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Патент USA US2872010

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Feb. 3, 1959
R. s. DAVIS
2,872,040
EGG GRADING MACHINE
Filed March 12. 1956
5 Sheets~$heet 1
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Feb. 3, 1959
RS. DAVIS
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2,872,040
EGG GRADING MACHINE
Filed March 12. 1956
5 Sheets-Sheet 2
INVENTOR.
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Feb. 3, '1959
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R. s. DAVIS
2,872,040
EGG GRADING MACHINE
'
Filed March 12. 1956
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EGG GRADING MACHINE
Filed March 12. 1956
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Feb. 3, '1959
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Filed March 12. 1956
R. s; DAVIS
2,872,040
EGG GRADING MACHINE
5 Sheets—Sheet 5
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(
INVENTOB.
I707 61 ?ax/As’
Unite States tent
7
2,872,040
Patented Feb. 3, 1959
2
.
work indicated in its entirety at 1 which supports the»
operating elements of the machine.
At the inlet or supply end of the machine is a delivery
conveyor generally indicated at 2 that advances eggs overv
2,872,040
EGG GRADING MACHINE
_
Roy S. Davis, Otsego, Mich.
- Application March 12, 1956, Serial No. 570,874
17 'Claims.
(Cl. 209-121) -
light holes 3 for candling inspection and onto an eleva
tor 4 for elevation into the reach of elongated parallel
advancing jaws 5. The jaws 5 open and close transverse~
ly to grip and release the eggs and reciprocate longitudi
nally to advance the eggs along a line of scale pans 6.
10 In the example illustrated the pans 6 are arranged in
pairs so that two eggs can be graded in each class simul
taneously. The scale pans are supported by scale mecha
nism to be described in greater detail and function to tilt
and discharge eggs of predetermined weight. The dis
This invention relates to improvements in egg grading 15 charged eggs are received on a transversely moving dis—
vcharge apron or belt 7 having divider rails 8 extending
The principal objects of this invention are:
therealong to segregate the eggs according to the weights
First, to provide a novel form of advancing mecha
as determined by the scales. Obviously the scales ad
nism for smoothly and positively advancing a plurality
jacent to the elevator 4 will be adjusted to the heaviest
of eggs along a line of scale pans for successively weigh 20 grade classi?cation desired so- that eggs that are not
machine.
ing the eggs until the eggs are discharged by the pans
heavy enough to actuate the ?rst scales will remain on the
scale pans to be advanced along successive scales of de
according to their weight.
Second, to provide egg advancing mechanism with jaws
creasing weight adjustment until all eggs have been
that are positively opened and closed with a predeter
classi?ed by weight. An underweight receiving station is
mined gripping pressure on the eggs prior to any lon 25 positioned underneath the jaws beyond the last scale pan
gitudinal transferring motion of the jaws and eggs.
as at 9 to~receive eggs thatare too light to actuate any
Third, to provide actuating mechanism for transverse
of the scale mechanisms.
ly opening and closing and longitudinally reciprocating
article handling jaws which mechanism does not permit
More speci?cally considering the ‘scale mechanism at
tention is directed to Figs. _3 and 5 in which the scale
any slack or lost motion between the transverse opening 30 pans 6 are shown to be supported on scale beams 10 piv
oted at 11 and provided with screw arms 12 with counter
jaws.
‘
and closing and the longitudinal shifting motion of the
Fourth, to provide a novel feed mechanism for deliv
ering eggs to advancing jaws which will ?rst move the
eggs over sources of candling light with a rolling or
rocking motion of the eggs‘ to facilitate candling inspec
tion of the eggs.
Fifth, to provide article advancing mechanism which
will grip, advance and release fragile articles rapidly with
predetermined gripping forces and which has no connec
tion in the mechanism for gripping the articles that may
become loosened with use to change the gripping force
as applied to the articles.
weight nuts 13 adjustably threaded thereon. Extending
along the line of scales is a steady shaft 14 having a plu-.
rality of locking arms 15 projecting therefrom over a por
tion of the beams 10. The steady shaft 14 carries a pair
of operating lever arms 16 with rollers 17 on the upper
end thereof and these rollers 17 are adapted to be en
gaged by a cam 18 to rock the steady shaft and lock the
scale pans in elevated position as the jaws 5 are opened
4.0 and closed. The operation of the cam 18 will be de
Other objects and advantages of the invention will be
apparent from a consideration of the following descrip
tion and claims. The drawings of which there are ?ve
sheets illustrate a highly practical form of the egg grad
ing machine.
