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Патент USA US2136056

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Nov. s, 193s.
c, A, MOORE
2,136,056
WASHING MACHINE `
Filed Nov. -15. `195e
54
_l
v229
INVENTOR.
¿i4/’Z275 d Moore.
ATTORNEY.
Patented Nov. 8, 1938
_2,136,056
UNITED STATES
PATENT orrrcr;
2,136,056 ,
WASHING MACHINE
Charles A. Moore, Detroit, Mich., assigner to Borg
Warner Corporation, a corporation of Illi
nois
Application November 13, 1936, Serial No. 110,558
10 Claims.
This invention relates to washing machines
and has particular reference to driving mecha
Ch
nisms therefor which are capable of imparting an
power for the mechanism lies without the cas-l
ing, but this is true in most cases. By a System
of linkages and gearing, it is seen that, in a
oscillatory rotary motion to the agitating means
novel manner, the same power that drives the
employed therewith.
Washing machine agitator also drives the wring
'
The principal object of this invention is to pro
vide a novel form of driving mechanism for a
washing machine agitator having an oscillatory
rotary agitating action which offers a greater
angle through which the agitator shaft operates
than has heretofore been realized and which,
therefore, lends smoother operating qualities to
er.
This driving power comes into the mecha
anism through a horizontally disposed worm
shaft and is transmitted simultaneously there
from to the wringer shaft through a crank wheel
and therefrom to the agitator shaft through al
plurality of cranks. The resulting effect is that
the agitator is given a greater than customary
the machine as a Whole for a longer period of
arc of travel, thus producing a longer and
time.
smoother agitating action.
-
Another object of this invention is to provide
an improved and simplified form of driving
mechanism for washing machines employing an
agitating means adapted for oscillatory rotary
motion, and which requires a very small amount
20
(Cl. 74-71)
of housing space.
'
Another object of this invention is to. provide
For a better understanding of rmy invention
reference may be had to the following drawing
of which there is one sheet and in which:
Fig. 1 is a front View of a washing machine
and wringer unit with a portion thereof cut away
and illustrating the adaptability of my invention; 20
and
Fig. 2 is a horizontal view shown _partially in
a washing machine driving mechanism of the
type to be described which offers a very small ' section of the mechanism embodied in my inven
opportunity to get out of working order because
25. of its durability, and which offers a very high
efficiency during operation.
_.
Another object of this invention is to'provide
a novel form of transmission for washing ma
chines which operates silently, smoothly, and
30 with a consumption of less power than in the
past.
`
Another object of this invention is to provide
a washing machine gear mechanism which im
parts an oscillatory rotary agitating motion t0
the washing machine agitator and which is ca
pable of distributing its forces equally throughout
the various parts of the mechanism at all points
of the operating cycle, thus materially eliminat
ing cycle “dead-center” effects.
Another object of this invention is to provide a
washing machine transmission of the class to be
described which is made up of a minimum of
parts and which olfers, among other things, a
very small initial cost as well as a very small
'
45 operating cost.
Another object of this invention is to provide
a novel system of linkages and gearing cooperat
ing in a small space to give the agitator of a
washing machine an oscillatory rotary motion.
50
As illustrated in the drawing, the entire gear
ing and linkage system for the washing machine,
as well as part of the mechanism used in con
junction with the wringer, is disposed and con
lined within a casing located near the bottom
5,5-, of the WasherA tub. It is true that the motivating
tion and adapted for use in a machine such as
that illustrated in Fig. 1.
25
.' As illustrated in Fig. l., there is shown a wash
ing machine, generally indicated at lll, compris
ing supporting legs I 2, a tub'id, a removable
cover I6 therefor, and an impeller-type agitator,
generally indicated at I8. The lower portion 20 30
of the washing machine l0 is devoted to housing
the gearing mechanism for the apparatus. A
manual control 22 is workably associated with
the mechanism for selectively operating or shut
ting off same. Supported by the washing ma 35
chine at one side thereof is a wringer, generally
indicated at 24, which is mechanically associated
with the mechanism disposed in casing 20 by
other >(and undisclosed) mechanism disposed
within a housing, generally indicated at 26.
Fig.,2 illustrates the washing machine trans
40
mission which is adapted for use in a machine
such as that illustrated in Fig. 1. This mech
anism is shown asbeing completely housed with-4
in the casing 20, said casing being suitably sup 45
ported by the washing machine by means of
cap screws 28 which pass through holes 30 of
casing 2t and are threaded into appropriate
threaded portions of the base of the Washing
machine.
50
A worm gear 4U is horizontally disposed with
relation to the mechanism shown in Fig. 2 and is
motivated by a motor (not shown) or by some
other `appropriate driving device. Gear 4l] is
adapted to be engaged at one endthereof, through 55
2
2,136,056
a gasket 4I, by a threaded adjusting means 42
which is threaded into a section provided there
machine such as that disclosed in Fig. 1 is out
for in casing 28. By means of this member 42,
worm gear 40 by som-e appropriate driving means
operates to rotate the crank heel 48. As wheel
48 rotates, it carries with it the crank arm 54
which ispivotally mounted on one of the spokes
52 of said wheel. Rotation of wheel 48 also causes
rotation of the wringer shaft 58 because of the
the end thrust of gear 40 is thus relieved.
