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Патент USA US2406872

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Sept° 3, 1946.
‘
P. M. WAITE
2,406,872
THROTTLE CONTROL
Filed Dec. 4, 1942
PERCHARG
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6 Sheets-Sheet 1
Sept.~ 3, 1946.’
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‘
> P. M. WAlTE
Filed Dec. 4, 1942
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THROTTLE CONTROL
6 Sheets-Sheet 2
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3m 3,; 11946. ‘
P. M. WAITE
‘2,406,872
‘THROTTLE CONTROL
Filed Dec. 4, 1942
‘ 6 Sheets-Sheet 3
Sept. 3, 1946. a
P. M. ,WAITE
‘
’ 2,406,872
THROTTLE CONTROL
Filéd Dec. 4, 1942
v6 Sheets-Sheet'll
3,1946;-
P. M. wAlTé
-
‘
_
2’406’87'2
THROTTLE CONTROL
Filed Dec. 4, 1942
'
6 Sheets-Sheet 5‘
.
‘Sept. 3, 1946.
'
P. M. WAITE'
2,406,872
THROTTLE ‘CONTROL
Filed Dec. 4, 1942
‘S'SheetS-Sheet e '
Patented Sept. 3, 1946
2,406,872
"UNITED STATES PATENT OFFICE
2,406,872
THROTTLE CONTROL
Philip M. Waite, Corry, Pa.
Application December 4, 1942, Serial No. 467,882
4 Claims.
(01. 74-471)
1
2
This invention relates to a control device for in
ternal combustion engines and a variable pitch
embodiments of the invention, but it is to be un
propeller operated by the engine, and is an im
derstood that changes, variations and modi?ca
tions may be_resorted to which fall within the
provement over the construction embodied in my
scope of the invention as claimed.
copending application Serial Number 424,080,
?led December 22, 1941.
‘
Figure 1 is‘ a detail front elevation of a control
constructed according to‘ an embodiment of this
,
An object of‘ this invention is to‘ provide a
unitary control device which is adapted to regu
invention,
late the normal throttle for the engine, to regu
late the operation of the supercharger, and also
to regulate the propeller pitch in proportion to
Figure 2 is a vertical sectional view through the
19 device,
'
Figure 3 is a sectional view taken on the line
the throttle and supercharger operation.
3-4 of Figure 2,
Figure 4 is a fragmentary sectional view taken
Another object of this invention is to provide in
combination a movable throttle lever, a movable
propeller pitch regulating lever, and means core “
related with both levers for effecting accelerated ‘“
movement of the propeller, lever with respect to
on the line 4-4 of Figure 2,
,
Figure 5 is a fragmentary sectional view taken
on the line 5-5 of Figure 2,
'
Figure 6 is a sectional view taken on the line
the throttle lever upon initial movement of the
6-6 of Figure 1
throttle lever in one direction, and subsequently
effecting decelerated movement of the propeller
‘
In the drawings:
‘
Figure 7 is a sectional view taken on the line
20
lever with respect to the throttle lever during the
latter portion of they movement of the latter
lever in said one direction, the two levers having
complete movement through equal length arcs.
A further object of this invention is to provide ;,
in combination a‘movable ‘throttle lever, a mov
able supercharger lever, and means correlated
with both levers for initially effecting accelerated
movement of said supercharger lever with respect
to said throttle lever during the initial movement ,30
'l—-'! of Figure 2,
Figure 8 is a fragmentary side elevation of one
of the secondary lever operators,
Figure 9 is a fragmentary side elevation of a
modi?ed form of secondary lever operator,
Figure 10 is a diagrammatic view showing the
combination of the control with an internal com
bustion engine and a variable pitch propeller,
Figures 11 to 16 inclusive are diagrammatic
views showing the several positions of the main
and one of the secondary levers, and
Figures 17 to 20 inclusive arev diagrammatic
of the latter for effecting decelerated movement " ‘
views showing the several positions of the main
of said supercharger lever upon additional move
and the other of the secondary levers.
