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Патент USA US2303186

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‘Nov. 24, 1942.
2,303,186
R. A. WILLIAMS
STACKING MECHANISM
Filed Aug. 9, 1941
3 Sheets—Sheet 1
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Nov. 24, 1942.
R. A. WILLIAMS
2,303,186
STACKING MECHANISM
Filed Aug. 9, 1941
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3 Sheets-Sheet 2
Nov- 24, 1942-
R. A. WILLIAMS
2,303,186
STACKING MECHANISM
Filed Aug. 9, 1941
3 Sheets-Sheet 3
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Patented Nov. 24, 1942
; V. * -~ 52,303,186
~ <..UNITED STATE s] PATENT ' OFFICE
4
> 2.363.136
,"s'rAcxrNG MECHANISM
“ ' ‘Robert Alonzo Williams, Chicago, 11]., assignor to
Ditto,‘ Incorporated, Chicago; 111., a corporation
' vvor West Virginia
. ApplicationlAugust 9, 1941,
13 Claims.
No. 406,209 ‘
' ' (.01. 198-35)‘
designed particularly for use as an extended por
tion of the machine of the patent. It is the ob
ject of thev invention to provide an improved ar
Referring now to the several ?guresof the
drawings, in which corresponding parts are indi
.cated by the .same reference characters, "indi
cates the framework of a unit strip machine hav
ing a shaft 'll rotatably mounted thereon and
driven in clockwise direction in Fig. 1 from any
suitable source of power, said shaft I l in the pre
rangement of cooperating parts by which a series ‘
ofproducts such as the units produced by said .
ferred form' of mechanism as illustrated being
‘given a complete revolution for each, delivery of
This invention relates to counting and unload
ing tables for. unit‘ strips such as are producedby
the machine .of my prior Patent No. 2,238,356,
dated April _15, 1941, the present apparatus being
patented, machinelor of any'apther suitable type
10
may be taken one at a time and stacked into suc
cessive piles of a predetermined number of prod- '
ucts, each on'a table or conveyor, the completed
a unit strip assembly by the, unit strip machine.
At an intermediate point along the shaft‘ H, a
cam I2 is ?xedly mounted thereon adapted to
engage ‘a roller I3 rotatably mounted on a. ‘pivot
’ ally mounted arm I4 so as to give the arm a
Dile being moved out of ' the, way in each instance
to make room forithe'next succeeding pile.
downward stroke upon each revolution of the
shaft. The arm I4 is preferably in the form of a
In the preferred form of the invention, an end
less‘ conveyor‘ is employedfor ror ‘receiving the
channel, being pivoted imposition by means of a
transverse bar I5. At its free end, the arm ll
carries a crossbar it, having links H connected
veyor progressively as the stack is formed. After 20 therewith at their lower ends and connected at
their upper ends with a bar l8 as shown in Fig. 3
the completion of each stack of units, automat- .
successive stacks of unit strips, means being pro
vided for lowering the receiving end of the con
for operating acuttingblade l9.
ically acting means serves to give the conveyor a
substantially to the size of the unit strips being
and 2| of a secondaryframeworkare connected
25 with the framework II), as is best shown in Fig. 2,
stacked so as to provide a clear space on the con
such standards being connected by sidé bars 22
with other standards 23, brace bars 24 being se
cured in oblique position for reinforcing the
structure. Upon the secondary framework, an
endless conveyor 25_is mounted by means of roll
ers 26 and 21, the roller 21 being supported on the
veyor for receiving the next succeeding pile of
units. At substantially the same time when the
conveyor is being advanced, the. receiving end
portion of the conveyor is moved upwardly to its
uppermost receiving position for the'start of the
next pile of units.
A novel form of clutch means
is provided for controlling the action of the
mechanism for raising and advancing the con
veyor.
standards 23 by means of a shaft 28, while the
roller 26 is supported by means of a shaft .29
‘mounted on the upper ends of slide bars 30 rig
idly connected together. by means of a crossbar
3L, As is best shown in Fig. 3, the slide bars 30
are mounted in position .by means of slide bear
. L
It is another object of this invention to improve
machines of this type in sundry details herei‘n
after pointed out. The preferred means by
which the several objects have been attained are
illustrated in the accompanying drawings, in
which-—
,
'
.
