Year: 1899

page_text: Date of Application, 28th Feb., 1899
Complete Specification Left, 28th Nov., 1899-Accepted, 28th Feb., 1900
A communication from EUGENE AUBRAT, of Paris, in the Republic of France,
Engineer.
I, ARTHUR FREEMORE SPOONER, of 323, High Holborn, in the County of London,
Chartered Patent Agent, do hereby declare the nature of this invention to be as
follows:-
This invention has for its object to devise a governor which automatically gives.to
the machine to which it is applied the variations of speed according to a law, varied
as desired, in a continuous manner or by degrees; applicable when a machine ought
to follow according to a deterinined rule the variation of an element of the object of
working or to obtain for the government (quantity or quality) of an element of this
kind; either delivered level, at high elevation, pressure, tension etc., a state which
ought to be required and applicable in general for all apparatus necessitating a
variableness of determination of speed.
The mechanism consists of a governor astatic (that is to say in equilibrium in all
its positions) at all speeds, of which the weight, equilibrating the centrifugal force
of the balls, possesses two movements:-First, an angular movement around the
centre of oscillation of a lever (movement acting on the distribution of the force
of the machine) such that it determines the equilibrium in all positions. Second,
a radial movement, obtained in a continuous manner or by degrees, by the inter-
vention of a sustaining element of variation of the working which varies the polar
distance of the weight and determines the variation of speed of the machine
in leaving the operation of this weight completely foreign to all effort utilised for
its movement.
In carrying out my invention two levers (either straight or bent) are pivoted at
one point and turn with their power shaft. Each lever carries at its extremity a
ball or mass as usual.
At a certain point of each lever is arranged a small roller which slides in a guide-
way that forms part of the sleeve, which sleeve itself slides along the power shaft and
is carried with it in its rotation. In some cases the rollers may themselves constitute
the balls or masses. A suitably-fulcrumed lever is provided which carries on one
side a weight and on the other side a small roller which engages in a collar formed on
or fixed to the governor sleeve. The levers of the first and last-mentioned rollers are
equal.
A universal joint may in some instances unite the one axis with a second one.
The one axis mounted on the weight lever is prolonged by a screw which is
adapted to turn in a screw thread of the weight and thereby render the weight
movable along the lever. The second axis is located in proximity to the first one
and this is moved with the universal joint directly through the first one."
The movement of the second shaft is as follows:-A socket keyed to slide on the
said shaft is capable of being rendered independent or dependent of a second socket
by their engagement or disengagement in sliding the one socket on the shaft by
means of a handgear. An angle pin pressed on the socket by a tension, spring
adjustable by a screw offers a resistance to the rotation of the said socket. A pulley

page_text: enough for an ample utilization of a very weak arc, this difference being moreover
corrected through the tension of a weak spring abutting on the sleeve and on the
shaft and the tension of which is increased or decreased in the same time as the
difference tg. a-
sin a.
This spring may be employed in all the cases.
The guide-way may be placed indistinctly to its roller or to that of the weight
lever, being disposed at convenience.
It is possible to make on the guide-way a correction in the ratio: to the diameter
of the governor rollers and the weight lever which have been considered as the points,
or of differences of the same order.
One can also slide a roller of the sleeve in a channel of the lever, that which
constitutes a variant.
In one arrangement the balls, the sleeve and the levers equilibrate themselves by
gravity and in another the levers equilibrate themselves partially by centrifugal
force. The weights of these parts are now foreign to the equation of equilibrium.
In the arrangement at the horizontal axis, the weights of the balls equilibrate
themselves between them.
The speed of the machine can now be varied according to the equation :-
in the following manner;-The controlling chain, turning the pulley combined on the
axis stretches the spring and brings about the rotation of the two sockets, the one
offering resistance through the angle pin. When the spring has a desired tension,
it can overcome the resistance of the angle pin, and put the one axis into action,
which rotates the other axis and the weight displaces itself, thus varying the value
of P¹ and in consequence the speed according to equation (4).
The resulting moment at the pivot point of the weight lever designated X of the
effort employed by this movement, that is to say, the effort tending to turn around X
is nil.
The movement may be effected in two ways between two extreme limits.
The tension of the spring regulates the duration of the intermittances, that is
to say, the quantity of variation for which it is desired to influence the regulator.
