IMPROVEMENTS IN THE CONSTRUCTION AND APPLICATION OF MARINE GOVERNORS
Year: 1881

page_text: LETTERS PATENT to John George Herbert Batchelor, of Liverpool, in the
County of Lancaster, Marine Enginee, for an Invention of "IMPROVEMENTS
IN THE CONSTRUCTION AND APPLICATION OF MARINE GOVERNORS."
PROVISIONAL SPECIFICATION left by the said John George Herbert
Batchelor at the Office of the Commissioners of Patents on the 31st December
1881.
JOHN GEORGE HERBERT BATCHELOR of Liverpool in the County of Lancaster
Marine Engineer. "IMPROVEMENTS IN THE CONSTRUCTION AND APPLICATION OF
MARINE GOVERNORS."
This Invention relates to that class of governor which derives its controlling
power from the momentum of a wheel driven by the engine to be governed.
In accordance with this Invention the wheel is mounted direct upon the engine
shaft and is kept in its proper position by two discs (one on each side of it) which
are clamped or keyed fast on the shaft. One of these discs has two or more stops
or projections cast upon it which engage with projections on the momentum wheel
and prevent the latter from moving round upon the shaft more than about an
eighth part of a turn, the wheel being free to revolve round, the shaft as its centre
for that small distance. The other disc carries two steel springs of a shape known
as the C spring which engage with pins in the momentum wheel and keep it up
against the stops in the position in which the throttle valve is oped. Now so long
as the speed of the engine is uniform the wheel revolves with the shaft, being kept
up to the forward stops (as they may be called) by the pressure of the springs the
valve remaining open. But should the speed of the engine suddenly increase, the
inertia of the wheel prevents this speed being transmitted to it until it has
compressed the springs and then the back stops come into play and force it round
with the shaft. This motion of the wheel is transmitted to the throttle valve of
the engine by means of a sliding collar loose on the shaft but connected to the
ת.

page_text: wheel by two liuks or rods with joints at their ends and also connected to the
disc which carries the springs by two similar links. These links are of such a
length and are so connected that any movement of the wheel upon the shaft in the
manner above described causes the collar to slide on the shaft either nearer to or
further from the wheel as the case may be and the movement of the collar is
transmitted to the valve by means of a ring which fits in a groove in the collar.
This ring has two projections to one of which the rod which is connected to the
valve is fixed. The other projection slides on a guide rod fixed securely under the
shaft which while allowing the ring to slide with the collar along the shaft
prevents it from turning round with the latter.
In order to prevent the governor from opening the valve too quickly I employ
two catches which engage with the wheel when in the shut position of the valve.
These catches are kept in place by the centrifugal force of weights attached to
them so long as the engine is revolving at an increased speed, but disengage and
allow the governor to open the valve so soon as the centrifugal force is sufficiently
diminished by the decreasing speed of the engine.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said John George Herbert Batchelor in the Great Seal Patent Office
on the 30th June 1882.
JOHN GEORGE HERBERT BATCHELOR of Liverpool in the County of Lancaster
Marine Engineer. IMPROVEMENTS IN THE CONSTRUCTION AND APPLICATION OF .
MARINE GOVERNORS."
This Invention relates to that class of governor which derives its controlling
power from the momentum of a wheel driven by the engine to be governed.
In accordance with this Invention the wheel is mounted direct upon the engine
shaft and is kept in its proper position by two discs (one on each side of it) which
are clamped or keyed fast on the shaft. One of these discs has two or more stops
or projections upon it which engage with projections on the momentum wheel and
prevent the latter from moving round upon the shaft more than about an eight
part of a turn, the wheel being free to revolve round the shaft as its centre for that
small distance. The other disc carries two steel springs of a shape known as the
C spring which engage with pins in the momentum wheel and keep it up against
the stops in the position in which the throttle valve is open. Now so long as the
speed of the engine is uniform the wheel revolves with the shaft, being kept up to
the forward stops (as they may be called) by the pressure of the springs the valve
remaining open. But should the speed of the engine suddenly increase, the inertia of
the wheel prevents this speed being transmitted to it until it has compressed the
springs and then the back stops come into play and force it round with the shaft.
This motion of the wheel is transmitted to the throttle valve of the engine by
means of a sliding collar loose on the shaft but connected to the wheel by two
links or rods with joints at their ends and also connected to the disc which carries
the springs by two similar links. These links are of such a length and are so
connected that any movement of the wheel upon the shaft in the manner above
described causes the collar to slide on the shaft either nearer to or farther from
the wheel as the case may be and the movement of the collar is transmitted to the
valve by means of a ring which fits in a groove in the collar. This ring has two
projections to one of which the rod which is connected to the valve is fixed. The
other projection slides on a guide rod fixed securely under the shaft which while
allowing the ring to slide with the collar along the shaft prevents it from turning
round with the latter.
In order to prevent the governor from opening the valve too quickly I employ
two catches which engage with the wheel when in the shut position of the
valve.
These catches are kept in place by the centrifugal force of weights attached
to them as the engine is revolving at an increased speed but disengage and allow
the governor to open the valve so soon as the centrifugal force is sufficiently
diminished by the decreasing speed of the engine.
And in order that my Invention may be clearly understood and readily carried
into practice I will proceed to describe the same more particularly by the aid of the
accompanying Drawings which represent a governor made in accordance with my
Invention suitable for a screw propeller engine of 500 nominal horse power.