At opposite sides of the machine, standards 20
single step of forward movement corresponding
ings 32 carried by the standards 20 and 2|. The
arrangement is such that the end of the conveyor
40 at the left in Figs. 1 and 2 is movable vertically
Fig. 1 is a side face view of an improved ma
with respect to the framework of the machine.
Means is shown for delivering unit strip assem
chine embodying the invention;
Fig. 2 is a longitudinal vertical sectional view
blies from the unit strip machine as theyare
through the machine, taken substantially at the,
‘ produced by the machine. This means comprises
a suction device 33 of any suitable type operated
line 2-2 of Fig. 3;
_
,
Fig. 3 is a transverse vertical sectional view
taken substantially at the line 3-3 of Fig. 1;
I
Fig. 4 is a vertical sectional view taken substan
tially at the line 4-4 of Fig. 3;
Fig. 5 is a sectional view taken substantially at ‘
the line 5-5 of Fig. ‘'1;
through the medium of a lever 34 and a cooper- ,
ating lever or link 35, by which the assemblies are ‘
moved into position above the rear end of the con
veyor one at a time and there released so as to
produce a pile or stack of the assemblies, the rear
end portion of the conveyor (at the left in Fig. 1)
being moved downwardly progressively as the
machine operates for expediting the stacking of
stantially at the line 6-—6 of Fig. 7; and
the assemblies. At predetermined intervals, the
Fig. 7 is a vertical sectional view taken sub- '
55 conveyor is brought back to its normal raised
stantially at the line 1-1 of Fig. 3.
Fig. 6 is a horizontal sectional view taken sub-'
2
position and is given a forward movement to-v
ward the right in Fig. 1 so as to provide room on
the conveyor for the production of the next suc
ceeding pile of the assemblies.
The means for moving the rear end portion of
the conveyor 26 progressively downwardly com
tween the standards 26 and 2| immediately be
low the shaft 66 and directly in front of the shaft
| I. A sprocket pinion 46 fixedly mounted on said
shaft 46 is connected by a sprocket chain 66 with
a sprocket gear 6| loosely, mounted on the shaft
H, as is clearly shown in Fig. 6. This gear 6| is
prises a shaft 66 which is driven by power from
arranged to serve as a member of a‘ clutch by
the shaft'l l. During the normal operation‘ of the
which the gear can be connected with the shaft
machine at the time when a pile of the unit strip
To this end, the gear 6| has a pin 62 slidably
assemblies is being built up on the conveyor 26. 10 mounted therein, a coiled spring 66 being provided
the shaft 66 is driven intermittently by the shaft
bearing on the gear and the pin for applying
H by means of one set of driving connections.
serving at this time to draw the rear, end of the
conveyor 26 downwardly. When a pile of the
yielding pressure on the pin‘for holding its end
portion projected beyond the face of the gear
into position to engage a ‘cooperating clutch
assemblies has been completed, an alternative set 16 member 64 having a notch 66 in its face for re-“'
of driving means is thrown into operation for
ceiving the end of the pin therein. The clutch
driving the shaft 66 from the shaft ||, serving
member 64 is provided with a set-screw 66 for
under these ‘circumstances to return the con
securing the member adjustably in fixed position
veyor by a quick movement to its raised position
on the shaft ||.
.
and to advancethe conveyor with the completed 20 Below the'shaft ||, two pivotally connected
pile of assemblies thereon so as to make room
links 61 and 66 are mounted, the link 61 being
for the production of another stack of assemblies
on the'conveyor.