The one socket being rendered independent through its disengagement with the
other socket, and the angle-pin spring being raised, the automatic action ceases, and
the regulator becomes adjustable by hand through the hand wheel.
The automatic action can be suspended by pressing the angle-pin spring on to the
block.
The shaft can be controlled in a continuous manner through a wheel which would
be directly keyed to it.
An arrow on the weight gives on a scale the reading of the number of revolutions
of the machine, for P being constant, the arrow indicates the value of P¹ of
the equation a wo²: b P¹.
-
Another arrow on the lever indicates on a sector the degree of admission. The
shaft being controlled, either in a continuous manner, or by degrees, without the
intermediary of the said wheels, and the movement resulting from the variations of
level or difference of level of water for example which is designated by h,

page_text: In the general case, one has according as the axis is moved by a chain mounted on
the one wheel alone, or by the intermediation of the two wheels and of the wheel
pulley, S being the variation of an element of some controlled apparatus ;
Another arrangement may be employed when the axis is moved by the hand
through handgear (or a small hand wheel) which is situated on the axis. The effort
which is there applied to this effect, passing through the axis of oscillation, its
moment (that is to say the effort tending to turn it around its axis) is nil through
ratio to this axis.
The variants to control the shaft will now be indicated, such shaft carrying a wheel
of which the median plane passes through the axis X.
The wheels have different axes of rotation mounted on the governor-sleeve. This
sleeve can turn on itself around the axis X in such a manner that the one wheel can
take up the inclination of its engaging wheel. The teeth of this wheel have a
curved form permitting to the weight lever free oscillation. The effort received
through this wheel passing through the axis X, its moment is nil.
According to another arrangement the control of the weight P is moved through a
rack which is in contact with it, and which moves a small pinion.
It has been seen in the operation of the governor, the balls and the weights P
have in whatever way a parallelism of movement, and of action exercised on the
sleeve.
-
The equation (4) a w² bP shows that the governor has this characteristic
property that the speed w of the machine varies as the square root of the length of
the lever of the weight P.
The mechanism of variation of the speed is independent of the inechanism and
of the movements of the machine to which it is applied.
A communication from EUGÈNE AUBRAT, of Paris, in the Republic of France
Engineer.
I, ARTHUR FREEMORE SPOONER, of 323, High Holborn, in the County of London,
Chartered Patent Agent, 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:
This invention has for its object to devise a governing mechanism or regulator
astatic at all angular velocities, combined with a mechanical device for regulating the
variations of speed of a motor or engine, which device, by acting automatically upon
that part of the governor proper upon which the equilibrium of such governor
depends (without disturbing the operation of such part or varying the relation
between the number of revolutions of the engine and that of the governor)
automatically and directly imparts to the speed of the motor a value which may vary

page_text: accordance with any desired and predeterinined law, say, according to the varia-
tions of any giving driving medium from which it is assumed the mechanism derives
its initial movement.
In practice this driving medium (which is itself initially influenced from some
other source which may vary in its nature almost indefinitely and might therefore,
for instance, be a float, manometric spring, spring or counterweighted piston, electro-
magnet, or the like) imparts such initial influences to the speed varying device which,
through agencies peculiar to itself, will act upon the part whereby the governor is
balanced.
The mechanism consists in a system of governor astatic at all speeds, of which a
weight equilibrating the centrifugal force of the balls, possesses two movements,
namely, (1st) An angular movement about the centre of oscillation of a lever (move-
ment acting on the distribution of the force of the engine) such that it determines
the equilibrium in all positions, (2nd) A radial movement such that it varies the
polar distance of the weights, and determines the variations of speed of the
engine, eliminating the operation of the weight from all effort utilized for its move-
ment.
The invention is illustrated in the annexed drawings,
Figures 1, 2 and 3 representing alternative forms of the governor proper.
Figures 4, 5, 6, 7, 8, 9, 10 and 13 represent forms of the speed-varying device and
are arranged to explain the relation between the speed of the engine and any driving
medium. Figures 11, 12, 14, 15, 16, 17, 18, 19, 20 and 21 indicate some modifications
for the automatic variation of the speed of the engine.
