IMPROVEMENTS IN CIRCULAR SLIDE VALVES FOR STEAM AND OTHER MOTIVE POWER ENGINES STEAM HAMMERS AND PUMPS AND IN MEANS FOR OPERATING THEM
Year: 1884

page_text: We WALTER PAYTON of 38 Masbro Road, Brook Green in the County of
Middlesex, Mechanical Engineer and ALEXANDER WILSON of Vauxhall Iron Works
Wandsworth Road in the County of Surrey Mechanical Engineer do hereby declare
the nature of our invention for "IMPROVEMENTS IN CIRCULAR SLIDE VALVES FOR
STEAM AND OTHER MOTIVE POWER ENGINES STEAM HAMMERS AND PUMPS AND IN
MEANS FOR OPERATING THEM " to be as follows:-
Our said improvements relate to slide valves having a circular form and our
object is to construct them in such a manner that they may be operated by valve
spindles situated in a plane entirely outside the plane of the motion of the valves
and connected to them at- their contres for the purpose of operating them as by
such means we are enabled to dispense with the large hoops fitted to the exterior
of such valves hitherto used for connecting them to their valve spindles and
substitute for them a connection which having much less friction will permit of the
valves turning with greater freedom upon their faces.
In carrying our said improvements into effect we provide the valve chest cover
with bearings bored to receive the valve spindle the axis of which is parallel to but
lies in a plane entirely outside the plane of the valves' motion and upon such
spindle and at right angles to it we fix a circular pin of such a length and in such a
position as will enable it to fit within a hollow boss formed in and at the centre of
the valve. The said pin is in some cases freely fitted with a circular conical bush
which is prevented turning upon it by means of a feather and the hollow in the
said boss may be made conical to receive the said bush the said pin being fitted
with a coiled spring for the purpose of constantly pressing the said conical bush
into its seat in the said boss so as to make up for wear and tear of such parts.
In lieu of the said pin we may in some cases form the connection between the
valve and the valve spindle by fixing upon it a cup the interior of which is fitted
to the exterior of the said boss.
The valve spindle is provided with a gland or glands in the usual manner and
any reciprocatory motion given to it will be imparted to the valve which will
however be free to turn in either direction upon the connecting pin or within the
connecting cup above mentioned.

page_text: Improvements in Circular Slide Valves for Steam and other
Motive Power Engines, Steam Hammers, and Pumps, and in
COME LEIE
SPECIFICATION.
We, WALTER PAYTON of 38 Masbro Road Brook Green in the County of
Middlesex Mechanical Engineer and ALEXANDER WILSON of Vauxhall Iron Works
Wandsworth Road in the County of Surrey Mechanical Engineer do hereby declare
the nature of our invention for IMPROVEMENTS IN CIRCULAR SLIDE VALVES FOR
STEAM AND OTHER MOTIVE POWER ENGINES STEAM HAMMERS AND PUMPS AND IN
"
MEANS FOR OPERATING THEM" and in what manner the same is to be performed
to be particularly described and ascertained in and by the following statement
reference being had to the annexed sheet of drawings in which Figure 1 is a section
of the valve chest of a steam engine cylinder containing our improvements and
Figure 2 a modification of a part of them.
In Figure 1 a is the port face portion of a steam engine cylinder and b is its
valve chest and cover, c is a circular slide valve the central portion of which is
formed into a boss c¹ bored out concentrically for the purpose of receiving the
cylindrical pin d which is keyed on or otherwise made fast to the valve spindle e.
The cover is constructed with a stuffing box and bearings through which the
spindle e is reciprocated and any motion given to such spindle is imparted to the
valve c by means of the connecting pin d the said valve being at the same time left
entirely free to turn upon the pin & should it have any tendency to do so.
In Figure 2 is shown a modification of the central boss of the valve which is
fitted with a conical bush constantly pressed into a conical seat by a spiral spring
for the purpose of taking up any wear those parts may be subjected to and the said
bush is provided with a feather to prevent its turning upon the pin d.
In Figure 1 our improvements are shown as applied to Payton and Wilson's
double ported circular slide valve but any other kind of circular slide valve capable
of being adapted to them may be used instead of it.
In Figure 1 we have also shown the valve spindle e situated on the outside of
the valve If preferred however it may be placed on the other side of it so as to
move between the valve and the piston, the pin d being turned in the contrary
direction. In this case the valve chest may form a portion of the cylinder instead
of that of the cover and the cylinder will have to be provided with the necessary
stuffing box and bearings for the valve spindle e to reciprocate in.
Having now fully described and ascertained the nature of our said invention
and in what manner the same is to be performed we declare that what we claim is
The method of giving motion to circular slide valves by means of spindles
situated outside their plane of motion substantially as herein specified and
illustrated by the drawings.
Dated this 23rd day of February 1885
WALTER PAYTON.
ALEXANDER WILSON.