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Патент USA US2098778

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Nov. 9, 1937.
w. H. FURNESS
2,098,773v
STEERING DEVICE FOR AUTOMOBILES
Filed Aug. 15, 1934
5 Sheets-Sheet 1
O
INVENTOR
BY
Nov. 9, 1937..
w. H. FURNESS
2,093,773
STEERING DEVICE FOR AUTOMOBILES
Filed Aug. 15, 1954
,
5 Sheets-Sheet 2
INVENTOR
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ATTORN EYS
Nov. 9, 1937. _
w ,4, FURNESS
2,098,778
STEERING DEVICE FOR AUTOMOBILES‘
Filed Aug. 15, 1934
5 Sheets-Sheet 3
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INVENTOR
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Nov. 9, 1937.
2,098,778
_w. H. FURNESS
STEERING DEVICE FOR AUTOMOBILES
Filed Aug. 15, 1954
5 Sheets-Sheet 4
INVE NTOR
MM»! W
.
BY
fMLp.
ATTORNEYS
Nov. 9, 1937.
w. H. FURNESS
.
2,098,773
STEERING DEVICE FOR AUTOMOBILES
Filed Aug.‘ 15, 1934
5 Sheets-Sheet 5
INVENTOR.
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BY
‘-
WYMM
ATTORNEY;
Patented Nov. 9, 1937
2,098,778‘
UNITED STATES PATENT ()FFICE
2,098,778
STEERING DEVICE FOR AUTOMOBILES
William H. Furness, Riverton, N. J., assignor to
American Rayon Company, Inc., Riverton,
N. J., a corporation of New Jersey
Application August 15, 1934, Serial No. 739,881
14 Claims. (Cl. 74—500)
This invention relates to steering devices for to its lower ends as by means of a pin 9 so that
automobiles.
the disk rotates with the steering rod. The disk
One of the primary objects of the invention 8 has a plurality of parallel teeth Ill extending
is to provide a quick-acting irreversible steering in a direction across the face thereof. H is a
5 device.
I am aware that it has heretofore been
proposed to provide an irreversible steering gear
in which manipulation of the steering wheel by
the operator produces the desired turning of the
wheels and in which forces applied at the wheels
are not transmitted to the steering wheel. These
however, insofar as I have been aware, have not
been quick-acting.
More specifically it'is an object of the inven
tion, therefore, to provide a simple and effective
15 quick-acting irreversible device.
I have illustrated several embodiments of my
invention in the accompanying drawings,
wherein—
25
the teeth of which are adapted to mesh with v
the teeth ill of the disk 8. The shaft II is off
set with respect to the shaft 1. The shaft l I has
a worm H for engaging the worm segment 18
mounted at one end of the rock shaftv I9.
A
rocker arm 2!) is mounted on the other end of
the rock shaft. The housing I2 has a tubular
extension He by means of which it is secured
is
to one of the side frames 22 of the automobile as
shown in Figure 4. The disk 8 is housed by the
member 23 secured to the casing I2. The usual
Figure l is a diagrammatic side elevation of
an automobile, partly broken out in order to
illustrate one form of my invention;
Figure 2 is an enlarged sectional View illus
link 2! connects the rocker arm to the steering " ‘
20
arm on one of the wheels (not shown).
trating certain details of the arrangement of
is rotated by manipulation of the usual steering
Figure 1.
wheel, the disk 8 is correspondingly rotated, the M
Figure 3 is a section taken on the line 3—3
of Figure 2, and
Figure 4 is a fragmentary view illustrating
how the device of Figure l is mounted.
In this form of my invention rotary movement
30 of the steering rod is transmitted through the
medium of a toothed disk. In the form of Fig
ures 5 to 8 inclusive, rotary movement of the
steering rod is transmitted through the medium
of a slotted cylindrical member. Of these latter
35
shaft mounted in the casing l2 by means of bear—
ings such as the roller bearings 13-44. The
shaft has a yoke l5 at one end thereof in which
is revolubly mounted a toothed wheel or roller it
?gures
Figure 5 is a diagrammatic view illustrating the
principle employed in this form of device;
Figure 6 is a diagrammatic view illustrating one
way in which the proper form of slot may be pro
40 vided for the cylindrical member;
Figure '7 is a sectional view illustrating the
device of this form of my invention, and
Figure 8 is a view showing how the same is
supported in the frame of the vehicle.
45
Figure 9 is a sectional view illustrating a
modi?cation of the device of Figure 7, and
Figures 10 and 11 are sectional views corre
sponding to Figure '7, illustrating still another
.. modi?cation of the form of device therein shown.