'
Fig. 1 is a fragmentary top plan view of the machine
with the egg advancing jaws and mechanism in advanced 50
position.
.
Fig. 2 is a fragmentary side elevational view of the
machine.
Fig. 3 is a fragmentary transverse cross sectional view
taken along the plane of the line 3-—3 in Figs. 1 and 2.
55
scribed in greater detail presently.
The mechanism for supporting and actuating the jaws
5 is illustrated most clearly in Figs. 1 to 5. The frame
work 1 supports a pair of longitudinally extending lat
erally spaced slide bars '19 above the line of scale pans.
Slidably supported on ‘the slide bars is a carriage con
sisting of end crossbars 20 and longitudinally extending
laterally spaced side bars 21 and ?xedly secured to the
side bars 21 are a pair of crossheads 22. The crossheads‘
22 and the crossbars 20 rotatably support a longitudinal
ly extending central rock shaft 23. Pinned to the rock
shaft in opposed thrust engagement with the inner sides
of the crossheads 22 are a pair of gears 24 so that re
ciprocating motion or force applied to the rock shaft will
impart longitudinal reciprocating motion to .the crossheads
Fig. 4 is a fragmentary transverse cross sectional view
and the carriage generally.
taken along the plane of the line 4—4 in Figs. 1 and 2.
Positioned below the gears 24 on the crossheads 22
Fig. 5 is an enlarged fragmentary plan view of the
are a pair of. meshing gears 25 one of which is meshed
drive connections to the egg advancing jaws with parts
with the adjacent gear 24. Thus angular oscillating mo
broken away in cross section.
Fig. 6 is a fragmentary end elevational view of the 60 tion imparted to the rock shaft 23 will be transmitted
through the gears 24 to the meshing gears 25. The gears
delivery conveyor to the egg advancing mechanism partial
25 are mounted on and connected to longitudinally ex
ly broken away in vertical cross section along the line
tending parallel jaw actuating shafts 26. The shafts 26
6—6 in Figs. 2 and 7.
carry
radially projecting jaw support arms 27 that are
Fig. 7 is a fragmentary transverse cross sectional vieW
65 connected to the jaws 5. The jaws 5 are provided with
taken along .the plane of the line 7-7 in Fig. 6.
resilient facings 28 of sponge rubber or the like and with
The egg grading machine of the present invention is
particular reference to Figs. 3 and 4 it will be noted that
designed to rapidly grade eggs by weight and includes a
delivery conveyor which permits candling-inspection of
the facings are provided with inwardly projecting lower
edges 29. Due to the lateral spacing of the actuating
the eggs as they are delivered to the grading mechanism.
shafts-26 the jaw facings 28 and their projecting lower
70
The graded eggs are delivered in separate groups accord
edges 29 close upon each other with a slight upward
ing to weight. ‘The machine includes a suitable frame
motion so as to lift the eggs
or other articles slightly~
2,872,040
3
above the scale pans 6. The jaws open wide as in Fig. 4
so as not to obstruct the discharge of eggs from the
pans 6.
The rock shaft 23 and its carriage project beyond the
line of scale pans to over a chain loop 30. The chain
loop is supported in a horizontal rectangular pattern by
four sprockets 31, the sprockets being cairied by suitable
bearings 32 on a portion of the framework 1. One of the
sprockets 31 is driven continuously by a depending shaft
33. Secured to one link of the chain loop 39 is an up
standing stud having a hall shaped end 343'. ‘ Obviously
the stud 34 will traverse a generally rectangular path as it
rotates with the chain loop 39. Fixedly secured to the
rock shaft 23 above the chain loop 34) is a crank arm 35
having a tubular lower end with a hearing sleeve .36
therein. The bearing sleeve 36 slidably receives the up
per end of the connecting rod 37 and the lower end of
the connecting rod 37 carries a socket connection 33
forming a universal joint connection with the stud 34.
