Improvements in and relating to the Driving Mechanism of Ships..
Year: 1897

page_text: Date of Application, 1st May, 1897-Accepted, 19th June, 1897
COMPLETE SPECIFICATION.
Improvements in and relating to the Driving Mechanism of Ships..
1, JOHANN GOLDMANN, of Cosel, in the German Empire, Master Builder, 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:-
In power driven boats and ships as at present usually constructed the motor, such
as a steam engine, is directly connected to the paddle or screw shaft, so that this.
shaft performs the same number of revolutions as the engine.
The object of this invention is to provide suitable gearing between the engine and
the shaft so that the rotations of the latter may vary from those of the former and
so that it may be easily started or stopped or have its direction of rotation reversed
without the necessity of stopping or reversing the engine.
The accompanying drawings illustrate how my improvements may be applied to
a steam screw boat.
Figure 1 is a representation of a boat partly in elevation and partly in
longitudinal section showing my improvements.
Figure 2 is an illustration of the same boat and devices in sectional plan.
Figures 3 and 4 are views at right angles to each other of details of the
gearing.
Referring to the drawings a indicates a boiler and engine which may be of
the locomotive or any other suitable type. This motor drives by means of the
belt the countershaft e which, as illustrated in the drawings, is arrange for
driving three independent screw shafts d, e, and f. Each shaft is provided at its
inner end with a bevel wheel d', e', or f¹, which gear respectively with the pairs of
bevel wheels d d³, e³ e³, and ƒ³ f³, all of which are arranged loosely upon the
shaft c.
Each pair is similarly provided with devices for connecting one or other
of them to the shaft c and thus driving the connected screw shaft in either
direction, but I will confine my description to one pair of wheels and one screw
shaft.
Arranged between the two wheels a and d³ upon the shaft c with which it.
rotates, is a sliding double cone clutch or equivalent device h, which may be moved
longitudinally into contact with either of the wheels or may occupy a central
position in which it is disconnected from both. If the cone be in contact with the
wheel the shaft d is rotated in one direction: if the cone be in contact with the
other wheel the direction of rotation is reversed. The shaft may be thrown out of
gear and its rotation stopped by moving the cone to its central position while the
motor continues to run. Links or levers i connect the cone with a hand lever such
ask by means of which the necessary movements may be effected.
By the adoption of these improvements a slow running engine may be employed.
and the fabric of the ship be thus exposed to less shocks and vibrations. In
steam engine a more perfect expansion of the steam may be obtained with.
consequent economy of fuel, and the wear and tear of the motor is reduced..
The vessel may be stopped in a much shorter time than is now at present common,
s the screw shaft may be thrown out of gear in a moment and the reversal.
mmediately effected, if desired, as the motor has not to be stopped or
eversed..
By means of the friction coupling shown it is possible to vary the speed of
[Pins71

page_text: the screw shaft and consequently of the vessel while the motor maintains a
constant speed, and the screw may be started at any time as it has no dead
point.
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 a power driven boat or ship, the combination with the motor and with the
shaft of suitable gearing, constructed arranged and operated substantially as and
for the purpose hereinbefore described and as illustrated by the accompanying
drawings:
Dated this 30th day of April, A.D. 1897.
W. E. HEYS & SON,
Agents for the Applicant.