50
Referring now to Figures 1 to 4 inclusive, the
reference character A designates the steering
gear as an entirety and the reference character
B the quick-acting irreversible device forming
In this form of my
55 invention the steering rod 1 has a disk 8 secured
.. part of the steering gear.
The operation is as follows: When the rod 1
disk in turn causing the shaft II to correspond
ingly rotate. It will be seen that as the angle of 25
the teeth It] changes with rotation of the disk
8, the angle of the toothed roller I6 is corre
spondingly changed and the shaft II will be
thereby caused to rotate. This is made possible
by virtue of the fact that the roller I6 is free
to rotate on its own axis.
There is thus a one
to-one drive between the steering rod 1 and the
shaft H. If, however, the shaft I l is su?iciently
eccentric with respect to the steering rod 1 the
driving connection is irreversible, that is to say, 35
any turning force applied to the shaft II will
not cause any rotary movement to be imparted
to the disk 8 and, therefore, to the rod 1. Hence
any forces on the front wheels of the automobile
tending to rock the arm 20 are not transmitted to 40
the rod 1 which will remain in any position of
adjustment set by the operator until such time
as the operator manipulates the wheel.
Usually the front wheels are arranged so as
to be swung 60° from extreme turning positions, 45
right and left, and the rocker arm 20 is, there-.
fore, usually swung through a maximum of 60°.
It is also customary to provide a reduction be
tween the steering rod and the rocker arm, say,
for example, three complete turns of the steer 50
ing rod, giving the 60° throw of the rocker arm.
The desired reduction in this form of the inven
tion is provided by the worm l1 and the worm ’ _
segment I8.
55
2
2,098,778
Greater simplicity and compactness is ob
tainedv in the arrangement of Figure 7 wherein
the rocking movement is imparted to the rocker
arm by means of a slotted cylindrical member,
the principle of operation being illustrated in
Figure 5. If we cut out a curved slot 24 in a ?at
plate 25 and
to ?t in said
be moved in
10 numeral 26,
shape the end of the rock shaft l9
slot, it will be seen that if the plate
the arc indicated by the reference
the rocker arm 20 will be rocked
around as indicated.
This gives a short throw
for the cylindrical member 28a to get which, how
ever, the diameter of the member 28a must be
substantially increased over that of the member
28 of Figure 7.. This arrangement also requires
the provision of reduction means if the custom
ary three turns of the steering wheel for swing
ing the rocker arm through its complete arc of,
60° is to be retained. In the particular embodi
ment shown in Figure 9 this is obtained by pro 10
from one extreme position to the opposite ex-_ , viding teeth 32 on the inner wall of the member
treme position. Three positions of the rocker‘
arm are shown in Figure 5, extreme right, ex
15
28a and providing a toothed extension member
treme left, and mid position. To get the same
33 on the steering rod 1. A simple housing 34
is provided and secured to the side frame mem
actionwith a cylindrical member instead of a
ber 22 as before.
plate 25, the curve must be retained in the slot
out in the cylindrical member. A convenient
way forgetting the right shape of slot is to cut
I have illustrated a preferred form of my in
vention in Figures 10 and 11 in which the slot
a templet in the form of a ribbon 21 of the right,
~20 curvature and wrap this around and secure it to
thev cylindrical member 28, as shown in Figure
6. The slot 24a is then milled out in the cylin
dricalimember 28 and the latter is splined in
the'tubular portion 29 constituting the end of
25 or a member secured-to the steering rod. The
cap 30 completes the housing and is secured to
the side frame member 22 by means of the sleeve
3| through which the rock shaft l9 extends with
its inner end shaped as indicated at We to ?t the
'
V
242) in general extends lengthwise of the cylin
drical member 28b, the parts being shown in
mid position in Figure 10 and at one extreme in 20
Figure 11. In vthis form the. steering rod 1 has
a bottom extension member 35 having a square
thread 36. The inside of the member 281) is
similarly threaded. The operation is as follows:
When the steering rod ‘I is rotated the member 25
281) is either raised or lowered from the position
shown in Figure 10 which causes the rock shaft
to rotate; During this operation the‘ member 281). "
itself rotates somewhat as will be readily appar
30 slot.’ In Figure)? the rocker arm 20 is shown
ent from examination of the drawings. ' The
in mid'position. vThe operation is as follows:.
