Improvements in Governors for Steam or other Fluid Motors.
Year: 1894

page_text: Date of Application, 1st Nov., 1894
Complete Specification Left. 1st Aug., 1895-Accepted. 7th Sept., 1895
PROVISIONAL SPECIFICATION.
Improvements in Governors for Steam or other Fluid Motors.
HAROLD FREDERICK CROSSLEY WHITEHEAD of No. 136 Heaton Moor Road,
Heaton Moor, in the County of Lancaster, Mechanical Draughtsman does hereby
declare the nature of this invention to be as follows:-
This invention has for its object the application to centrifugal governors of the
pendulum or other type, of an appliance whereby such a governor is rendered self
regulating, in as much that when responding to the fluctuations in speed of the
motor it is controling, the amount of resistance against which the centrifugal forces
are acting is automatically varied and rendered equal to the centrifugal forces
exerted at any point throughout the whole range of the governor's action.
To accomplish this end I apply to the governor a spring or other elastic medium
which will exert a definite pressure against a piston contained in a cylinder, which
piston is free to move within such cylinder in response to the pressure exerted
against it, but is controlled in its movement by some suitable Huid in the manner
common to dash pots.
The piston is connected by suitable means with the counterpoise, spring or other
medium which forms the resistance against which the centrifugal forces act and in
such a manner that a movement of such piston, caused by the said spring or other
elastic medium, increases or decreases the amount of such resistance in proportion
to the increase or decrease of the centrifugal forces developed, throughout the
whole range of the governor's action.
Dated this Thirtieth day of October 1894
Improvements in Governors Ior Steam or other Fluid Motors.
I, HAROLD FREDERICK CROSSLEY WHITEHEAD, of No. 136, Heaton Moor
Road, Heaton Moor, in the County of Lancaster, Mechanical Draughtsman, 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 the application to centrifugal governors of the
pendulum or other type, of an appliance whereby such a governor is rendered self-
regulating, in as much that when responding to the fluctuations in speed of the motor
which it is employed to control, the amount of resistance against which the
centrifugal forces are acting is automatically varied in consequence of the effect of
the operation of such centrifugal forces so that such resistance is adjusted or made
equal to the centrifugal forces exerted at any point throughout the whole range of
the governor's action, so that the governor shall be regulated in the manner
requisite.
To accomplish this end I apply to the governor a spring or other equivalent
elastic medium which will exert a definite pressure variable according to the
compression or tension to which such spring or equivalent elastic medium, is

page_text: subjected, against a piston contained in a cylinder which piston is free to move
within such cylinder in response to the pressure exerted against it, but is
controlled in its movement by some suitable fluid in the manner
dash-pots.
common to
The piston is connected by suitable means with the counterpoise, spring or other
medium, which forms the resistance against which the centrifugal forces.net, and in
such a manner that a movement of such piston increases or decreases the amount of
such resistance in proportion to the increase or decrease of the centrifugal forces
developed throughout the whole range of the governor's action.
One form of governor constructed according to my invention is.illustrated in
the accompanying drawing, in which
Fig. 1 is a vertical section of such governor with certain parts shown in side
elevation in order that the construction of such governor may be more clearly
shown, and
Fig. 2 is a side elevation in part a vertical section taken on the plane indicated
by the line X X of Fig. 1 of part of the governor illustrated in Fig. 1.
In the accompanying drawing, (a) is the shaft upon which the governor is
mounted and by which it receives motion from the steam or other fluid motor in
conjunction with which it is employed. The shaft (a) is mounted in any suitable
bearing and supported in any suitable manner.
