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Патент USA US2107540

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Feb. ‘8, 1938.
E. H.‘ LlC-HTENBERG
2,107,540
POWER ‘JAKE-OFF"
Filed Dec. 22, 1953
5 Sheets-Sheet 1
dbtowwqa
Feb. 8, 1938.
E. H. LICHTENBERG
2,107,540
POWER TAKE — OFF
Filed Dec. 22, 1933
5 Sheets'-Sheet 2
Feb. 8, 1938.
I
- E; H_ LICHTENBERG
2,107,540
POWER TAKE-OFF
Filed Dec. 22, 1953
5 Sheets-Sheet 3
gwomtoc
58,
E. H. :LICHTENB‘E'RG
2,107,540
POWER TAKE~DEF
Filed Dec. 22, 1933
5 Sheets-Sheet 4
6
12,,
58
9
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i? ?
Patented 'Feb. 8, 1938
2,107,540
UNITED STATES PATENT OFFICE
2,107,540
rowan TAKE-OFF
llrlch H. Lichtenberg, Milwaukee, Wis” assignor
to Koehrlng Company, Milwaukee, Win.’ a cor
poration
Application December 22, 1933, Serial No. 703,655‘
12 Claims.
This invention relates to power take-oil means
and control ‘instrumentalities therefor, and is
particularly adapted for use in connection with
mixing machines, however is not limited to such
6 speci?c employment and may be used in other
capacities if so desired.
-
The teachings of this invention are especially
applicable for use in connection with that class
of machines known as bituminous mixers that are
) peculiar to other types of mixing machine in
that the mixing drum is held stationary during
mixing' operations and agitation is obtained
through power driven blades. The drum, however, is rotatable to various positions to allow the
discharge and charging thereof and this inven
tion is concerned primarily with means for so
moving the drum. Heretofore this task has been
carried out manually through gear and hand
wheel arrangements that did not contribute con
) siderably toward speeding up the interval of han
dling the material, which embraced the period
beginning with~loading and ending with com
plete discharge. To say the least, the task was
laborious even though these simple mechanical
devices were employed, and without doubt, move
ment of the drum was slow, and as a corrolary
to- this thought, control over the drum was not
positive so that it- could be stopped at a prede
termined point.‘ It is to be appreciated that these
mixing drums handle at least six to twelve cubic
,feet of, material and the momentum imparted
arising from the overbalancing of the load as the
,
(01. 83-73)
‘
‘
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' '
to loading position. In other words, the unload-v
ed drum may be “kicked’? to occasion the free
rotation thereof to loading position. A slightly
different control arrangement affords a positive
application of power for rotation of the drum in 5
one direction and stopping-oi’ the drum is made
incident to the rotation thereof to -ya predeter- .
mined point.
“
'
v
Other objects and advantageous features of
this invention will be found in the following de- 10
tailed description and accompanying drawings,_
wherein like characters 'of reference indicate like
' parts, and wherein-
_
>
Figure 1 is a perspective view of a bituminous
mixer embodying my novel power take-01f ar- 15
rangement for rotating the mixing drum, with
the preferred form of control instrumentalities
associated therewith.
'
Figure 2 is a sectional view of my power take
off unit, showing the preferred form of control 20
instrumentalities therefor.
Figure 3 is a front elevation of the operating
levers.
’
Figure 4 is a fragmentary view showing the
positional relation of the operating parts at one 25
stage in the operation.
'
‘
'
Figure 5 is a front view of the power take
oif unit disclosing the positional relation of the
parts at another stage in the sequence of opera
tion.
‘
'
.
-
30
~ Figure 6 is a section taken on the line 6-4 of
Figure 3.
‘
drum rotates to discharge position may be more ‘
Figure '7 15.9. fragmentary elevation showing a
than the operator can control. ' It is the aim of: modified form of control mechanism for the
this invention then, to provide means for rotat
ing and controlling the rotation of such a de
vice as the mixing drum of a bituminous mixer
and by virtue of which anadvantageous appli
cation of power may be obtained for moving the
power unit.
.
35
Figure 8 is a partial section taken ‘on the line
8-3 of Figure 7.
'
'
'
Figure 9 is a section of a. modi?ed form of
power take-oil? arrangement and ‘operating in
drum to its various positions while at the same 1 strumentalltles.
time affording means for positively controlling
the momentum.
