a groove in which a pin works or other collars or stops so as to prevent
the spindle from having any movement in the direction of its own axis while free to
turn on its own axis.
Dated this ath day of 1000
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Patent Agents for the Applicant.

page_text: b
In these A is a portion of the shell of a boiler, B one of the cocks leading from the
boiler with steam or water way & having a parallel barrel 61 in which a parallel valve
plug C, operated by a bandle, such as c', is fitted. On each side of the barrel, and
between it and the body of the cock, I form one or more chambers 62. These chambers
are open at one or both ends to screw glands or caps, and have ports 63 from them
leading to the internal surface of the barrel b¹. Into these chainbers (which are shown
in the drawings open at one end only) the asbestos or equivalent material is packed,
and by screwing down the cap D, is forced into the ports against the valve plug C.
The plug C and barrel can be tapered if desired instead of being made parallel.
One great advantage of making cocks in this way is that the valve plug can be taken
out and examined without displacing or removing the packing which remains intact
in the ports, and there is no trouble involved or skill required in renewing the
packing.
The valves above and below the water gauge are formed in a peculiar manner. One
of these valves, preferably the top one, inay be formed with a conical orifice, with the
smaller end thereof nearest to the boiler, through which steam can pass at all times
into the gauge but is throttled or reduced in the passage, so that if the glass break
the escape of steam is not of such volume as to prevent the man in charge from closing
the cock which shuts off the supply. The said valve is adapted to be lifted from its
seat when required to admit a large body of steam being blown through to clean
the gauge or reinove obstructions, etcetera. The valve D¹ on the spindle at the
other end of the water gauge is of a mushroom or other suitable shape. This
spindle slides freely in a hole in another spindle E at right angles thereto, in such
manner that it can fly up against the seat on the occasion of a fracture of the
gauge glass, and yet by simply turning round the spindle E, the mushroom face of
the valve can be removed entirely from the seat so that it is incapable of flying
up against it.
The spindle E carrying the mushroom valve is formed with a
groove which is engaged by the pin e in the stuffing box nut F or in other suit-
able manner so as to prevent the spindle E from having any movement in the
direction of its own axis while free to turn on its own axis.
The advantages of the automatic valve are, that it cannot be accidentally closed
without the knowledge of the man in charge and yet it is instantly lifted to its
seat when the gauge glass is broken, by the force of the escaping water or steam.
The valve can be turned round into such positions in the chamber that all the
working parts can be thoroughly cleaned, when the blow through is opened, from any
accumulated sediment and this avoids the trouble of removing the valve for cleaning,
which is an important consideration.
A slight modification in construction of the packed cock is shewn in Figure 4,
in which the barrel is formed in one with the valve plug C, and the space
between each is filled with asbestos or other suitable packing, which is forced
through ports against the internal surface of the cock body B, by screwing down the
gland B
Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is
1. In combination with a water gauge for steam boilers, an automatic shut off valve
so arranged that if the glass breaks, the force of the steam or water impinging against
it, shall force it against a valve seat, and so prevent the escape of steam or water
until the connection with the boiler is cut off, and a rotatable spindle at right angles
to the valve stem and within which the latter is mounted in such manner, that by
simply rotating the said spindle, the face of the valve can be removed entirely from its
seat, substantially as and for the purposes described.
2. A steam or water cock applicable for water gauges or other purposes in which
the plug or the shell of the cock is formed with an annular chamber or barrel, open
at one or both ends to a screw cap or gland, and having ports or orifices through which
asbestos or equivalent material packed within said barrel, can be forced and compressed

page_text: against the plug or shell, by screwing down one or both of the caps or glands afore-
said substantially as and for the purpose described.
3. The automatic shut off valve water gauge as a whole, substantially as herein
described and illustrated on the accompanying drawings.
n
BOTO AUTO day of my 1990.
JOHN CAMERON.
Wm. P. Thompson & Co.,
Of Liverpool, Manchester, and London, Patent Agents.