ment of said throttle lever, for arresting move
ment of said supercharger lever upon subsequent
Figure 21 is a front elevation, partly in sec
tion,
of a modi?ed form of this invention;
movement of
of both
said levers
throttle
at the
lever,
sameforspeed
effecting
upon
Figure 22 is a fragmentary sectional view taken
on the line 22-22 of Figure 21, and
?nal movement of said throttle lever to the ex
Figure 23 is a detail side elevation of the sec
treme position of the latter lever, the supercharg
ondary lever used with the modi?cation.
er lever being normally rearward of the throttle
lever when the latter is at its extreme position, v40 2 Referring to the drawings and ?rst to Figures 1
but the supercharger'lever being capable of in- ‘
to 8 inclusive, the numeral 25 designates generally
dependent movement from its normal rearward
position with respect to the throttle lever, to a po
sition laterally aligning with the throttle lever.
A further object of this invention is to provide
a main rock lever, at least a pair of secondary
a frame structure which includes a pair of inner
and outer frame members 26 and 21 which are
in the accompanying drawings wherein» are shown
means to secure the device on a support.
disposed in spaced apart relation.
The frame
member 26 includes a pair of upwardly divergent
arms 28 and 29. which have formed integral with
levers and means correlated with the main and
the lower or convergent ends thereof a bearing
secondary levers for effecting differential move
boss 3|]. The arm 28 is provided with a pair of
ment between the main and secondary levers, and
outwardly extending ears 3| and 32 which are
also differential movement between the several 50 ‘formed with openings 33 and 34 for receiving at
secondary levers.
,
v
taching bolts to secure the device on a suitable
The invention consists of the novel construc
support. The arm 29 is provided with a pair of
tion, combination and arrangement of parts as
outwardly directed ears 35 and 35 having openings
will be more speci?cally referred to and illustrated
31 and 38, respectively, for receiving attaching
2,406,872
3
The frame member 21 is of like construction
to the frame member 26 with the exception that
the attaching ears are omitted from the frame
member 21. The outer divergent ends of the
frame members 29 and 21 are connected together
the levers 54, 59 and 99 to thereby hold these
levers in their manually adjusted position with
respect to the bearing member 55.
by means of a connecting bolt 39 within which
with the movement of the main lever 54, I have
provided a secondary lever operator 78 which is
rockably mounted on the bearing member 55.
fastening members 49 and 4| engage. The lower
portions of the frame members 26 and 21 are
also connected together by means of a pair of
In order to provide a means whereby the sec
ondary lever 59 may have differential movement
The lower portion of the operator T6 is spaced
connecting bolts 42 and’ 43. A substantially sec 10 from the rear vside of the main lever 54 by means
of a spacing ring or washer TI and friction Wash
tor-shaped housing formed of sheet metal is
adapted to be disposed about the frame members“ '
ers l8 and 19 are disposed on opposite sides of
.the operator 19. The washer 78 is interposed be
26 and 2'! and includes a pair of upwardly diver-r
tween the ring or spacer ‘I7 and the forward side
gent walls 44 and 45 which have formed integral
with the upper ends thereof an arcuate wall/46. :15 of 'the operator ‘I9 whereas the washer ‘I9 is in
terposed between the spacing ring 63 and the rear
The lower end of the wall 44 is provided with a
side of the operator 16. The operator ‘I9 is
loop or tunnel 41 through which the bolt ‘42 is
formed with a radially and outwardly extending
adapted to engage. The lower end of the wall
body 89 which has formed therein an elongated
45 is formed with a loop or tunnel 48 through
which the'bolt 4-3 is adapted to engage.
20 slot 8|, the long axis of the slot 8| being radial to
the axial center oft'he bearing member 55. The
_ A front wall or plate 49 of substantially sector
operator "I6 also includes a r'earwardly offset
shape is adapted to engage against the front side
head 82, the details of ‘which are shown in Fig
of the front frame member 2-1, and a rear cover
ure 8.
