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Патент USA US2127744

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‘Aug. 23, 1938.
0. C. LINTHWAITE
OUTBOARD MOTOR
Filed May 22, 1955
I'l[1‘
I 2,127,744
.
s Sheets-‘Sheet 1
/
INVENTOR.
v
OWEN Q._I~IHTHWAITK"
fga/Mm/ .
ATTORNEY
Aug. 23, 1933.
0. c. LINTHWAITE
v 2,127,744
OUTBOARD MOTIOR
Filed May 22, 1935
3 Sheets-Sheet 2
a
1
_ _
Z3.
Aug. 23, 1938._ I
o. c. LIINTHWAITAE
I
2,127,744
OUTBOARD MOTOR
Filed May 22. 1955 ‘
3 Sheets-Sheet 3_
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OWEN 'C. LmTHwmTK“ ‘
A TTORNEY.
Patented ‘Aug. 23, 1938
2,127,744
PAATENT' OFFICE
' UNITED STATES
2,127,744
OUTBOARD MOTOR
Owen C. Jtinthwaite, South Bend, Ind., assignor
to Bendix Products Corporation, South Bend,
Did, a corporation of Indiana
‘Application May 22, 1935, Serial No. 22,709
9 Claims; (01. 115-18)
securely clamped to the transom of the boat
This invention relates to outboard motors, and
In the operation of motors of this type it is
desirable that convenient adjustable ‘means be
even though the transom may be slightly out of
line or warped.
Further objects and advantages of this in
vention will be apparent from the following de
tailed description, taken in connection with the
provided whereby the motor may be attached
accompanying drawings, submitted for purposes
is more particularly directed to means for ?x
=_ing an outboard motor to a boat, and novel
means for steering the boat. *
a
.
to various types of boats having supporting tran- , of illustration only, and not intended to de?ne
the scope of the invention, reference being had
' soms set at different angles. It is therefore de
10 sirable to provide means whereby the angle be
for that purpose to the subjoined claims. _
In the drawings, wherein similar reference
characters refer to similar parts! throughout the
tween the engine drive shait and the transom
of ‘the boat can be varied with the greatest ease.
It has been found that considerable torque
vibration, inherent in-the motor, is transmitted
15 . to the steering mechanismlwhere the axis about
which the motor is turned for steering is coin
several views:
board motor incorporating the present invention;
- Figure 2 is an enlarged sectional view of a por
cident with the engine drive shaft. This vibra
tion of Figure 1;
,
5, showing a modi?ed form of the invention;
Figure 7 is a detail view showing a modified 25
form of the bracket adjusting means;
Figure 8 is a view similar to Figure 2 showing
a still further modified form of the invention;
'
and
'
\
by the reference numeral l0, ?xed to the tran
som l2 of a boat. The outboard motor Ill in
cludes a hooded internal combustion engine l4
provided with a fuel tank It, and adapted to
drive a propeller IB by means of an engine drive
shaft 20 extending through an upper housing
_
section 22 and a lower housing section 24. The‘
propeller is protected from injury, due to strik- ,
ing against an object, by a protecting ?n 26.
The lower housing section 24 carries an anti
cavitation plate 28, adapted to overlie the pro- _
peller l8 to prevent cavitation of the propeller.
A stream-lined ?n 30, carried by the housing 45
24, and overlying the anti-cavitation plate 28, is
adapted to facilitate steering operations‘of the
4
Another object of the invention is to provide
a strong, but extremely simple and light, bracket
50 of the class hereinafter described.
~
Referring more particularly to Figure 1, there
Another object of the invention is to provide
40 an adjustable co-pilot mechanism whereby any
predetermined course may be steered without the
attention of the operator.
A still further object vof the invention is to
provide a bracket of simple design and con
45 struction whereby all of the pieces may be formed
by die-casting, for ?xing an outboard motor to >
a boat.
'
is shown an outboard motor indicated as a whole
.
Another object of the invention is to provide
a steering mechanism wherein, the axis of rota
35 tion'of the motor is non-concentric with the axis
of the engine drive shaft, to decrease the effect
of normal engine vibration upon the steering
mec_hanism.
-
I Figure 9 is a top plan view of Figure 8.
angle between the engine drive shaft and the
transom of the boat can be quickly and easily
made.