In Figures 1, 2 and 3, the two levers 1 (straight in Figures 1 and 2 and bent in
Figure 3) are pivoted at o and turn with the shaft 7. Each lever carries at its
extremity a mass 3. At a certain point on each lever ] is arranged a roller 8. These
rollers 8 slide in guides 5 that project from a sleeve 10 which itself slides on the
shaft 7 and is carried with the latter in its rotary movement. (The mass of the
balls 3, may, for instance, in the construction shown in Figure 2, be formed in one
with the rollers 8). A lever 2, adapted to oscillate about the axis &, carries a weight 4,
and, at another point, a roller 9 which slides in the collar 6. The levers of the
rollers 8 and
may be equal. The collar 6 is connected to the sleeve 10 by a
connection 11.
The description of Figures 4, 5, 6, 7, 8 and 13 will next be proceeded with.
Figure 5 is a section on the line A, B, of Figure 4; Figure 7 is a section on the
line C, D of Figure 6, and Figure 8 is a section on the line E, F of the same
figure.
The universal or Cardan joint 12 (or the arrangement which is represented in
Figure 13 wherein 13 is a spherical cover, 14 a cleat carrying two cheeks or
slides 15-15, turning on the trunnions of the cleat and sliding in the cover) the
centre of support of which is at the point v situated on the axis of the oscilla-
tion of the lever, unites the axle 16 with a second axis marked 18 in Figures 4, 5
and 13, and 17 in Figure 6. The axle 16 mounted on the lever 2 has a screw-
threaded extension that engages with a screw thread of the weight 4 and causes the
said weight 4 to slide on the lever 2. The axis 16 is actuated through the universal
joint 12 directly by the shaft 17 Figure 6 or through any intermediary, such as a
shaft. 18 with pinions, see Figure 4.
The operation of the shaft 17, see Figures 6, 7 and 8, is as follows: The socket 19,
keyed to slide on the shaft 17 can be rendered independent or dependent of
the socket 20 by causing the socket 19 to slide on the shaft through a handgear. The
angle pin 21 pressed on the socket 19 by a tension spring 22 adjustable by the
screw 23 offers a resistance to the rotation of the socket 19. The pulley 24 is loose
on the axis as well as the socket 20. The extremities of the spring 25 are fixed, the
one part to the pulley 24 at 26, and the other part to the socket 20 at 27. The two
wheels 28 and 29 are of varying diameters, and may be provided with a toothed
periphery, see Figures 6 and 8. The wheel 28 is fixed to the loose pulley 24 and is
loose on the shaft 17. The two wheels 28 and 29 are connected by a chain 30 which

page_text: sin a
which the tg. is sin a)}
is sin a).
Now, the roller 9, parallel to the-displacement-of-the-sleeve describes the sine of
the angle. The angle described by the lever 2 is now the angle of which the tg.
is sin a, which is designated by a¹.
Then tg. a¹ sin a.
=
->
(1)
Supposing a section to be made in the sleeve and designated by f3 and 14 then
the respective actions parallel to the shaft of the masses 3 in rotating and of the
weight 4, will give―
₤3 = a w² sin a
making
f4
==
bP¹ tg. a¹
Pl
-
w2
or a wbp1
and by combining equations, 1, 2, 3 and 4
f3=f4
(2)
(3)
(4)
(5)
This equation of equilibrium being independent of the angle a, the governor
is astatic, that is to say, in equilibrium in all its positions for the values w and P
of the equation (4). And the equation (4) answering for the diverse values
of wand P, the governor is astatic at all speeds.
It is now to be proved for variable speeds. a and b are some values of the
form a¹ m and b₁ of which a and b₁ are some constants and m and some
m
m²
variables of which the ratio is constant or very little variable because of the very
near parallelism of movement of the levers 1 and 2; a weak spring as hereinafter
stated can give the corrections.
The guide 5 of the governor can be simply rectilinear and normal to the axis, the
governor is then pseudo-astatic that is to say in equilibrium in all positions to a value
approaching the difference between the sine and the tangent of the same angle a
(for in this case the angles a and a¹ are equal and the ratio is strictly constant).
a'm
b¹m!

page_text: This difference is moreover corrected by the tension of a weak spring abutting on the
sleeve and on the shaft and the tension of which increases or decreases in the same
time as the difference ig a
This spring can be employed in all cases.
-
sin a.
The guide 5 can be placed indiscriminately. to the roller 8 or to the roller 9,
according to convenience. On the guide 5 a correction in the ratio of the diameter
of the rollers 8 and 9, which have been considered as points, or of differences of the
same order, could be made.
As a modification the rollers 8 might be mounted on projections of the sleeve 10
and engage with channels or in the levers 1.
