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Патент USA US2134500

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Oct. 25, 1938.
c. c. BENNETT
2,1,34,500
WHEEL BALANCER—DYNAMI C - TYPE
Filed Jan. 14, 1955
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C/aude C Bennett
3% 6M 17
Patented Oct. 25, 1938
2,134,500
UNITED STATES PATENT OFFICE
2.114.500
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wnaar. asmncaa-omsmc-ms
Claude 0. Bennett, South Bend, Ind... allgnor to
A. E. Feragen, Inc., Seattle, WIIIL, a corpora
tion of Washington
Application January 14, 1885, Serial No. 1,887
liiOiaims. (GL ‘II-51)
My invention relates to wheel balancing de
vices, particularly to such devices which will
indicate the presence or absence of unbalance in
a wheel which is rotating rapidly. It is some
times the case that a wheel may be found prop
erly balanced statically and yet will not be bal
anced dynamically, when rotating, so that such
a wheel, on an automobile, will cause difficulties
in steering and alignment while the automobile
It is a
primary object of my invention to provide a de
vice whereby the presence of such dynamic un
1 O is traveling at any appreciable speed.
balance in a wheel may be discovered.
My device may also serve to balance such a
15 wheel statically, and will serve to indicate the
point where the maximum or minimum weight
causing the unbalance is located.
It is a further object to provide such a balanc
ing device in which a wheel support may be
20 rotatably driven at an appreciable speed by power
means, and which incorporates suitable indicat
ing means to determine unbalance.
It is a further object to provide in such a
wheel balancing device, means for accurately
25 locating parts and a simple and easily adjustable
indicating device.
Further objects, and particularly such as relate
to the more purely structural details, will be
ascertained as this speci?cation progresses.
30
My invention comprises the novel parts, and
the novel combination and arrangement thereof,
as shown in the accompanying drawing, de
scribed in this speci?cation, and as will be more
particularly pointed out by the claims which
35 terminate the same.
In the accompanying drawing I have shown my
invention embodied in a form which at present is
preferred by me, it being understood that various
changes may be made in the form and the ar
40 rangement of the parts without departing from
"
the scope of my invention, which will be ascer
tained in the claims.
Figure 1 is an axial sectional view through the
device, showing parts in position for operation.
45
Figure 2 is a plan view oi’ the indicator portion
or my device, and Figure 3 is a transverse sec
tion through the same.
The structure of the stand, generally desig
nated by, the numeral i, is of little importance
50 insofar as the principle of my invention is con
cerned. I have shown an upright pedestal i0
supporting a U-irame II, the upright Iii carry
ing at its upper and any suitable hearing such as
a cupped member I! in which is seated a fulcrum
65 ball i8.
Generally supported on this bearing ball
i3 is a wheel support 2 consisting of a platform
20 wbereon a wheel W may rest, an upright post
II which is axially disposed and the lower end of
which rests upon the ball II, and means such as
the cone 2! and nut 23 threaded upon the post to 5
center the wheel W upon the platform Ill.
The upper end of the post 2| may tilt on the
ball it, unless restrained. It should be nor
mally perfectly vertical, so that with a properly
balanced wheel on the platform, and the plat
form and wheel rotating, the post will have no
tendency to tilt. However, to dispose the wheel
precisely upright, and to prevent its tilting when
the wheel support is not rotating, suitable means
may be provided engaging the upper end of the 1
post. To this end I provide a frame 30 surround
ing the upper end of the post and supported
from the U-frame ii, and in the four sides of
this frame I mount the bolts 3| and 12. There
are three of the bolts ll, spaced by 90° around 20
the post, and they would normally be adjusted
relative to the frame it so that they hold the
post precisely vertical except as it may move to
wards the bolt 31. If the bolt 32 is brought into
contact with the post, then the post will be held
against any tilting movement, but it the bolt 32
is withdrawn somewhat the post may tilt in thi:
one direction.
This tilting will be the result 0
support
unbalance
2 and
in aeither
wheelrotating
mountedatupon
somethe
speed,
whet0.
caused to tilt towards this bolt 32 when the heavy
portion of the wheel rests generally beneath this
bolt.
.
