Патент USA US2047841

‘July 14, 1936.
w. VAN GUILD'ER
2,047,841
MIXING DEVICE
Filed May 23, 1935
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Inventor:
Waiter Vah Guild
by .
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His Attorney.
2,047,841
Patented 'July 14, 1936,
UNITED STATES‘ ‘PATENT OFFICE
2,047,841
MIXING DEVICE _
Waiter Van Guilder, Oak Park, 111.,
or to‘
General Electric Company, a corporation of
_New York
ApplicatiomMay
{1935, Serial No. 22.993
4 Claims. (01. ass-102)
are secured to a driving hub IS. The loops l3,
as shown in Figs. 1 and 2, are considerably wider
than the loops ll.
The hubs I5 are rotatably mounted upon stud
shafts l6 that are rigidly secured to the yoke
l2. For this purpose, the upper ends of the stud
shafts are received in suitable bores I‘! provided
for them in the yoke, and are provided with
This invention relates to mixing devices, more
particularly to power operated food mixing de
vices, and it has for its object the provision of
an improved beating tool in devices of this char
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acter.
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In one of its aspects, this invention contem
plates the provision of an improved mixing tool
provided with suitable beating elements and ar
ranged so that the tool automatically selects the
correct beating or mixing speed for the elements
responsively to the consistency of the material
being mixed.
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,In accordance with this invention, the mix
ing tool, in one form thereof, is provided with a
15 driving shaft which is‘ arranged to be driven by
the mixing machine that usually is provided
with an electric motor for operating the shaft.
One or morkpreferably two—beating elements
are mounted to rotate in a suitable supporting
20 yoke, which in tum'is ,arranged to rotate about
the driving shaft as an axis. The driving shaft
is positively connected, as by gearing, to the
} beating elements so that when the shaft is op
erated the beating elements will be rotated on
'25 their own axes in theyoke. Moreover, the yoke
will be rotated about the driving shaft as an
axis due to the resistance of the material being
beaten to the rotation of the beating elements.
The speeds of rotation of the beating elements
30 and of the, yoke depend upon the consistency
of the' material being worked.
i
For a more complete understanding of thi
invention, reference should be had to the ac
companying drawing, in which Fig. I is an end
35 elevation of a mixing device provided with a
beating tool arranged in accordance with this
invention; Fig. 2 is an enlarged vertical elevation,
partly in section, of a beating tool arranged in
accordance with this invention; Fig. 3 is a sec
40 tional ‘view taken through the line 3-3 of Fig.
2 with certain parts'of the tool removed so as
to illustrate certain structural details; and Fig.
4 is a diagrammatic view illustrating the op
eration of the beating tool.
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Referring to the drawing, this invention has
been shown in one form as applied to a mix
rough knurled portions l8 arranged to coact
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with the metal walls of the yoke to prevent move 10
ment of the shafts l6 relative to the yoke.
Mounted upon each of the hubs I5 is a driv
ing gear 19. It will be understood that the gears
iii are rigidly secured to the hubs so as to ro
tate with them. The lower ends of ‘the hubs
pass through suitable apertures provided for
them in the loops l3 and I4, as clearly shown in
Fig. 2, and are provided on their lower'ends be
neath the loops with shoulders 20. Resting upon
the shoulders 20 below the loops are washers 20
2| and mounted above the loops are second
washers 22. Between these washers and the
gears l9 are suitable spacer sleeves 23. The'up
per end of each hub is provided with a ?ange
24 which bears against the gear l9. In, view of 25
the foregoing arrangement, it will be observed
that the hubs l5 are rigidly secured to the beater
elements II and to the driving gears IQ for the
beater elements. The lower ends of the driving
hubs l5 and the shafts vl6 are closed by means 30
of suitable covers 25.
Preferably and as shown, the yoke will be
so arranged that its walls define a chamber 28'
in which the gears l9 are rotatably mounted.
Also mounted within this housing is a main driv 35
ing gear 21 which is rigidly secured to the driving
shaft 28.