In the arrangement shown in Figure 1, the balls, the sleeve, and the levers
equilibrate themselves by gravity; in Figure 3 the levers equilibrate themselves
partially by centrifugal force. The weight of these organs is now eliminated from
the equation of equilibrium. In the adaptation to the horizontal axis Figure 2, the
weights of the balls equilibrate themselves between them.
The speed of the engine can now be varied according to the equation:
see Figures 4, 5, 6, 7, 8 and 13.
The controlling chain turning the pulley 24 loose on the axis 17, influences the
spring 25, and brings about the rotation of the sockets 20 and 19, the socket 19
resisting through the angle pin 21. When the spring 25 has acquired the desired
force, it can overcome the resistance of the angle spring pin 21, and put the axle 17
in action, which rotates the axle 16, and the weight 4 displaces itself, thus varying
the value of P¹ and in consequence the speed according to equation (4). The moment
with regard to the axis of the force employed by this movement, that is to say the
force tending to turn about the axis & is nil. The movement can be effected in two
directions between two extreme limits. The application of the spring 22 regulates
the duration of the intermittences, that is to say, the quantity of variation for
which it is desired to influence the governor. Upon the socket 19 being rendered
independent, through its disengagement with the socket 20, and upon the spring 22
being raised, the action of the automatic movement ceases, and the governor becomes
adjustable by hand through the hand wheel 33. The shaft 17 can be controlled in a
continuous manner by a wheel which should be directly keyed to it. The index 34
of the weight 4, on the scale 35, gives the reading of the number of revolutions of
the machine, because the weight 4 being constant, the index indicates the value of P¹
of the equation aw² bP. The index 36 of the lever 2 indicates on the sector 37
the degree of admission. The shaft 17 being controlled, either in a continuous
manner, or by degrees, without the intermediary of wheels 28 and 29, and the
movement resulting from the variations of level or of a difference of water level,
which is designated by h, this then gives
=

page_text: operation
2nd operation of P¹ operation of S and
49
It will be seen now that the law of the variations of speeds of the engine can take
all forms.
The speed-varying device is independent of the mechanism and of the movement
proper of the engine to which it is applied.
In Figure 9 an arrangement is indicated where the axis 16 is moved by the hand
through a handgear 39 or a small hand wheel which is situated on the axis. The
force which is there applied to this purpose, passing through the axis of oscillation
its moment (that is to say the force tending to turn the lever about its axis) is nil
with regard to this axis.
In Figures 10, 11 and 12 certain nodifications for controlling the shaft 16 are
shown. Referring first to Figures 11 and 12 the shaft 16 carries a wheel 40, the
median plane of which passes through the axis ; the wheels 41 and 42 of the one
part, and 43 of the other part have for their axes of rotation respectively 40 and 45
mounted on the sleeve 46. This sleeve 46 can turn on itself about the axis §, in such
a manner that the wheel 42 can take the inclination of the wheel 40 with which it
engages: The teeth of the wheel 40 have a curved form see Figure 12, permitting
the lever 2 to oscillate freely. The force received by the wheel 40, passing through
the axis, its moment is nil. Figure 10 represents the control-of-the-weight_4
that is moved by a rack 47 which is fast with it, and which moves a small
'pinion 48.
The modifications in the means employed for the mechanical variation of the
moment of the weight or of the value of the lever of the weight 4 (of the part of a
driving medium concernel in the application) and determining the automatic
variation of the velocity of the engine as the square root of this value, through the
movement of the weight 4 of the lever, are described with reference to Figures 14,
15, 16, 17, 18, 19, 20 and 21. In Figure 15 the pinion 60 and the rack 61 with
which it engages, are located on the lever 2 and follow its movement of oscillation.
The rack 61 and the stein 62 in prolongation of it are situated in the axis of
oscillation . The second pinion 63, keyed on the first one, controls the weight 4 by
the rack 64. The stem 62 carries a pivot with double collar 65, of very small
diameter. The rack and its stem possess a movement of translation in the axis of
oscillation as well as the pivot with double collar 65 which receives the movement
of the part of the driving medium concerned in the application. The pinions and
the racks are situated in the plane of the axis of oscillation, in such a manner that
the forces employed passing through the axis of oscillation, having a moment nil
with regard to this axis. The part not moving, carrying the collars of the pivot 65
and possessing the movement of translation, carries an elastic clutch 66 which can
ouly permit of action when the tension of variation has acquired a desired value.