(b) (b) are the balls or weights of the governor. Each of the balls or
weights (b) is mounted fast upon one arm of one of two bell-crank-levers (c), the
other arm of which is embraced by one of two links (d) each of which embraces
one of two lugs or projections (e¹) formed upon a collar (e) mounted and capable of
being slidden lengthwise of a hollow part of the shaft (a). Each bell-crank-
lever (c) is secured by means of a set-screw upon an axle (c') which extending at
both sides of the bell-crank-lever (e) with which it is used is mounted and capable
of being oscillated at each end in a bearing formed in one of two arins (f') provided
to receive such axle (c). The two pairs of arms (1) are formed upon a collar or
boss (f) secured upon and receiving motion from the shaft (a). In each bell-
crank-lever (c) there is secured by means of a set screw a pin (2) which passing
into and being capable of being oscillated in bearings formed in the link (d) used
with such bell-crank-lever (c) serves to connect such bell-crank-lever (c) and
link (d) together and in each lug or projection (e¹) there is secured by means of a
set-screw a pin (2) which passing into and being capable of being oscillated in
bearings formed in the link (d) with which such lug or projection (e') is used,
serves to connect such link (d) to the collar (e) and thus the movements of the
balls or weights (6) are caused to be communicated to the collar (e). The collar (e)
is connected by means of pillars or ties or bolts (9) to a collar (h) which is formed
in two parts screwed together and so formed as to be provided with a groove (¹)
and is capable of being slidden lengthwise of the shaft (a) which is provided with
a key or feather (a¹) engaging with a groove formed in the collar (h) so that the
collar (h) must always turn with the collar (e). If it be considered desirable
'the collar (e) may be provided with a groove or key or feather and a key or feather
or groove to act in conjunction therewith may be provided upon or in the shaft (a).
The groove (¹) in the collar (h) serves to receive the jaw or ring or other
analogous device by means of which the downward and upward movements of the
collar (h) caused by the inward and outward movements of the balls or weights (b)
are communicated to the throttle-valve or other valve or part by means of which
the governor acts to control the motor in conjunction with which it is employed.
In the upper part of the shaft (a) is formed a cylinder (i) in which is a piston (j)
fitting such cylinder (i) and capable of being slidden therein. The cylinder (i) is
provided with a cover (1) screwed into such cylinder (i) and between the cover (i)
of the cylinder (i) and the piston (j) is compressed to a suitable extent a spring (k)
which bears at one end against the piston (j) and at the other end against the
cover () of the cylinder. A piston-rod (m) which passes through the cover (i)
of the cylinder (i) and is capable of being slidden lengthwise through such

page_text: cover () is secured to the piston (j) by means of a nut (m³) which is screwed upon
the piston-rod (m) and caused to bear against the lower surface of the piston (5) so
as to make a tight joint therewith. The piston-rod (m) is made hollow and
provided with openings (A) in order that through the lower part of the channel (B
formed in such piston-rod (m) and the openings (A) in such piston-rod (m) there
may be communication between the part of the cylinder () which is above the
piston () and the part of the cylinder (i) which is below the piston (j) in order
that the cylinder (i) and piston (1) may act in the manner of a dash-pot, a suitable
quantity of oil or other suitable fluid being placed in such cylinder (i). In order
that the speed at which oil or other fluid may pass through the channel (B) and
openings (A) in the piston-rod (m), from the part of the cylinder (i) which is above
the piston () to the part of the cylinder (i) which is below such piston ()) or in
the opposite direction may be regulated or adjusted as may be necessary or
desirable from time to time, there is provided a spindle (a) which being situate in
the channel (B) of the piston-rod (m) may be adjusted into position therein by
means of a set screw (o) screwed into such piston-rod (m) and is provided with a
conical end capable of acting in conjunction with the edge of an opening (C)
formed in the lower part of the nut (m) which is formed with a cavity (D) which
when the said nut (m³) is screwed upon the piston-rod (m) is in communication
with the central channel (B) formed in such piston-rod (m) and so with the part of
the cylinder (i) which is above the piston (j). A spring (p) bearing at its lower
end against the bottom of the cavity (D) in the nut (m') bears at its upper end
against a collar formed upon the spindle (n) and tends to raise the conical end of
such spindle from the opening (C), and thus by the set screw (o) being screwed in
one direction or the other the spindle (n) may be caused to close the opening (C)
to a greater or less extent so as to allow oil or other fluid to pass from the part of
the cylinder (i) beneath the piston (j) to the part of such cylinder (i) above the
piston () or from the part of the cylinder (i) above the piston () to the part of
such cylinder (i) below such piston (7), with more or less difficulty. The set
screw (o) is provided with a lock-nut (o) by which it may be secured in position in
the piston-rod (m).