The
adjusting operation is accomplished by the re
moval of an internally threaded nut member 44
which is threaded onto the end of member 42, and
the manual turning of member 42 to its desired
position. A slot 45 is provided therefor. An an
10 nular gasket 46 is disposed between nut 44 and
A crank wheel 48, provided with peripheral
teeth, is properly positioned and supported for
rotary motion by a stub shaft 5D. Wheel 48 is
15 disposed with relation to worm gear 40 in such a
way that rotation of gear 46 about a ñXed hori
zontal axis gives wheel 48 a rotation about a fixed
vertical aXis. Toi one arm 52 of crank wheel 48
is secured, for pivotal movement thereabout, a
20 crank arm 54. This pivotal movement of crank
arm 54 is caused by a fulcrum pin 56 which is
fixed to arm 52 of wheel 48 and is loosely asso
ciated with arm 54 by passing up through a hole
provided therefor in arm 54, so that rotary mo
tion of wheel 48 causes arm 54 to move freely
about its fulcrum point 56.
Practically on a line which is normal to the
tangent at the point of contact between wheel
48 and gear 48, and which passes through the
y center of the cross section of stub shaft 56, is
disposed a wringer shaft 58 which carries a
wringer drive pinion 60. The distance between
the axes of crank wheel 48 and wringer shaft 58
is such as to allow the teeth of pinion 66 to
3.5 properly mesh with the teeth of crank wheel 48,
so that the rotary motion transmitted from gear
45 to wheel 48 is transmitted therefrom to the
‘.vringer shaft 58.
Slidably mounted on wringer shaft 58 is a
crank arm 62 one end of which is provided with a
fixed pin 64.
mechanical association between each of these
members. Another arm 62 which is slidably 10
mounted on wringer shaft 58 is pivotally secured
casing 20.
2.5
standingly simple in operation. Rotation of the
Pin 64 is adapted to loosely engage
with a hole provided in one end of crank arm 54
and be inserted therein for both driving and
governing the motion of the means utilized in
45 this invention for driving the agitator shaft.
To the other end of arm 54 there is secured,
for pivotal movement thereabout, another crank
arm 66 which is pivotally secured to said end of
arm 54 by means of a pin 68. Arm 66 cooperates
507 with crank wheel 48 to transmit the motion there
of to a driving segment gear 68 which is pivoted
at a point l0 for oscillatory motion thereabout.
Gear 68 and arm 66 are pivotally connected by
means of a pin 12 which is inserted in holes pro
55 vided therefor in one end of each of said ele
ments.
Pivotal point 18 of segment gear 68 is disposed
with relation to the mechanism in such a way as
to allow the teeth of said gear to properly mesh
60. with the teeth of an agitator drive pinion 14
which is carried by the agitator shaft 16. It will
be noted that segment gear 68, the driving mem
_ber for the agitator pinion 14, is provided with
a greater number of teeth than said pinion, thus
insuring an oscillation of pinion 14 back and
forth through an arc greater than 360°.
Although it has not been disclosed, it might be
pointed out that the agitator pinion 14 is slidably
mounted on the agitator shaft 16 and is engage
70 able with a clutch member (not shown) ñxedly
mounted on shaft 16, said clutching mechanism
being manually operable by means of the shift
handle 22.
The mechanism which is disclosed in Fig. 2
75 and which is adapted for use with a Washing
at one end thereo-f to one end of arm 54.
The
other end of arm 54 is pivotally secured to one
end of another arm 66. The other end of arm
66 is pivotally secured to one end of the driving 15
segment gear 68. Said driving gear is pivotally
secured to a stationary portion of the washing
machine frame so that the gear will oscillate back
and forth about its pivot point according to the
rotation of gear wheel 43 and the linkage system 20
connected thereto. The peripheral teeth of seg
ment gear 68 are engageable with the peripheral
teeth of the agitator pinion 'I4 for driving same.
As the crank wheel 48 is rotated in a counter
clockwise direction by means of worm gear 40, the 25
crank arm 54 is adapted to pendulate about its
pivotal point 56 as well as rotate about the axis
58 of wheel 48. 'I‘his oscillatory rotary motion
given to crank arm 54 by crank wheel 48 causes
the pivoted end l2 of crank arm 66 to reciprocate 30
back and forth along a definite and well defined
arc.
This motion of crank arm 66 necessarily
imparts an oscillatory motion to segment gear
68, said motion being about the fixed point l0.
The segment gear 68, in turn, imparts this oscil
latory motion to the engaging agitator driving
pinion 14. The arrangement of the parts of the
mechanism, and the selective choice of the num
ber of teeth on both the segment gear 68 and
agitator pinion 14, combine to give the agitator 40
shaft 'I6 an oscillatory rotary motion back and
forth through an arc greater than 360°. It will
be seen that this feature necessarily renders an
agitating action which is both smoother and more
continuous than agitating actions of the past.