The stem 62 being moved by any driving medium in use producing now automatically
the variation of the moment of the weight. This ordinary rack Figure 15 may be
replaced by a revolving shaft guiding the rack supported in the axis of oscillation on
the fixed support then existing in this part. The pinion which it drives turns freely
at the same time as the lever about the axis of oscillation and of the revolving rack
with which it constantly engages whatever may be the inclination of the lever. This
rack then possesses only a movement of translation in. the axis of oscillation and
controls the pinions which put the weight 4 in movement by the second rack.
The stem does not carry any pivot; the movement is given to it by any driving
in edium.
ン
In Figure 17, 67 and 68 are cranks keyed at 900 situated on the lever 2. 67 is
pivoted to the rod which controls the weight 4, and 68 is pivoted to a rod entering

page_text: into the axis and is connected to the small pivot 65 which actuated in its move-
ment of translation in the axis by any driving medium. One can then arrange a
flexible wire passing through the axis of oscillation and attach it to the weight 4
about to be displaced, after a return by small roller fixed to the lever and tangential
to the axis; the extremity of the wire situated in the axis being connected to the
nover through a small pivot. A piece of wire can pass to each side of the trunnions
of the axis of the lever, after a return of the one to the other side of the weight.
The second piece can be replaced by a spring fixing the weight to the lever and
resistant to the traction of the first piece.
In Figure 14, an electro-magnet 69 is fixed on the lever 2 and takes up the current
through two branches 70 of the lever, prolonged by the trunnions 71 of the axis &
which turn in the insulated rings 72 to which the electric conductors 73 are fixed.
The screw 74 and the hand wheel 75 permit of varying the position of the electro-
magnet on the lever. The armature 76 is fixed to the weight 4 by the screw 77,
which can be drawn into rotation by the stem 78 which slides in the screw, and by.
the hand wheel 79. The distance of the weight and of the contact 76 can be thus
varied, the screw turning at its two extremities in sleeves and the weight 4 sliding on
the lever. (The hand wheel 79 and the handle 75 are situated on the axis §). The
contact 76 is connected to the lever 2 by a spring 80. A variation of potential
determines now,
by the electro magnet, a displacement of the armature 76 and. in
consequence, of the weight 4; the production of current being in ratio with the
application of the apparatus.
In Figure 16, the lever 2 of the governor carries a manometric spring 81 being
supported in one part on the lever, where it takes the pressure through the tube 82,
and in the other part, fixed to the movable counterweight 4. The pressure in the
tube 82 is conveyed to the manometric spring 85 and is caused by passing through a
branch of the lever, to be prolonged exactly in the axis of oscillation through a
tube 83 of very small diameter. This tube traverses a pressure box 84 through two
packings, and its extremity is closed; it is pierced in the part within the box where
it communicates with it. This box can be closed and fastened along R S, and the
tube open at the extremity interior to the box. This box 84 admits the pressure in.
use by a tap or valve. The variations of pressure are exerted through the axial tube.
to the manometric spring which puts the weight 4 in movement.
In the following figures the moment of the weight, and the speed of the
engine, are varied mechanically through the movement of the axis of oscillation.
of the lever.
In Figures 18 and 19, a slide 90 of the lever carries an axis of oscillation 91; this
slide 90 is supported by a support 93, and by the same axis 91. This support 93 is
movable on a slide bar of fixed frame 94. The two toothed wheels 95 and 96 having
for axis 97 (common to the axis 91) turning together and engaging:-The first 95,
with a rack 98 fixed to the frame 94, the second 96, with a rack 99 of the lever 2.
The support 93 which can move on the slide of the frame 94, and which carries the.
axis of oscillation 91, is moved automatically by any driving, medium herein before
mentioned by means of any control, such as, for example, pinion 100, rack 101,
wheel 102, chain 103. The arrow 104 fixed to the support 93 traverses the scale 105.
of the fixed frame 94. (The support 93 would be able to carry some rollers for roll-
ing in contact with the fixed frame 94). This movement of the support 93, coming
from the part of any driving medium by the control of a pinion 100, gives by the
fixed rack 98 movement of rotation of the wheel 95 and involves the collar 90 of
the lever and of the axis 91; but the wheel 96 involved by 95 and engaging with the'
rack 99 of the lever, it results that this lever takes in its collar 90 a relative move-
ment equal and of inverse direction to the movement of support 93. It follows
that the support 93, the axis 91 and the collar find themselves in movement, but that
the lever 2 remains immovable (apart from its movement of oscillation which remains,
free about the axis 91. The value of the lever of the weight 4 finds itself now
varied mechanically by the automatic movement of the axis of oscillation.