'
'
59 is adapted to engage against the rear side
The head 182 is provided with an arcuate outer
of the rear frame member 26. The cap or' plate 25
edge portion 83 having‘a notch or keeper 94
'49’ 'is- formed wants marginal-flange 5| engaging
abou't'the housing '52‘ formed by the walls 135, 135
and 46 ‘and the .rear cover or plate 59 is ‘for-med
therein. The head 82 also includes oppositely
extending wings 85, the outer edge portions 88 of
which provide a cam ‘surface, the purpose for
with a marginal ?ange 53 engaging about the rear
marginal portion of the housing 52. The bolts 49 30 which will be hereinafter described. The sec
ondary lever 59 has mounted‘ on thefor'ward' side
and 4| provide‘ a means for ‘securing the plates
49 and 59, respectively, and thefbo‘l'ts 42 and 43
provide means for securing the. lowerportion of
the plate 44 on the frame structure.’
_
‘
»
thereof an elongated‘ plate 8'‘! which is formed with
upper and lower elongated openings 88 and ‘89. A
rear reinforcing plate '99 engages against the rear
A main throttle lever 54 is rockably disposed 35 side of the secondary lever 59'and the two plates
81 and ‘99 are secured'to ‘the opposite faces of
within the frame structure 25 being rockably
‘mounted on 'a tubular bearing member 55 which
the lever 59 by upper and lower bolts or fasten
is disposed between the twoframe members 29
ing members 9| and 92. The plate‘ '81 constitutes
portion with a bearing '5'! rockably engaging the
periphery of the sleeve or cylindrical bearing
lower end with a pawl or tooth 94 engageable
in the notch 84. The plate 8'! at its upper end
a latching plate and has secured to ‘the forward
and '27. The lever '54 is provided at;
upper
end-with a knob 59 and is provided at its’ lower__ 40 side thereof a block‘ 93 which is formed at its
is ‘formed with a ?nger engaging member 95
memberv 55. An extension 58 extends down
and.- is also provided with a pair of oppositely
wardly'from the bearing portion 51 of the lever
54 and provides a means for attaching the con 45 extending ‘e'ars'95 and 97. The rear plate 99 is
formed with a pairvo'f ‘ears 98 and 99 and a pair
nections between the lever 54 and the throttle
of springs I99 and I’9’I are connected to the ears
lever of the carburetor.
'
'
of the two plates 8'‘! and 99 andiconsta'ntly urge
A pair of secondary levers 5'9 and’ 99 are rock
the f-orwardl'atching plate 81 inwardly to nor
‘ably mounted on the cylindrical ‘bearing member .
55 on opposite sides of the main lever 54 and 50 mally maintain the bolt or tooth 94 in the keeper
er notch 84.
spaced laterally from the lever 54. The lever 59
The mainlever 54 has rockably mounted there
on ‘a pair of bell cranks I92 and I93, ‘the bell
ing connections to the-structure operated by the
cranks being mounted on pivot means compris~
lever 59, and in the present instance, the lever
59 is connected with the supercharger structure. 55 ing a headed sleeve I94 which is extended‘through
the ‘lever 54 and a headed screw "I95 ‘which is
A spacing washer 92 is interposed between the
threaded into the sleeve I94. Anti-friction balls
lever 59 and the forward side of the rear frame
is formed with a lower extension 9| for attach
member 29, and a second spacing member 53 is
vof'conventional construction are interposed be;
tween the heads of the sleeve I94, the bolt I85
disposed on the forward side of the lever 59. A
pair of friction washers 64 and 65 are interposed 60 and the adjacent sides of the bell cranks I92 and
9'9 and the adjacent sides of the'lever 5d. The
between the spacing washers’52 and 93 and the
bell crank I-'92 has rotatably mounted on one arm
adjacent sides of the lever 59. The bearing mem
thereof aroller I96 ‘which engages in the elon
ber 55 has mounted in an annular channel 95
gated opening ‘8|. The other arm of the bell
thereof a disc-shaped plate 91 formed with a
central opening 98 and the opposite or outer end 65 crank I92 has rotatably mounted thereon a ‘roller
I 9"! which engages in a ‘cam track I99 which is
of the bearing member 55 also has mounted in
formed in a longitudinally arcuate cam plate I991.