When the steering rod is rotated the member 29
rotates, which, in turn, causes the cylindrical
member 28 to rotate. Since the position of the
35 rocker shaft [9 is ?xed, cylindrical member 28
pitch of the threads is calculated to deliver the
desired reduction. This form like that of Fig
is caused to move up or down, as the case may
be, and as it moves the engagement of the’ end.
I9a of the rock shaft with the side walls of the
Slot, causes the rock shaft to rotate, correspond
40 ingly swinging the arm 20. With' the slot out
, out in this form, 'no additional reduction means
15
ures 7 and 9 is irreversible for the reasons prev
viously pointed out.
It will be'seen that in all forms it is .a change
in angularity of the member associated with the
steering rod which effects rotary movement of.
the rock shaft.v In the form of Figures 1v to .4, V
inclusive there is change of angularity of the
teeth It! as the disk rotateslwhich is translated 40
into rotary movement of shaft! I, and, therefore,
steering'wheel to give'a 60° swing to the rocker
arm. In this arrangement of the slot it'takes
of shaft 19, In the other forms it is change of
angularity of the slot in the cylindrical mem-_
ber associated with the steering rod which ef
fects rotary movement of. the vflatted portion 45.
?tting the slot and therefore of the rock shaft
with which it is preferably integral. It is also
somewhat more movement of the steering wheel
to be understood that the connecting link Zl
to swing the rocker armfrom mid position to
may have the usual yielding means such as
50 one of its extreme positions than from mid
‘ position to its other extreme position.
These are not shown inthe drawings but are
is required as but a turn and a half of the steer
ing wheel will swing the rocker arm from mid
position to either of its extreme positions, mak
45 ing a total of about three revolutions of the
,The arrangement is irreversible, i.' e., forces
transmitted from the wheels of the automobile
to the rocker arm 20 and shaft l9, do not rotate
55 the member 28. Any such force, of course, tends
. to rotate‘ the shaft l9 about its axis and diago
nally opposite corners of the portion IBa press
against opposite walls of the slot, one edge tend
ing to cause the cylindrical member 28 to rotate
in one direction and the other edge tending to
springs at both ends, for cushioning purposes.
ordinarily employed in the standard steering
gear.
'
The advantages of an irreversible steering gear
will be readily understood by those skilled in the
art. It is also to ‘be understood that the inven—
tion is useful for other purposes than for the
steering gear of an automobile and the invention
is not to be understood as being limited to a
steering wheel.
.60
rotate itin the opposite direction. The turning
I claim:_--
effort exerted'by oneedgeris, therefore, neutral- . '
1. In a steering gear for'automobiles, the com
ized by the turninge?ort of the other edge, with
the result that no turning movement is imparted
65 to the cylindricalmember 28 and hence the parts
stay in' the . position set by the operator until
such time as he chooses to manipulate the steer
ing wheel.
' a
The arrangement of Figure 7 requires a long
throw for the cylindrical member 28.. To shorten
.1 the throw 1. have provided the arrangement of
Figure 9 in which the dotted line 21 indicates
the templet for laying out the slot. The tem
plot is applied at its middle portion to the cylin
75 drical member 280, and. the ends. are Wrapped
3
'
,
bination of a steering rod, a rock shaft, and a
quick acting irreversible driving connection there- '
between comprising’ two inter?ttedportions one
of-Which is a cylindrical member having a pe-‘
ripheral curved slot which if developed in a ?at
plane would be an arc of a circle, and the other
of which ?ts the slot and is ?xedly carried b
‘the rock shaft axially thereof.
2. In a steering gear for automobiles, the com
bination of a steering rod, a rock shaft, and a
quick acting irreversible driving connection
therebetween comprising two inter?tted portions
one of which is a cylindrical member having a‘
5.5.
3
2,098,778
peripheral curved slot which if developed in a
?at plane would be an arc of a circle, and the
other of which is a flattened end on the rock
shaft ?tting the slot.
3. In a steering gear for automobiles, the com
bination of a steering rod, a rock shaft, and a
quick acting irreversible driving connection
therebetween comprising two inter?tted portions
thereby and having a curved slot which if de
member movable by the steering rod adapted to
transmit rocking movement to the shoe and rock
shaft, said member having a curved slot receiving 10
said shoe, the curvature of said slot being struck
veloped in a ?at plane would be an arc of a cir
from a center coinciding with the center of curva
one of which is a cylindrical actuating member
10 connected to the steering rod for movement
15
cle, and the other of which ?ts the slot and is
ture of the shoe, and said member being movable
?xedly carried by the rock shaft axially thereof.
to maintain said centers coincident to ensure
4. In a steering gear for automobiles, the com
bination of a steering rod, a rock shaft, and
a quick acting irreversible driving connection
therebetween comprising two inter?tted portions
one of which is a cylindrical member mounted
for rotational and longitudinal movement and
cooperating with the steering rod, said cylindri
cal member having a peripheral curved slot
which if developed in a ?at plane would be an
arc of a circle, and the other of which ?ts the
25 slot and is non-rotatable with the shaft, said
slot being so annularly and longitudinally dis
posed as to give a reduction between steering rod
and rock shaft.