The means for driving the shaft 66 intermit
tently from the shaft || comprises a link 61 con
nected with the shaft |.| eccentrically thereof by
‘means of a pin 66, the opposite end of the link
being pivotally connected with an arm 66 swing
ingly mounted on the shaft 66, a pawl 46 being
pivotally mounted between the link and the arm
in position to engage a ratchet wheel 4| ?xedly
mounted on the shaft 66. The arrangement is
such that upon each revolution of the shaft II
the pawl 40 gives the shaft 66 a slight rotary
movement in counter clockwise direction in Fig. 1.
Means is provided for connecting the shaft 66
effectively .with the crossbar 6| for moving such
crossbar downwardly. This means comprises
pinions 42 ?xedly mounted on said shaft 66, mesh
ing with gears 4-6 which are rotatably mounted 40
on the standards 26 and 2|. Each of the gears
46 is provided on its inner face with a' pair of
spaced undercut guides 44 between which a slide .
block 46 is slidably mounted, the arrangement
being such that the blocks 46 are held rigidly in
any desired adjusted position along the guides
by meansof set-‘screws 46 which are capable of
being tightened against the faces of the gears 46,
as is clearly shown ‘in Fig. 5. The set-screws 46
pivotally-mounted on the crossbar i6 and the
link 66 being pivotally mounted on the shaft 46.
A spring 66 normally holds the arm 61 in its
raised position, with a roller 66 rotatably mount
ed on the arm engaging a bearing member 6| in
the form of a large roller- carried by the gear 6|.
The connections for the links 61 and ‘66 are loose
enough to permit the arms to move downwardly
to a slight extent against the action of the spring
66 for carrying the arm _61 out of engagement
with the pin 62 so as to permit the pin to bepro
-Jected into operative position by the spring 66.
When the arm 61 is lowered, the pin 62 engages
the notch 66 so as to cause'the gear 6| to rotate
with the clutch member “and the shaft ||.
When thereafter the arm 61 is moved upwardly
again by the spring 66, the head of’the pin 62
engages an obliquely positioned face portion 62
of the arm so as to force the pin lengthwise
against the action of the spring 66 out of engage
ment with the notch 66.
‘The connecting means through which a con
nection is established between the shafts 46 and
66 comprises a pinion 66 ?xedly mounted on the
‘shaft 46 and meshing with a gear 64 which is
rotatably mounted on the shaft 66. When the
shaft 46 is driven by power from the shaft ||
' in clockwise direction in Fig. 7, the gear 64 is
serve also as means for pivotally connecting links 60 driven in counterclockwise direction in said fig
41 with the blocks 46, the links 41 being adjust
ure, serving through a ratchet wheel 66 and a
ably connected at their upper ends with the cross
bar 6| so as to lift the rear end portion of the
conveyor 26.
pawl 66 to cause the shaft 66 to rotate also in
counterclockwise direction, the ratchet wheel be
ing fixedly mounted on the shaft 66 and the pawl
With the shaft 66 being given slight rocking 55 66 being pivotally mounted on the gear 64. A
movements intermittently in counterclockwise di- '
spring 61 holds the pawl 66 normally in engage
rection in Fig. 4 through the medium of the pawl
ment with the ratchet wheel.
46 so as to rotate the gears 46 in clockwise direc
When the shaft 66 is being driven in counter-l
tion in said figure, and with the blocks 46 con
clockwise direction in Fig. 1 from the shaft ||
nected in eccentric position with respect to said 60 through the medium of the ratchet wheel 4|
gears 46, the links 41 are given successive down
Iand the pawl 46, the pawl 66 yields for per
ward movements for moving the rear end portion
mitting such rotation of the shaft 66 without
of the conveyor 26 downwardly intermittently
correspondingly rotating the gear 64. When on
as a pile of unit strip assemblies is built up on
the other hand the shaft 66 is being driven in
the conveyor. The extent of movement of the 05 said counterclockwise direction in Fig. 1 from
conveyor downwardly is controlled by an ad
the shaft || through the medium of the sprocket
justment of the eccentricity of the blocks 46
chain 60 and the pawl 66 as above described.