page_text: also be placed at any other convenient part of the shaft or on a false shaft bolted
to the forward end of the engine shaft.
a is the momentum wheel which is made in halves and with flanges so that it
can be bolted together as are the other parts of the governor which encircle the
shaft. This wheel is made an easy fit so as to move freely round the shaft; b, is a
dise, also made in halves but bolted or otherwise made quite fast to the shaft. c is
a sliding collar or sheave likewise made in halves, this collar is loose on the shaft
so that it moves easily along it. The collar c is connected to the wheel a by two
links d d and also to the disc b by two similar links d d. These links are shown
in detail in Figure 8.
The dotted lines in Figure 1 show the position of the disc the links and the
sliding collar with regard to the wheel a when the throttle valve is closed by the
action of the governor.
The collar c has a deep groove all round it in which slides a strap or metal ring e
shown in detail in Figure 7. This ring is made in halves like an eccentric strap
and bolted together in its place in the groove of the collar c. It carries two
projections, one above in the shape of a stud or pin which carries the rod for
working the throttle valve, and another below like an elongated lug with a fork at
the end which engages a guide rod fixed to the tunnel floor as shown at g, Figure 3.
This arrangement is for the purpose of preventing the ring e from turning round
with the rest of the governor while allowing it to move in the direction of the
length of the shaft.
Figure 2 shows a back view of the governor; a is the momentum wheel with its
flanges for bolting the two halves together.
is a second disc keyed fast to the shaft close to the wheel a. To this disc are
fixed two springs i, i, by the pins j, j, the other ends of the springs are by similar
pins connected_to_the_wheel_a. This view shows the position of the disc h and
the springs, with regard to the wheel a when the throttle valve is open.
Figure 6 shows the position of the same parts when the valve is closed by the
action of the governor.
The disc h may with advantage be reduced to a flanged ring merely, so as to
leave the back of the governor open for oiling the springs.
A view of this disc is given in Figure 9, showing the position of the spring pin
holes.
Figure 3 shows a side view of the governor. The letters correspond to the same
parts in all the Figures. f is the rod which connects the governor to the throttle
valve. The dotted lines show the position of the different parts when the throttle
valve is shut by the action of the governor.
. Figure is a front view of the governor with the sliding collar c and links
dd a' d' removed for the purpose of showing the stops 7, 7, on the wheel a and
which allow the wheel to move on the shaft through about the one eighth part of
a revolution when they come in contact with the stops k, k, at the ends of two slots
in the disc.
This is the whole stroke (as it may be called) of the governor, so that when the
engine suddenly doubles its rate of speed, (which is just about what they do
continually in a head sea), the throttle valve is fast closed while she is making one
fourth of a revolution.
Figure 5 is a longitudinal vertical section of Figure 3 the rod f the links d d d' d'
and guide rod y being omitted; a is the wheel, b front disc, c sliding collar, e the
strap or ring, h the back disc, s the shaft.
I
A piece of leather india rubber or other soft material may be fixed against the
stops k, l, so that the sudden action of the wheel a may not cause an undue strain
on the other parts of the governor.
The springs should have a certain amount of tension on them when fixed in their
normal position and any movement of the wheel from that position should give a
somewhat increased tension.
Having thus described the nature of my Invention and the manner of performing

page_text: or carrying the same into practice I would remark that I do not limit myself to
the exact details hereinbefore described so long as the novel character of my
Invention is retained at the same time I do not claim any of the mechanical parts
separately which are well known and in common use, but what I claim is
The improved construction arrangement and application of governors to marine
engines in which the shaft of the engine itself carries a momentum wheel such as a
or its mechanical equivalent, driven round through the medium of springs fixed to a
disc keyed fast on the shaft, the momentum whicel itself being free to revolve on
the shaft for about the one eighth part of a revolution, the limit being defined by
stops on the wheel coming in contact with stops on a disc keyed or otherwise
secured to the shaft, and in which arrangement the fluctuations or irregularities in
the revolutions of the shaft, are caused to operate on the throttle valve, through the
medium of links, a sliding collar a strap or ring and rods combined so as to act
substantially as and for the purpose hereinbefore described and represented in
the Drawings hereto annexed.
In witness whereof I the said John George Herbert Batchelor have hereunto
set my hand and seal this Second day of June in the year of our Lord One
thousand eight hundred and eighty two.
J. G. HERBERT BATCHELOR. (L.S.)