Around a tube (3) formed upon the upper part of the collar (e) and capable of
sliding upon the hollow part of the shaft (a) so as to guide the collar (e) thereon,
is placed a spring (g) which bears at its lower end against a flange (e) formed
upon the collar (e) and at its upper end bears against a flange formed upon a
collar (r) surrounding the piston-rod (m) and formed with a rib or projection (r)
serving to keep the spring (q) in proper position. The spring (9) is compressed to
a suitable extent between the collar (e) and the collar (r) by means of a nut (s)
screwing upon the piston-rod (m) and bearing against the collar (r) and secured in
position upon the piston-rod (m) after adjustment thereon by means of the lock
nut (s) screwed upon the piston-rod (m). The lower surface of the nut (s) is
formed in the shape of a portion of a sphere and the upper surface of the
collar (2) is formed with a hollow of corresponding form to bear against the nut (s)
in order that the collar (r) may be able to move in relation to the piston-rod (m)
so as to bear properly upon the spring (g). The springs (k) and (g) may be
equally stiff or one of them may be made stiffer than the other as may be
considered preferable in. any case according to the circumstances in which the
governor may be intended to be employed.
When the spindle (n) is in such position in relation to the nut (m³) that oil or
other fluid may pass from the part of the cylinder (i) above the piston (j) to the
part of such cylinder (2) below the piston (j) the piston (j) is capable of moving in
the cylinder (i) under the influence of any upward or downward pressure exerted upon
it and therefore so long as the spindle (n) is in such position that a portion of the
oil or other fluid in the cylinder (i) may pass from the part of the cylinder (i)
above the piston (j) to the part of such cylinder (i) below the piston (j) or from
the part of the cylinder (i) below the piston (j) to the part of the cylinder (i)
above the piston (j) a movement of the balls or other weights (b) into any position

page_text: will cause the piston (j) to move upwards or downwards in the cylinder (i),
according to the direction of the pressure exerted upon it, until after a greater
or less time after the said movement of the balls or weights (6) according to the
rate at which oil or other fluid may be allowed to pass through the opening (C)
such piston () occupies such position in the cylinder (i) that each of the two
springs (k) and (7) is compressed with the same force. When the steam-engine
or other fluid motor in conjunction with which the governor illustrated in the
accompanying drawing is employed is set in motion the shaft (a) will be caused to
revolve and when the speed at which the shaft (a) is caused to revolve is such
that the upward pressure upon the collar (e) caused by the centrifugal forces due
to the revolution of the balls or weights (b) and the arms on which they are
mounted becomes greater than the downward pressure exerted upon the collar (e)
by the spring (9) such spring (y) will be compressed and the collar (e) and the
collar (h) will be moved upwards until by the effect if any of the raising of the
collar (h) upon the speed of the steam-engine or other fluid motor with which
the governor is employed and by the increased compression of the spring (9) and
its reaction upon the said collar (e) the collar (e) is caused to take up a position
such that the increased downward pressure of the spring (9) upon the collar (e)
becomes equal to the upward pressure upon the collar (e) caused by the centrifugal
forces due to the revolution of the balls or weights (b) and the arms upon which
they are mounted and the placing of such collar (e) in such position will through
the collar (7) and the piston-rod (m) cause the piston (j) to exert an increased
upward pressure upon the spring (k) so as to tend to further compress it, and the
piston () being allowed to move upwards at a speed regulated by the rate at
which the oil or other fluid used in the cylinder (i) is allowed to pass through the
opening (C) the further compression to which the spring (k) was subjected in the
said upward movement of the collar () will eventually be distributed between
the two springs (k) and (g) in accordance with the degrees in which such
springs (k) and (g) are respectively compressible, so that the spring (9) will
be somewhat less compressed than it was when first the said collar (e) was
moved into the said position. In a similar manner any further increase in the
angular velocity of the shaft (a) causing a further increase in the centrifugal
forces due to the revolution of the balls or weights (b) and the arms
which they are mounted will first cause the collars (e) and (h) to be moved
upwards and then the effect, if any, of the movements of the collar (h) upon the
speed of the steam-engine or other fluid motor and the increased compression of
the spring (9) and its reaction upon the collar (e) will cause such collar (e) to take
up a position such that the increased downward pressure of the spring (9) upon
the collar (e) shall be again equal to the upward pressure upon the collar (e)
caused by the centrifugal forces due to the revolution of the balls or weights (b)
and the arms upon which they are mounted and then in due time the further
compression to which the spring (k) was subjected in the further upward movement
of the collar (e) will be distributed between the spring (4) and the spring (y) in
accordance with the degrees in which such springs (k) and (g) are respectively
compressible, so that the spring (9) shall be somewhat less compressed than it was
