Year: 1896

page_text: Date of Application, 23rd Sept., 1896
Complete Specification Left, 10th June, 1897-Accepted, 10th July, 1897
I, ANDREW BETTS BROWN, of Rosebank Iron Works, Edinburgh, in the County of
Mid Lothian, North Britain, Engineer, do hereby declare the nature of this Invention
to be as follows, that is to say:-
My said invention relates to steering machinery to a considerable extent of the
kind described in my Patent Specification, No. 10, 132, of 1889, and the object of my
present improvements is to render parts of the machinery more compact and better
adapted for use in cases in which it is desirable to occupy as little space as
possible.
In some practical applications of the machinery described in my Patent
Specification hereinbefore referred to, a crosshead on the rudder head is connected by
side rods to an inner crosshead at a suitable distance forwards, and the actuating
machinery has been applied to a long lever or tiller fixed to such forward crosshead,
such long lever requiring considerable space to allow of a suitable application of the
power to it. By iny present Invention I dispense with such inner or forward lever or
tiller and apply the power to the forward crosshead through differential gearing
which allows of a suitable application of the necessary power in a compact and
convenient arrangement.
The steam-motor details, which are in a casing with lubricating appliances
as described in my earlier Specification herein before referred to, actuate a worm shaft
which gears with a worm wheel on a vertical shaft having the same axis as the
forward crosshead. The vertical shaft has on it a pinion gearing with a planet pinion
which latter also gears with two internally toothed rings one of which is normally
stationary the other one being fixed to the forward crosshead and having fewer teeth
(two fewer, for example) than the stationary ring. The effect of the differentially
toothed rings is to make the ring fixed to the crosshead, and the crosshead with it,
move much more slowly than the vertical shaft, and consequently with inversely
corresponding increased power. This gearing may be enclosed in a casing, and be
lubricated by appliances like those of the motor apparatus. What has been referred
to as a stationary internally toothed ring is by preference held by a frictional
appliance controlled by an adjustable spring so as to be capable of yielding when the
rudder is struck by a heavy sea.
Hand gear of any suitable type may be fitted in connection with the internally
toothed ring fixed to the forward crosshead, and may be put into operation by
tightening up a friction clutch as in my earlier arrangement the frictional
appliance connected with the other internally toothed ring being then relieved.
Dated this Twenty-second day of September 1896.
EDMUND HUNT,
Applicant's Agent.

page_text: Improvements in Steering Machinery.
I, ANDREW BETTS BROWN, of Rosebank Iron Works, Edinburgh, in the County of
Mid Lothian, North Britain, 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, that is to say:
My said Invention relates to steering machinery to a considerable extent of the
kind described in my Patent Specification No. 10,132 of 1889 and the object of my
present improvements is to render parts of the machinery more compact and better
adapted for use in cases in which it is desirable to occupy as little space as
possible.
In some practical applications of the machinery described in my Patent Specification
herein before referred to, a crosshead on the rudder head is connected by side rods to
an inner crosshead at a suitable distance forwards, and the actuating machinery has
been applied to a long lever or tiller fixed to such forward crosshead, such long lever
requiring considerable space to allow of a suitable application of the power to it. By
my present Invention I dispense with such inner or forward lever or tiller and apply
the power to the forward crosshead through differential gearing which allows of
a suitable application of the necessary power in a compact and convenient
arrangement.
:
And in order that my said Invention and the manner of performing the same may
be properly understood I hereunto append four sheets of explanatory drawings, to be
hereinafter referred to, and showing examples of steering machinery as made according
to my Invention.
Figures, 1, and 2, on Sheet, 1, of the drawings are a sectional plan and a sectional
elevation of one modification of the improved steering machinery. Figures, 3, and 4,
on Sheet, 2, are horizontal and vertical sections (the latter being as at right angles to
Figure, 2) of the same. Figures, 5, and 6, are a plan and an elevation of part of a
second modification of the improved machinery. Figure, 7, on Sheet, 3, is a plan of
a part of a third modification of the improved steering machinery. Figures, 8, and 9,
on Sheet, 4, are a sectional plan and a vertical section of a part of a fourth modification
of the improved steering machinery. In these drawings the same reference letters
and numerals are used to mark the same or like parts wherever they are
repeated.
The steam motor details which are in a casing, A, with lubricating appliances, as
described in my earlier Specification herein before referred to, are arranged to actuate
a shaft, A 1, which either by means of a worm, C, and a worm wheel, D (as in
Figures, 1, 2, and 4) or by means of bevil wheels, E, (as in Figure, 6) actuates a vertical
shaft, B, having the same axis as the forward crosshead, F.
The forward crosshead, F, is connected by rods, F 1, to the after crosshead, F2, on
the rudder head, F 3. The vertical shaft, B, has fast on it, in the modifications shown
in Figures, 1, 2, 3, 4, 5, and 6, a pinion G, gearing with a planet pinion, H, carried by
arms, H 1, loose on the shaft, and the planet pinion also gears with two internally-
toothed rings, J, and, K, one, J, of which is normally stationary owing to the action of
an appliance hereinafter described, while the other one, K, is fixed to a frame, F 4, of
which the forward crosshead, F, is a part, and has fewer teeth (two fewer for example)
than the stationary ring, J. The action of the planet pinion, H, on the differentially-
toothed rings, J, and, K, makes the ring, K, fixed to the crosshead, F, and the
crosshead with it, move much more slowly than the vertical shaft, B, and consequently
with inversely corresponding increased power. This gearing is enclosed in a casing
formed by the framing, L,,and may be lubricated by appliances like those of the
motor apparatus. The stationary internally-toothed ring, J, is held by a frictional
band, J 1, encircling it and controlled by an adjustable helical spring, J 2, so as to