In realizing the above desideratum, I have de
40
Figure 10.is a view of the control instrumen
talities for the'brake of Figure 9, or 1 to 8 m
clusive.
_
v
_
vised a novel form of power take-off. which may
be driven from the prime mover ,of the mixer
' to actuate the mixing drum. In connection with
other form of control mechanism for the unit of 45
this power take-oil, I have devised certain con‘
Figure 12 is an elevation of another form of
Figure 11 is a fragmentary elevation of an- '
Figure 9.
I
,
trol instrumentalities that in one form are ef .control instrumentalities for the power take-oi!
fective to effect a positive application of power unit.‘
.
for rotating the heavily loaded drum to dump
,Figure 13 is a view similar to that of Figure 50
ing position under perfect control for stopping
the same at a predetermined point. This form
12, showing the control instrumentalitiea in one
position of adjustment.
-
of apparatus includes instrumentalities by means
Figure 14 is an end view of'the appartus shown
ofwhich an instantaneous application of force in Figures 12 and 13.
may be given to the empty drum to return it As a foreword, I propose to transmit‘ power 55
2,107,540
2
from a source to the drum of ‘a bituminous mixer
for rotating the same through a planetary gear
" ing arrangement. I have proposed, however, sev
‘eral types of control instrumentalities for op
erating this planetary gearing mechanism. Ac
the peripheral ?ange 60, said teeth meshing with
the planetary gears 5a The ?ange 68 on the left
side of the web o?ers a braking surface encom
passed by band 6!. The member 9 is keyed to
the sleeve ll of the driven member 12 by virtue
of the key ‘M, the sleeve being in turn mounted
cordingly, Figures 1 to 6 inclusive are devoted
'to the ‘preferred form of power take-off unit em
on roller bearings l5 spacing the same on the '
bodying the planetary gear transmission mech
shaft. The member I2 is disc-like in con?gura- ,
anism and the control instrumentalities therefor.
tion and is intended to be bolted by a bolt and
nut arrangement at It to some device to be
10 Figures 7 and 8 disclose the modi?ed form of
‘control instrumentalities for the power take-off‘ driven, say for instance, the drum C of ‘the bi
unit disclosed in Figures 1 to 6 inclusive. The tuminous mixer. To support the power unit, I
power take-off unit of Figure 9 is- basically the have provided a bracket member N which may
same as that shown in the preceding ?gures, belsecured to some part of the frame of the mixer
or to any convenient .support if the device is not
15 however, modi?cations in control instrumentali
ties therefor are shown in Figure 11. The re
maining ?gures ‘are devoted to a power take
off unit essentially the same as that proposed and
shown in the other ?gures but which proposes
T 20 still other control instrumentalities for subserv
iing slightly diiferent ends than that advanced
for the disclosures of the other ?gures. Figure
10 is devoted, to a brake control that may be
adapted to use on any one of the power take-offs
.
25'
shown._
-
Referring speci?cally now to Figures 1 .to 6, I
have shown in Figure 1 one type of apparatus
‘ which is especially ‘adapted to employ my novel
power take-oil’ mechanism.
This apparatus is
30 known as a bituminous mixer and embodies a
motor A mounted on a chassis B which supports
a mixing drum 0 within which is arranged an
agitator D.
The drum ‘C and agitator D are
mounted on a common shaft E driven by the
motor .A and supported in suitable bearings
mounted on ‘the framework in a manner which
will be clearly apparent. For the purposes of ex
employed with a mixer, and which encomposses
the sleeve ii in the zone 20. ' The planetary gears
5 areeach in mesh with a main shaft gear 2!
keyed on the shaft E which constitutes the driv
ing gear for rotating the planetary gears and
the other parts of the apparatus.
