Improvements in Steam and other Fluid-pressure Engines.
Year: 1890

page_text: COMPLETE SPECIFICATION.
Improvements in Steam and other Fluid-pressure Engines.
I, HERBERT WILLIAM MORLEY, of 54, Ashgrove, Bradford in the County of York,
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 improvements in steam and other fluid-pressure engines
and its object is to provide an efficient independent cut-off valve free from complica-
tion and adapted to be operated in a simple manner.
The said improvements consist in the arrangement of cylindrical valves hereinafter
described as well as the particular mechanism for placing the cut off under the control
of the governor.
Reference is to be had to the accompanying sheets of drawings forming a part of
this Specification, in which similar letters of reference indicate corresponding parts in
each of the figures.
Figure 1, represents an elevation partly in section of an engine cylinder fitted with
cylindrical admission and exhaust valves and provided with independent cylindrical
cut-off valves arranged in accordance with my invention.
Figure 2, is an elevation of the cylinder on a smaller scale together with such parts
of an engine as are necessary to illustrate my improvements.
Figure 3, is a plan view of the same with the cylinder in section.
Figure 4, is a sectional view illustrating a modified arrangement of the valves, and
Figure 5, is a sectional view on a larger scale of the mechanism regulating the cut-
off valve.
The admission and exhaust valves A, A, at each end of the cylinder B are of the
ordinary type arranged and operated in the usual manner by means of levers a, a on
their spin lles a a¹. The levers a, a, are coupled together by the coupling rod and
are operated by the eccentric B₁ on the main shaft through the medium of the
connecting rod D vibrating lever D¹ and connecting rod D³.
The cylindrical cut-off valves E, E, are mounted between and parallel to the
valves A, A, within valve chambers F provided with liners G for convenience of
construction and having "gridiron " shaped ports d to meet the similarly shaped faces e
of the valves.
In the arrangement illustrated by Figure 4 the admission and exhaust valve A is
placed round the stationary valve casing or liner G and the cut-off valve E is fitted
inside said liner. The valves are operated in any convenient manner and the spindle
of the outer valve may be made hollow to allow the inner valve spindle to be passed
through for the purpose of operating it.
The valves E, E, are coupled together by the rod J connecting the levers K. K on
the ends of spindles L, L, of the valves and such valves are opened and closed by a
cam m on the cam sleeve M which sleeve is mounted on the shaft N. The shaft N is
connected to and driven at the same speed as the main shaft by a pair of bevel
wheels P, P connecting it to the shaft Q and the shaft Q is driven from the main
shaft by the bevel wheels R, R. The shaft N is hollow and receives the end of the
governor rod S which carries the head i free to revolve thereon but confined
longitudinally between the collars . The head i has a key projecting through the
longitudinal slot t in the shaft N into the inclined or helical keyway u in the sleeve M.
The rod S from the governor is operated longitudinally in the usual manner as the
speed of the engine varies and thereby moving the key j in the inclined keyway u
advances or retards the cam in relation to the crank shaft or steam piston and so
regulates the cut off. The cam m operates the slide T by engaging the antifriction
rollers, projecting therefrom and the slide T is connected to the rod J by the
connecting rod U.

page_text: Having now particularly described and ascertained the nature of my said invention,
and in what manner the same is to be performed, I declare what I claim is :
1. In a steam or other fluid-pressure engine the combination with the admission and
exhaust valves of cylindrical cut-off valves arranged and operated substantially as
herein shown and described.
2. The combination with said cut-off valves of the cam sleeve m with the inclined
groove u engaging the key j arranged to be regulated by the governor, substantially
as herein shown and described, and for the purpose specified.
Dated this 12th day of November 1890
DRACUP & NOWELL,
Bradford, Agents.