'
Figure 5 is a top plan view of Figure 4;
,V
Figure 6 is a detail view of a‘ portion of Figure;
-It is therefore an object of this invention to
provide means for ?xing an outboard motor to a
boat in such a manner that variations in the
3
'
'a modi?ed form of the invention;
constantly manipulating the steering mech
anism.
-
Figure 3 is a top plan view of Figure 2 taken
on the line 3-3 of Figure};
Figure 4 is a view similar to Figure 2, showin
tion r'endersit difficult to steer any desired
course, andrenders it practically impossible to
V ‘20 ‘adjust the steering mechanism whereby mini
mum force will be required for normal steering
operations of the boat, without having the ad
justment so loose that it is impossible to steer
a predetermined course without .the operator
2
.
Figure l is a view in'side elevation of an out
-
,
A furtherv object ‘of the invention is to pro
vide means for preventing the vibrations of the
engine fromlbeing transmitted to the boat.
A still further object of the invention is to
55 provide a bracket wherein the motor may be
boat.
a
,
_
'
Steering operations of the boat are e?ected by
' turning the outboard motor In about an axis de
50
?ned by a pressure plate 32 iournalled in the
upper housing section 22, and separated there
from by resilient washers 34 interposed between
the motor ill and the‘pressure plate 32, to dampen
vibration of the engine It. The pressure plate 55
2
2,127,744
32 is provided with a pressure arm 34 formed in
tegral therewith.
As indicated above, the motor III is ?xed to the
pressure plate 32 and is rotatable about the longi
tudinal axis of this plate.
The pressure arm
34 is rotatably mounted upon a stud 36 project
ing therethrough, so that as the pressure arm
34 is moved in a vertical plane the angle be
tween the drive shaft 20 of the motor, and the
transom I2 of the boat is varied.
The stud 36
passes through a pair of brackets 38 having
transom-engaging projections 40, and provided
with arms 42 adapted to receive manually oper
able adjusting screws 44 to securely clamp the
brackets 38 to the transom I2 of the boat. The
arms 42 are provided with web sections 45 pro
vided with a plurality of apertures 46 designed to
receive a bolt 48, which in turn is engaged by a
hook 50 carried by the pressure arm 34. To vary
the angle at which the motor I0 operates, it is
only necessary to move the bolt 48 to a different
aperture 46.
If the propeller protecting ?n 26 should strike
an object, the motor I0 will be rotated about the
25 axis of the stud 36 to move the propeller IEI
to such a position that damage thereto will be
avoided. This is possible in view of the fact that
the book 50 carried by the pressure arm 34
merely disengages the bolt 48 and rotates in a
30 clockwise direction about the stud 36 until its
movement is restricted by contact with the tran
sofn I2 of the boat.
In the embodiment shown in Figure 4 the bolt
48 ‘and hook 50 of Figure 2 have been replaced
r by a snap joint, wherein the pressure arm I34 is
provided with a cross member I35 having pins
I31 adapted to fit into the apertures I46 to de
termine the position of the pressure arm I34 with
reference to the webs I45 carried by the arms
I42. The cross member I35 is hollow and is
provided with slots I31 to receive levers I39
pivoted to the pressure arm I34 by pins IN.
The levers I33 operate the pins I3? ‘and are
yieldingly urged in a direction to hold the pins
I31 into the apertures M6" by means of springs
I43 interposed between the pressure arm I312 and
the levers‘ I39. In this embodiment, it is neces
sary only to compress the levers I 39 and move the
pins I31 to a different aperture I46 to vary the
angle between the drive shaft 23 of the motor
It, and the transom I2 of the boat.
In the embodiment shown in Figure 6, the pins
I31 are actuated by means of a single coiled
spring I43 ?xed to the pressure arm I34 by
in the same manner as the pressure plate 32
of the other embodiments. A pressure arm 251
is pivotally mounted on a stud 259 passing
through the pressure plate 255. The pressure
arm 251 is provided with a foot 26I designed to
engage a pad 263 of the pressure plate 255.
A pair of clamping brackets 265, carried by the
stud_259, are provided with boat-engaging projec
tions 261 adapted to cooperate with manually ad
J'ustable studs 269 carried in arms 21I of the 10
bracket 265 to securely fix the bracket to the
transom 2I2 of the boat. A pressure bar 213
extends between the arms 21I of the bracket 265
to securely tie the bracket members together. An
adjustable stud 215 projects through the pressure 15
bar 213 and is screwed into the pressure arm
251 as clearly shown in Figure 8.