an annular channel 69 an outer disc-shaped
'The cam plate I99 is mounted'in the opposite ends
plate 19. The plate 19 has .a central opening
thereof on the bolts '39, and preferably, a spacing
‘II and a bolt 72 is extended through the open
sleeve H9 is interposed between the rear side of
ings 58 and ‘H in the disc members 61 and 19, ‘re
spectively, and is also extended through openings
the cam plate I99 and the rear frame member
‘i3 and ‘I4 which are formed in the frame mem
29.
bers 29 and 21. A nut ‘I5 is threaded onto the
The cam track I98 adjacent one end thereof
is formed with an enlarged track III, the pur
whereby the desired friction may be applied ‘to 75 pose for ‘which will be hereinafter described.
outer end of the bolt 12/an'd provides a means
.15
9,406,872
This enlarged track portion III extends inwardly
from the inner edge of the track I08 as shown
in Figure 4. The cam track I08 provides a means
whereby the bell crank I02 will be rocked on
the pivotal support thereof carried by the main
lever 54 when the main lever 54 is rocked or
moved and the particular con?guration of the
plate H9. The cam plate H9 is spaced from the
cam plate I09 by a spacing sleeve_I20 andvis
spaced from the forward frame member 21 by
means of a spacing sleeve I2I. The pawl H4 is
?xed to a pawlcarrier or elongated plate I122
which is spring-pressed by means of a pair of
springs I23 to latching position. The upper end
track I08 will determine the particular differen
of the carrier I22 is provided with a ?nger en
tial. movement effected between the main lever
gaging member I24 disposed in inwardly spaced
10 relation with respect to the knob I24. The ?nger
54 and the. secondary lever 59.
7 Referring now to Figures 11 to 16 inclusive,
engaging member 95 is also inwardly spaced from
the differential movement provided between the
two levers 54 and 59 arediagrammatically laid
a” knob I25 which is mounted on the outer end
out.
oflthe secondary lever 59.
. .
.
'
In Figure 11 the twolevers are in their
A spacing fring I26 is interposed between the
‘starting position and are laterally disposed in the 15 operator H3 and the forward side of the lever
same-plane. . In Figure 12 it will be noted that
54 and anti-friction washers I21 and I28 are in
the‘ secondary lever 59 is forwardly of the main
terposed between the spacer I26 and the lever
lever 54, the camtrack I08 being of such con
54 and the ring I26 and the operator II3 respec
?guration as to provide for an accelerated move
tively. A friction ring I29 is interposed between
ment of the secondary lever 59 for a portion of 20 the spacing ring 11 and the rear side of the lever
the movement of the main lever 54 from its initial
54. A spacing ring I30 is interposed between the
operator 1 I3 and the secondary lever 60, and a
secondary. lever 59 is accelerated through'an are
friction washer I 3| is interposed between the rear
greater than the arc of the movement of the main
side of the ring I30 and the forward side of the
lever 54 and the secondary lever 59 is in substan~ 25 operator II3. A friction washer I32 is interposed
tially .a vertical position, In Figure 13 it will
between therforward side of the spacer I30 and
be noted that further movement of the main lever
the rear side of the secondary lever 60.
.