when first the collar (e) was moved into such position. The governor illustrated
in the accompanying drawing must obviously be so connected to the means by
which it acts upon the steam-engine or other fluid motor in conjunction with
which it is employed that by the movements of the balls or weights (6) into
different positions between the innermost positions into which they are to be
permitted to pass and the outermost positions into which they are to be permitted
to pass, the requisite effects upon the speed of the steam-engine or other fluid
motor in conjunction with which the said governor is to be employed may be
produced. If while steam or other motive fluid is being supplied to the steam-
engine or other fluid motor in conjunction with which the governor illustrated in
the accompanying drawing is employed the speed of the said steam-engine or other
fluid motor should from any cause fall below the speed at which it is desired that
on

page_text: such steam-engine or other fluid motor shall work the centrifugal forces due t
the revolution of the balls or weights (b) and the arms on which they are mounted
will become insufficient to exert an upward pressure sufficient to resist the down-
ward pressure exerted by the spring (9) upon the collar (e) and such spring (1)
will first cause the collars (e) and (4) to be moved downwards and then the effect,
if any, of the movement of the collar (h) upon the speed of the steam-engine or
other fluid motor and the reactions between the upward and downward pressures
exerted upon the collar (e) will cause such collar (e) to take up a position such
that the decreased downward pressure of the spring (g) upon the collar (e) shall
be equal to the upward pressure upon such collar (e) caused by the centrifugal
forces due to the revolution of the balls or weights (b) and the arms upon which
they are mounted, and then in due time the spring (k) will expand until the
reduction of the compression of the spring (q) due to the downward movement of
the collar (e) will be distributed between the two springs (9) and (k) in accordance
with the degrees in which such springs (9) and (k) are respectively compressible so
that the spring (9) will be somewhat more compressed than when the collar (e) was
first moved into such position.
From the preceding description of the manner in which the governor illustrated
in the accompanying drawings operates it is obvious that when the shaft (a) is
revolving at any speed sufficient to cause the upward pressure upon the collar (e)
caused by the centrifugal forces due to the revolution of the balls or weights (6)
and the arms on which they are mounted to be sufficient to cause such collar (e)
to be raised above its lowest position in opposition to the downward pressure
exerted upon such collar (e) by the springs (k) and (9) the upward pressure upon
the collar (e) caused by the centrifugal forces due to the revolution of the balls
or weights (6) and the arms on which they are mounted is counterbalanced by the
downward pressures exerted upon the collar (e) by the springs (k) and (y).
Therefore by the use of springs (k) and (q) of suitable compressibilities the
downward pressure exerted by such springs (k) and (g) upon the collar (e) in
different positions of such collar (e) may be made to bear any suitable relation to
the upward pressure upon such collar (e) caused by the revolution of the balls or
weights (b) with any particular angular velocity in the positions corresponding to
the said positions of the collar (e) that is to say that according to the properties
which it is desired to give to the governor the springs (k) and (g) may be made of
such strength and elasticity that the balls or weights (b) and the arms upon which
they are mounted when revolving in any position at one particular speed shall,
by the centrifugal forces due to their revolution, exert upon the collar (e) an
upward pressure exactly equal to the downward pressure exerted upon the
collar (e) by the springs (k) and (9) when the said balls or weights (b) are placed
in such position, or the said springs (k) and (4) may be made of such strength and
elasticity that if the said balls or weights (6) be made to revolve at one uniform
speed in different positions the increase or decrease of the centrifugal forces due to
the revolution of the balls or weights (6) and the arms on which they are mounted
caused by changes in the positions of such balls or weights (/) shall cause a greater
or less proportional change in the upward pressure upon the collar (e) due to such
centrifugal forces than will be caused in the compression of the springs (k) and (y)
by the collar (e) being placed in the different positions corresponding to the
different positions in which the balls or weights (b) are caused to revolve at such
speed. Thus the governor illustrated in the accompanying drawing may be so
made that if it continue to revolve at one particular uniform speed the balls or
weights (6) shall remain in any position in which they may be placed in order that
the governor will always tend to cause the steam-engine or other fluid motor with
which it is employed to run at one uniform speed or the said governor may be so
made as to cause the steam-engine or other fluid motor with which it is employed
to run with any desired degree of increased or decreased speed when the pressures
exerted by the springs (k) and (4) upon the piston (j) have become equalised
after the collar (e) has been moved into any position by the balls or weights (b)

page_text: being caused to change their position either by an increase or by a decrease
in the angular velocity of the shaft (a) as may be considered desirable.