In this embodiment the thrust of the motor is
transmitted through the pad 263 to the foot 26I
of the pressure arm 251-.
The thrust is then 20
transmitted through the adjustable stud 215 to
the pressure plate 213, and from the pressure
plate 213 to the arms 21I of the brackets 265
?xed to the transom 2 I2 of the boat. The motor
is rotatable about the stud 259, and the angle
between the engine drive shaft and the transom
2I2 of the boat may be adjusted by manipulat
ing the adjustable stud 215, so that the motor
may be set atany desired angle with respect to
the transom of the boat.
30
It has been found that when the motor is
turned about the 'axis of the engine drive ‘shaft
to effect the steering of the boat, that consider
able vibration and torque interference is trans
mitted through the steering mechanism.
The
motor will therefore exert a turning moment
which must be constantly resisted by the operator,
in order to follow any predetermined course.
This turning moment varies between rather wide
limits and is dependent in part upon the speed 40
of the engine.
It has been found that torque interference of
the motor with the steering mechanism is com
pletely eliminated when the steering axis is non
concentric with the axis of the engine drive shaft.
In the present invention, the steering of the
boat is effected by rotating the motor I6 about
the longitudinal axis of the pressure plate 32,
which of course is non-concentric with the axis
of the engine drive shaft 28.
_
The pressure plate 32 is rotatably mounted in
the upper housing section 22, and is insulated
therefrom, at the lower end, by the resilient
washers 34 to prevent vibration of the motor II]
from being transmitted to the boat. The upper
end of the plate 32 is journalled in a clamping
bracket SI resiliently connected to the upper
housing section 22 by any suitable means, such
as the bolts 93 passing through the resilient
stuck, or for any other reason fail to slide out washers 95. A manually operable tiller 60, ?xed 60
of the aperture I46.
to the bracket SI, operates to rotate the motor
In the embodiment shown in Figure 7, the pins
In about the axis of the pressure plate 32.
I31 are yieldingly urged to the extreme posi- '
The bracket 9| ‘is provided with a so-called
tion by means of a spring I5I. The pins I31 are co-pilot or manually operable adjusting screw 91
actuated by means of knobs I53 ?xed in the body to vary the amount of force required to be ex
of the pins, and slldable in the slots I31 to actu— erted on the tiller 60 to rotate the motor I0
ate the pins.
about the axis of the pressure plate‘ 32.
In the embodiments shown herein, the angle
It is thus possible to follow any desired pre
between the motor and the boat can be ad
determined course, or to vary the force required
to be exerted upon the tiller 60 to effect steering
70 justed with the greatest of ease, and it is there
fore believed that more e?icient operation of the operations of the boat by merely manipulat
motor will result because of the accessibility and ing the co-pilot to interpose any desired amount
the ease with which this adjustment can be made. ' of friction between the housing 22 and the plate
In the embodiment shown in Figure 8, the 32.
pressure plate 255 is secured to the motor I0
vThis application is a continuation-in-part of 75
means of a‘pin I41.
In this embodiment a stop
ring I49 is provided intermediate the pins I31
to prevent the force exerted upon the spring I43
from being applied to remove only one pin, in
the event that the other pin should become
3.
.
‘
2,127,744
my co-pending application Serial No. 2,085,, filed
.
pin is moved to diiferent of the‘spaced apertures.
6. In an outboard motor assembly for a boat
While the invention has‘ been described with ' having a. transom, an internal combustion en
gine, a propeller, a housing extending between
particular reference to certain preferred em
bodiments, it is not intended to limit the scope the engine and the propeller, va drive shaft posi
of- the invention to the embodiments described, tioned in the housi , a pressure plate rotatably
nor otherwise than by the terms of the follow- - mounted on the housing eccentrically with refer
ence to the drive shaft, a bracket having spaced
' ing claims.
arms adapted to engage the transom, a web hav
.I claim:
.
v
.
10' 1. In an outboard motor for a boat, a drive ing a plurality of spaced apertures carried by said 10
shaft, means including a bracket for turning the arms,‘ a pin extending through the apertures, a
‘motor about an axis for steering, a resiliently‘ pressure arm carried by the- pressure plate,
mounted tiller forturning the motor about said means to rotatably mount the pressure arm with
. axis for steering, and manually operable clamp
respect to the bracket,‘one end of said arm being
January 16, 1935.
ing means including spaced oppositely disposed
conica1\ resilient means interposed‘ between the
bracket and the motor for varying the-resistance
to steering movements.