‘
The controls for the‘ friction band members
‘land 8 are best shown in Figures 2 to 5 inclusive,
and it is to be pointed out that the controls for
the band ‘I are separate and independent from
the controls for the “band 8 albeit the controls
for the band ‘I are effective to operate the control
for the band 8 for a particular purpose to be here
inafter brought out. Accordingly, with reference
to Figs. 2'and 3, the control members for the band
‘I include a lever 22 pivoted as‘ at 23 on a support
member 24 which takes the con?guration shown
in Figure 6 and which is drilled in its lower ?ange
‘to provide apertures 25 for the accommodation of
vmounting bolts. The short arm of the lever 22
is pivotally connected as at 26 to the looped end
21 of the band 1 whereas the opposing looped end
planation, ‘the. shaft E. Figure 2, may be con
28 of this same band is connected by a pin 29
sidered as the main shaft in this power take-oil"
to the upper end of the'support 24. It will be
40. arrangement, and- upon which the various ele
ments of the power take-off are arranged, albeit
obvious that by moving "the long arm of the lever
it will be understood that the shaft E may not
necessarily be the main shaft of'an apparatus
such as that'disclosed in Figure 1, and may be, if
45 desired, a stub shaft with proper coupling ar-_
gtalngiements' for connecting the same to a drive
a
.
This power take-off arrangement mounted on
the shaft E embodies a planetary gear system
50 wherein the arresting of rotation of one part
22 downwardly, the band will be tightened about
the peripheral ?ange 6 to arrest the rotation
thereof.
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v
The control instrumentalities for contracting
the band 8 include a lever 30 mounted on a brack
et 3|, Figure 2, formed as a part of the member 9,
the said member 30 being mounted thereon by
means of a pivot‘pin 32. The long arm of the
lever 30 is provided with a long pin 30', Fig. 2,
which overlies and is intended to contact with
will cause the rotation of a driven part in one the arm 22 when the same is in a substantially
direction and wherein a movement of the driven. - horizontal position as shown in Fig. 3. The short
part in a reverse direction is also obtained whilst .arm of the lever 38 is connected by a pin 33 to
the main shaft continues to rotate in one direc
the looped end 34 of the band 8. The opposing
tiononly.
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I'“
end of the band 8 is connected by a pin 35 to the
The arrangement which I preferably employ
bracket member 3|. Obviously by moving the
includes a circular gear carryingmember I
long arm of the lever 30 upwardly the band 8
mounted on the shaft E and freely rotatable with
respect thereto. Endwise movement of this mem
60 ber off the shaft is prevented by a washer 2 re
tained in position by a cotter-key or equivalent
v.means. . The radial'face of the member I is pro
vided with'a series of drilled bosses 3' for. the re
is caused to contract and ‘grip .the peripheral I
?ange 6.
v
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A drilled boss 20' on‘the support I9'receives
a pin 84 which pivotally supports an-operating
handle. 63 for the brake band 65, Figure 10. > The
handle is ‘in the form of a bell crankand the
, oeptionofistub'shafts 4 that carry the gear mem-,___ short arm 65 is connected at 66 tonne end of the
65 bers 5:‘ The arrangement and number of these , band and the other end is anchored ‘at 62 on the
gears is optional and they may be placed at 180" ‘
as disclosed inr'li'ignre‘ior at 120°, the latter ar- “
support.
'
'
To trace the operation of this power take-o?
rangement ‘embodying three of the members. unit, in rotating the drum, I will start‘ with the
drum in the position of Figure '1,' namely, the
The member I is .i‘urther formed with a periph
70 eral ?angeTupon-which are mounted in side by ,loading position or the position which it occupies
side relationithe'friction band members ‘I and 8 during the mixing period. Let it be pointed out
respectively, to be hereinafter mentioned. The
peripheral ?ange 65in this embodiment, extends
inwardly and‘ overlies a circular driven'member
75 8 having gear teeth I 0 cut on the underside of
that'the relative positions of the " parts of the
" ‘power take-oif ‘controls, particularly the small
lever 30, isas shown therein, with this lever lying
in the upper right quadrant of the circle. When
2,107,540
the lever 22 is pressed downwardly to- tighten
the band ‘I, the rotation of the disc I is stopped
3.
dependent from the part 9 is extended into a
handle 46 to be conveniently grasped by the op
and the planetary gears 5 are compelled to rotate erator. The end 3|’ of the. brake band 8 is con
about-their axes in a counter-clockwise direction, nected by the pin 35 to the support member in
assuming that the main ‘gear 2| is rotating in a the zone above the handle as shown in Figure 7.