, through the medium of the set-screws 46, so that
the pawl 40 yields for permitting such rotation
the movement of the conveyor can be regulated
without putting any strain on the link 61 and its
to correspond to the thickness of the successive 70 cooperating parts.
unit strip assemblies.
'
~
The means for driving the shaft 66 by power
from the shaft II by the alternative set of driving
means and for raising and advancing the con
For bringing about an effective operation of I
the clutch comprising the pin 62 in the desired
timed relation, an arm 66 is mounted rigidly
on the arm 66 so as to extend about in front
veyor comprises a shaft 48 rotatably mounted be 76 of the pinion 66 and thence upwardly in rear of
s,sos,1se
.3
the shaft 34, being provided at its upper end with
one at a time for arrangement in piles thereon
_
a pin portion 33 extending longitudinally ‘of the
and adapted to carry each pile forwardly when
shaft 33 into position to be engaged by a pin ‘Ill
extending from the face of the gear 43 at that
completed so as to make way for subsequent piles, '
means forgiving the conveyor successive down
side of the machine. The arrangement is such
that when the pin 10 in the rotation 'of the gear
ward movementsv at intervals for keeping the top -
face of a growing pile of articles at substantially
43 in clockwise direction in Fig. 4 comes into
the same height, and means thrown into opera
tion when the conveyor reaches a predetermined
engagement with the pin 69 the arm 58 is‘ forced
downwardly, serving to move the arm '5'! also
lowered position to give the conveyor a return
downwardly for causing the clutch to be thrown ‘10 movement upwardly. ' ’
into, operation. The gear 43 is then driven
2. In a stacking mechanism, the combination
through the chain 50 and its. cooperating parts " of aconveyor of a length for‘ receiving a plu
including the pawl“ so as to carrythe pin 10
rality of articles in spaced relation along the
quickly out of engagement with the pin 69, where-'- _
upon ‘the arm I‘! quickly moves upwardlyv into
conveyor and movable both horizontally and
vertically in position to receive a series of articles
one at a time for arrangement in piles thereon
position to throw the pin 52 out of operative
engagement with the notch 55 of the clutch
member 54 as soon as said pin 52 engages the
obliquely positioned face, portion 62 of said
arm- 51.
‘
c
As will be readily understood, when the gears
43 are being driven in clockwise direction in Fig. 4
by the clutch mechanism and its cooperating
parts, such gears 43 serve through the links 41
and adapted to carry each pile forwardly when
completed so as 'to make way for subsequent piles,
means for giving the conveyor successive down
20; ward movements at intervals for- keeping the
to raise the vslide bars 30 for carrying the rear
end portion of the conveyor 25 again to its up
permost operative position substantially-as shown
in Fig. 2. At the same time, the shaft 48 rotating
in unison with the shaft“ serves ‘through a
sprocket gear ‘II, a chain 12, and a, sprocketgear
13 to move the top ply of the conveyor belt 25 30
_ a short distance toward the right in Fig. 1 for
moving the pile of unit strip assemblies out of
top? face of a growing pile of articles at substan-'
tially the same height, and means adapted when
the conveyor has been given a predetermined
number of downward movements to give the
conveyor a forward‘ movement horizontally for
providing room for the succeeding pile in back
wardly spaced relation to the ?rst-mentioned
pile and at the same time to return the con
veyor to its uppermost raised position for start—
ing the next pile.
I
i
3. In a stacking mechanism,‘ the combination
of a conveyor of a length’ for receiving a plu
rality of articles in spaced relation along‘ the
conveyor and movable both horizontally and
pile.
