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Патент USA US2403813

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July 9, 1946»
J. `I.jvlArum-:RsczHEnD
Filed July 24, 1944
Í _2,403,813
Patented July 9, 1946
A 2,403,813
` James J. Manderscheid, Chicago, Ill.
application July 24, 1944, serial No. 546.425A
.s claims. (C1. 51-168)
», The present invention relates to polishing
other v,composition suitable for the purpose and
wheels and especially toa novel light weight
having the desired rigidity and inherent. strength.
bushing that may be readily inserted and per- f
'.The present inventiony further comprehends a
novel manner 'of anchoring the bushing onto `the
polishing wheel-to thereby prevent'it from com
manently anchored in the opening in such pol
ishing wheels.
Polishing wheels now on the, market are each
ingout or turning in the wheel.
provided with a centrally disposed opening ap
Y Further objects are to provide a construction
. pr'oXimately" 1A; inch less in diameter than the
of maximum' simplicity, efficiency, economy and
lathe spindle upon which itis to be mounted.
ease of assembly and operation, and such fur
The polishing wheel is then forced overV the 10 ther objects, advantages and capabilities vas will
threads of the lathe spindle while the spindle is
later more fully appear and areinherently pos
rotating. This procedure not only causes wear
sessed thereby.
on the spindle but also endangers the operator
The invention further resides in the construc
as he must release the polishing Wheel an in
tion, combination and arrangement of parts illus
stant before the Wheel hugs the inside flange on
trated in the accompanying drawing, and while
the spindle or a dangerous hand burn results.
there is shown therein a preferred embodiment,
Furthermore, this results in the opening being
it is to be understood that the same is susceptible
distorted out of round.
of modification and change, and comprehends
Among the objects of the present invention is y other details, arrangements of parts, features and
to provide a novel construction Aof bushing for a 20 constructions without departing from the spirit
polishing WheelV that may be safely, kreadily and
easily mounted in a polishing wheel whetherl
old or new.
of the invention.
Inthe drawing:
It adds Very little to the cost of ~
Figure` 1- is a- view in perspective of thenovel
the polishing WheelY and when inserted,v is auto- ,
t matically and rigidly connected thereto in op 25
erative relation. A polishing wheel equipped with
the novel bushing is concentric throughout its
entire circumference, is accurately balanced and
Figure 2 is an enlarged view in vertical cross
section through the bushing.
Figure 3 is an enlargedview in side elevation
of the polishing >lathe spindle and showing-the
thereby completely eliminates all chatter or un
The Work being polished 30
even wearing surfaces.
with a wheel provided with the present bushing,
will touch the face Vof the wheel along the entire
circumference and thereby causing'theemery or
manner yin which a pair ‘of bushings Vmayfbe
mounted in a polishing Wheel4 byusing theA pol
ishing lathe spindle as ascrewpress.
‘ v
Figure 4 is a fragmentary ‘View similar to Fig
ure‘ Sbut showing the bushings vassembled and
forced intooperative position in thel polishing
. abrasive to wear uniformly and avoid all waste.
In the assembly of a. polishing Wheel equipped 35
with the present novel bushing, it may be slipped
over the polishing lathe spindle »while the latter
is stationary, so that neither the Wheel nor the
machine is turning when the former is placed on
the spindle. Furthermore, the wheel is not 40
Figurev 5 is a View in side elevation showing
a-single bushingl mounted in position and the
polishingv wheel so equipped assembled on the '
Referring moreA particularly to the disclosure in
forced over the threads either in putting it ‘on -
the drawing, the novel embodiment selected to
or taking it off and thus no wear or damage on
illustrate the invention comprises a bushing I
having a cylindrical hub or collar Zand a pe
the spindle results.
The present invention contemplates making
ripheral flange 3, the hub or collar beingV provided
the bushings in certain standard spindle sizes such
as ,1, 11/4, 1,1/2, 1% and 2 inches in diameter, all
standing projections or notches 4 adapted Yto be
with an inside tolerance of approximately plus
.003. For example, abushing that is to be ñtted
onto a spindle of 11A inch diameter, the .inside
.dimension of the Abushing is 1% plus .O03 or
1.253 inches in diameter. The bushing although
preferably made of suitable metal of relatively
light weight having sufficient strength and rigid
with >a plurality ofsubstantially triangular up
' 'embedded in the materialof the rpolishing wheel
5 and thereby permanently and rigidly anchor
the bushingwin place. To facilitate insertion and
to guide the hub or collar of the bushing into
the opening in the polishing wheel, the edge of
this hub or collar is tapered or feathered at 6.