clockwise direction. As a result, the member 9 Mounted on‘ the handle is a lever 50 pivoted at
Figure 2, will ‘be rotated in a ‘counter-clockwise its midpoint as at 5| and'which is connected on
direction, thus moving the small lever 30 to the the short arm side as at 52 to an adjusting screw
left as well as the mixing drum, and the lever 22 arrangement 53 connected to the other end 34
10 is held down until the drum reaches proper dis
of the band. Obviously, by raising the long arm
charge position. At this time the lever 30 should ‘of the lever 50 the band 8 may be tightened.
be in the vicinity of the lever 22 as shown in This. may be accomplished by pressing down
Figure 3 and stopping of the drum is obtained wardly on the lever 42 which brings the short
through the brake lever 63 and associated band arm- portion 4| to engagement with the pin 53'
6i. It is of importance that the lever 30 be not mounted o'n'the- long arm of the lever 50. This
tripped at this time and that it come to rest
either in engagement with the lever 22 or in such
position that it may be engaged and actuated
by the lever 22. The drum is now in a position
20 to empty and after the contents have been dis
charged therefrom, it is desirable to return the
unloaded receptacle to the position shown in
Figure 1, where it may be recharged for sub
,sequent mixing operations. ‘To so return the
25 drum, the. lever 22 is lifted upwardly by the
operator after ?rst releasing the brake, where
upon the long arm of the lever 30 is lifted and
the band 8 tightened. As the band 8 tightens,
the rotation of the member I is stopped and the
30 planetary gears 5 are locked with respect to the
main shaft gear 2i and the internal gear l0,
Figure 2, whereupon the whole planetary gearing
40
45
50
__
55
10
will effect a reverse rotation of the drum in the
manner described with regard to the device of
Figures 1 to 6, wherein a “kick” is imparted to
the drum for effecting the free rotation thereof
‘to loading position.
On the other hand, by moving the handle 46
downwardly, the end of the lever 50 may be
brought into engagement with the lever 4|, Figure
7, and as pressure is further placed on the handle
46 the lever 50 will pivot on the pin 5| and draw
the ends of the band 8 together and lock the
planetary gear mechanism for clockwise rotation
with the main shaft. Hence, the drum may be
“kicked” in a clockwise direction by operation of
either handle’ 46 or lever '42. The brake of Figure -'
10 may be incorporated. with the assembly and
operated in the manner and for the purposes set
out with respect to the assembly of Figures 1.to 6.
assembly is rotated in a clock-wise direction with
the shaft E. With the parts so locked, the
I have shown in Figure 9 a planetary gearing _
planetary gearing arrangement does not operate .assembly that is essentially the same as that
as such for transmitting motion so that it may be shown in Figure 2 except that it does not incor
said that it is rendered inoperative for this phase porate the braking arrangement of Figure 10.
of transmitting power. To continue, as long as It is my intention to mount the brake directly
the small lever 30 is under the influence of the upon the peripheral ?ange of the member 9 that
lever 22, force will be transmitted to the drum overlies the gear III. In other words, the plan
for rotating it to loading position. This action etary gearing assembly shown in Figure 9 is in 40
imparts a “kick” to the drum and as soon .as the
tended for a “one direction drive”, and all of
lever 38 is carried above the lever 22 the band 8 . the braking. Accordingly, the elements of the
is released and the drum is free to rotate under power take-off- shown herein .will. be identi?ed by
its own momentum to loading position where it is numeral only since they have already been de
stopped through the use of the braking elements scribed in the description of Figures 1 to 6.‘ The
disclosed.’ As soon as the band 8 is released, control instrumentalities for operating this power
the planetary gearing mechanism is restored to unit are of two kinds, one form being shown in
idle position and is not effective to transmit Figure 11 and another form being shown in Fig
power. Obviously, by this arrangement I obtain ures 13 and 14. These control apparatus have
apositive application of force for moving the one feature in common and that is that only a
heavily loaded drum to discharging positiomand single lever is employed for both clutch and brak
I control the momentum so that the drum cannot ing operations. In the disclosure of Figure 11
get out of hand and move past discharging posi
the operation of the brake and clutch is entirely
tion through the power take-off unit as well as manual, whereas in Figures 13 and 14 the opera
the braking instrumentalities.
I propose an~ alternate control arrangement for
the power take-oif'unit of the-type shown in
Figures 1 to 6, and reference may be had to
60 Figures '7 and~8 as disclosing the arrangement.
In this showing the support 24 mounts a lever of
the first class having its fulcrum in the middle on
the pin 40, the lever having a short arm 4i and
a long ‘arm 42. In this instance the lever is pro- v
, tion of the clutch and brake may be made inci
dent to movement of the drum. I will ?rst take
up the control'instrumentalities disclosed in Fig
ure 11.
It will be observed in Figure 9 that the plan 60
etary gear carrying disc I and the driven mem
her 9 are of substantially the same diameter and
each mounts a friction band identi?ed by the
numerals 1a>4and 8a. The band 1a may be
65 vided with ‘a bifurcated part 43 pivotally con
called the clutch band and the band 8a the brake
nected by_ a bolt member 44 to one end of the band, and the operation of these bands is ob- I
brake band ‘I. The other end of the brake band ' tained through a single'lever .14, Figure 11, that
is connected as‘ at 45 to' the support 24. Obvious
is pivotally mounted upon a support 13 that is ‘
ly, by pulling up on the long arm of the lever, ' similar in construction to the support 24 shown
70 the'brake band is contracted to grip the periph
in Figure 6 and is- possessed of the necessary
eral ?ange and accomplish the rotation of the _ apertures (not. shown) for bolting the same to 70
mixingdrum to the left, orin a counter-clock-.
wise direction, as hereinbefore set out. A slightly
different control arrangement is shown for the
76 band 8, and the support ii of Flgure.2 which is
the frame of the machine as disclosed in Figure
1. This bracket- is preferably s-shaped and in
theupper zone is provided withv two inclined ears
that receive» pins ‘I1 and ‘I8 respectively,the pin 75
2,167,540 >
‘ll retaining the looped end of the band 8a and
the pin ‘[9 retaining ,the looped end of the band
‘la. The lever '54 which is pivoted at 15 has a
short arm portion which is preferably bifurcated
and mounts a long pin 16 which receives the
one end of a contraction spring 91 and is con
nected at its other end to the pin 82.‘
In connecting the bands to this assembly, the
connecting rod 88 is sleeved on the rod‘ 86 and
attached by means of a nut to one end of the
band 8a. The other end of this band is anchored
' other looped ends of the bands ‘Ea and 81:. With
. this arrangement,‘ when the lever 14 is moved
on the center-pin 8|. Likewise, a connecting rod
downwardly in the direction of the arrow, the
99' is bolted to one end‘ of the band 1a and con
band 8-1 is contracted, whereas the band ‘la is ‘ nected to the rod 88 at its other end and the
open to thereby apply a braking force on the
other end of this band ‘la is mounted on the
member 9 and hence arrest the rotation of the a center pin 9!.
mixing drum or hold it positively against r0ta~
tion. When the lever 14 is lifted in the direction
of the arrow, the band so is opened and the band
la contracted to stop the rotation oi! the part i,
whereupon the planetary gears 5 are compelled
to rotate about their respective axes and the
between the pin 82 and rod 95. The spring will
driven part 9 is rotated in a counter-clockwise
direction to rotate the drum from loading to un
"on-center” position.
20 loading position.
The brake 8a may be applied v
in
With reference to Figure 12, it will be ob
served that the spring 91 is intended to lie in a
straight line position between the pin 82 and the
rod 95 so as to bias the toggle toward collapsed
position on either side of a centerline drawn
act to collapse the toggle on either side of its
As for the operation, assuming that-the mix 20
to stop the drum and hold it in properv unload-~
ing position. The drum may‘ then be returned
to loading position manually, or, in the event the
nature of the mixing apparatus will allow the
complete rotation of the drum, power may be‘
ing vdrum is in the position shown in Figure l,
spring shown at 16a is merely for the purpose of
stopping the rotation of the gear carrier 5 to
e?'ect the rotation of the driven part 9 and the 30
drum in a counter=c1ockwise direction. In fact,
in readiness to be moved to the left for unload
ing, the lever as, which is preferably in‘ the full
line position shown in Figure 12, is moved up
wardly to the upper dotted line position which 25
again applied through the planetary gear mech
?attens the toggle arrangement and shifts the
anism to rotate the drum. through the remainder plate assembly to the lower dotted. line position
of the ‘360° back to loading position. The small a shown, thus- tightening the clutch hand .‘la and
holding the lever 14 in a horizontal or inopera
tive position.