Accordingly this tendency to tilt the post may
be taken advantage of to operate an indicator 35
of any suitable type, so that as the post tilts, the
indicator shows that the post has been displaced
from its true vertical position in its normal axis
of rotation. While any suitable device, mov
able by tllting of the post, may be employed, I 40
prefer that this indicator take the form of a plate
ll supported'in the frame II by pivots ll be
tween its upper and lower edges, engaging the
post, and provided with means to indicate when
it tilts. An arm 4, extending transversely from 45
one side of the plate “I, carries a weight 43 which
causes the edge of the plate at the opposite side
of the pivot from the arm (in this instance the
lower edge of the plate) to bear against the post
2i. Since it is not desirable that any appre- 50
ciable pressure be employed, as otherwise slight
tilting of the post will not be noticeable, it will
usually be found desirable to provide a. second
arm 4| extending from the opposite side of the
plate Ill and carrying an adjustable weight l5, l6
2
2,184,500
so-that the weights l8 and II may be nearly bal
and restraining tilting movement of said post
anced one against the other, yet an arm l or M
except in one direction, a contact member en
of considerable length is provided. the oscillation
of which as the plate “I oscillates will serve to
indicate any tilting of the post, and consequently
serves as an indicator of unbalance in the wheel
as it rotates. The plate II is notched, as indi
cated at It, for passage of the tip of the screw II.
Rotation of the wheel support 2 may be ac
10 complished in any suitable or convenient man
ner. 'm that end, and by way of example, I have
shown a clutch element II formed as a part of
the wheel support, and a complemental clutch
element I is mounted upon the member I! at the
15 upper end of the upright II. this member I car
rying a pulley II driven by a belt II, carried over
suitable guide pulleys II, from a motor I0 mount
ed upon the base of the stand. Engagement of
the clutch elements I and 2! is 'suitably con
20 trolled, as for example by an arm I4 pivoted at
II and engageable beneath the clutch element I,
this arm being movable upwardly and downward
ly by a link II connected to the treadle I‘l. When
the clutch is engaged, a su?lciently large bearing
25 surface is alluded to prevent appreciable tilt
ing-on the bearing II, but when the rotation of
the wheel has been brought up to the desired
speed the clutch elements may be disengaged,
leaving the post 2| free to tilt on the bearing II
30 as the wheel continues to rotate.
The device thus will serve as a dynamic bal
ancing device, but as I have indicated, it may
post to dispose the latter precisely vertically and
restraining tilting movement except in one di
rection, a plate pivotally mounted on an axis ex
tending transverseiyof the direction of tilting 15
disposed between its upper and lower edges adja
cent the tiltable end of the post, a weight acting
upon said plate to cause a lower edge to bear
lightly against the post, and means to indicate
oscillation of said plate under the in?uence of 20
tilting of the post, as the wheel support rotates.
5. A wheel balancing device comprising a stand.
a wheel support including a vertically disposed
post centrally rotatably mounted on said stand
to tilt relative to its normal axis of rotation, 25
means engageable with the tiltable end of the
post to dispose the latter precisely vertically and
restraining tilting movement except in one direc
tion, a plate pivotally mounted on a transverse
axis between its upper and lower edges adjacent 30
the tiltable end of the post, a weight acting upon
said plate to cause a lower edge to bear lightly
contact ?nger adjustably supported by any suit
able arrangement, indicated at W, to contact with
against the post, means to indicate oscillation of
said plate under the in?uence of tilting of the
post as the wheel support rotates, and power 35
means to rotate said wheel support.
6. A wheel balancing device comprising a stand,
a wheel support including a vertically disposed
post centrally mounted on said stand to tilt rel
the wheel or the tire thereon, and as the wheel
ative to its normal axis of rotation. means en
is moved past the contact iinger the latter will
indicate the presence of wobble in the wheel. To
this end the post must be held upright by the
screws II and 32, or the clutch element I may
be raised into a position where it will support the
gageable with the tiltable end of the post to dis
pose the latter precisely vertically and restrain
ing tilting movement except in one direction, a
plate pivotally mounted on a transverse axis be
tween lts upper and lower edges adjacent the tilt 45
able end of the post, two arms extending laterally
from said plate and from respectively opposite
sides. weights adjustable along said arms to cause
an edge of the plate to bear lightly against the
post, said arms serving to indicate oscillation of 50
the plate under the in?uence of tilting of the post,
as the wheel support and post rotates.