_
a
2. An‘ outboard motor having a drive shait,
a housing surrounding the drive shaft, a pres
' sure plate including a bracket pivotally mounted
with respect to the housing, a pressure’ arm
designed toengage the pressure plate and the 15
other end being designed to engage the pin to
vary the angle between the housing and the
transom in one direction as the pin is moved to
different of the spaced apertures, and means in
cluding a manually operable tiller to rotate the 20
mlggr assembly about the axis of the pressure
P
-
“'
mounted on the bracket and engaging the pres
7. A bracket having a pair of spaced boat
sure plate, clamping means ‘pivotally mounted
engaging members, ‘webs having a plurality of
spaced apertures ‘carried ' by said members, a
adjustable means between the pressure arm and pressure plate adapted to be pivotally and re
the clamping means to limit the angle between siliently mounted to an outboard'motor eccen
the drive shaft and the boat in one direction trlcally with reference to the drive shaft, a pra
sure arm carried by the pressure plate, means to
only.
,
‘
3. In an outboard motor for a boat, a drive pivotally mount the pressure arm between said 30
shaft, a housing surrounding the drive shaft, a members, one endof said arm being adapted to,
- on said bracket to ?x the motor to a boat, and
pressure plate including a bracket pivotally
mounted with‘ respect to the housing, a pressure
engage the pressure plate, and‘mearis including ‘
a pin extending through the spaced apertures
and adapted to be engaged by one end ‘01’ the
arm'mounted on the bracket and normally en
~ gaging the pressure plate at one end, clamping arm to vary the angle. between the pressure plate 35
means carried by said bracket to fix the motor . and said members in one direction.
8. In an outboard motor for a boat'having a.
‘to a boat, and adjustable means associated with I
transom, an internal combustion engine, a pro
the clamping means and adapted to be en
gaged vby one end of the pressure arm to vary the peller, a housing extending between the engine
angle between the drive shaft and the boat in
one direction only and to permit pivotal. move
ment aboutsaid bracket.
. 4. In an outboard motor assembly for a boat
having atransom, an internal combustion en
, ' gine, a propeller, a housing extending between
the engine and the, propeller, a‘ pressure plate
pivotally mounted non-concentrically with re-.
'spect to the‘ housing, a bracket adapted to en
gage the transom, a web having a plurality of
spaced apertures carried by the bracket, a pin
extending through the apertures, and a pressure
arm carried by the pressure plate, a portion of
‘l the arm‘ beingshaped in the form of a hook to
engage said pin to limit the angle between the
housing and the transom in one direction.
5. In an outboard motor assembly for a boat
having a transom, an internalmombustion en
and the propellena drive shaft in the housing, 40
and means to attachv the outboard motor to the
transdm of the boat, said means including a pair
of spaced boat‘ engaging members, webs having a
plurality of spaced apertures carried by said
members’, a member pivotally and resiliently 45.
mounted,to the housing eccentrically with re
spect to the drive shaft, a projection on said plate
rotatably mounted between said members, and
means carried by said projection and cooperat
ing with said apertures to limit the angle be 50
tween the drive shaft and the transom in one
direction only.
'
_
,
9. In an outboard motor for a boat having a
transom, an internal combustion engine, a pro
peller, a housing extending between the engine 55
and the propeller, a drive shaft in'th'e housing, .
and means to ?x the outboard motor to the
gine, a propeller, a housing extending between‘ transom o! the boat, said means including a
the engine and the propeller, a pressure plate ,pair of spaced boat-engaging members, webs hav
so pivotally and eccentrically mounted'with respect ing a plurality of spaced apertures carried by said 60
,members, a plate rotatably mounted with re
' , to the housing, a bracket having spaced
adapted to engage the transom, a‘web having, a spect'to the housing, a projection on said plate
plurality of spaced apertures carried by said
arms,-a pin extending through the apertures, and
rotatably mounted between said members, and
means including a bolt extending between the
webs to restrict the movement of the projection 65
portion of the arm being designed to engage the' in one direction only to determine the angle be-v
pressure plate at a point remote irom'the pivotal tween the drive shaft and the transom oi ‘the
a pressure arm carried by the pressure plate, a
mounting and another portion being designed to
engage the pin to vary the anglev between the
70 housing and the transom in one direction asthe
boat.
‘
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owns 0.
.
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