An Improved Electric Marine Governor for controlling and avoiding the racing of Marine Engines.
Year: 1887

page_text: Date of Application, 5th May, 1887
Complete Left, 28th Oct., 1887
Complete Accepted, 29th Nov., 1887
ROBERT BATES MADDISON residing at 273 High Street West, Sunderland in the
County of Durham Engineer, do hereby declare the nature of this invention to be as
follows:-
An Improved Electric Marine Governor for controlling and avoiding the racing of
Marine Engines at Sea in rough and stormy weather.
1st. There will be a cylinder fixed horizontally on to the Stern post of the vessel,
open at the fore end with a perforated cover on the after end, containing a piston
situate at the front end, and a spiral spring between the piston and the aforesaid cover,
this cylinder is fixed just below the surface of the water when light ship.
2nd. There is a tube leading from the Shell plate to the after peak bulkshead in
which there is placed a Stuffing box and Gland, being similar to a Stern tube, through
the tube already described the piston rod is led, the piston being attached to the
outer end, and the inner end is tapped so that a thumb screw may be put in, by which
means the rod can be lengthened or shortened.
3rd. Immediately above or below the piston rod aforesaid (as may be required)
there will be an electric cell box containing acids necessary to produce the electricity
required, from which box there will be a small nipple projecting to the horisontal line
of the piston rod and thumb screw.
4th. The Spiral Spring between the piston and perforated cover as aforesaid will be
so sensitive as to give with the current, or velocity of water caused by the motion of the
vessel, and by so doing the aforesaid thumbscrew is removed from the nipple, but as
soon as the water leaves the light Ship water line, it also leaves the Cylinder and
consequently there is no resistance, then the Spiral Spring behind the piston forces
the piston forward which causes the end of the rod or thumbscrew to press the nipple,
causing the electricity to be conveyed instantly (by means of an electric wire) along
the tunnel into the Engine room where there will be a magnet affixed to the wire,
this magnet is placed close to the end of the Slide Valve Spindle, on the end of this
Spindle there is a dial placed corresponding with the aforesaid magnet, therefore as
soon as the nipple is touched the magnet is charged with electricity and opens the
Slide Valve instantly admitting steam into an Ordinary Cylinder, and as soon as the

page_text: Cylinder at the Stern touches the water again, the velocity of water coming against
the piston compresses the Spring, thus removing the rod from the nipple, thereby
discharging the magnet and the Slide Valve Spindle which is again brought into its
normal position (that is admitting steam for the return stroke) by means of a small
Spiral Spring situated between a collar on the Slide rod and a bracket from the
Cylinder, this Cylinder being of the ordinary class with a direct lead (if possible)
to a leaver keyed in the usual way to the throttle valve main Spindle.
5th. I also propose to key another leaver to the aforesaid Spindle (in like manner)
and lead a rod from the latter leaver to another leaver keyed on to another Spindle
on which there will be a throttle valve to be placed in the exhaust column, and it
being connected to the main Spindle, the feed and exhaust will be shut simultaneously
thus expelling all power.
6th. I moreover intend to make and set the Slide valve so as to use steam and
vacuum for closing the throttle valves, and vacuum only for opening ths same, thus
never admitting steam to the front of the piston.
Dotad this 4th day of Ma.. 1007

page_text: Improved Electric Marine Governor.
ROBERT BATES MADDISON 25 Low Row Sunderland, Engineer, formerly of
273 High Street West Sunderland, 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 Fig. 1 (a) represents Sternpost and (b) Shellplate of vessel, (c) is a Cylinder
fixed in a horizontal or oblique position upon the Sternpost (a), it is open at the fore
end and has a perforated cover (d) on the after end and it contains a piston (e)
situate at the fore end. This Cylinder is fixed just below the surface of the water
when light Ship. There is a tube (f) leading from the Shellplate (b) to the after
peak bulkshead (9) the after end of the tube (e) being attached to the Shellplate (b)
and the fore end to a Stuffing box (h) which is fixed to the after peak bulkshead (g).
Through the tube (f) the piston rod (i) is led, the piston (e) being attached to the
outer end, and the inner end is tapped so that a thumbscrew (1) can be put in, by
which means the rod (i) can be lengthened or shortened. (k) is a gland and (1) a
bridge which forms a base for the Spiral Spring (m). (n) is a bracket projecting
from the top or side of the tunnel to the horizontal line of the piston rod (i).
From the bracket (n) an electric wire (o) is led along the tunnel into the Engine
room and attached to the magnets (p) which are fixed close to the end of the Slide
valve spindle (a).
Fig. 2 which is an ordinary Steam Cylinder worked by a piston valve (b) this
valve being worked by the magnets (p) and Spiral Spring (c). This steam cylinder
is fixed with a direct lead (if possible) to a lever keyed on the throttle valve spindle.
I shall also key another lever to the aforesaid spindle and lead a rod from the latter
lever to another keyed on to a spindle in which there is a throttle valve to be placed
in the exhaust column (if required) and it being connected to the main spindle, the
feed and exhaust will be shut simultaneously.
Fig. 3 is a pipe to be fitted to the low pressed intermediate and other cylinders (if
required) it contains a through or one way cock which is worked by a rod led from
main throttle valve spindle to a lever fixed on to the head of the cock (a), this cock
(being connected to the main spindle) is opened at the same moment as the throttle
valve is shut and the steam pressure is thereby made common to both sides of the
piston, and the moment the throttle valve is opened, the cock is closed, consequently
the steam pressure works on the top and bottom of the piston respectively. This pipe
is fitted, and is very similar to those used on starting valves.

page_text: the rod forward and presses the electric bracket which forms a contact and instantly
opens the slide valve admitting steam to a small Cylinder, by which means the throttle
valve is closed or vice versa. Before the water inclines to the light ship water line
the pressure coming against the fore side of the piston removes the rod from the
aforesaid bracket instantly discharging the magnets and the Slide Valve immediately
resumes its normal position by means of a spiral spring and the throttle valve is
thrown open.
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
(1) The Cylinder placed in a horizontal or oblique position upon the stern, the
piston and piston rod worked as aforesaid and in direct communication with the afore-
said electric bracket.
101 TI.
1. ko ma-bed no already decoribad