5. In a steerlng gear for automobiles, the com
30 bination of a steering rod, a rock shaft, and
a quick acting irreversible driving connection
10. In a steering gear, the combination of a
steering rod, a rock shaft having an arcuate end
portion central of the axis of rotation of the shaft,
an actuating member having an arcuate slot of 20
the same curvature as said arcuate end portion
and receiving said end portion, and means con
necting said member to the steering rod for move
ment thereby in directions to effect rocking of the
25
rock shaft.
11. In a steering gear, the combination of a
steering rod having a threaded portion, a nut
engaging said threaded portion, an arcuate slot in
a side face of said nut, a rock shaft having an
arcuate shoe-like end portion positioned axially
thereof, said arcuate shoe-like portion ?tting the
arcuate slot in said nut whereby movement of the
nut by the steering rod effects rocking movement
for rotational and longitudinal movement and
of the rock shaft.
cooperating with the steering rod, said cylindri
cal member having a peripheral curved slot which
if developed in a ?at plane would be an arc of
a circle, and the other of which ?ts the slot and
is non-rotatable with the shaft, and means pro
viding a reduction as between steering rod and
rock shaft.
6. In a steering gear, the combination of a
steering rod, a rock shaft, a shoe ?xedly carried
by the rock shaft with its axis aligned with the
45 axis of the rock shaft, an actuating member
having a curved slot receiving the shoe, and
means connecting said member to the steering
rod for movement by the steering rod effecting
rotation of the shoe and rock shaft.
50
rocking movement of the shoe and rock shaft 15
without binding of the shoe in the slot.
one of which is a cylindrical member mounted
therebetween comprising two inter?tted portions
35
for movement in a direction to compensate for
the curvature in the slot which would otherwise
result in a locking action.
9. In a steering gear, the combination of a
steering rod, a rock shaft, a curved shoe ?xedly
carried by the rock shaft on an axis coinciding
with the axis of the rock shaft, an actuating
‘
7. In a steering gear, the combination of a
steering rod, a rock shaft mounted for rotation
on an axis at right angles to the axis of the
steering rod, a shoe ?xedly carried by the rock
shaft in axial alignment therewith, an actuating
member having a curved slot receiving said shoe,
and means connecting said member to the steer
ing rod for movement by the steering rod effect
ing rotation of the shoe and rock shaft.
8. In a steering gear, the combination of a
60 steering rod, a rock shaft mounted for rotation
on an axis at right angles to the axis of the
steering rod, a shoe ?xedly carried by the rock
shaft in axial alignment therewith, an actuat
ing member having a curved slot receiving said
65 shoe, and means connecting said member to the
steering rod for movement in a direction longi
tudinally of the steering rod but with freedom
‘
12. In a steering gear, the combination of a 35
steering rod, a rock shaft rotatable on an axis at
right angles to the axis of the steering rod, an
actuating member having a curved slot in a face
thereof, means connecting said member to the
steering rod for movement thereby, and a shoe
?xedly carried by the rock shaft axially thereof
and ?tting said slot whereby movement of the
slotted member by the steering rod effects rocking
movement of the rock shaft.
13. A steering gear comprising a steering rod, a 45
rock shaft, an actuating member for imparting
rocking motion to the rock shaft, and means con
necting the actuating member to the steering rod
for movement thereby, said actuating member
having an arcuate slot and said rock shaft having 50
an arcuate shoe ?xed thereon axially thereof and
?tting the slot.
'
14. In a steering gear for automobiles, the com
bination of a steering rod, a rock shaft, and a
quick acting irreversible driving connection there: 55
between comprising two inter?tted portions one
of which is a cylindrical member cooperating with
the steering rod and having a peripheral curved
slot which if developed in a ?at plane would be an
arc of a circle, the other of which ?ts the slot and 60
is non-rotatable with the shaft, the said other
member further having its side faces curved sub
stantially on the same radii as was the side faces
of the curved slot, said slot being so annularly and
longitudinally disposed as to give a reduction be
tween steering rod and rock shaft.
WILLIAM H. FURNESS.
65
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