As the chain loop 39 is rotated in a counter clockwise
direction as indicated in Pig. 5 the crank arm 35 and
connecting rod 37 will be given a counter clockwise
rotation across the outer end of the'chain loop removed
from the scale pans and this motion will result in opening
motion of the jaws 5. Retracting motion of the stud 34
along the right hand side of the chain loop moves the
rock shaft 23 and the entire carriage in a retracting
motion with the jaws open until the inner ends of the
jaws are positioned over the elevator 4. The stud 34 and
4
which intermittently engages and drives the star wheel
56. The star wheel 56 is on a shaft 57 with the gear
58 that drives the gear 59 on the shaft 60 that intermit
tently drives the delivery conveyor chains 39. The shaft
54 also carries a gear that continuously drives the crank
gear 62. A crank pin 63 on the crank gear 62 is con
nected by the connecting rod 64 to a crank arm 65 on
the rock shaft 47. This oscillates the cam 46 to operate
the elevator in timed relation to the conveyor.
In order to facilitate candling inspection of the eggs
being delivered to the elevator and the grading mechanism
those portions of the frame 1 which support the chain
loops 39 are provided with rails 66 (see Fig. 7) supporting
rollers 67 on the ends of two shafts 68. The shafts 68
support three rails 69 that project upwardly and engage
and support cylindrical rims 70 on the ?ight bars 41.
The rails 69 coact with the rims 70 to support the ?ight
bars slightly above the level of the chain supporting
rails 40 for a short distance. A link 71 connects the
center support rail 69 to the previously mentioned lever
arm 65 so that the rails 69 are oscillated longitudinally
by rotation of the crank gear 62. Thus the eggs are rolled
or oscillated back and forth while being advanced by
the chains 39 over the support rails 69.
Positioned between the support rails 69 and below
the ?ight bars 41 are neon light tubes 72 enclosed in
housings 73 and supported by wooden crossbars 74. The
removable covers 75 of the housings are provided with
spaced light ports 76 directed upwardly to the under sides
crank arm 35 then move to the left across the inner end 30 of the eggs on the supply conveyor.
of the chain loop to close the jaws on eggs supported on
the elevator and any eggs remaining ungraded on the
scale pans. The stud 34 and crank arm 35 then move
outwardly or downwardly as appears in Fig. 5 along the
left reach of the chain loop to advance the carriage and
the closed jaws. It will be noted that the transverse
It has been found
that oscillating rolling motion of the eggs over the light
ports permits more rapid and accurate candling inspection
of the eggs than would the steady passage of eggs over
an upper light. After passing the candling light and the
support rails 69 the chain loops 39 are returned to the ‘
support rails 40 to continue advancing the ?ight bars
and eggs past the elevator 4.
Having thus described the invention, what is claimed
as new and is desired to be secured by Letters Patent is:
l. in an egg grading machine having a plurality of
40
different portions of the chain loop 30.
weighing scales with aligned scale pans arranged in pairs '
The previously mentioned locking earns 18 are carried
to weigh and discharge eggs of different weights, means
by one of the side bars 21 and reciprocate with the car
opening and closing of the jaws is entirely independent
of the longitudinal motion of the jaws because the two
motions are created by movement of the stud 34 along
riage and the jaws. The rollers 17 and rocking levers
16 are positioned longitudinally on the steady shaft 14
to be engaged by the cam 13 at the ends of the longi
tudinal motion of the carriage and the jaws. Thus the
scale pans 6 will be locked in raised position during the
intervals in which the jaws are opening or closing over
the scale pans but will be free to operate in weighing
for advancing eggs in pairs along said line of pans com‘?
prising a frame supporting said scales and including a_
pair of slide bars extending longitudinally in laterally
spaced relation above the line of said pans, a carriage
including cross bars slidably supported on said slide
bars, longitudinal side bars on said carriage with cross
heads extending therebetween, a longitudinal rock shaft .'
action while the jaws are retracting in open position. 50 rotatably mounted in said cross heads and having gears
secured to the shaft in opposed thrust engagement with
The advancing mechanism can thus operate quite rapidly
the cross heads, a pair of jaw operating shafts rotatably
as there is little shock incident to the reversing motion of
mounted in said cross heads, gears on the ends of said
the carriage and jaws and since the closing pressure of
operating shafts meshed with each other, the gears on
the jaws is at all times ?xed by the constant lateral throw
one operating shaft being meshed with the gears on said
of the crank arm 35 and stud 34.