54 from the dotted line position to the full line
A supplemental lever I33 is rockably mounted
position will provide for a decelerated movement
on the bearing member 55 forwardly of the sec
of the secondary lever 59, the secondary lever at 30 ondary lever 60 and is spaced‘ from the secondary
this point being. laterally in the same plane of
lever 30 by means of a spacing ring I34. A fric
the main lever 54. Further movement of the
tion washer I35 is interposed between the rear
main lever 54, as shown in Figure 14, will provide
side of the spacing ring I34 and the forward
for the independent movement of the main lever
side of ‘the lever 60 and a friction ring I36 is in
54 with the secondary lever 59 stationary. Addi- '
terposed between the forward side of‘ the spacer
tional movement of the main lever 54 from the
I34 and the rear side of the supplemental lever
position shown in Figure 14 to’the full line posi
I33. A forwardly disposed spacing ring I31 is
tion shown in Figure 15 will provide for a sub
interposed between the forward side of the lever
stantially equal movement between the two levers
I 33 and the lower portion of the frame mem
54 and 59. The position shown in Figure 15 is 4.0 ber 21. A friction washer I38 is interposed be
the ?nal position of the main lever 54 and the
tween the spacer I31 and the forward side of
full line position of lever 59 is‘ the normal posi
the lever I33. The lever I33 at its upper end
tion of the secondary lever 59 when operated
is provided with a forwardly projecting or right
angular portion I39 which projects through an
solely by the bell crank I02.‘ If itis desired to
move the secondary lever 59 forwardly an addi
elongated arcuate slot I40 formed in the cover
tional distance or in the same lateral plane as
plate 49. A knob I 4| is mounted on the forwardly
the main lever 54, the secondarylever 59 may
projecting portion I39 of the lever I33 and is
starting position. In the present instance, the
be pushed forwardly, this independent movement
of the secondary lever 59 being permitted by the
downwardly offset’ cam track portion III.
As the secondary lever 59 is independently
moved forwardly from its normal forward posi
tion, the bell crank I02 will rock on the pivot
thereof and the roller I01 will swing downwardly
into the offset track portion I I I. This is accom 55
Zlésposed in forwardly spaced relation to the plate
A longitudinally arcuate indicia bearing plate
I42 is mounted on the forward side of the plate
49 adjacent the upper portion thereof and is
provided with segments I43, I44 and I45 bearing
indicia to indicate the action produced by the
lever I33 in a selected one of its several posi
plished without unlatching the secondary lever
tions. The plate 49 adjacent the upper portion
59 from the operator 13. The extreme forward
position of the secondary lever 59 is shown in
in dotted lines in Figure 1, through which the
thereof may be formed with a cutout I46, shown
Figure 16 where the lever 59 is in the same lateral
knob I 4| may be extended at the time the cover
plane as the lever 54. The secondary lever 50 60 plate 49 is applied to the frame structure. The
which is provided at its upper end with a knob
plate 49 may be also provided with a forwardly
I I2 is adapted to have differential movement with
offset lower portion I41 which extends about the
respect to the main lever 54 under the swinging
forward end of the bolt 12 and the nut 15.
or rotary action of an operator I I3 which is simi
The lever I 33 is movable rearwardly of an elon
65 gated latching bar I41 which is secured between
lar in every detail to the operator 16.
The-lever 60 has slidable lengthwise thereof
the upwardly divergent arms of the forward
a dog or pawl I I4 engageable in the notch of the
frame member 21. The bar I41 is provided be
operator H3 in the same manner as the engage
tween the ends thereof with a pair of rearwardly
ment of the pawl 94 in the notch 84 of the head
extending lugs I48 and I49. The lugs I48 and
92. The bell crank I03 has a roller II5 on one
I49 are provided with cam-shaped rear sides I50
arm thereof which is disposed in an elongated
and I 5|, respectively, so that when the lever I33
opening IIB formed in the operator “3. The
is rocked on the bearing member 55, the lever I33
bell crank I 03 also has a second roller I I1 mount
will ride over the cam face I50 and be disposed
ed on the other arm thereof which is movable
in the space I52 between the two lugs I48 and
‘in. an elongated cam track II8 formed in a cam 75 I49. When the lever I33 is to be moved out of
rasoasva
8
the space I42. it must be forcibly pushed in
wardly from the upper end ‘thereof, the lever
I33 being of resilient material permitting it vto
be sprung rearwardly and when held in its rear
In the use and operation of this control .de
vice, in, the starting positions of the main lever
54 and the ‘two secondary levers 59 and 60, all
of these levers. ‘will be disposed at the extreme
ward position, the lever I33 may then be rocked
left position shown. in Figures .11 and 17. .For
forwardly an additional distanceras for instance,
to the position shown in Figure 7. When the
ward movement of the main lever I54 to the right
or in a clockwise direction will cause initial ac
celerated movement of the secondary levers 59
and 58‘ as shown diagrammatically in Figures
portions I56 and I5I, the particular cam por
tion will forcibly bend the lever I33 until the 10 12 and 18 for one phase or cycle ofv the main
lever 54. Additional forward movement of the
.lever drops on one side or the other of the cam
main lever 54 through another cycle will effect a
portion. The lever I33 constitutes a mixture
regulator for regulating the quantity of gasoline
decelerated movement of the secondary lever
59 and an equal movement of the lever 60. Fur
mixed with the air in the carburetor.