45
It is not intended that the invention should
be limited to the exact structure illustrated here
in, this being shown merely for the purpose of
providing a practical embodiment of the inven
tion on which the appending claims are drawn 50
to cover any of the forms, applications, modifica
tions, and embodiments in which the invention
may appear.
I claim:
1. Drive mechanism comprising a driven shaft 55
with driving means thereon, means driven by
said driving means for driving another shaft,
and means associated with said second men
tioned means for driving another shaft about its
axis through an arc of greater than 360°, first 60
in one direction and then in the other, said
third mentioned means being pivoted about one of
said shafts.
2. Drive mechanism comprising a driven shaft
with driving means thereon, means engaging said 65
driving means for being driven thereby, means
engaging said driven means for driving a second
shaft, a rotatable segment driving means, and
means cooperating with said second mentioned
means and said segment driving means for driv 70
ing a third shaft through an arc of greater than
360°, first in one direction and then in the other,
and being fulcrated at one end about the axis
of one of said shafts.
3. Drive mechanism comprising a driven shaft 75
2,136,056
3
rotatable about a fixed axis and having driving
of said rotatable gearing means and an end there
means thereon, driven means associated with
said driving means to be driven thereby and ro
tatable about an axis perpendicular to said other
vof adapted for describing an arc of predeter
axis, shaft driving means associated with said
driven means to be driven thereby and rotatable
about an axis parallel to said second mentioned
axis, a pivoted driving means driven by said ñrst
mentioned driven means and adapted for having
10 the center thereof describe a circle about the axis
of said driven means, and shaft driving means
associated With said pivoted means and oscil
latable about an axis parallel to said second
mentioned axis through an arc of greater than
360°, first in one direction and then in the other.
4. Drive mechanism comprising a driven shaft
rotatable about a fixed axis and having driving
with driving means thereon, a driven member ro
means thereon, a driven means engageable with
said driving means and driven thereby about an
20 axis perpendicular to said first mentioned axis,
means driven at a central portion thereof by
said first mentioned driven means along an arcu
mined radius.
7. Drive mechanism comprising a driven shaft
tated by said driving means, a pair of shafts
driven by said driven member, a plurality of
cranks and a pivoted driving member, one of
said shafts being adapted to be driven directly
by said member, the other of said shafts being
adapted to be driven indirectly by said member
through said plurality of cranks and said pivoted
driving means, one of said cranks being pivotally
mounted on said driven member, another of said
cranks being slidably mounted on one of said pair
of shaftsA and pivotally mounted on said first meri
tioned crank, another of said cranks being piv
otally mounted on said first crank and on said
pivoted driving means for the other of said pair
20
of shafts.
8. Drive mechanism for driving a shaft com
prising a drive shaft with driven means thereon
ate path, and means associated with said central a pivoted driving member for driving said driven
driven means and driven thereby oscillatably means, another driving member adapted for ro
tation, means comprising a pair of pivoted arms 25
about a ñxed axis parallel to said second men
cooperative with said last two driving members
tioned axis.
5. Drive mechanism comprising a driven shaft -for imparting to said driven means a driving
force in consecutively opposite directions about a
with driving means thereon, a gear Wheel en
gageable with and in the same plane as said fixed point, said means comprising two free pivot
points and a pivoted connection to said pivoted 30
30 shaft and driven thereby, a pivoted segment gear
cooperative With said gear Wheel for oscillating driving member, and external driving means for
about its pivot, and a pinion engageable with said said mechanism.
9. Washing machine transmission comprising,
segment gear and driven thereby about an axis
through an arc of greater than 360°, first in one
35 direction and then in the other, said last men
tioned pinion having less teeth than said seg
ment gear and means for causing cooperation
between said pivoted segment gear and said gear
wheel comprising three levers connected at sepa
rate points on one of said levers.
6. Mechanism for imparting an oscillatory ro
tary motion to a shaft including a driven shaft
with driving means thereon, rotatable gearing
means associated with said driving means for
45 being driven thereby, a rotatable shaft associated
means for driving said transmission, a member
rotatably driven by said means, a lever pivoted 35
near its center about a point on said member
away-from the axis of the latter, a pair of links
each fulcrated at an end about opposite ends
of said lever, the other end of one of said links
being pivoted for oscillation about a fixed axis, 40
and the other end of the other of said links being
pivoted for oscillation about a movable axis.
10. Washing machine transmission comprising,
means for driving said transmission, a rotatable
member in driven relationship with said means, a 45
with said gearing means for being driven thereby, floating lever driven by said member and having
another shaft adapted for oscillatable rotation, a point common therebetween describing a path
means for imparting said rotation to said last around the axis of said member, a pair of shafts,
mentioned shaft, and means for actuating said ` and a pair of links one end of each of which being
means,
said actuating means being mechanically pivoted about opposite ends of said lever, one of 50
50
associated with said rotatable gearing means and said shafts being rotatably driven by said rotata
said imparting means for oscillatably rotating said ble member, the other of said shafts being os
last mentioned shaft back and forth through an cillatably driven by an end of one of said links.
arc of greater than 360°, the center of said actu
CHARLES A. MOORE.
ating means describing a circle around the axis
55
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