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The yoke 12 is provided-with bearings 29 to
rotate upon the shaft 28. The bearings 29, as
shown, are arranged in a bore 38,.each bearing 40
being provided with a ?ange 3| fitted over the
ends of the bore, as shown in Fig. 2. The upper
bearing 29, as viewed in Fig. 2, is heldwithin the
bore by means of a collar 32 rigidly secured to the
shaft 28, while the lower bearing is secured in 45
place by means of the driving gear 21. . For this
ing tool i0 comprising a pair of heating elements
purpose, the end of the‘ driving shaft 28 is pro?
,1]. Y The heating elements
vided with a threaded portion 38 which receives a
nut 3|. The nut 34, as shown, secures the gear 21
II
are rotatably
‘mounted in‘ a suitable supporting yoke l2. As
50 shown, each beating element ll comprises a pair
of wire loops l3 and I4 arranged at right‘ an
gles to each other, and rigidly secured to each
_ other at their upper and lower ends. At their
lower ends, the loops preferably are secured by
55 spot welding, while the upper ends, of the loops
to the driving shaft. The nut also has a non 50
circular cross-section, such as a rectajn's'l?ar'sec
tion, which is received inan aperture of corre- '
sponding ‘shape in the gear 21, whereby a driving
connection is effected between the driving shaft
and-the 8&81'.
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2,047,841
As shown, the beating elements are arranged
to rotate on axes substantially parallel with each
other and with the axis of the shaft 28, and sub
stantially equidistant from the axis of shaft 28.
In the particular tool shown, the shaft 28 drives
the gear 21 in a clockwise direction looking up
wardly at the gear, as indicated by the arrow, in
Fig. 4, while the gears i9 are driven in a counter
clockwise direction, as indicated by the arrows as
sociated with them. When the heating elements
are rotated in this direction, the tendency is for
the yoke I2 to rotate in a clockwise direction, as
indicated by the dotted circle in Fig. 4 and the
arrow associated with it.
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The lower ends of the beating elements are sup
ported in spaced relationv relative to each other
by means of a wire supporting member 35. - The
wire supporting member is provided at its ends
with up-turned portions 38, as shown in Fig. 2,
20 received in suitable apertures provided for them
in the lower ends of the loops l3 and It.
The chamber 28 is closed by a cover 31 which,
as shown, is provided with apertures for receiv
ing the spacer sleeves 23. ' The cover is made in
25 two parts 31a and 31b (Fig. 3), each of which is
secured to the yoke l2 by means of a snap spring
38 secured to the housing and engaging ears 310
provided on the cover member.
The driving shaft 28 may be driven by any suit!
30 able power driven mixing device, such as that
shown in Fig. 1. As shown, in this ?gure, there
is provided a housing 39 in which a suitable op
erating motor (not shown) is mounted. This
35
motor drives a ?exible shaft 48 mounted in a
suitable casing 4|. The shaft 28 is arranged to
be mechanically connected to ‘the operating shaft
‘ 48 by any suitable mechanical connection 42. the
details of which form no part of this invention,
and which have not been shown in detail.
Associated with the power device 39 is a suitable
receptacle 43 in which the beater tool I0 is ar
, ranged to operate. "
In the operation of the device, it will be understood that the driving shaft 28 will be driven
45 from the‘motor mounted in the base 39 through
the ?exible shaft 40. When the shaft 28 is oper
ated, it will of course operate the driving gear 21,
which in turn ‘will operate the gears l9 secured
to the beater elements I I, and the yoke l2 due to
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the reaction of the food being mixed on the beater
_ elements I I.
In other words, the driving torque of the shaft
28 is divided into a force applied to rotate the
yoke l2. about the shaft 28 as an axis, which of
course swings the beater elements Ii as a whole
about the shaft 28 as an axis, and a second force
applied to rotate the beater elements about their
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own axes on the shafts I8. The speed-of rota
tion of the beater elements “on their own axes,
and that ofthe yoke l2 on the shaft 28 as an axis
will depend upon the consistency of the material
being beaten. Thus for example, if the beater
is operating in _a mixture having a very light con-i
65 sistency, the resistance against rotation of the
entire tool. including the yoke l2, together with.
the beater elements I I mounted thereon, around
the shaft 28 as an axis will be very slight, and
creases. 'If the mixture be made still thicker, the
yoke will slow down still more, while the speed
of the beater elements will increase proportion
ately.