Referring now to Figure 9, there is disclosed .
ther forward movement of the main lever 54
amodi?ed form of secondary lever operator I53
will be effected without movement of the sec
ondary lever .59, as shown in Figure .14, and in
which .is formed with a head I54 similar to the
head 82 with the exception that the head I54
thisv same movement, the secondary lever 60 will
be on its deceleration cycle. Further movement
.is .formed with a plurality of notches I55. The
of ‘the lever 54 to its extreme right position,
notches I55 provide a means whereby a secondary
lever may be manually adjusted to any selected
which is the position shown in Figure 15, will
move the lever 59 at the same speed and through
position with respect to the main lever so that
‘the same are and in this are of movement of
the particular secondary lever may be either for
the main lever 54, the secondary lever 60 will be
wardly or rearwardly of the main lever 54 in the
starting positions of these levers. It will, of 25 on the ?nal movement of the deceleration cycle,
the latter lever being coplanar with the lever 54.,
course, be understood that the selected adjust
as shown in Figure 20.
ment of a secondary lever in its starting posi~
Lever 59 will be rearwardly of the lever 54, as
tion. will also effect the ?nal position of the par
shown in Figure 15 during the normal operation
ticular secondary lever produced by the cam
of ‘the lever 54. However, if it is desired to move
tracks I68 and H8.
lever 59 forwardly an additional distance, this
iIn Figures 17 to 20 inclusive, there are dis
may be ‘accomplished by manually rocking the
closed diagrammatically the several positions of
lever 59 forwardly to the position shown in Fig
the secondary lever 56 with respect to the main
ure 16. Where it is desired to move one of the
lever 54. In Figure 17, two levers 54 and 65 are
at the starting position and are laterally in the
secondary levers, as for instance, lever 59 inde
pendent of the main lever 54, this may be ac
same plane. The ‘cam track I i8 is so constructed
complished by‘ unlatching the secondary lever 59
as to provide for ‘the initial accelerated move
from the operator 16. If, as an example, the
mentof the secondary lever 65, the extent of this
secondary lever 59 is moved forwardly from its
movement being shown in Figure 18. In this
?gure, it will be noted that the main lever 54 ,r. C) starting position, the pawl .94 is pulled out of the
notch 84 and the operator 16 remains stationary.
has moved only for a very small portion of the
When the main lever 54 is subsequently moved
distance ‘from ‘its starting position, whereas the
‘forwardly the pawl or dog 94 will ride over the
secondary lever has moved a considerable dis
tance beyond the position of the main lever 54.
cam face 86 of the head 82 and will drop into the
notch .84 when the operator '16 is moved by means
Additional forward movement of the main lever
54 will provide for equal vmovement of the sec
of the bell crank I02 to its normal position with
‘respect to the secondary lever 59.
ondary lever 66, as shown in Figure 19 in full
Further ‘movement of the main lever 54 will
lines, ‘and further forward movement of the main
‘move the secondary lever 59 therewith through
lever 54 as shown in full lines in Figure 20 will
provide for a decelerated movement for the lever ‘
the normal cycles of movement of the lever 59
‘remaining to the terminal end of the movement
66, the latter lever lagging behind in its move
ment and ?nally terminating its forward move
of ‘the lever 54. It will ~be of course understood
ment at the forward terminal end of the move
‘that the cam tracks I93 and II8 may be varied
in their longitudinal con?guration to provide for
ment of the main lever 54. The secondary lever
60 is adapted to be connected to a pitch chang
the 'desired'cycles of movement of the secondary
ing mechanism, formed as part of a propeller
levers‘ with respect to the main lever.
structure, and the accelerated movement of the
The control herein disclosed has been designed
lever 60 is provided in order to actuate the pitch
particularly for use in airplanes to provide for a
changing mechanism to the desired degree dur
single control to operate the main throttle. the
ing the speeding up of the engine.
