Improvements in Cocks for Water Gauges.
Year: 1895

page_text: Date of Application. 16th Sept., 1895.
Complete Specification Left, 8th June, 1896-Accepted, 12th Sept., 1896.
PROVISIONAL SPECIFICATION.
Improvements in Cocks for Water Gauges.
I, CLAUDE KENNEDY MILLS, of 23 Southampton Buildings, in. the County of
London, Patent Agent, do hereby declare, the nature of this invention.(a .communi-
cation to me from Messieurs Thevenin. Frères,& Cie., of Lyons, in the Republic
of France, Founders,) to be as follows:-
Experience has shown that cocks of water gauges with, automatic, closing means,
the closing means of which, valves or balls, remain at rest so long as the foreseen
accident (the breaking of the glass) does not take place, are often rendered useless
by the incrustation of these means at the moment when they should act.
The essential character of the cock which constitutes the object of the present
application is the utilisation, for the automatic closing, of the means itself which
serves for the opening and closing of the gauge in ordinary working. The daily
working of this means prevents its incrustation and its working is assured in case
of breakage of the glass.
The arrangement which the inventors, have adopted presents in addition other
advantages which the following description will set forth:
The accompanying drawing represents in section at Fig. 1 a complete water
gauge constructed according to the present invention. The two cocks R R ouly
differ from ordinary cocks by the addition to the lower cock of the blow off
tap P.
The closing means is composed of two concentric-valves. A B. The larger
one A, which is entirely free, has a hard bronze seat C placed in. the base of the
tap; it is kept open by a bronze. spring E. The little valve. B: closes the central
opening of the larger valve A; its rod D traverses this opening with sufficient play
to allow a little steam or water to pass therethrough, when, the valve A being
closed, the valve B remains nevertheless open..
The valve B is worked by a screw connected to the..rod. D by a coupling
arrangement G, which does not transmit to it its rotary motion. The screw F
passes through a stuffing box and is provided with a handle H.
Suppose the cock is closed, that is to say, the two valves are pressed upon their
seats where they are held by the interior pressure of the boiler. In.order to open
it the handle H will be turned to the right so as to open the valve B, as shown..in
Fig. 2; the steam or water will flow through-the opening.in. the valve A owing to
the play existing around the rod D, until the valve A, being between. two. equal
pressures, will be pushed back by its spring and will completely.open the cock.
If in this position the breaking of the glass takes place, the equilibrium. being
broken, a sudden current will force the valve A upon its seat and will thus cause
the cock to be closed, as shown in Fig. 2. This closing is not absolutely complete
because the valve B remains open, but. the small quantity of water. and. steam
which escapes owing to the play of-the-rod. D.cannot-cause any.danger, and..it
serves on the contrary as a warning, to the engineer who cau. easily complete the
closing by hand and replace the broken glass.
It will be noticed that in opening the cock, the screw. F; acting only upon the
small valve B, requires but little effort to operate.it; so far as closing is concerned
it is operated and held by the interior pressure of the boiler. and does not require
any help from the screw. The working-of the-cocks-is. therefore.. very easy, and
the closing perfectly tight.

