AN IMPROVED VALVE-COCK
Year: 1882

page_text: LETTERS PATENT to William Robert Lake of the Firm of Haseltine Lake
& Co. Patent Agents, Southampton Buildings, London, for an Invention of
"AN IMPROVED VALVE-COCK." A communication from abroad by Ambroise
Bénoist, of Paris, France.
PROVISIONAL SPECIFICATION left by the said William Robert Lake at
the Office of the Commissioners of Patents on the 14th February 1882.
WILLIAM ROBERT LAKE, of the Firm of Haseltine Lake and Co. Patent Agents,
Southampton Buildings London. "AN IMPROVED VALVE-COCK." [A communication
from abroad by Ambroise Bénoist, of Paris, France.]
This Invention relates to an improved valve-cock, in which the valve is not
attached to the rod for operating it.
In valve-cocks hitherto made, the valve forms a part of, or is fixed to, the rod
for opening and closing it, and the valve is brought to its seat either by with-
drawing the rod, or by pushing it in; the consequence of this rigid connection is
that, if the construction of the valve-cock is not perfect, the valve does not fit
exactly upon its seat, and the cock leaks, which causes annoyance, particularly in
locomotive surface. It also frequently happens, especially in gun metal cocks, that
the valve comes off and is thus rendered useless.
The object of this Invention is to overcome these inconveniences and is chiefly
effected by making the valve independent of the rod; the valve is kept against
its seat simply by the pressure of the fluid, and is opened by pushing in the rod.
According to this Invention the body of the cock is provided with two necks,
in one of which is the stuffing box around the operating rod, and in the other a
hollow plug in which is placed the valve, which has its seat in the body of the
cock.
When closed the valve is kept against its seat by the pressure of the fluid, the
passage of which is thus intercepted. To allow the fluid to pass, the operating
rod is pressed, and the valve thereby forced from, its seat. As soon as the rod is

page_text: released, the valve is again thrust against its seat by reason of the difference of
pressure arising from the flow of the fluid through the cock. Small holes are bored
in the hollow plug to allow the fluid to pass under the valve, so that it may be
easily moved.
When the plug containing the valve can be placed in the top of the body of the
cock, the weight assists the pressure of the fluid to close the valve; but, when the
plug has to be placed in the bottom, or when the cock is to be used for a fluid
under a low pressure, it will be advantageous to place inside the plug a small
spring to counteract or balance the weight of the valve; the pressure will then act
quite as easily as in the other arrangements.
This cock may be used for various kinds of fluids under pressure, such as steam,
water, or gas. When it is used, as a blow-off cock, it is not necessary to provide
a stuffing box around the operating rod, because it matters little if the fluid
escapes around the rod at the same time that it escapes from the outlet of the
cock.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said William Robert Lake in the Great Seal Patent Office on the
14th August 1882.
WILLIAM ROBERT LAKE, of the Firm of Haseltine, Lake, & Co, Patent Agents,
Southampton Buildings, London. "AN IMPROVED VALVE-COCK."-A communication
from abroad by Ambroise Bénoist, of Paris, France.
This Invention relates to an improved valve-cock in which the valve is not
attached to the rod for operating it.
In valve-cocks as heretofore constructed the valve forms a part of, or is fixed to,
the rod for opening and closing it, and the valve is brought to its seat either by
withdrawing the rod, or by pushing it in; the consequence of this rigid connection
is that, if the construction of the valve-cock, is not perfect, the valve does not fit
exactly upon its seat, and the cock leaks, which causes annoyance, particularly in
locomotive surface. It also frequently happens, especially in gun metal cocks, that
the valve comes off the rod, and is thus rendered useless.
The object of this Invention is to overcome these inconveniences, and it is
chiefly effected by making the valve independent of the rod; the valve is kept
against its seat simply by the pressure of the fluid, and is opened by pushing in
the rod.
The improved construction of valve-cock will be easily understood on reference
to the accompanying Drawing, in which,
Figure 1 represents a longitudinal section, and
Figure 2 a transverse section.
The body of the cock A is provided with two necks B, C, in one of which is the
stuffing-box a around the operating rod D, and in the other a hollow plug b; in
this plug is arranged the valve c which has its seat & in the body of the cock.
When closed, the valve is kept against its seat by the pressure of the fluid, the
passage of which is thus intercepted. To allow the fluid to pass, the operating rod
is pressed and the valve thereby forced from its seat. As soon as the rod is released,
the valve is again thrust against its seat by reason of the difference of pressure
arising from the flow of the fluid through the cock. Small holes o, o, are bored in
the hollow plug b to allow the fluid to pass under the valve, so that it will not be
too difficult to move.
When the plug containing the valve can be placed in the top of the body of the
cock, the weight assists the pressure of the fluid to close the valve, but when the
plug has to be placed in the bottom, or when the cock is to be used for a fluid
under a low pressure, it will be advantageous to place, inside the plug, a small
spring to counteract or balance the weight of the valve, the pressure will then act
quite as easily as in the other arrangements.
This cock may be used for various kinds of fluids under pressure, such as steam,
water, or gas. When it is used as a blow off cock, it is not necessary to provide a
stuffing-box around the operating rod, because it matters little if the fluid
escapes around the rod at the same time that it escapes from the outlet of the
cock.
I may construct these valve-cocks of any shape, material, and size, according to
the use for which they are designed.
Having thus fully described the said Invention as communicated to me by my
foreign Correspondent, and the manner of performing the same, I wish it understood
that I claim,

page_text: The improved valve-cock above described, having as its essential characteristic
the complete independence of the valve, so that it has free play and fits exactly
against its seat thereby completely intercepting the passage of the fluid,
substantially as set forth.
In witness whereof I the said William Robert Lake have hereunto set my
hand and seal this Twelfth day of August in the year of our Lord One
thousand eight hundred and eighty two.