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The operation of the beating tool depending 5
upon the consistency of the material being beaten
affords a safety device which prevents over-load
ing of the motor driving the shaft 28, because
when the mixture‘becomes very heavy it merely
means that the beating elements II will ‘rotate at
a higher speed on their own axes while the yoke I2
will slow down.
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Furthermore, it will be observed that the beat
ing tool automatically selects the most e?icient
speed for beating as well as requiring the mini
mum power.
While I have shown a particular embodiment of
my invention, it will be understood, of course, that
I do not wish to be limited thereto since many
modi?cations may be made, and I, therefore. con 20
template by the appended'claims to cover any
such modi?cations as fall within the true spirit '
and scope of my invention.
What I claim as new and desire to secure by
Letters Patent of the United States is:
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1. A mixing device comprising a driving shaft,‘
means for driving said shaft, a beating element
adapted to act upon materials to be mixed, 9.
support for said heating element, a shaft on said
support mounting said beating element for 30
rotation on said support on an axis removed from
the axis of said driving shaft, means mounting
said suppport for free rotation about said shaft
as an axis, and means mechanically connecting
said beating element with said driving shaft so 35
that said element will be positively driven on its
shaft by rotation of said driving shaft and said
supporting means is driven on said driving shaft
as an axis due to the reaction of said materials‘
on said beating element at speeds dependent upon 40
the consistency of said material.
2. In a mixing device provided with an operat- ,
‘ing shaft, a beating tool adapted to act upon
material to be mixed comprising a driving shaft
adapted to be driven by said operating shaft, a
support journaled on said driving shaft for free
4.5
rotation‘ thereon, beating elements mounted on
said support for rotation on axes symmetrically
arranged with reference to the axis of rotation of
said driving shaft and of said support on said 50
driving shaftand gearing between said beating
elements and said driving shaft whereby said
elements are positively driven on their axes in
said support by the operation of said driving shaft
and said support is rotated on said shaft to move 55
said beating elements bodily around said shaft
as an axis due to the reaction of said material
on said elements.
3. In a mixing device provided with an operat
ing shaft and means for driving said shaft, a 60
mixing tool comprising a driving shaft adapted
to be driven by said operating shaft, a frame
journaled on said driving shaft for free rotation
relative to said shaft and about said shaft as an
axis, a pair of beater elements symmetrically 65
arranged on opposite sides of said shaft and jour
naled in said frame for rotation on axes par- ‘
consequently, the beater elements I I will be swung allel with each pther and with the axis of said
70 around in the bowl 83 at practically the speed 'dnving shaft, gears secured to said beater ele
of the driving shaft 28, and will rotate at a very. ments and a gear secured to said driving shaft 70
slow speed on their own axes. However, if the meshing with said gears secured to said beater
mixture is thickened, the resistance to rotation
' - of the entire unit on‘ the shaft 28 becomes greater,
4. In amixing device provided with a driving
75 and as a result, the yoke slows down and the ro
motor, a beating‘ tool comprising a shaft adapted
tation of the beaters H on their own axes in
to be driven by said motor, a frame provided with 75
elements.
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2,041,“: I
a
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‘ walls de?ning a housing, means journaling said
>is positively imparted to said elements ‘to rotate _
frame for tree rotary motion .upon said shait, on their own axes in said frame and said frame
a pair of beater elements Journaied in said frame a together with said elements is rotated as a'whole
on opposite sides of the axis of rotation 01' said about said shait as an axis due to the reaction
shaft, gears within said housing secured to said
beater elements, and a ‘gear within said housing
secured to said shaft meshing with said gear se
cured to said heater element. whereby motion
‘of the materials worked upon to the action or said 5
beater elements.
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WALTER VAN GUIIDER.