Improvements in Equilibrium Valves for Controlling the Supply of Water, Gas, Steam, or other Motive Power to Engines, Pumps, and such like.
Year: 1891

page_text: Date of Application, 6th Nov., 1891
Complete Specification Left, 4th Aug., 1892-Accepted, 10th Sept., 1892
PROVISIONAL SPECIFICATION.
Improvements in Equilibrium Valves for Controlling the Supply
of Water, Gas, Steam, or other Motive Power to Engines, Pumps,
and such like.
WILLIAM JOHN BRETT 1 Gloucester Street Coventry Engineer do hereby
declare the nature of this invention to be as follows:-
-
The
This invention consists in the improved construction and arrangement of an
equilibrium valve by the use of which when applied for example to the cylinder
of a steam engine the ordinary slide valve is dispensed with and the friction caused
by the use of the latter entirely obviated, thus effecting a saving in the consumption
of steam. I provide an outer casing or body which communicates by means of
suitable apertures with the steam ports of the cylinder, in this body or casing a
valve or plug is fitted having a steam way, or passages formed in same.
apertures in the body, or casing are so placed that when one of the passages in
the plug or valve is in communication with a port through the medium of said
aperture the other passage in the plug or valve is closed by the inner wall of the
casing or body and vice versa. An exhaust outlet is provided in the casing or body
with which one "port" is in communication when the other port is in communication
with the passage in the plug or valve, a part of the outside of the plug or valve
being formed so as to allow the exhaust to pass from the "port" of cylinder to the
outlet provided in casing. Suitable packing or rings are provided between the
plug or valve and casing or body so as to prevent escapement of steam etc.
The steam water, gas or other motive power is supplied to the centre of the plug
or valve which is hollow, through one end; suitable stuffing boxes being employed
a spindle attached to the plug or valve is operated by any well known means such
as, a lever worked by an eccentric, cam, or any other approved means for giving
the necessary motion to the plug or valve by means of which the steam etc. is
supplied alternately to the ports in the cylinder. The plug or valve is so pierced
that the steam is in communication with the bearing surfaces thus reducing the
working friction to a minimum. In a modified arrangement I may place a casing
or body and plug or valve at each end of the cylinder each casing then having one
aperture communicating with the steam port in cylinder the plugs or valves as
before described being operated simultaneously or alternately. If desired I may
use a taper plug or valve working in a taper bore in the body or casing by which
means any wear may be readily taken up.
I may also apply this invention for use as stop or feed valves.
Dated this 7th dex of November 1901
E. EATON,
Agent for Applicant.
COMPLETE SPECIFICATION.
Improvements in Equilibrium Valves for Controlling the Supply
of Water, Gas, Steam, or other Motive Power to Engines, Pumps,
and such like.
I, WILLIAM JOHN BRETT, of 1 Gloster Street, Coventry, in the County of
Warwick, 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 :-
This invention relates to equilibrium valves for controlling the supply of

page_text: steam, water, gas or other motive medium of power, to engines, pumps and
such like.
Essentially it consists of an open ended cylindrical rotative valve in which the
supply is delivered through the said open end into the interior of the valve, and
having discharge ports or opening or openings in the longitudinal sides or shell of
the valve for emission, and of the subordinate parts as hereinafter described.
By the application of this my improved valve to a steam engine cylinder for
example, the ordinary slide valve is dispensed with, and the great friction caused
by the use of the latter is obviated, thereby effecting considerable saving in the
consumption of steam.
In order to more clearly explain this my invention and how it is to be performed,
I have appended hereunto illustrative sheets of drawings upon which are figures
and numbers of reference, similar numbers referring throughout the several views to
the same thing or part.
Fig. 1, is an external view of this my invention as applied to a steam cylinder.
Fig. 2, is a sectional plan view of the valve and its adjacent ports on line A-B.
Fig. 3, is a sectional cross elevation on line C-D.
In
I provide an outer casing or body 1, which may in some instances be cast in one
with the cylinder 2, or other similar body, or, it may be made separate therefrom
and bolted thereto. In this casing are made the apertures or ports 3, 35, which
lead to the interior of the cylinder &c., and also having an exhaust outlet 4.
this casing is fitted the valve 5, whose central part is hollow and open from the one
end. This open end forms the admission way, to the face of which is connected
the supply pipe 6. In the sides of this valve, openings 7, 7", are made
communicating from the interior to the exterior of the valve, and thence to the
ports 3, 3. These openings 7, 7, may be placed at any suitable angle to each other
to suit their respective ports 3, 3ª.
Upon the exterior of the valve and between the openings, the body is
reduced at 8, 8, which thus forms an exterior exhaust passage. These openings
are so placed in relation to the ports 3, 3, that when the opening 7, is open to the
cylinder, the opening 7*, is closed, but the port 3*, is in the latter case open to the
exhaust 4, and vice versa.
If desired a similar valve 9, may be placed within the main valve 5, having
similar openings 7b, 7", which communicate with the openings 7, 7", and thence as
before with the ports 3, 3ª, and exhaust 4, thus serving as a cut off valve to the
main valve. The valves 5 and 9 are operated by means of the spindles 10, and 11,
respectively which may be worked by any well known means such as a lever
actuated by an eccentric, cam or other approved arrangement for giving the
necessary motion to the said valve or valves, by means of which the steam &c. is
supplied alternately to the ports in the cylinder. These spindles are made steam &c.
tight by means of stuffing boxes such as 12. Suitable packing rings or strips
such as 13 are provided and placed in any suitable position so as to prevent the
escapement of steam &c. Also the end of the valve is pierced as shown at 14,
which communicates with an annular groove 15; thus the pressure of the steam &c.
finds its way between the end surface of the valve and that of the casing, and
removes or reduces the frictional pressure and wear that would otherwise ensue.
In some cases I may modify the valve by only making one opening 3, and having
only one port 7, and in the case of its application in such form to an engine for
instance I may provide one of such valves at each end of the cylinder.
Although have shown the valve as being parallel, still in some cases I may
make it taper, so that it may be adjusted longitudinally from time to time to take
up the wear.
Having now particularly described and ascertained the nature of this my said
invention, and in what manner the same is to be performed, I declare that what
I claim is
1. A hollow centred valve having an end inlet or supply opening, and side outlet

page_text: or discharge openings, and external exhaust way and operating spindle, as herein
described and illustrated upon the drawings.
2. In equilibrium valves the combination with the casing 1, having a port or
ports 3, 3, and exhaust 4, of the valve 5, having end inlet and side outlets openings
and exhaust way and spindle substantially as described and illustrated.
3. The combination with the casing 1, and its passages, and the valve 5,
and its inlet and outlet passages of the modified valve 9, having end supply
opening, and side outlet openings 7b, 7, and spindle 11, as herein described and
illustrated upon the drawings.
1000
CHARLES T. POWELL,
Applicant's Agent.