page_text: be capable of yielding when the rudder is struck by a heavy sea. The stationary
ring, J, fits on to a part of the framing, L, turned to receive it, and is made with an
internal horizontally-projecting flange, J 3, which fits into a cylindrical rebate in the
framing, and with an external horizontally-projecting flange, J.4, on which sits the
frictional band, J 1. The frictional band, J 1, consists of a metal ring (with an inner
lining of wood or other suitable material) which is fixed by flanges, J 5, to the
framing, L, and is made in halves which are drawn together by a screw, J 6, against
the action of the helical spring, J 2, on the screw.
Instead of the differential gearing herein before described with reference to
Figures, 1, to 6, there may be keyed on the shaft, B, an eccentric, M, shown in
Figure, 7, which has on it a toothed ring, N, gearing with the toothed rings, J, and K.
The result of the action of the eccentric ring, N, on the differentially-toothed
rings, J, and K, is that the ring, K, which is fixed to the crosshead, F, and the
crosshead with it is made to move much more slowly than the shaft, B, and
consequently with inversely corresponding increased power.
In the modification of differential gearing shown in Figures, 8, and 9, the toothed
ring, N, is divided horizontally or at right angles to its axis into two parts, the
upper one of which is of less diameter and has fewer teeth than the lower part.
The two parts of the ring N, are bolted together, and gear respectively with the
upper and lower differentially toothed rings, K, and J, the crosshead, F, being
moved in a similar manner to that of the other modifications herein before
described.
Hand gear of any suitable type may be fitted in connection with the forward
crosshead, F. In the arrangements shown in the drawings such gear is wrought
by hand wheels, P, which either by means of spurwheels, P 1, and a worm shaft, P4,
(as in Figure, 1) or by means of spurwheels, P1, a shaft, P 2 spurwheels, P 3, and a
wormshaft, P 4 (as in Figure, 5) actuate a friction clutch or, band, Q, formed with
external teeth, 1, for the worm of the shaft, P 4, to gear into. The friction clutch, Q,
encircles the frame, F 4, of which the crosshead, F, is a part, and the hand gear is put
into operation, as in my earlier arrangement by tightening the friction clutch, Q, and
relieving the frictional band, J 1, connected with the internally-toothed ring, J.
some cases, as in the modification shown in Figures, 2, and 4, an upper bearing. R, is
provided for the vertical shaft, B, this bearing being made with a flange, S, for being
fixed to a transverse beam or other frame piece.
In
Having now particularly described and ascertained the nature of my said Invention
and in what manner the same is to be performed, I declare that what I claim is :-
In steering machinery of the kind to which the Invention relates, the applying of
the power directly to the forward crosshead through differential gearing arranged and
combined substantially as and for the purposes hereinbefore described.
Dated this Ninth day of June, 1897.
EDMUND HUNT,
Applicant's Agent.: