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Nov. 5, 1946.
D. L.. zE'lGLÃr-:R
Filed June 22,`1944
2 sheets-sheet 1
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Patente Nov. 5, V1946 ’
Delbert L. Zeigler, Rockford, Ill., assignor to
Woodward Governor Company, Rockford, lll., al
corporation ol' Elinois
' Application .lune 22, 1944, Serial No. 541,542
3 Claims.
(Si. 264-73)
This invention relates generally to governors
having mechanism operable while the governor is
operating to adjust the governor speed setting.
end against the valve stem head i3, and at its
upper end against a plunger 2t guided for move
ment axially of-the speeder spring.
One object is to provide a governor having' a
plurality of speed adjusting mechanisms inter
connected in a novel manner to enable the speed
setting to be adjusted in predetermined inere
ments and also progressively.
The re
duced lower, end of the plunger slides in a bore
25 in ahorizontal partition 2€ in a casting 2l
having a skirt fitting' over the ilyballs and se
cured to the top of the »casing lll, The casting
El is formed with a central vertical bore whose
>wall 28 forms a guide for the larger upper end
Another object is to provide for Yactuating one
of the adjusting mechanisms manually andthe il) of the plunger di which is movable upwardly and
other by a ñuid pressure actuator. '
downwardly to respectively increase and decrease
The invention also resides in the simple con
lthe governor speed setting. An adjustable stop
struction of the adjusting mechanisms and their
screw 25 'threading through a cover 3i! on the
novel arrangement with the governor into a coin
pact unit.
casting il serves to limit the upward plunger
Other objects and advantages of the invention
will become apparent from the following' detailed
description taken in connection with the acconi~`
Figure 1 is a vertical sectional View- or" a gov~
Fig. l.
Fig. 3 is airagmentary view similar to Fig. ‘i
showing a different position of the parts,
In the drawings, the invention is shown‘íor ’
purposes of illustration embodied in a centrifugal '
governor in which the controllingiorce is derived
centrifugally by the rotation or" ñyweights
These project upwardly and are fulcrumed on
pins E on a ball-head l ñxed to the upper end oi?
a drive sleeve 8 which is journaled- in a bore ä
in a casing lo. The sleeve projects from the 35
lower end of the'casing and is coupled to the
rotary parts whose speed is to be measured.
l2 whose inner race supports the head i3 on a
members ¿il and 32 disposed on opposite sides of
the plunger ät and guided for vertical reciproca
tion in hores 33 and 3d formed in the casting
il parallel to the ‘ocre 23.
The motions of the
, member are transmitted differentially to the '
Horizontal arms H on the flyballs bear up
- wardly against the outer race of a ball bearing
effected by movement of either of two actuating
panying drawings, in which
ernor embodying the novel features of the pres
ent invention, the section being taken along the
line l-l of Fig. 2.
Fig. 2 is a section taken along the line E-ä of
Such axial adjustment of the plunger may be
plunger through a lever 35 fulcrumed lntei'-,
mediate its ends on the plunger 2i with> its ends
plvotally connected to the respective actuating
members. Herein, the lever constitutes a spur
gear projecting through a transverse slot 35 in 'the .
plunger' and registering slots 3l in the bores 33
and Sil. arcuate series of teeth 33 and 3d on the
ends of the gear element mesh with rack teeth
dâ' and @l formed on the adjacent sides ofthe
actuating members.
The gear is fulcrumed on '
anti?rictien bearings di’ received on steel shafts
'43 pinned tothe plunger 2t and projecting into
the slot 3S.
vWith the diñerential connection thus provided
between the plunger andthe two actuating mem
bers, it will be apparent that _when either mem
ber is held iixed, the lever A35 will fulcrum> about
this member and the plunger will move up and '
down as the other member is raised and lowered. ,
stem lll reciprocable endwise in the sleeve 8 and
carrying lands lâ and I6. These coact respec
tively with ports ll and with the lower end oi
The plunger motion will, of course, be half that
the sleeve bore I9. If, in response to a detected
of the actuating member.
vspeed increase, the valve stem ld is raised from Las 1n the present instance, the actuating mem
the position shown, iiuid delivered under pressure
ber 3i .is adapted to be moved manually and'by
-by a pump 20a to a supply chamber 2li ñows past
mechanical means. For this purpose, rack teeth
the Iand l5 and through a port'2l to a hydraulic
servo actuator 22. Lowering of the valve stem -
ad formed on one side of the member mesh with a
pinion d5 fast on a shaft ¿i8 which projects into
from the position shown allows duid from the 50 the casting 2l' and is journaled in bearings 4l.
servo lto drain past Íthe land i6 out of Vthe lower
On its outer end, the shaft carries a wheel »i8
end of the sleeve ß.
which may be turned through the mediumA of a
-The vertically directed force of the iiyballs is
„cable or the like. Downward movement of the
opposed by and balanced against the stress of a
3l is limited by a stoy t9, on the lower
coiled compression sp1-ing' 23 bearing at its lower 55 member
end of a rod 50 which projects’up through a
2,410,474: `
, (Fig.r 3) and through a ‘high speed range when
the member 32 is in its high speed position (Fig.
‘y chored in the cover 30.
Y. ì
,‘ 1 Disposed in a bore 52 in the member 3l is a « l). .By energizing the hydraulic actuator, the
-ì coiled compression spring 53 acting between a i, deflection of the Speeder spring .may be increased
ordecreased in a fixed increment and the speed
lower end wallr 54 and-a head 55 held by a snap
setting of the governor shifted from one range
-ring 5B on the upper end of a rod 5l projecting
-to the other. Such shift may be effected quickly
upwardly through and guided by the end 54 of
and is controllable from a remote point.
the member 3| and having a head 58 on its lower
I claim as my invention:
end. A screw-stop 68 on the cover 3o limits the
1. Agovernor comprisinga Speeder spring, ro
upward movement .of the rod _51. The spring 10 tary speed responsive means opposing the force ,
53 is made substantially stronger than the speeder
of said spring. a member mounted for movement
spring 423 so as to be capable of overcoming the
in a rectilinear path and in opposite directions
latter spring and moving the plunger 2d to a
to increase or decrease the force applied by
» j. predetermined lposition in therevent that the
cable or other part of the connections to the 15 said spring, a gear element mounted on said mem
‘; hole 5i in the member and is adiustably an
ber to turn relative thereto about an axis ex
- tending transversely of said path, said gear ele
" wheel 4B is broken. This position is determinedV
by the stops 68 and 59 agamt which the spring
ment having arcuate rows oi teeth arranged on
opposite sides thereof concentric with said axis,
Herein, the other actuating member 32 is ar
rack element meshing with said gear element on
ranged to be actuated by power controllable from
opposite sides’ of said member so as to have a
a> remote point. For this purpose, it is made in
rolling connection therewith, means guiding said
the form of a sleeve and closed at its upper end
elements for rectilinear movements parallel to
by a piston si) depressed as indicated at iii and
engageable with an adjustable screw stop 62 on - _said path, means selectively operable to movevone
the cover 34. A spring 66 enclosed within the 25 of said raclr elements back and forth between
opposite limit positions to vary the deflection of
sleeve 32 acts between the piston 6o and a -pro
said `spring in a fixed increment, and means by
.iection 63 on the partition 28 to supplement the4
which -said other rack element »may be moved
force of the speeder spring 23 in urging the sleeve
variable distances to adjust the stress
and piston upwardly toward the stop S2. The
member may be forced downwardly by admitting 30 of said spring progressively,
2. A governor comprising a speeder spring, ro
pressure fluid through a pipe Bt into the cylinder
speed responsive means opposing the force
34 between the cover 30 and the piston et. Under
spring, a member mounted for movement
pressure suñicient to overcome the spring 66 and
in a rectilinear path and >in opposite directions
the speeder spring 22J the piston is moved down
wardly until the lower end of“ the member 32 85 to increase or decrease the force applied by said
'52 expands when the memberl 3l is freed.
strikes a stop shoulder B1.
Let it be assumed that the parts are positioned
spring, a gear element mounted on said member
‘ _ to turn relative thereto about an axis extending
i as shown in Fig. 3, the spring SB-holding the
actuating member 32' upwardly against the stop
62 in the low speed position of the latter.
` ` Changes in the governor'speed vsettling may then
be made by turning the wheel 4a, thereby moving.
the member 3l up or down. In this movement,
the lever 35 fulcrums on the then ilxed member
I2 and the plunger 24 is moved in the same direc
tion as the member 3| but through half the
transversely of said path, said gear element hav
ing arcuate rows of teeth arranged on opposite
sidesthereof concentric with said axis, rack ele»
ments meshing with said gear element on oppo- _
site sides ofl said member so as to have a rolling
connection therewith, means guiding said ele
ments for rectilinear movements parallel to said
path; means for moving one of said rack elements
back and forth to fulcrum said gear element
about the other rack element and thereby move
distance. When the member 3l is in its lower said member, and means for actuating said otherl
limit position against the stop 49, the maximum
element to fulcrum said gear element about
speed setting obtainable by movement of thisv 60 rack
the iirst rack element and correspondingly move
member obtains. As the member is raised, the
' 4said member.
control speed of the governor is decreased pro
3. A governor comprising a resilient speeder
gressively. If the member 3l is raised above the
-element, rotary speed responsive means opposing
position at which the rod $1 engages the stop 59,
the spring 53 is compressed in the continued rise 55 the force of said element, a 'member guided for
movement in a rectilinear path and in opposite
' of the member to a high speed position which
directions to increase or decrease the force apmay be limited by stops (not shown) associated
plied by said element, a lever íulcrumed inter
with the cable actuator.
Now if it is desired to increase the governor .
speed setting quickly, fluid at a pressure sumcient
to overcome the springs 23 and 66 is admitted to 60
j the cylinder 24 whereupon the member 32 is
forced downwardly to its high speed position -
(Fig. 1). The lever 35 will fulcrum on the mem
ber 3i and the plunger 24 will be moved down
wardly a- corresponding distance further com
pressing the lSpeeder spring» 28 ~a iixed amountl
With the member 82 in its new position, the
member 3l may be moved up or down to _effect
mediate its ends on said member to turn rela
tive thereto about an axis extending transversely
of said path, an actuating member pivotally con
nected to one end of said lever and guided-for
movement parallel to said 'path between two
spaced positions, a spring urging said actuating
member to one of said limit positions, power
actuated means adapted when energized to over
come said spring and move said actuating mem
ber to said other limit position, a second actu- .
ating member pivotally connected to the other
~ end of said lever, and mechanism selectively oper
In this way, the governor is adjustable 70 able to 4adjust the position of said second actu
, a further adjustment of the governor speed set
by the member 3| through a lower speed range
when the member 32 is in its low speed position
ating member progressively.
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