.
vertically
in position to receive'a series of articles
35
The arrangement is such that the clutch com—
one at a time for arrangement in piles thereon
prising the pin 52 is thrown into operation in
and adapted to carry each- pile forwardly when
every instance when the pin 10 on the gear'43
completed so as to make way for subsequent piles,
is broughtto its lowermost position. This in
means for giving the conveyor'successive downg
sures that the conveyor is moved downwardly
by intermittent movements through the medium 40 ward movements at intervals as said articles are
the way for permitting the formation of a new
of the link 31 and pawl 40 and is given a quick
upward movement through the medium of the .
clutch as above described. The timing'of the
action of the clutch is thus controlled by the
rotation of the gear 43 which in turn is con—‘ '
trolled by the relative sizes of the pinion 42
and the gear 43. These parts are preferablyhof
such relative size as to insure that the gears
43 shall- be given one complete revolution for
every twenty-?ve revolutions of the shaft ll. so
Since a unit strip assembly is delivered at each
revolution of the shaft II, it will be appreciated
that each of the piles of assemblies will contain
twenty-?ve units, under the conditions speci
?ed. If a different size of gear 43 andpinion 55
42 are employed, so as to change the relative
sizes of these parts and thus change the number
of units in the individual piles, the uniformity
in size and in the number of the units vwill never
theless be maintained from one pile to the next
during normal operation of the machine.
While the form and arrangement of the parts
as-illustrated are preferred, the invention is not
to be limited thereto except as the claims may
be so limited. it being understood that changes
might well be made in the form and arrange
delivered to the conveyor, means for adjusting
the-‘action of said means for moving the con
veyor downwardly so as to make each downward
movement correspond with the thickness of one
of said articles and thus to keep the top face
of the growing pile of articles at‘ substantially
the same height, and means adapted when the
conveyor has been given a predetermined num
ber of downward movements to give the conveyor
upward and forward movements into position to receive the next pile of articles. _
4. In a stacking mechanism, the combination
of a conveyor movable both horizontally and
vertically in position to receivea series of articles
one at a time for arrangement in piles thereon
and adapted to carry each pile forwardly when
completed so as to make way for subsequent piles,
means comprising a rotatably mounted member
adapted at one portion of each revolution to
move the conveyor downwardly and adapted at '
the remaining portion of ‘each revolution to re
turn the conveyor to'itsv raised position, driving
means for giving‘ said member a step by step
movement through theportion of the revolution
by which the conveyor is moved downwardly,
other driving means for giving said member a
ment of the parts without departing from the
comparatively much quicker movement through
spirit of the invention.
the‘portion of the revolution by which the con—
veyor is moved upwardly, and means actuated
I claim:
‘
>
'
y
1. In a stacking mechanism, the combination
of a‘ conveyor of‘ a length for receiving a plu
in timed relation _to the operation of the ma‘? -
chine for shifting periodically from one driving
rality of articles in spaced relation along the
means to the other.
_
'
conveyor and movable both horizontally and ver
5. In a stacking mechanism, the combination
tically in position to receive a series of articles 75 of a conveyor movable both horizontally and
4
vertically in position to receive a series of articles
one at a time for arrangement in piles thereon
and adapted to carry each pile forwardly when
_completed so as to make way for subsequent piles',
means comprising a rotatably ‘mounted member
adapted at one portion of each revolution to
move the conveyor downwardly and adapted at
.the remaining portion of each revolution to re
of the rotatable member by said pawl and ratchet
mechanism and adjustable toward and from the
axis of said rotatable ‘member for varying the
extent of vertical movement of‘ the conveyor
turn .the conveyor to its raised position, means
9. In a stacking mechanism, the combination
of'a conveyor movable vertically in position to
thereby. and other means adapted to act auto
matically when a predetermined number of
articles have been delivered to the conveyor to
return the conveyor to its raised position.
comprising a pawl and ratchet mechanism actu 10
ated by a reciprocatory link for giving said
member a step by step movement through the
portion of the revolution by which the conveyor ‘_
is moved downwardly, and means comprising a -
receive 'a series of articles one at a time for
arrangement in ‘piles thereon and adapted to
carry each pile forwardly when completed so as
to make way for subsequent piles, a member
clutch automatically thrown into operation when 15 rotatabiy mounted on- a transverse axis .below
a pile is completed for moving said member
said conveyor, means comprising a pawl and
through the portion of the revolution by whic
ratchet mechanism for giving said rotatable
the conveyor is moved upwardly.