In the assembly of the bushing I in the pol
ity to prevent distortion, may 'be constructed of
ishing Wheel, it may be pressed into the opening
any other material including plastic, rubber or 55 1 of either a new or old wheel by any suitable
and provided with a peripheral flange and a hub
One method that may be employed is
portion, the latter adapted to be pressed into
to use the polishing lathe spindle 8 as a screw
the opening and anchoring projections formed
press. All that is required is to reverse the
flanges 9 and IE! as shown in Figure 3 and by
tightening the nut l l, the bushing or bushings are
forced into the opening 1 and anchored therein
by the projections, notches or> tongues 4 as shown
in Figure 4. Thereafter the nut il is backed off
from the material of the hub and adapted to em
bed in the material of the wheel as the bushing is
pressed into the opening.
inserted and anchored in the opening of a pre
or unthreaded, and flange i0, polishingY wheel
and flange, 9 removed in sequence. The flange 9 . 4 (l
is then reversed and again applied to the spindle,
after which the polishing Wheel is slipped over
the spindle, the ñange I0 applied and the nut Il
drawn tight to lock the polishing wheel in oper
ative position as shown in Figure 5, where> a sin
gle bushing is employed. Generally but one
bushing need be employed, butV wherethe thick
ness of the Wheel warrants, two may be applied.
These bushings are of light weight material
such as approximately 16 gage drawn steel, al
thoughfany other metal, or other- substance in
cluding plastics, hard rubber or rubber-like com
positionshaving sufficient inherent strength and
rigidity to withstand thev conditions of> opera
tion, may be used.l
, .
Whereas by theold method it was necessary
to. bore an opening approximately 1/8 inch. less
in' diameter than the diameter of the spindle on
*which` the Wheel was mounted, and to then spin
2. A bushing adapted to be readily and easily
formedl and standard construction of polishing
wheel, comprising a collar adapted to1 be pressed
into the opening and of such length as to accu
rately mount the bushing in the opening and
maintain the concentricity of the wheel, a flange
formed at one end only of the collar and adapted
to bear against aface of the Wheel, and spaced
projections on the circumference of the collar
which' become embedded in the material of the
wheel when the collar is forced into the opening
and thereby anchoring the bushing in the wheel.
3. A bushing adapted to be mounted in a cen
trally disposed openingv in a new yor old polish
ing wheel, consistingV of* a member formedv of. a
light vweight substantially rigid-material providing
Va collar adapted to be forced into the opening, a
i flange at one end of the collar adapted' to seat
against a side of the Wheel' as the collar of the
bushing is forced into the opening, and means
on the collar for anchoring> it into the material
of the wheel surrounding the opening when the
~the' motor lathe spindle to mount thewheel, by 30 collar is forced into this opening.
4. In a standard' construction of polishing
the'ïuse-of the present novel bushing, the wheels
are bored to the-size of the spindleand thewheel
applied with the spindle stationary. For eX
ample, if a polishing Wheel is to bemounted on a
‘wheel adapted to be mounted on a lathe spindle
and provided with a centrally disposed opening,
a bushing having a hub adapted t0 be received
11/4 inch spindle, the opening lI is bored to that 35 in the opening, spaced projections on the hub
adapted> tof‘oecorney embeddedv in the material of
.diameter and a 1% inchbushing is inserted. As
the wheel when the hub is pressed into the open
this bushingY has an internal diameter of approx-ing for anchoring the bushingtherein, and a pe
imately v.003 inch larger than the diameter of
ripheral» flange on onel end only of»y the hub for
the spindle, itis not forced over thespindle and
there is-no danger of damage theretoregardless 40 locating the bushing in the wheel adapted to abut
against a side of4v the wheel when the hub is
of how often the Wheel is assembled or replaced;
pressed into the opening.
Furthermore, as the wheel is applied to thespin
5. A- bushing adapted to be readilymounted in
dleï when stationary, there is no danger to the
The hub or collar 2 is of such construction and
length that the Wheel is properlyrcentered at all
times. and-under all operating conditions. In the
prior` devices where> the polishing wheel was pro.
vided witlraA smaller hole fitted or threaded over
a larger spindle, considerable friction resulted
which not only caused wearV on the spindle but
also distorted- thehole or openingA so that the
Wheel would be looseor hang onuthe spindle. The
wheel- being- out of'> balance necessarily resulted
in chatter.
The present novel bushing has universal appli
_ cationl to anyl of thel Various types-oi?Á polishing
wheels now onl the market regardless of the ma
terial of which the wheel is made, and islof such
inexpensive construction that it adds but little to
thecost oi- the wheel.
Havingl thus disclosed my inventiony I> claim.:
i 1. A- bushing adapted to be pressed intoand
automatically locked in a centrally disposed‘open
ing in a preformed polishing wheel, consisting of
a member formedV of relatively thin gauge metal
either a new or oldpolishing wheel‘- by.` the user,
consisting of a collar adapted toloerpressed into
the opening and' an integral» flange at one end
only of the collar- and abutting against aside of
the wheel when the collar is inserted to its proper
depth, said collar being provided with a plurality
of notches with integral projections so disposed as
to anchor in the material ofthe wheel for se
curing together the wheel andv bushingV and pre
venting» the bushing from turning inthe wheel.
6. A bushing adapted to be readily assembled
in` anopening ina new or- old polishing Wheel, com
prising a collar having an annular, peripheral
flange at one end andl its other end> tapered to
facilitate assembly and to guide the collar into
the opening, projections formed from the mate
` rial of the collar and projecting/outwardly there
from in suchimanner that as the collar ispressed
into the opening, these projections interlock with
the material of the wheel and` preventuninten
tional removal or turning ofl the bushing inthe
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