When the springs (k) and (q) are of such strengths and compressibilities that if
the governor illustrated in the accompanying drawing be caused to continue to
revolve at one particular uniform speed the balls or weights (b) shall remain
stationary in any vertical position in relation to the shaft (a) in which they may
be placed the piston () being only able to move at a speed regulated by the extent
to which the spindle (n) is made to close the opening (C) the variations in the
compression of the spring (q) due to changes in the position of the balls or
weights (b) caused by changes in the angular velocity of the shaft (a) are prevented
from being immediately transmitted to the spring (k) and thus the collar (e) must
maintain any position into which it is moved in consequence of any change in the
position of the balls or weights (b) for some time before the variation in the
compression of the spring (9) caused by such change in the position of the collar (e)
is divided between the two springs (g) and (k) and thus the governor is rendered
stable as well as sensitive. By means of the set screw (o) and the nut (s) the
governor illustrated in the accompanying drawing may be adjusted as may be found
necessary or desirable after such governor is applied to a steam-engine or other
fluid motor.
It in any case it should be considered unnecessary to provide means by which the
rate at which oil or other suitable fluid may be allowed to flow from or to the part
of the cylinder (i) above the piston () to or from the part of such cylinder (i)
below the piston (1) may be regulated the spindle (n) may be dispensed with and
a simple hole of suitable size be provided for the flow of oil or other suitable fluid
from or to the part of the cylinder (i) above the piston (j) to or from the part of
the cylinder (i) below the piston (j).
In the preceding description of the governor illustrated in the accompanying
drawing, no reference has been made to the effect of the weight of the collar (e)
and the various parts supported thereby but it is obvious that the weight of such
parts does produce a certain amount of effect in the action of the governor and thus
to some extent modifies the effect of the action of the springs (k) and (g) but it is
also obvious that if it should be considered desirable the weight of the collar (e)
and the various parts supported thereby may be counterbalanced by a weight or
weighted lever mounted upon or connected to a suitable part of the means by which
the governor is connected to the parts which it moves in order to control the
steam-engine or other fluid motor in conjunction with which it is employed and
that when allowance has been made for the effect of the weight of the said parts
the action of the springs (k) and (g) is substantially as has been above described
and that the employment of the spring (k) and the piston (5) controlled in its
movement in the cylinder in which it is mounted by means of oil or other suitable
fluid enables the resistance against which the centrifugal forces due to the revolution
of the balls or weights (b) and the arms on which they are mounted to be varied
and adjusted to the different centrifugal forces exerted at the various points within
the range of the governor's action, so that the governor shall be automatically
regulated in the manner requisite.
It is obvious and I would have it understood that what is ordinarily termed
a dead weight or any other medium capable of acting in a suitable manner as
a resistance to the centrifugal forces due to the revolution of the balls or weights
of the governor may be employed in place of the spring (9) and that instead of the
balls or weights (6) being mounted upon arms directed upwards, arms directed down-
wards may be employed to carry the balls or weights (b). It is obvious and I would
have it understood that instead of the spring (k) illustrated in the accompanying
drawing a spring made to act in tension or any other equivalent elastic medium capable
of exerting a definite pressure variable according to the compression or tension to
which it is subjected against the piston (7) may be employed if the other parts of
the governor be arranged in a corresponding manner, and that in such cases also
the employment of the said spring (k) or other equivalent elastic medium and the

page_text: piston (j) controlled in its movement in the cylinder (i) in which it is mounted by
means of oil or other suitable fluid enables the resistance against which the
centrifugal forces due to the revolution of the balls or weights of the governor are
acting to be varied and adjusted to the different centrifugal forces exerted at the
various different points within the range of the governor's action, so.that the
governor shall be automatically regulated in the manner requisite.
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 a centrifugal governor for a steam or other fluid motor, the hereinbefore
described appliance for causing the resistance against which the centrifugal forces
due to the revolution of the balls or weights of the governor act to be automatically
varied in consequence of the movements of the balls or weights of such governor
and consisting in the combination of a spring or other elastic medium capable of
exerting a definite pressure, variable according to the compression or tension to
which such spring or other elastic medium is subjected and a piston which is subject
to the pressure of such spring or other elastic medium and is contained and free to
move in a cylinder in response to the pressures exerted upon it but controlled in its
movements by some suitable fluid in such cylinder and is connected to the counter-
poise, spring or other medium constituting the resistance against which the
centrifugal forces due to the revolution of the balls or weights of the governor are
required to act, all arranged employed and operating for the purposes and
substantially in the manner hereinbefore described.
