Improvements relating to what are known as Marine Governors.
Year: 1893

page_text: Date of Application, 3rd Feb., 1893
Complete Specification Left. 3rd Nov., 1893-Accepted, 23rd Dec., 1893
PROVISIONAL SPECIFICATION.
Improvements relating to what are known as Marine Governors.
I, SAM DYSON of Parkfield House, Elland, Yorkshire Gentleman do hereby
declare the nature of this invention to be as follows:-
My invention is devised with a view to reduce to a minimum, what is known in
connection with steam ships, as the "racing" of the screw propeller consequent
upon the latter emerging wholly or in part from the water when the vessel pitches,
and involving as frequently occurs great damage to the driving machinery and
resulting even sometimes in the fracture of the screw propeller shaft.
In accordance with my invention I make provision at the stern of the vessel in
contiguity with the screw propeller, for the reception of a float preferably
cylindrical, and of the requisite capacity and weight proportionate to the
requirements of the vessel to which the device in accordance with my invention is
to be adopted. Said float is so devised that by means of a series of connecting
rods and articulated members as to be put in mechanical connection with the steam
throttle valve of the engine or engines, so as to ensure that immediately the screw
rises to the surface of the water my invention comes into operation and shuts off
the steam to the engines and as soon as the screw has again a sufficient head of
water the float opens the valve to engines again. I may also control the engines
and throttle valves by means of a diaphragm connected with electricity, hydraulic
or compressed air &c.
Dated this 31st day of January 1893.
JAMES
STEVENSON,
Gray's Inn Chambers, 20, High Holborn, W.C.,
Agent for Applicant.
COMPLETE SPECIFICATION.
Improvements relating to what are known as Marine Governors.
I, SAM DYSON of Parkfield House, Elland, Yorkshire, Gentleman, 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 :-
My invention is devised with a view to reduce to a minimum, what is known-in
connection with screw steam ships-as the "racing" of the propeller, due to the
increased velocity of same when the stern of the vessel is, by "pitching," lifted out
of the water, involving as frequently occurs, great damage to the driving machinery
and resulting even sometimes in the fracture of the propeller shaft.
The improvement, according to my invention, commends itself to steam ship
owners and others, by its great simplicity, facility of application, and reliability.
And in order that the nature of my said invention may be the better understood, I
have appended the accompanying sheet of drawings, illustrative thereof, reference
to which is made hereunder.
In accordance with my invention, I ensure that the steam supply to the engine or
engines is worked or controlled on the pitching of the vessel, by the following
means: That is to say:-At or near the stern of the vessel, as at a I make provision
for the reception of a float or buoy b, in a cylindrical or other suitably shaped
The capacity and weight of said
vessel or chamber c, to which the sea has access.
buoy or float device would be proportionate to the requirements of the engine or
engines of the vessel to which my invention is to be applied. The float or buoy b

page_text: is brought into mechanical connection with the steam supply valve of the ship's
engine or engines, as shewn, through the intervention of the chain, link, or the
like, 1, and the series of articulated members 2, 3, 4, and 5 in such manner, and so
as to ensure that immediately upon the propeller when the vessel pitches leaving
the water, the float a will in its vertical travel, act upon the valve of the steam
supply pipe, through the connections 1, 2, 3, 4, and 5 aforesaid, and close same
proportionately to the extent to which the propeller leaves the water; and, per
contra, on the propeller resuming its normal degree or extent of immersion.
As an alternative means I might in certain cases cause the float or buoy b to
actuate the valve of a small auxiliary engine disposed near the steam supply valve
of the main engine or engines of the vessel and so control or work the main steam
supply valve from the interposed auxiliary engine.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
:-
The arrangement and combination of parts substantially as herein described and
shewn in the accompanying sheet of drawings for preventing the increased velocity
or "racing" of screw propellers.
JAMES STEVENSON,
Gray's Inn Chambers, 20, High Holborn, London, W.C.,"
Agent for Applicant.