page_text: The blow-off cock works according to the same principle and with the same
advantages, its valve I, of small dimensions, opens from the exterior inwards ani
is held closed by the interior pressure upon a seat L.
The valve I is provided with a hollow guide J serving for the flow of the
water and steam which enter into it by small holes arranged underneath the
valve.
The opening is effected by the nut K formed with a handle which screws upon
the fixed part L and surrounds the rod J in a groove formed by the nuts M.
The bodies R R₁ of the cocks are, as shown, screwed together upon the
sockets o o¹ fixed to the boiler, which enables the dismounting and cleaning of all
the parts whilst leaving these sockets in position.
It will be understood that the arrangements described and represented in the
present application may be varied in detail according to the applications of the
apparatus.
Dated this 16th day of September 1895.
HARRIS & MILLS,
23 Southampton Buildings, Loudon, W.C., Agents.
Improvements in Cocks for Water Gauges.
I, CLAUDE KENNEDY MILLS, of 23 Southampton Buildings, in the County of
London, Patent Agent, do hereby declare the nature of this invention, a com-
munication to me from Messieurs Thevenin Frères & Cie. of Lyons in the
Republic of France, Founders, and in what manner the same is to be performed
to be particularly described and ascertained in and by the following statement :--
Experience has shown that cocks of water gauges with automatic closing
means, the closing means of which, valves or balls, remain at rest so long as the
foreseen accident (the breaking of the glass) does not take place, are often
rendered useless by the incrustation of these means at the moment when they
■hould act.
The essential character of the cock which constitutes the object of the present
application is the utilization for the automatic closing of the means itself, which
serves for the opening and closing of the gauge in ordinary working.
The daily working of this incans, prevents its incrustation and its working is
assured in case of breakage of the glass.
The arrangement which the inventor has adopted presents in addition other
advantages which the following description will set forth.
The drawing accompanying my Provisional Specification represents in section
at Figure 1, a complete water gauge constructed according to the present
invention. The two cocks R. R¹ differ only by the addition to the lower cock of
the blow off tap P.
The closing means is composed of two concentric valves A. B. The larger
one A which is entirely free has a hard bronze seat C placed in the base of the
tap, it is kept open by a bronze spring E. The little valve B closes the central
opening of the larger valve A, its rod D, traverses this opening with sufficient
play to allow a little steam or water to pass therethrough when the valve A being
closed as shown at Fig. 2, the valve B remains nevertheless open.
The valve B is worked by a screw F connected to the rod D by a coupling
arrangement G which does not transmit to it its rotary motion. The screw F,
passes out through a stuffing box and is provided with a handle H.
Suppose the cock is closed, that is to say the two valves are pressed upon their
seats, where they are held by the interior pressure of the boiler, in order to open
it the handle H will be turned to the right so as to open the valve B, as shown in

page_text: Fig. 2, the steam or water will flow through the opening in the valve A owing to
the play existing around the rod D, until the valve A being between two equal
pressures will be pushed back by its spring and will completely open the cock.
If in this position the breaking of the glass takes place, the equilibrium of
pressure being broken, a powerful current will force the valve A upon its seat and
will thus cause the tap to be closed as shown in Fig. 2. This closing is not.
absolutely complete because the valve B remains open, but the small quantity of
water and steam which escapes owing to the very small play of the rod D, cannot
cause any danger and it serves on the contrary as a warning to the engineer who
can easily complete the closing by hand and replace the broken glass.
It will be noticed that in opening the tap, the screw F acting only upon the
small valve B requires but little effort to operate it; so far as closing is concerned,
it is operated and maintained by the interior pressure of the boiler and does not
The working of the cocks is therefore very easy
require any help from the screw.
and the closing perfectly tight.
The blow off cock P has a valve I, of small dimensions, which opens from the
exterior inwards, and is held closed by the interior pressure upon a seat L.
The valve I is provided with a hollow guide J, serving for the flow of the water
and steam which enter it by small holes arranged underneath the valve.
The opening is effected by the nut K formed with a handle, which screws upon
the fixed part L. and surrounds the rod J in a groove closed by the nuts M..
The bodies R R¹ of the cocks are as shown screwed together upon the
Bockets O. O' fixed to the boiler, which enables the dismounting and cleaning of
all the parts whilst leaving these sockets in position.
It will be understood that the arrangements herein described and represented
may be varied in detail according to the applications of the apparatus.
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. A new water gauge cock in which the opening and closing, during the normal
working thereof, are obtained by means of two concentric valves having a slight
play between them, the smaller of these valves opening by a screw, and securing
upon the two faces of the larger an equilibrium of pressure which forces it to open
under the action of a spring, whereby in case of breakage of the tube, this
equilibrium being broken, the larger valve is closed, leaving only a slight escape,.
which warns the engineer without interfering with the complete closing of the cock
substantially as herein set forth.
2. The improved water gauge cocks constructed and operating substantially as.
herein set forth.
ليم
1000
HARRIS & MILLS,
23 Southampton Buildings, London, W.C., Agents.