>
Referring now to Figures 12 to 14 inclusive,
I have shown therein a contr-cl arrangement for
the planetary gearing assembly of Figure 9
when the lever 83 is thrown to its upper dotted
line positien, the toggle is moved to the left of
vits center and the spring is effective to retain
35 which preserves the thought of single lever oper
the toggle in such position to continue the op 35
eration of the planetary gearing assembly. ‘Ro
ation for both clutch and brake and has the addi
tional feature of being operated by the drum of tation of the drum to the left eventually brings
the mixer.‘ The support member for this ar
the abutment member 85 into engagement/with
rangement differs slightly over that of previous the operatingend 84 of the lever 83, whereuponv
40 arrangements and consists in a member 88 which
the end of the lever is sw-ung downwardly until 40
is to be mounted on the frame of the mixing ' such time as the toggle is shifted to the right
machine and which has an angularly disposed . and beyond the center-line between the pins 82
extension 8! drilled at its end for the reception and 95. ‘when the toggle passes over dead-cen
of. a pin 82. The pin 82 mounts the operating ter, the spring is immediately effective to initial
45 member 83, the long arm of which is curved as _ 1;? set the brake since it tends to collapse the" 45
shown in the illustration in the direction of its teggle and move the plate assembly toward the
length and also in the direction of its width to upper dotted line position of Figure 12. ~ Con
provide an offset end 84 lying in the vicinity of tinned, rotation of the drum, which may arise
the mixing drum, see Figure 14. Tins operating from the momentum imparted during the posi- .
50 end of_ the handle is intended to be engaged by
tive rotation, mcves the lever 83 to its lower 50
an abutment member 85 that is formed as a part dotted line position, which sets the brake and
of the mixing drum and projects outwardly from brings the drum to a stop at the proper position
for unloading. .The proper drum position for
' the radial face 86 thereof as shown. The func
tion of this abutment member will .be taken up unloading may vary with mixers of‘ varying type,
'
v55
hereinafter.
'
‘
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ri‘he short arm 81 of the lever °83 forms, with a
lever 88 plvotally connected thereto at 88, altog
‘gle arrangement for operating the clutch mech
. .60
and hence, the positional relation between the
‘abutment/85 and the lever 83 should. best be de- .
' termined in actual practice.
In returning the drum to leading position,
anism through the band la. With reference to it may be ?rst started manually by ‘lifting up '
Figure 14, it will be observed that the toggle ~ on the operating end of the lever 83 which re 60
lever 88 is pivotally secured to a plate member‘ leases the brake and urges the drum about its
axis. The drum may then be pushed by hand
98 which forms one element of- an assembly gen
erally indicated by the reference character N,
to ‘loading position. If desired, the operating
mounted upon .a pin 8| that is in turn mounted lever 83, Figure 14, can be sprung inwardly to
65 upon the support 88 and secured thereto by a‘ disengage the abutment and then lifted to up 65
nut 92. Now this assembly N includes a second per dotted line position of Figerelz to release
the brake and apply the clutch to rotate the
plate 93 which is drilled to receive inspaced re
lation three rods, 84, 85, and 80.» the opposite ends drum through the remainder of the 360° to load
ing position.
.
I
' of vwhich are located in the plate 88. This assem
.70 bly N is intended to rock about the member 8|, 5 _I have described this power take-off unit in 70
which de?nes the axis oi’ rotation, under the the environment of a bitumlnousmixer.
urging of vthe lever 83.- The toggle lever 88 is» before mentioned, these mixers embody a min
connected to the assembly through engagement
driven shaft-for the agitator and the drum axis *
with the rod 85 which is extended beyond ‘the
of rotation is the same as that of the shaft.
_ plate 80. The rod 188 also acts as an anchor for ' However, in some constructions the drum is sup
2,107,540
5
ported directly by the heavy framework and the strumentalities and the means for operating the
. shaft bearings are relieved of the weight of the
drum. The main point to make is that the drum
and shaft are independently rotatable, except
when coupled through the mechanism herein dis
closed.