member a slight rotary movement upon each
6. In a stacking mechanism, the combination
delivery of an article to the conveyor for stack
of a conveyor movable both horizontally and 20 ing, connections between said rotatable member
vertically in position to receive a series of articles '
and said conveyor for giving said conveyor a
one at a time for arrangement in pilesithereon,
slight downward movement upon each actuation
means comprising a rotatably mounted member
of the rotatable member by said pawl and ratchet
adapted at one portion of each revolution to
mechanism and adjustable toward and from the
move the conveyor downwardly and adapted at 25 axis of said ‘rotatable member for varying the
the remaining portion of each revolution to re
extent of vertical movement of the conveyor
turn the conveyor to its raised position and to
thereby, and other means comprising a clutch
give the conveyor a slight movement forwardly
mechanism. actuated automatically when a pre
for providing room for the succeeding pile,
determined number of articles have been stacked
means for giving said member a step by step 30 in a pile for moving the conveyor upwardly to its
movement through the portion of its revolution
raised position and actuated automatically at the
by which the conveyor is moved downwardly, and
end of the upward movement of the conveyor for
means comprising a clutch automatically thrown
opening the clutch.
_
into operation at the completion of each pile in'
10. In a stacking mechanism, the combination
tum for giving said member a comparatively 35 of a conveyor movable vertically in position to
much quicker movement through the portion of
receive a series of articles one at a time for
the revolution by which the conveyor is moved
arrangement in piles thereon and adapted to
upwardly and forwardly.
carry each pile forwardly when completed so as
'7. In a stacking mechanism, the combination
to make way for subsequent piles, a shaft, means
of a frame, two rollers rotatably mounted on said 40 actuated by the rotation of said shaft for moving
frame in horizontally spaced relation to each
said conveyor vertically, a second shaft rotating
other with one of ‘said rollers movable vertically
in timed relation to the delivery of articles to
on the frame, an endless belt conveyor on said
said conveyor, means comprising a pawl and
rollers in position to receive a series of articles
ratchet mechanism for driving said ?rst-named
one at a time for arrangement in piles on the
shaft intermittently by power from said second
conveyor and adapted to carry each pile for;
shaft and arranged for permitting said second
wardly when completed so as to make way for
shaft 'to be driven in the same direction inde
subsequent piles. a member rotatably mounted
pendently of said pawl and ratchet mechanism.
on said frame below said vertically movable 50 and means comprising a clutch and a second
roller, a link pivotally connected between said
pawl and ratchet mechanism for driving said
‘?rst-named shaft alternatively by power from
said second shaft independently of said ?rst
named driving means and arranged for permit
ting said second shaft to be driven by the first
named pawl and ratchet mechanism without un
rotatable member and said movable roller and
adjustable radially with respect to said rotatable
member for controlling its eccentricity with re
spect thereto, means forgiving said rotatable
member a step by step movement through a por
tion of each revolution for moving the conveyor
due strain on said second-named driving means.
downwardly, and means for giving said rotatable
11. In a stacking mechanism, the combination
member a comparatively much quicker move
of a, conveyor movable vertically in position to
ment through the remaining portion of each 60 receive a series of articles one at a time for
revolution-for moving the conveyor upwardly.
