Improvements in Governors or Apparatus for Regulating the Supply of Steam to Screw Engines on the Rise and Fall of the Screw.
Year: 1890

page_text: Date of Application, 26th Feb., 1890
Complete Specification Left, 18th July, 1890-Accepted, 23rd Aug., 1890
PROVISIONAL SPECIFICATION.
Improvements in Governors or Apparatus for Regulating the
Supply of Steam to Screw Engines on the Rise and Fall of
the Screw.
I, BENJAMIN JOSEPH BARNARD MILLS of 23 Southampton Buildings in the County
of Middlesex, Patent Agent do hereby declare the nature of this invention a com-
munication to me from abroad by Thomas William Quelch Honey will and Carl
Johannes Edward Linnemann both of the Town of Hokitika, in the County of
Westland, in the Colony of New Zealand, to be as follows:-
The invention has for its object the gradual reduction and restoration of the supply
of steam to screw engines on the rise and fall of the screw.
For this purpose I employ a metal air piston or float working within a vertical
cylinder or chamber connected with a horizontal tunnel or cylinder on the bilge line
of a vessel.
This tunnel is of metal, it is closed at the stern end by a moveable water tight trap
or fastening and at its other end in convenient proximity to the main steam pipe it
terminates in a vertical cylinder or chamber which contains the before mentioned
metal air piston or float of somewhat smaller diameter than the said cylinder or
chamber. This metal air piston is fitted with a piston rod which passes through
an orifice fitted with a lubricator in the centre of the cover of the vertical cylinder
or chamber.
The piston rod is also guided by an upper bearing. The metal air piston or float
is fitted on its outside with four or more rollers which by running against the inside
of the vertical cylinder or chamber ensures easy vertical action.
The cover of the vertical cylinder or chamber is perforated around the lubricator
and these perforations are preferably fitted with small tubes screwed therein which
while facilitating the rising of the water in the vertical cylinder or chamber when
the vessel's stern rises to a sea also prevent spilling of the water when the vessel rolls
in the trough.
A strong metal spring is attached to the piston rod above the cylinder cover to
prevent the air piston or float sinking beyond a proper depth.
Another strong spring is fitted to the piston rod on the top of the air piston or
float cover to prevent any force when the air piston rises from striking unduly on the
cylinder cover.
A double or forked shaft attached on either side of the piston rod works directly
on a small crank or lever attached to the spindle of the throttle valve.
The governor is regulated by the quantity of water in the horizontal tunnel or
cylinder to suit the height of the sea running at the time, this is effected by two (or
more if necessary) large and powerful taps, the one admitting water from without the
vessel into the bilge tunnel, the other discharging the water from the bilge tunnel into
the different pump wells.
When the governor is not in use the trap at stern of the tunnel and one in front
of the vertical cylinder or chamber can be opened when the bilge water will flow in its
ordinary way to the various pump wells.
The length of the bilge tunnel must be in proportion to the length of the steam
ship.
Dated February 26th 1890

page_text: COMPLETE SPECIFICATION.
Improvements in Governors or Apparatus for Regulating the
Supply of Steam to Screw Engines on the Rise and Fall of
the Screw.
I, BENJAMIN JOSEPH BARNARD MILLS of 23 Southampton Buildings in the County
of Middlesex, Patent Agent do hereby declare the nature of this invention, a com-
munication to me from abroad by Thomas William Quelch Honeywill and Carl
Johannes Edward Linnemann both of the Town of Hokitika, in the County of
Westland, in the Colony of New Zealand :-
The invention has for its object the gradual reduction and restoration of the supply
of steam to screw engines on the rise and fall of the screw.
For this purpose I employ a metal air piston or float working within a vertical
cylinder or chamber connected with a horizontal tunnel or cylinder on the bilge line
of a vessel.
This tunnel is of metal, it is closed at the stern end by a moveable water tight
trap or fastening and at its other end in convenient proximity to the main steam
pipe it terminates in a vertical cylinder or chamber which contains the before mentioned
metal air piston or float of somewhat smaller diameter than the said cylinder or chamber.
This metal air piston is fitted with a piston rod which passes through an orifice fitted
with a lubricator in the centre of the cover of the vertical cylinder or chamber.
The piston rod is also guided by an upper bearing. The metal air piston or float
is fitted on its outside with four or more rollers which by running against the inside
of the vertical cylinder or chamber ensure easy vertical action.
The cover of the vertical cylinder or chamber is perforated around the lubricator
and these perforations are preferably fitted with small tubes screwed therein which
while facilitating the rising of the water in the vertical cylinder or chamber when the
vessel's stern rises to a sea also prevent spilling of the water when the vessel rolls
in the trough. A strong metal spring is attached to the piston rod above the
cylinder cover to prevent the air piston or float sinking beyond a proper depth.
Another strong spring is fitted to the piston rod on the top of the air piston or
float cover to prevent any force when the air piston rises from striking unduly on the
cylinder cover.
J
A double or forked shaft attached on either side of the piston rod works directly on
a small crank or lever attached to the spindle of the throttle valve.
The governor is regulated by the quantity of water in the horizontal tunnel or
cylinder to suit the height of the sea running at the time, this is effected by two
(or more if necessary) large and powerful taps, the one admitting water from without
the vessel into the bilge tunnel, the other discharging the water from the bilge
tunnel into the different pump wells.
When the governor is not in use the trap at stern of the tunnel and one in front
of the vertical cylinder or chamber can be opened when the bilge water will flow in
its ordinary way to the various pump wells.
The length of the bilge tunnel must be in proportion to the length of the
steam ship.
And in order that the said invention may be more clearly understood and readily
carried into effect I will proceed aided by the accompanying drawings more fully. to
describe the same.
DESCRIPTION OF THE DRAWINGS.
The drawing is a diagram representing apparatus constructed according to the
invention.
✗ represents the main steam pipe.
A is a metal air piston or float working within a vertical cylinder or chamber B
connected with a horizontal tunnel or cvlinder (on the hilme line of a vessel