rock shaft, jaw arms projecting from said operating shafts,
The details of the drive connections and delivery con
elongated jaws with opposed cushioned faces carried on
veyor are most clearly shown in Figs. 1, 2, 6 and 7. The
said jaw arms over said pans for lateral opening‘ and
delivery conveyor 2 consists of a pair of chain loops 39
closing motion with respect to eggs on the pans, sprockets
supported upon angular rails 40 (see Fig. 7) and driven
by suitable sprockets not illustrated. Extending between 60 mounted on said frame and supporting a chain in a ho-ri—
zontal rectangular loop at one end of said line of pans,
the chain loops 39 are ?ight bars 41 having hour-glass
a stud carried by said chain loop, a crank arm ?xedly se
shapes to receive the eggs between the ?ight bars. Eggs
cured to said rock shaft, a connecting rod telescopically
that are small enough to pass between adjacent ?ight bars
engaged with said crank arm and having a universal
are supported upon parallel slide wires 42.
The elevator 4 consists of upright plungers 43 adapted 65 joint connection with said stud, means connected to ro
tate said chain loop, said jaws projecting-oppositely from
to reciprocate between the ?ight bars and connected on
said chain loop beyond said line of pans in the retracted
their lower ends to a long lever beam 44, the lever beam
position of said carriage to over a supply station, means
being pivotally supported at 45 (see Fig. 6‘). The lever
for delivering eggs in pairs to said supply station including
beam 44 is oscillated up and down by a cam 46 carried
a conveyor having hour glass shaped ?ights, means con
‘by the rock shaft 47. The motor 48 shown in Fig. 2
nected to advance said conveyor in timed relation to said
drives gearing in a gear box 49 to drive the previously
chain loop, an elevator reciprocable vertically between
mentioned shaft 33 to the chain loop 30 and also to drive
said ?ights at said supply station, means connected to .
a chain 50 to the lay shaft 51. A chain 52 drives the
actuate
said elevator in timed relation to said chain loop,
apron 7 from the lay shaft and a chain 53 drives the cross
candling lights positioned under a reach of said con
shaft 54. The cross shaft 54 carries a crank pin 55
2,872,040
5
veyor, support rails supporting said ?ights independently
of said conveyor over said lights, and means connected
to oscillate said support rails to rotate said ?ights and
eggs supported thereby over said lights.
‘
vancing eggs'alohg said line of pans comprising a frame
supporting said scales and including a slide extending
longitudinally along the line of said pans, a carriage slid
ably supported on said slide, cross members on said car
2. In an egg grading machine having a plurality of 5' riage, a longitudinal rock shaft rotatably mounted in
weighing scales with aligned scale pans arranged to weigh
said cross members and having opposed thrust engage
and discharge eggs of different weights, means for ad
ment with the carriage, gears, on said rock shaft, a pair of
vancing eggs along said line of pans comprising a frame
jaw operating shafts rotatably mounted in said cross
supporting said scales and including a pair of slide bars
members, gears von the ends of said operating shafts
extending longitudinally in laterally spaced relation above 10' meshed with each other, the gears on one operating shaft
the line of said pans, a carriage including cross bars
being meshed with the gears on said rock shaft, jaw arms
slidably supported on said slide bars, longitudinal side
bars on said carriage with cross heads extending there
between, a longitudinal rock shaft rotatably mounted
in said cross heads and having gears secured to the shaft
in opposed thrust engagement with the cross heads, a
pair of jaw operating shafts rotatably mounted in said
cross heads, gears on the ends of said operating shafts
meshed with each other, the gears on one operating
shaft being meshed with the gears on said rock shaft,
jaw arms projecting from said operating shafts, elongated
jaws with opposed cushioned faces carried on said jaw
projecting from said operating shafts, elongated jaws with
opposed cushioned faces carried on said jaw arms over
‘said pans for lateral opening and closing motion with re
15: spect to eggs on the pans, means supporting a horizontal
rectangularly looped ?exible drive member atone end of
said line of pans, a stud carried by said looped‘member, a
crank arm ?xedly secured to said rock shaft, ‘a connecting
rod axially slidably engaged with said crank arm and
20‘3 having a universal joint connection with said stud, means
connected to rotate said looped member, said jaws pro
jecting oppositely from said loop beyond said line of pans
arms over said pans for lateral opening and closing mo
in the retracted position of said carriage to over a'supply
tion with respect to eggs on the pans, sprockets mounted
station, and means for delivering eggs to said supply sta
on said frame and supporting a chain in a’ horizontal 25 7 tion.