60 supercharger and also the pitch changing mecha
In Figure 10 there ‘is disclosed an internal com
nism of the propeller. With this control, the op
bustion engine I56 having a propeller I51 con
erator need ‘only use one hand in effecting com
plete control of ‘the operation of the engine and
nected to the shaft I58 thereof, and a pitch
changing mechanism I59 of conventional con
the other ‘hand may be used for any other de
struction forms part of ‘the propeller I51. A
sired controls.
supercharger shown diagrammatically at ISO is
Referring now to Figures 21 to 23 inclusive, the
connected with the engine I56, and a conventional
numeral I65 ‘designates ‘generally a frame struc
lever I33 is riding over either one of the cam
carburetor I6I is also connected with the en
gine I56.
The secondary lever 59 is connected
by means of a suitable linkage I62 to the super
charger !63 and the main throttle lever 54 is con
nected by a linkage I63 to the main throttle of
the carburetor I6I. A linkage I54 connects the
secondary propeller pitch adjusting lever 65 to
the pitch changing mechanism ‘I59.
ture which includes a rear frame member I66
and a forward frame member I61. The frame
‘members 166 and I61 are of like construction
and each includes a pair of upwardly divergent
arms I68‘ and IE9 which are connected together
‘at their upper divergent ends by means of an
arcuate connecting bar I16. The divergent ends
" of the arms I68 and I69 are formed integral with
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2,406,872
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a circular plate I11; whichis provided with a pair
of ears?'I12 _a‘_nd'll13. The frame members I66
and I 61 are held in spaced‘ apart relation by
lever- I99 is determined by the con?guration of
upper spacing‘ members I14 ‘which are secured to
formed at the left end thereof with an arcuate
3' cam portion 295 which extends upwardly and‘
the divergent‘ends of the ‘armsjI?il and'I69 by
fastening means_I_1-5.,_ The ‘lower portio-nof the
the cam track I98."
- In the‘present‘ instance, the‘ cam track I98 is .
frame I95‘ is'held in spaced relation by means of
then‘merges‘as-at 296 in a reversely curved cam
portion 291.“ This latter reverseiy curved portion
spacer members 616 secured between the ears
281 provides for the decelerated movement of the
I 12 and I13 by fastening members I11.
secondary lever I99 during the latter part of the
A cylindrical hub or pivot member I18 is dis 10 rocking movement of the main lever I83. The
posed between the plates I11 and the opposite ends
upwardly curved cam portion 285 provides for
of the stationary pivot member I18 are provided
the accelerated rocking or movement of the sec
with recesses I19 in which a plate I89 engages.
ondary lever I99 during the initial rocking or
A bolt I8I extends through the center of the end
movement of the main lever I 83.
plates Ill and also through the plates I89 and 15
The operation of the modi?ed form of control
is provided at one end thereof with a nut I82
shown in Figures 21 to 23 inclusive is similar to
so that the plates I89 may be pushed inwardly
that in the preferred form in that the main lever
to apply the desired friction on the respective
I83 at its starting position will be disposed at the
levers which are pivotally mounted on the sta
extreme left of Figure 21. In this position the
tionary cylindrical member I18.
20 secondary lever I99 will have the arm I94 there
A main lever I83 which is provided with a ring
of raised and as the main lever is moved to the
shaped hub I84 is rockably mounted on the cy
right, the cam plate I91 will be rocked downward
lindrical member I19 and is provided at its lower
ly, the con?guration of the cam portion 295 being
end with an extension I85 formed with a plu
such as to provide for rocking of the secondary
rality of openings I86 to which suitable connec 25 lever I99 at a speed slightly greater than the rock
tions may be secured to provide for the desired
ing or swinging of the main lever I83. When
operation of the parts connected with the main
the roller 293 engages in the merging portion 296
lever I83. The lever I93 is disposed in forwardly
between the cam portions 295 and 291, the cam
spaced relation to the rear plate I81 formed by
plate I91 will be substantially motionless but
the rear frame member I69 by means of one or 30 when the roller 293 engages in the reversely
more cylindrical spacer members I88. The spacer
curved cam portion 291, the cam plate I91 will
member or members I89 are mounted on the sta
tionary member I18 and a friction washer I89 is
interposed between the spacer member I88 and
the rear side of the hub I84 of the main lever 35
I83.
eifect movement of the secondary lever I99 at a
speed less than the movement of the main lever
I83.