page_text: This horizontal tunnel or cylinder C is of metal, it is closed at the stern and
bow ends by moveable water tight traps or fastenings D and at its bow end in
convenient proximity to the main steam pipe X it terminates in the vertical cylinder
or chamber B which contains the before mentioned metal air piston or float A of
somewhat smaller diameter than the said cylinder or chamber.
This metal air piston or float A is fitted with a piston rod A' which passes
through an orifice fitted with a lubricator in the centre of the cover of the vertical
cylinder or chamber B.
The piston rod A¹ is also guided by an upper bearing E. The metal air piston.
or float A is fitted on its outside with four or more rollers A² which by running.
against the inside of the vertical cylinder or chamber B ensure easy vertical
action.
The cover B of the vertical cylinder or chamber B is perforated around the
lubricator and these perforations are preferably fitted with small tubes B2 screwed
therein which, while facilitating the rising of the water in the vertical cylinder or
chamber B, when the vessel's stern rises to a sea, also prevent spilling of the water
when the vessel rolls in the trough.
:
A strong metal spring F is attached to the piston rod A' above the cylinder-
cover B¹ to prevent the air piston or float A sinking beyond a proper depth.
Another strong spring G is fitted to the piston rod A¹ on the top of the cover
of the air piston or float A to prevent any force when the air piston rises from striking
unduly on the cylinder cover B¹.
A double or forked shaft H attached on either side of the piston rod A' works
directly on a small crank or lever I attached to the spindle J of the throttle.
valve.
The governor is regulated by the quantity of water in the horizontal tunnel or
cylinder C to suit the height of the sea running at the time, this is effected by two.
(or more if necessary) large and powerful taps (10³ the one (C¹) admitting water
from without the vessel into the bilge tunnel C, the other (C2) discharging the water
from the bilge tunnel into the different pump wells.
When the governor is not in use the traps D at the ends of the horizontal tunnel or
cylinder can be opened when the bilge water will flow in its ordinary way to the
various pump wells.
The length of the bilge tunnel must be in proportion to the length of the steam
ship.
The piston rod A¹ of the air piston or float A instead of acting directly on the
crank I of the spindle J of the throttle valve may work upon auxiliary machinery
interposed between the same and the crank of the throttle valve in a similar manner
to that adopted in steam steering gear the action of the water in the vertical cylinder A
regulating the action of the whole.
This employment of intermediate machinery, between the piston rod A¹ and the
throttle valve crank is only necessary in very long ships, gear of this kind not being
required in ships of 320 feet in length and under.
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. In governors or apparatus for regulating the supply of steam to screw engines
on the rise and fall of the screw an air piston or float connected directly or indirectly
with the throttle valve crank and working within a vertical cylinder at one end of a
horizontal tunnel or cylinder containing water which latter by the motion of the vessel
operates such air piston or float and consequently the throttle valve substantially as
herein shown and described.
2. In governors or apparatus for regulating the supply of steam to screw engines on
the rise and fall of the screw a horizontal water tunnel or cylinder fitted with supply
and discharge taps and with a moveable water tight trap at each end, a vertical cylinder

page_text: attached to and communicating with one end of such horizontal cylinder, an air piston
or float working within such vertical cylinder, a guided and lubricated piston rod
attached to such piston or float and connected directly or indirectly to the throttle
valve crank, antifriction rollers on the sides of the air piston or float, a spring on the
top of air piston or float, a spring on the piston rod above the cover of the vertical
cylinder, perforations in the latter cover, and short tubes fitted in such perforations
substantially as herein shown and discribed.
3. In governors or apparatus for regulating the supply of steam to screw engines
on the rise and fall of the screw, the combination and arrangement of parts substantially
as herein shown and described.
Dated this 18th day of July 1890.
B. J. B. MILLS.
By Harris & Mills,
23, Southampton Buildings, London, Agents.