rectangular loop at one end of said line of pans, a stud
5. In an egg grading machine having a plurality ‘of
carried by said chain loop, a crank arm ?xedly secured
weighing scales with aligned scale pans arranged to weigh
to said rock shaft, a connecting rod telescopically en—‘
and discharge eggs of different weights, means for advanc
gaged with said crank arm and having a universal joint
ing eggs in pairs along said line of pans comprising a
connection with said stud, means connected to rotate 30 5 frame supporting said scales and including a slide extend
said chain loop, said jaws projecting oppositely from said
chain loop beyond said line of pans in the retracted
position of said carriage to over a supply station, and
means for delivering eggs to said supply station.
ing longitudinally along the line of said'pans, a carriage
slidably supported on said slide, cross members on said
carriage, a longitudinal rock shaft rotatably mounted in
‘said cross members and having opposed thrust engage
3. In an egg grading machine having a plurality of 35 ment with the carriage, a gear on said rock shaft, a pair
of jaw operating shafts rotatably mounted in said cross
and discharge eggs of dilferent weights, means for ad
members, gears on said operating shafts meshed with
vancing eggs along said line of pans comprising a frame
each other, the gear on one operating shaft being meshed
supporting said scales and including a slide extending
with the gear on said rock shaft, jaw arms projecting
Weighing scales with aligned scale pans arranged to weigh
longitudinally along the line of said pans, a carriage ‘10 from said operating shafts, elongated jaws with opposed
slidably supported on said slide, cross members on said
carriage, a longitudinal rock shaft rotatably mounted in
cushioned faces carried on said jaw arms over said pans
for lateral opening and closing motion with respect to
said cross members and having opposed thrust engage
eggs on thepans, means supporting a horizontal rec
ment with the carriage, gears on said rock shaft, a pair
tangularly looped ?exible drive member at one end of
of jaw operating shafts rotatably mounted in said cross 45 said line of pans, a stud carried by said looped member,
members, gears on the ends of said operating shafts
a crank arm ?xedly secured to said rock shaft, a con
meshed with each other, the gears on one operating
necting rod axially slidably engaged with said crank arm
shaft being meshed with the gears on said rock shaft, jaw
and having a universal joint connection with said stud,
arms projecting from said operating shafts, elongated
means connected to rotate said looped member, said jaws
jaws with opposed cushioned faces carried on said jaw 50 projecting oppositely from said looped drive member
arms over said pans for lateral opening and closing
beyond said line of pans in the retracted position of said
motion with respect to eggs on the pans, means sup
porting a horizontal rectangularly looped ?exible drive
member at one end of said line of pans, a stud carried
carriage to over a supply station, means to lock said
scale pans in raised inoperative position and including
a swingable operating member, cam means reciprocable
by said looped member, a crank arm ?xedly secured to 55 with said carriage and engageable with said operating
said rock shaft, a connecting ‘rod axially slida'bly'engaged
with said crank arm and having a universal joint con-i
nection-with said stud, means connected to rotate said
looped member, said jaws projecting oppositely from
member while said carriage is at the ends of its longitu
dinal travel, means for delivering eggs to said supply sta
tion including a conveyor having ?ights, means con
nected to advance said conveyor in timed relation to said
said loop beyond said line of pans in ‘the retracted posi 60 loop, an elevator reciprocable vertically between said
tion of said carriage to over a supply station, means for
‘delivering eggs to said supply station including a con
veyor having ?ights, means connected to advance said
conveyor in timed relation to said loop, an elevator
?ights at said supply station, means connected to actu
ate said elevator in timed relation to said loop, candling
lights positioned under a reach of said conveyor, support
rails supporting said ?ights independently of said con
reciprocable vertically between said ?ights at said sup 65 veyor over said lights, and means connected to oscillate
ply station, means connected to actuate said elevator in
said support rails to rotate said flights and eggs supported
thereby over said lights.
under a reach of said conveyor, support rails supporting
6. In an egg grading machine having a plurality of
said ?ights independently of said conveyor over said
weighing scales with aligned scale pans arranged to
lights, and means connected to oscillate said support 79 weigh and discharge eggs of di?erent weights, means for
rails _to rotate said ?ights and eggs supported thereby
advancing eggs in pairs along said line of pans compris
over saidvlights.