What I claim is:
l. A control device comprising a main lever, a
A secondary lever generally designated as I99
secondary lever, an operator for said secondary
is rockably mounted on the stationary member
lever, latch means connecting said operator with
I18 forwardly of the main lever I83. The sec
said secondary lever, a bell crank pivotally car
ondary lever I99 as shown in Figure 23 is con
ried by said main lever, means carried by said
structed in the form of a bell crank, being pro
bell crank engageable with said operator for mov
vided with a ring-shaped hub I 9| which rock
ing said operator upon rocking of said bell crank,
ably engages the stationary member I18 and the
and stationary cam means engageable with said
hub 19! has a radially disposed arm I92 provided
bell crank to eifect rocking of the latter upon
with openings I93 for receiving conections to 45 movement of said main lever.
‘
the desired parts operated by the lever I99. The
2. A control device comprising a main lever, a
lever I99 also includes an arm I94 disposed at
secondary lever, an operator for said secondary
right angles to the arm I92 and provided adja
lever, a notched head carried by said operator, 2.
cent the outer end portion thereof with an open
spring-pressed latching dog carried by said sec
ing I95. The secondary lever I99 is adapted to
ondary lever engageable with the notch of said
be rocked with the rocking or swinging movement
head, a bell crank pivotally carried by said main
of the main lever I83 by means of a pivoted cam
lever, means carried by said bell crank engage
element I99. The cam element I96 includes a
able with said operator for moving said operator
cam plate I91 which is formed with a cam track
I198. The cam plate I91 is provided with an elon
gated extension or arm I99 which is pivotally
mounted on one of the securing members or bolts
I15. The cam plate “31 at the opposite end
thereof has pivotally secured thereto as at 299
the upper end of a link 29I. The lower end of
the link 29! is pivotally secured as at 202 to the
arm l94, the pivot member 292 engaging in the
opening I95.
The main lever 883 has mounted on the for
ward side thereof a roller 293 which movably en
gages in the cam track I99. The roller 293 is
mounted on a pivot member 294 which is carried
by the forward side of the main lever I83.
It
will of course be understood that one or more
secondary levers may be mounted on the station
ary pivot member I18, it only‘ being necessary to
duplicate the construction shown in Figure 22 on
the opposite or left side of the main lever I83.
upon rocking of said bell crank, and} stationary
cam means engageable with said bell crank to
effect rocking of the latter upon movement of
said main lever.
3. A control device comprising a pair of sec
ondary levers, a main lever, and means correlated
with said secondary and main levers providing a
differential movement of said secondary levers
relative to said main lever, said means including
means providing differential movement of one
secondary lever relative to the other secondary
lever, said ?rst mentioned means also including
releasable latching means whereby one secondary
lever may be moved independently of the other
secondary lever or the main lever.
4. A control device comp-rising a main rock
lever, a secondary rock lever swingable about the
pivot of said main lever, and means correlated
with both of said levers, providing differential
movement of said secondary lever with respect
to said main lever, said secondary lever moving
The desired rocking movement of the secondary 75 in the same direction as and upon movement of -
2,406,872
11.
said, main lever, said levers being initially posi
tioned in substantially side by side relation, said
means being so constructed and arranged that
said levers will also be positioned in substantially
side. by side relation at they end of their move‘
ment, said means including a stationary cam, a
rock member carried by said main lever, means
12
carried. by said rock member engaging said cam
whereby to rock said rock member upon move-1
ment of said main lever, and a second means car
ried by said rock member operatively connected
; with» said secondary lever whereby rocking of said
rock member will ‘also move said secondary lever.
PHILIP M. WAITE.
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