'I. A wheel balancing device comprising a
stand, a wheel support including an upright ax
also serve as a static balancing device, since even
with slow rotation of the wheel support and wheel
the post II will tilt if there is unbalance, and
the indicator arm I or 44 will still indicate this
unbalance. The device is also provided with a
post substantially upright.
What I claim as my invention is:
1. A wheel balancing device comprising a stand.
a wheel support, including a vertically disposed
post centrally rotatably mounted on said stand
to tilt realtive to its axis of rotation, means re
straining tilting movement of said post except
in one direction, a contact member engageable
with the post to be moved when the post tilts
due to unbalance in a wheel carried by the sup
port, and indicator means operable by such move
ment of said contact member.
2. A wheel balancing device comprising a stand,
a wheel support, including a verticallyv disposed
post centrally rotatably mounted on said stand
to tilt relative to its axis of rotation, means re
straining tilting movement of said post except in
one direction, a contact member pivoted on an
axis transverse with respect to the post and en
gageable with the post, and a weighted arm press
ing said contact member lightly against the post,
and serving as an indicator movable when the
post tilts due to unbalance in a wheel carried by
the support.
10
gageable with the post to be moved when the
post tilts due to unbalance in a wheel carried by
the support, and indicator means operable by
such movement of said contact member.
4. A wheel balancing device comprising a stand,
a wheel support including a vertically disposed
post centrally rotatably mounted on said stand
to tilt relative to its normal axis of rotation, 10
means engageable with the tiltable end of the
3. A wheel balancing device comprising a stand.
a wheel support including a vertically disposed
post centrally rotatably mounted on said stand
to tilt relative to its axis of rotation, means en
gageable with the upper end of the post and ad
lustable to dispose the latter precisely vertically
40
ially disposed post centrally rotatably mounted 55
on said stand to tilt relative to its normal axis
of rotation, a frame open at one side and sur
rounding the upper end of said post, a bar re
movably positioned across the open side of said
frame to permit swinging of the post from the
frame, contact means supported in said frame
and bar to dispose the post precisely vertically
and to permit it to tilt in one direction only, and
a plate supported in said frame to oscillate about
an axis transverse to and at the side towards
such direction of tilting and directly engageable
with the post whereby its oscillation indicates
tilting of the post and thereby unbalance oi the
wheel as they rotate.
8. A wheel balancing device comprising a 70
stand, an upright shaft rotatably supported
thereon, a wheel support carried by said shaft,
means engageable with the upper end of said
shaft to control tilting movement thereof eifected
by rotation on said wheel support of an unbal 75
3
aisasoo
anced wheel, a plate mounted in said means to
pivot about an axis transverse to said shaft and
disposed to engage said shaft with an edge there
of, means urging said engaging plate edge to bear
lightly against said shaft, and means to indicate
oscillation of said plate, said means being e?eot
ed by the varying pressure thereagainst of said
tilting shaft.
9. A wheel balancing device comprising a
10 stand, an upright shaft rotatably supported
thereon, a wheel support carried by said shaft,
rigid members fixed in positions spaced about
the upper end of said shaft and engageable there
by to prevent tilting movement of the shaft in
all but a single direction eiiected by rotation on
said wheel support of an unbalanced wheel, and
means disposed at the upper end of said shaft to
indicate tilting thereof.
10. A wheel balancing device comprising a
stand, an upright shaft rotatably supported
thereon, a wheel support carried by said shaft, a
fixed member encircling the upper end of said
shaft and spaced therefrom, rigid means carried
by said member and engageable by the shaft to
limit tilting movement thereof effected by rota~
tion on said wheel support of an unbalanced
wheel, a plate journaled in said ?xed member to
swing about an axis transverse to said shaft, and
disposed to engage said shaft with an edge there
01’, means urging said engaging plate edge to bear
lightly against said shaft, and means to indicate
oscillation of said plate eifected by the varying
pressure thereagainst of said tilting shaft.
CLAUDE C. BENNE'I'I‘.
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