.
Having thus described my invention, what I
claim as new and desire to secure by Letters Pat
10
ent of the United States, is
1. In combination with a mixing apparatus of
the class described, which includes a frame, a
mixing drum mounted von said frame, a driven
shaft lying on the axis of rotation of said mix
ing drum,’a prime mover/mounted on said frame
15 for rotating said shaft, a power take-off means
same, the friction band is released and the drum
is free to rotate under its own momentum.
'
4. In combination with a rotatable mixing
drum and means for rotating said mixing drum,
a control for'said means which comprises a pair
of friction bands, one of which is rotatable with
respect to the other, operating instrumentalities
for each control band, said operating instrumen
talities including a pair of pivoted levers, one 10
of said pivoted levers being associated with the
movable band and being movable into and out
of a position for engaging with the other lever,
said arrangement being of such a nature that '
the movable band is actuated by the other of said
levers through engagement with the lever of the
movable band and movement of said movable
band effects disengagement of said levers.
5. In a mixing apparatus of the class described
v20
which includes a rotatable mixing drum, a driven
carrier, a gear mounted on said main shaft and , shaft and a prime mover for rotating said shaft,
meshing with said planetary gears, a driven mem
means for coupling said drum to ‘said shaft for
ber mounted on said shaft and having a gear effecting the rotation of said drum which com
meshing with said planetary gears, a sleeve mem
prises a multi-part planetary gear mechanism,
25 ber encompassing said shaft and supporting said one of said parts being rotatable relative to an;
driven member, said driven member being keyed ' other of said parts, means for locking said parts
thereto, a radial part on said sleeve member, in
together for simultaneous rotation, said means
strumentalities for connecting said radial part comprising‘ a friction band supported by one of
to said drum, a support for said sleeve encom
said parts and adapted to be contracted about
39 passing said sleeve between the radial part and the other of said parts and to rotate therewith,
the driven member, and a pair of friction bands, a second friction band encompassing one of said
for coupling said shaft to said drum for selec
tive rotation of said drum, said power take-off
including a-gear carrier mounted on said shaft
and freely rotatable with relation thereto, a
plurality of planetary gears mounted on saidgear
one of which is mounted on said driven member
and the other of which is mounted upon said
gear carrier, and operating instrumentalities
therefor, said ?rst named ‘friction band being
effective to hold the said drum against rotation,
said second named friction band being effective
to hold said gear carrier against rotation and
effect the drive of said drum through said plan
40
etary gearing, driven member and sleeve mem
_ ber.
2. In a'mixing apparatus of the class described,
a rotatable mixing drum, and means for rotat
ing said drum, comprising a multi-part plane
45
tary gear mechanism includingv means for lock
ing the parts of the gear mechanism against
relative movement, said last named means coni
prising a.fric'tion band mounted on and carried
Mom of said parts and releasably ‘connected to
50 another of said ‘parts, control instrumentalities
for said friction band, a second friction band
15
20
25
30
parts and adapted to be contracted therearound,
actuating instrumentalities for each of said
bands, the actuating instrumentalities of the
coupling band being movable therewith and to
ward and away from the other actuating instru
mentalities, said ?rst named actuating instru
mentalities being operated by said second named
actuating instrumentalities and separable upon
actuation, whereby said mixing drum may be 40
connected for rotation in one direction.
‘
6. In combination with a rotatable mixing
drum,'means for rotating said drum, including
a driven part, and means for releasably connect
ing said driven part to said drum, said means
including a friction band coupled for rotation
with said drum and adapted to be contracted
about said driven part for rotation therewith,
actuating instrumentalities for contracting said
friction band, and means for operating said ac
instrumentalities, said actuating instru
for controlling the operation of the planetary’ tuating
mentalities being movable into a position for
- gear mechanism, control instrumentalities for said engagement with said last named means and
second named friction band, the control instru
separable therefrom when actuated thereby, said
50
55 mentalities of said ?rst named friction band be
ing movable into and out of a position for en
arrangement being of such a nature that when 55
the friction band is contracted about said driven
gagement with the control instrumentalities of part the drum is connected for rotation in one
the second named friction band.
