IMPROVEMENTS IN APPARATUS FOR GOVERNING STEAM AND OTHER ENGINES to be as follows
Year: 1885

page_text: I ROWLAND RACKHAM of the Foundry Works, Walton-on-the-Naze in the
County of Essex Engineer do hereby declare the nature of my invention for
"IMPROVEMENTS IN APPARATUS FOR GOVERNING STEAM AND OTHER ENGINES to
be as follows
—
"2
This invention has for its object to control the admission of steam air or other
gases to engines provided with variable expansion valves or throttle valves and the
improvements relate to centrifugal governors of the kind described in the specifi-
cation of a former Patent granted to me N° 7919 in the year 1834 in which a
flanged weight surrounds the governor spindle and is upheld on rollers carried by
two links which are jointed to the spindle and which as in an ordinary centrifugal
governor diverge as the speed increases
To improve the action of such governors I make the links to cross one another,
that is I joint the two links to two short arms projecting from opposite sides of
the spindle as in the governor described in the before mentioned specification, but
in place of allowing each link to hang down and carry its weight on the same side
of the spindle as that to which it is jointed I make it to cross the spindle so that
the pulley which forms its weight may come on the opposite side of the spindle
I also make the pulleys with side flanges to run on webs or feathers projecting
from the underside of the flange of the weight by which means steadiment and
freedom from cross friction on the joints of the arms is obtained
To the bottom of the weight I couple a loose ring which carries a rack or racks
preferably two racks on two of its opposite sides The toothed racks I make to
gear into toothed quadrants which are fixed on a spindle from which motion can
be transmitted by suitable gear to the spindle used for varying the position of the
cut off slides of a slide valve such as described in the specification of my former
Patent or if the governor is applied to a throttle valve the quadrant spindle
might be extended and made to operate either a ring or piston valve in the
ordinary way
Preferably in order to obtain an earlier or later cut off I use ordinary flat
or cylindrical valves fitted with right and left hand screws as described in the

page_text: specification of my former Patent, and I transmit motion from the quadrant
spindle of the governor by fixing upon it another quadrant making this quadiant
to gear with a pinion on a second spindle which can be led away in any desired
direction and from which motion can be given in any desired manner to the screw
spindle of the valve.
COMPLETE SPECIFICATION
Improvements in Apparatus for Governing Steam and other
Engines.
I ROWLAND RACKHAM of the Foundry Works, Walton-on-the-Naze in the
County of Essex Engineer 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 'control the admission of steam air or other
gases to engines provided with variable expansion valves or throttle valves and
the improvements relate to centrifugal governors of the kind described in the
Specification of a former Patent granted to me N° 7919 in the year 1884 in which
a flanged weight surrounds the governor spindle and is upheld on rollers carried by
two links which are jointed to the spindle and which as in an ordinary centrifugal
governor diverge as the speed increases.
To improve the action of such governors I make the links to cross one another,
that is I joint the two links to two short arms projecting from opposite sides of
the spindle as in the governor described in the before mentioned specification, but
in place of allowing each link to hang down and carry its weight on the same side
of the spindle as that to which it is jointed I make it to cross the spindle so that
the pulley which forms its weight may come on the opposite side of the spindle
I also make the pulleys with side flanges to fun on webs or feathers projecting
from the underside of the flange of the weight by which means steadiment and
freedom from cross friction on the joints of the arms is obtained
To the bottom of the weight I couple a loose ring which carries a rack or racks
preferably two racks on two of its opposite sides The toothed racks I make to
gear into toothed quadrants which are fixed on a spindle from which motion can
be transmitted by suitable gear to the spindle used for varying the position of the
cut off slides of a slide valve such as described in the specification of my former
Patent or if the governor is applied to a throttle valve the quadrant spindle

page_text: might be extended and made to operate either a ring or piston valve in the
ordinary way
Preferably in order to obtain an earlier or later cut off I use ordinary flat or
cylindrical valves fitted with right and left hand screws as described in the
Specification of my former Patent, and I transmit motion from the quadrant
spindle of the governor by fixing upon it another quadrant making this quadrant
to gear with a pinion on a second spindle which can be led away in any desired
direction and from which motion can be given in any desired manner to the screw
smundle of the valve
In order that my said invention may be fully understood and readily carried
into effect. I will proceed to describe the drawings hereunto annexed
In order that my said invention may be fully understood and readily carried
into effect. I will proceed to describe the drawings hereunto annexed
DESCRIPTION OF THE DRAWINGS
Figure 1 is a side elevation and Figure 2 is a front elevation partly in section of
governing apparatus constructed in accordance with my invention. Figure 3 18 an
horizontal section on the line A. B in Figure 1 Figure 4 is an elevation and
Figure 5 is a vertical section showing a modification Figure 6 is a vertical section
of another form
Referring to Figures 1. 2 and 3 a a 18 the framing supporting the governor
6 is a vertical spindle driven from the engine in any convenient manner as by
bevilled gear 6 bª The spindle b carries a cross head b³ co are arms Jointed to
the cross head and carrying at their lower ends the roller weights d d € 18 &
heavy weight revolving with the spindle 6 but free to move up and down upon it
el is a flange upon the weight, it has guide tracks eª e² on its underside along which
the rollers can run. The arms cc pass through holes provided for them in the
flange e¹ and these holes are of such dimensions as to allow the requisite freedom
of movement.
In consequence of the arms crossing from side to side they become inclined at an
angle which is favorable to the action of the governor
The
According to the speed of rotation of the spindle the rollers diverge more or less
and in so doing they raise the weight e Moving up and down with the weight e
is a sleeve which is prevented from rotating by a straight guide as shown
sleeve has rack teeth f¹ upon it and these engage with toothed quadrants g upon
an axis which also carries a quadrant g².
The quadrant g³ turns a pinion h¹ on an axis h and this movement is transmitted
to an expansion valve or other gear to control the engine it may for example be
geared with a throttle valve by intermediate shafting and bevilled wheels
The modification shown by the Figures 4 and 5 18 a counterpart of that already
described
The rising and falling weight is replaced by a stationary part and the spindle b
is made free to descend against the resistance of a spring
The spindle being the moving part now carries the collar with the rack through
which motion is imparted to the valve
In these figures is the framing it carries the gear shaft 2 which by pinions /¹
and m¹ drives the part m corresponding to the main weight in the previous figure
n is the vertical spindle revolving with the part m but capable of moving up and
down in it n¹ is the crosshead on the spindle carrying crossed arms oo by which
are suspended the weight rollers p p and these rollers bear on the under side of
the flange m² on the part m as previously described n³ is a second crosshead on
the spindle n it carries pistons n³, and against these pistons the coiled springs 9 9
operate they replace the action of gravity on the weight in the previous arrange-
ment and drawing the spindle upwards press the rollers p p against the flange m³
T is the sleeve with the rack upon it transmitting the movement of the governor
to the controlling valve in any convenient way
In the further modification shown in Figure 6 the spindle is directly connected
with a throttle valve as the drawing indicates

page_text: Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim 18
1 A governor with crossed arms carried by a rotating spindle, such arms
supporting rollers or weights which being thrown outwards by centrifugal force
operate against a flange or surface to produce a relative movement which 18
transmitted to the controlling parts of the engine substantially as described
2 The means of transmitting the motion of the governor to the controlling
parts of the engine consisting in a loose ring or sleeve on the rotating and
traversing part of the governor and teeth upon the said ring or sleeve gearing with
a toothed are or pinion substantially as described.
1
3 Governors substantially as described and represented by the annexed drawings,
Dated the 99nd der of Feb 188A
CARPMAEL & Co,
Agents for the Applicant.