arrangement in piles thereon and adapted to
carry each pile forwardly when completed so as
8. In a stacking mechanism, the combination
of a conveyor movable vertically in position to
to make way for subsequent piles, a shaft, means
actuated by the rotation of said shaft for moving
arrangement in piles thereon and adapted to 65 said conveyor vertically, a second shaft rotating
carry each pile forwardly when completed so as
in timed relation sto the delivery 01' articles to
receive a series of articles one at a time for
to make way for subsequent piles, a member
rotatably mounted on a transverse axis below
said conveyor, means comprising a pawl and
said conveyor, means comprising a pawl and
ratchet mechanism\for driving said ?rst-named
shaft intermittently by power from said second
ratchet mechanism for giving said rotatable 70 shaft and arranged for permitting said, second
member a slight rotary movement upon each
delivery of an article to the conveyor for stack
ing, connections between said rotatable member
and said conveyor‘ for giving said conveyor a
slight downward movement upon each actuation
shaft to be driven in the same direction inde
pendently of said pawl and ratchet mechanism,
means comprising a clutch and a second pawl
w
and ratchet mechanism for driving said ?rst
named shaft alternatively by power from said
2,303,186 ,
second shaft independently of said ?rst-named
driving means and arranged for permitting said
second shaft to be driven by the ?rst-named
pawl and ratchet mechanism without ‘ undue
strain on said ?rst-named driving means, and
means actuated in timed relation to the delivery
of articles to said conveyor for throwing said
clutch automatically into and out of operation
for causing the ?rst-named driving means to be
5
mined number of articles have been delivered
to the conveyor for stacking.
13. In a stacking mechanism, the combination
of a ‘conveyor movable vertically in position to
receive a series of articles one at a time for
arrangement in piles thereon and adapted to
carry each pile forwardly when completed so as
to make Way for subsequent piles, a shaft, means
effective for moving the conveyor downwardly
comprising rotatable members at opposite sides
of the machine actuated by the rotation of said
and causing the second-named driving means to
shaft for moving said conveyor vertically, a
be effective for moving the conveyor upwardly.’ , second shaft rotating in timed relation to the
delivery of articles to said conveyor, means com
12. In a stacking mechanism, the combination
prising a pawl and ratchet mechanism for driv- ‘
of a conveyor movable vertically in position to
ing said first-named shaft intermittently by
receive a series of articles one at a time for
power from said second shaft and arranged for
arrangement in piles thereon and adapted to
permitting said second shaft to be driven in the
carry each pile forwardly when completed so as
same direction independently of said pawl and
to make way for subsequent piles, a shaft, means
ratchet mechanism, means comprising a clutch
actuated by the'rotation of said shaft for moving
said conveyor vertically, a second shaft rotating 20 and a second pawl and ratchet mechanism for
driving said ?rst-named shaft alternatively by
in timed relation to the delivery of articles to
power from said second shaft independently of
said conveyor, means comprising a pawl and
ratchet mechanism for driving said ?rst-named
shaft intermittently by power from said second
shaft and arranged for permitting said second
shaft to be driven in the same direction inde-_
said ?rst-named driving means and arranged for
permitting said second shaft to be driven by the
?rst-named pawl and ratchet mechanism with
out undue strain on said second-named driving
pendently of said pawl and ratchet mechanism,
means, means comprising an arm swingingly
means comprising a clutch and a second pawl
mounted adjacent to said clutch mechanism
and ratchet mechanism for driving said ?rst
adapted on a movement of the arm away from
named ‘shaft alternatively by power from said 30 the clutch to throw the clutch into effective oper
second shaft independently of said ?rst-named ‘ ation for moving the conveyor upwardly and
driving means and arranged for permitting said
second shaft to be driven by the ?rst-named
pawl and ratchet mechanism without undue
strain on said ?rst-named driving means, means
comprising an arm swingingly mounted adjacent
to said clutch mechanism adapted on a move
ment of the arm away from the clutch to throw
the clutch into effective operation for moving
adapted on a subsequent movement of the arm
’ toward the clutch to throw the clutch out of
effective operation, a pin extending from the
face of one of said rotatable members, and a
second arm movably mounted in position to be
engaged by said pin at the end of the downward
movement of the conveyor so as to be displaced
thereby and adapted when so displaced to give
the conveyor upwardly and adapted on a move 40 said ?rst-named arm a stroke away from the
clutch for causing the clutch to be thrown into
ment of the arm thereafter toward the clutch
effective ‘operation for moving the conveyor
to. throw the clutch out of effective operation,
upwardly.
and means controlled by the movement of the
ROBERT ALONZO WILLIAMS.v
conveyor downwardly for giving said arm a
stroke away from the clutch when a predeter 45
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