page_text: The index 104 indicates on the scale 105 the number of revolutions of the machine
through the value of the moment of the weight.
The axis 91 of oscillation can be situated in another position such as 92 Figure 19
which is the point of contact of the rack and of the toothed wheel; the slide 90 will
then oscillate on 92 instead of 91. The axis 97 of the toothed wheels preserves the
same position.
In Figures 20 and 21, the support 93 which moves on the slides of the fixed
frame 94 carries a roller 107 on the axis 108. The lever 2 supports itself by its
face 109 on this roller. The mean circumference of the toothed wheels 95 and 96
engaging with their racks 98 and 99 corresponds to the circumference of the roller 107.
The action of the weight of the lever supports the lever on the roller 107 in its weak
rolling movement produced by its oscillation, in such a manner that the lever rolling
on the roller, the teeth of the wheels and of the racks engage constantly. The lever
oscillates about the line 112 of its contact with the roller. The support 93 is con-
trolled automatically by the driving medium giving the initial movement. In this
movement of the support 93, the toothed wheels turning in the same direction, the
lever is stopped (except its movement of oscillation which remains free) by the
wheel 96 which, moved by the wheel-95, annuls the impulse movement which will be
produced by the support.
In Figures 18, 19, 20 and 21 the racks would be diametrically opposed with regard
to the toothed wheels, in returning inversely between them the direction of rota-
tion of the wheels, by a common angle pinion.
Having now particularly described and ascertained the nature of the said invention
and in what manner the same is to be performed, as communicated-to-me-by-my
foreign correspondent, I declare that what I claim is :-
1. A governing mechanism or regulator astatic at all angular velocities comprising,
in combination, ball-levers 3, a lever 2 carrying a weight 4 and a sleeve 10, the
arrangement being such that it is characterized by a similitude of movement of the
ball-levers and of the weight 4 of the lever 2 equilibrating the centrifugal force of
the balls, the equilibrium depending upon the mass of the balls 3 and of the
weight 4, the balls the sleeve and the levers equilibrating between them by gravity
and their weights eliminating themselves from the equation of equilibrium.
2. The means for regulating the variations of speed of a motor or engine consisting
in actuating the weight 4 by means of a movement transmitted in passing through
the centre of oscillation of the lever carrying the weight 4, the property of which is
that the oscillation of the lever remains free and that the forces employed in this
movement of the weight have a moment nil with regard to the axis of oscillation, in
such a manner that the operation of the weight 4 is not altered by it, the said
movement through the centre being constituted by means such as a universal joint
the centre of support of which is situated on the axis of oscillation of the lever and of
which one of the sleeves controls the weight 4 and the other sleeve receives a
movement from another part.
3. The modifications of the controlling device referred to in the preceding claim,
operating through the centre of oscillation, comprising wheels and pinions, or pinions
and racks, or hand levers, by which the movement of simple translation, axial of any
driving medium, is conveyed to the weight through these forces passing through the
axis of oscillation and not having any moment with regard to this axis; or by the
action (a) of the condition of pressure of a liquid or gas or (b) of an electric current
transmitted and passing through the axis or (c) through the automatic movement of
the axis of oscillation of the lever, without perturbating effect on the operation of the
said weight.
4. In combination with the governing mechanism or regulator, astastic with
automatic variation of speed as claimed by the preceding claims, an addition to
the system of variation permitting of varying the speed according to any equation,
in transforming the relation of the movement of the weight 4, or of the universal

page_text: joint, of the one part, with the movement of the controlled driving medium of the
other part, this system being constituted by cones with variable diameters.
5. In combination with the governor, astatic with automatic variations of speeds,
as claimed in the preceding claims, the means of varying the speed by inter-
mittence or by degrees, by a spring which, affected by the controlled driving
medium against a determined resistance, such that the pressure of the spring of
an elastically mounted pin on a socket, can overcome the said resistance at a
given tension and cause only at this moment the movement of the weight and the
variation of speed.
6. The improvements in, and relating to, centrifugal governors substantially as
described and illustrated in the accompanying drawings.