Improvements in Steam Steering Machinery.
Year: 1891

page_text: Date of Application, 27th Apr., 1891
Complete Specification Left, 26th Jan., 1892--Accepted, 27th Feb., 1892
PROVISIONAL SPECIFICATION.
Improvements in Steam Steering Machinery.
We, STEPHEN ALLEY and JOHN ALEXANDER MACLELLAN, of the Sentinel
Works, Polmadie in the County of Renfrew, North Britain, Engineers, do hereby
declare the nature of this invention to be as follows, that is to say :-
Our said invention has for its object to improve the construction of steam
steering machinery and to render the same very compact and convenient in
arrangement.
Our improved machinery, which may be placed at any convenient part of a ship
is arranged to act on the rudder by chains moved by means of a grooved pulley
placed horizontally with its axis vertically, the chains passing from it at any
convenient horizontal angle. The pulley is placed in a casing having a cover
which forms the base plate of the steam-engine details and the pulley is driven by
means of a pinion gearing with internal teeth on the pulley, the pinion being on the
lower end of a vertical shaft projecting down through the base-plate cover. On the
upper part of the pinion shaft there is a wormwheel which is acted on by a worm
on a horizontal crank shaft, carried in bearings on the base plate and driven from
a pair of horizontal cylinders placed one on each side. A clutch is arranged in
connection with the wormwheel to allow of its being put out of gear when steam
power is not available; and the wormwheel shaft is arranged in a well known way
by means of a screw sleeve in connection with a shaft turned by the handing wheel,
to move the controlling valve to its middle neutral position as the engine moves the
rudder to any required position The engine details are all enclosed in a casing
which is well supplied with lubricant, and keeps the parts unaffected by external
influences.
When steering gear of only moderate power is required the wormwheel may be
put directly on the pulley shaft.
Dated this Twenty-third day of April 1891.
•
EDMUND HUNT,
Applicants' Agent.
COMPLETE SPECIFICATION.
Improvements in Steam Steering Machinery.
We, STEPHEN ALLEY and JOHN ALEXANDER MACLELLAN, of the Sentinel
Works, Polmadie, in the County of Renfrew, North Britain, Engineers, 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, that is to say :-
Our said invention has for its object to improve the construction of steam
steering machinery and to render the same, very compact and convenient in
arrangement.
In carrying out our invention we have our improved machinery which may be
placed at any convenient part of the ship arranged to act on the rudder by chains,
moved by means of a grooved pulley, placed horizontally with its axis vertical, the
chains passing from it at any convenient horizontal angle. The pulley is driven by
means of a pinion, gearing with internal teeth on the pulley, the pinion being on
the lower end of a vertical shaft, projecting down through the base-plate cover,
which encloses the pulley and supports the engine details. A clutch acting in
connection with a worm-wheel, carried on the upper part of the pinion shaft and

page_text: acted on by a worm on a horizontal shaft, driven from a pair of cylinders placed
one on each side, is arranged to allow of the worm-wheel being put out of
gear when
steam power is not available. The worm-wheel shaft is arranged in a well knowu
way to move the controlling valve to its middle neutral position, as the engine
moves the rudder to any required position.
And in order that our said invention and the manner of performing the same may be
properly understood, we hereunto append two sheets of explanatory drawings, to
be hereinafter referred to, and showing an example of our improved steam steering
machinery.
Figure, 1, of the drawings is a plan, Figure, 2, is a side elevation, Figure, 3, is
a horizontal section, and Figure, 4, is a vertical section of our improved steam
steering machinery. In these drawings the same reference letters are used to mark
the same or like parts wherever they are repeated.
As shown in the drawings our improved machinery is arranged to act on the
rudder by chains, A, moved by means of a grooved pulley, B, placed horizontally
with its axis, C, vertical, the chains passing from it at any convenient horizontal
angle. The pulley, B, is placed in a casing, D, having a cover, E, which forms
the base plate of the steam engine details, and the pulley is driven by means
of a pinion, F, gearing with internal teeth, G, on the pulley, the pinion being on
the lower end, H, of a vertical shaft, J, projecting down through the base-plate
cover, E. On the upper part of the pinion shaft, J, there is a wormwheel, K,
which is acted on by a worm, I, on a horizontal crank shaft, M, carried in
bearings, N, on the base-plate or casing cover, E, and driven from a pair of
horizontal cylinders, P, placed one on each side. A clutch, Q, is arranged
in connection with the wormwheel, K, to allow of its being put out of gear, when
steam power is not available; and the worm wheel shaft, J, is arranged in a well
known way, by means of a screw sleeve, R, in connection with a shaft, S, turned by
the handing wheel, T, to move the controlling valve, V, to its middle neutral
position as the engine moves the rudder to any required position. The engine
details are all enclosed in a casing, W, which is well supplied with lubricant, and
keeps the parts unaffected by external influences.
When steering gear of only moderate power is required, the wormwheel, K, may
be put directly on the pulley shaft, C.
Having now particularly 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 construction, arrangement and combination of parts constituting our
improved steam steering machinery substantially as hereinbefore described, and as
shown in the accompanying drawings.
Dated this Twenty-fifth day of January 1892.
EDMUND HUNT,
Applicants' Agent.