2. In a centrifugal governor for a steam or other fluid motor, the herein before
described appliance for causing the resistance against which the centrifugal forces
due to the revolution of the balls or weights of the governor act to be automatically
varied in consequence of the movements of the balls or weights of such governor
and consisting in the combination of a spring or other elastic medium capable of
exerting a definite pressure variable according to the compression or tension to
which such spring or other elastic medium is subjected, a piston (1) which is subject
to the pressure of such spring or other elastic medium and is contained and free to
move in a cylinder in response to the pressures exerted upon it but controlled in its
movements by some suitable fluid in such cylinder and is connected to the counter-
poise, spring or other medium constituting the resistance against which the
centrifugal forces due to the revolution of the balls or weights of the governor are
required to act, and means by which the action of the fluid in the said cylinder in
controlling the movements of the said piston may be regulated as may be
desirable from time to time, all arranged employed and operating for the purposes
and substantially in the manner herein before described.
3. In a centrifugal governor for a steam or other fluid motor the hereinbefore
described appliance for causing the resistance against which the centrifugal forces
due to the revolution of the balls or weights of the governor act to be automatically
varied in consequence of the movements of the balls or weights of such governor
and consisting in the combination of a spring (k) capable of exerting a definite
pressure variable according to the compression or tension to which such spring (k)
is subjected and a piston () which is subject to the pressure of such spring and is
contained and free to move in a cylinder in response to the pressures exerted upon
it, but controlled in its movements by some suitable fluid in such cylinder and is
connected to the counterpoise, spring or other medium constituting the resistance
against which the centrifugal forces due to the revolution of the balls or weights of
the governor are required to act, all arranged, employed and operating for the
purposes and substantially in the manner hereinbefore described.
4. In a centrifugal governor for a steam or other fluid motor the hereinbefore
described appliance for causing the resistance against which the centrifugal forces
due to the revolution of the balls or weights of the governor act to be automatically
varied in consequence of the movements of the balls or weights of such governor-

page_text: and consisting in the combination of a spring (k) capable of exerting a definite
pressure variable according to the compression or tension to which such spring (k)
is subjected a piston () which is subject to the pressure of such spring and is
contained and free to move in a cylinder in response to the pressures exerted upon
it, but controlled in its movements by some suitable fluid in such cylinder and is
connected to the counterpoise, spring or other medium constituting the resistance
against which the centrifugal forces due to the revolution of the balls or weights
of the governor are required to act, and means by which the action of the fluid in
the said cylinder in controlling the movements of the said piston, may be regulated
as may be desirable from time to time, all arranged, employed and operating for
the purposes and substantially in the manner hereinbefore described.
5. In a centrifugal governor for a steam or other fluid motor the herein before
described appliance for causing the resistance against which the centrifugal forces
due to the revolution of the balls or weights of the governor act to be automatically
varied in consequence of the movements of the balls or weights of such governor
and consisting in the combination of a spring (k) capable of exerting a definite
pressure variable according to the extent to which such spring (k) is compressed
and a piston () which is subject to the pressure of such spring and is contained
and free to move in a cylinder in response to the pressures exerted upon it, but
controlled in its movements by some suitable fluid in such cylinder and is connected
to the counterpoise, spring or other medium constituting the resistance against
which the centrifugal forces due to the revolution of the balls or weights of the
governor are required to act, all arranged, employed and operating for the purposes
and substantially in the manner hereinbefore described.
6. In a centrifugal governor for a steam or other fluid motor, the herein before
described appliance for causing the resistance against which the centrifugal forces
due to the revolution of the balls or weights of the governor act to be automatically
varied in consequence of the movements of the balls or weights of such governor
and consisting in the combination of a spring (k) capable af exerting a definite
pressure variable according to the extent to which such spring (k) is compressed,
a piston () which is subject to the pressure of such spring and is contained and
free to move in a cylinder in response to the pressures exerted upon it, but controlled
in its movements by some suitable fluid in such cylinder and is connected to the
counterpoise, spring or other medium constituting the resistance against which the
centrifugal forces due to the revolution of the balls or weights of the governor are
required to act, and means by which the action of the fluid in the said cylinder in
controlling the movements of the said piston may be regulated as may be desirable
from time to time, all arranged, employed and operating for the purposes and
substantially in the manner herein before described.
Dated this Thirty-first day of July 1895.
HOWARD
CHEETHAM,
Manchester, Agent to the Applicant.