direction, and upon separation of the actuating
3. In’ combination with a rotatable mixing instrumentalities and the means for operating
drum, means for rotating said drum, including .the same, the friction band’ is released and the 60
a driven part, and means for releasably con
drum is free to rotate under its own momentum,
necting said driven part to said drum, said means and a friction brake for controlling the rotation
including a. friction band coupled for rotation ~ of said drum.
with said'drum and adapted to be contracted
,7. In a mixing apparatus, a mixing drum, a
65 about said driven‘ part for rotation therewith, ac . driven shaft, means for coupling and uncoupling 65
tuating instrumentalities for contracting said said drum to said shaft, a brake associated with
friction band, and means for operating said ac
said means for controlling the momentum of said
tuating instrumentalities, said actuating instru
drum, and a single lever for operating said brake
mentalities being movable into a position for en'
and said means by the rotation of said drum.
70 gagement with said last named means and sep
8. In- a mixing apparatus, a rotatable mixing 70
arable therefrom when actuated thereby, said ar
drum, a driven shaft, a planetary gear mecha
rangement being of such a nature that when the , nism for coupling and uncoupling said shaft to
friction band is contracted about said driven part said drum, a brake associated with said plane
the drum is connected for rotation in one direc
tary gear mechanism for ‘controlling the momen
75 tion and upon separation of the actuating in-, tum'of said drum, and a single lever for control 76
6
2,107,540
hug the operation of the planetary gear mecha
nism and said brake, said lever being operable
by the-rotation of the drum.‘
9. In a mixing apparatus, the combination with
a rotatable mixing drum and a driven shaft,
means for connecting said drum to said shaft,
control instrumentalities for said means ihclud=~
ing ajfriction band and a lever for operating said
band, a brake for arresting rotation of said drum,
10 including a friction band, instrumentalities for
connecting said last named friction band to said
lever, and means on said drum for engaging said
lever to move the same to operate said friction
bands incident to rotation of said drum.
10. A mixing apparatus which includes a ro
the drum in the opposite direction, said last
mentioned means automatically becoming inop
erative after imparting a momentary initial pos-v
itive rotation to said drum, but allowing said"
latter rotation to continue after the momentum 5
imparting means aforesaid has become inoper
ative.
-
12. In a power take-o? unit, a drive shaft, a
gear ?xed thereto for rotation therewith, a driven
member freely rotatable on and wholly sup
ported by said drive shaft and having an in
ternal ring gear concentrically disposed about
the gear on'the drive shaft but in spaced rela
tion to said latter gear, a planetary gear-carry.
ing member also freely rotatable on said drive 15
tatablemixing'drum having a charging opening
shaft, planetary gears carried thereby and dis
and wherein the drum is movable from one posi
posed intermediate the ring gear of the driven
tion to another to bring the charging opening , member and the fixed gear on the drive shaft and
to a position wherein the contents of the drum having operative driving relation with said gear
20 may be discharged, a driven shaft, means for on the drive shaft and with said driven member, 20
coupling said shaft to said drum for moving the brake means operatively associated with said
same to bring the opening therein into positions planetary gear-carrying member and being ac
for-charging and unloading, an abutment on said
' drum, control instrumentalities for operating said
25 means, including a lever adapted to be engaged
by said abutment, a brake associated with said
means, instrumentaiities connecting said brake
to said lever, said arrangement being of such
tuatable to cause relative movement between said
planetary gear-carrying member and said drive
shaft, whereby power will be transmitted from 25
said drive shaft to said driven member for ro
tating the drivenv member in one direction
through said gear on the drive shaft, said plane
a nature that as the dnm is rotated to bring the _ tary gears, and said ring gear; said driven mem
30 charging opening into a position for emptying,
ber being provided-with a radially extending arm, 30
the lever is engaged by the abutment and actu
ated thereby to render the means inoperative
for coupling the drum to the driven‘ shaft and
for applying the brake.
35
11. ‘In apparatus of the class described, a ro '
in combination with additional brake means op
eratively associated with said planetary gear
tatable mixing drum, means for rotating‘ said
drum in one direction, and means for imparting
momentum to said drum’ effecting rotation of
carrying member, and'instrumentalities carried
by said radially extending arm for controlling
said latter brake to e?ect rotation of the driven 35
member in the opposite direction.
’
ERICK 1-1. momma. v
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