ing a frame supporting said scales and including a slide
4.v In‘ an egg‘ grading machine having a plurality of
extending longitudinally along the line of said pans, a
weighinglscales with aligned scale pans arranged to weigh
carriage slidably supported on said slide, cross members
and discharge eggs of different weights, means for ad 75 on said carriage, a longitudinal rock shaft rotatably
timed ‘relation to said loop, candling lights positioned
2,872,040
7
3
mounted in said cross members and having opposed
operating shafts meshed with each other, the gear on
one operating shaft being meshed with the gear on
said rock shaft, jaw arms projecting from said oper
thrust engagement with the carriage, a gear on said rock
shaft, a pair of jaw operating shafts rotatably mounted
ating shafts, elongated jaws with opposed cushioned
in said cross members, gears on said operating shafts
meshed with each other, the gear on one operating shaft
being meshed with the gear on said rock shaft, jaw arms
lateral opening and closing motion with respect to arti
projecting from said operating shafts, elongated jaws with
cles on the pans, means supporting a horizontal rec
faces carried on said jaw arms over said pans for
tangularly looped ?exible drive member at one end of
said line'of pans, a stud carried by said looped mem
said pans for lateral opening and closing motion with
respect to eggs on the pans, means supporting a horizon 10 ber, a crank arm ?xedly secured to said rock shaft, a
connecting rod axially slidably engaged with said
tal rectangularly looped ?exible drive member at one
crank arm and havinga universal joint connection with
end of said line of pans, a stud carried by said looped
said stud, means connected to rotate said loop, said
member, a crank arm ?xedly secured to said rock shaft,
jaws projecting oppositely from said loop beyond said
a connecting rod axially slidably engaged with said crank '
arm and having a universal joint connection with said 15' line of pans in the retracted position of said carriage
to over a supply station, means arranged to lock said
stud, means connected to rotate said looped member, said
scale pans in operative position and including a mov
jaws projecting oppositely from said looped drive mem
opposed cushioned faces carried on said jaw arms over
able actuating member, means carried by said carriage
and reciprocable therewith to engage and actuate said
actuating member while said carriage is at the ends of
its longitudinal travel, and means for delivering articles
to said supply station.
9, In a article grading machine having a plurality of
ber beyond said line of pans in the retracted position
of said carriage to over a supply station, means to lock
said scale pans in inoperative position and including a
swingable operating member, cam means reciprocable
with said carriage and engageable with said operating
member while said carriage is at the ends of its longitu
dinal travel, and means for delivering eggs to said supply
station.
7. In an article grading machine having a plurality
of weighing scales with alined scale pans arranged to
weigh and discharge articles of different weights, means
weighing scales with aligned scale pans arranged to
25 weigh and discharge articles of different Weights, means
for advancing articles along said line of pans com
prising a frame supporting said scales and including
a slide extending longitudinally along the line of said
pans, a carriage slidably supported on said slide, a
ing a frame supporting said scales and including a slide 30 longitudinal rock shaft rotatably mounted in said car
riage and secured in opposed thrust engagement with
extending longitudinally along the line of said pans, a
the carriage, a gear on said rock shaft, 21 pair of jaw
carriage slidably supported on said slide bars, cross
operating shafts rotatably mounted in said carriage,
members on said carriage, a longitudinal rock shaft
gears on said operating shafts meshed with each other,
rotatably mounted in said cross members and having
opposed thrust engagement with the carriage, a gear 35 the gear on one operating shaft being meshed with the
gear on said rock shaft, jaw arms projecting from
on said rock shaft, a pair of jaw operating shafts ro
said operating shafts, elongated jaws with opposed faces
tatably mounted in said cross members, gears on said
carried on said jaw arms over said pans for lateral
operating shafts meshed with each other, the gear on
opening and closing motion with respect to articles on
one operating shaft being meshed with the gear on
said rock shaft, jaw arms projecting from said oper 40 the pans, means supporting a horizontal rectangularly
looped ?exible drive member at one end of said line
ating shafts, elongated jaws with opposed cushioned
of pans, a stud carried by said looped member, a crank
faces carried on said jaw arms over said pans for later
arm ?xedly secured to said rock shaft, a connecting
al opening and closing motion with respect to articles
rod axially slidably engaged with said crank arm and
on the pans, means supporting a horizontal rectangu
larly looped ?exible drive member at one end of said 45 having a universal joint connection with said stud,
means connected to rotate said loop, said jaws project
line of pans, a stud carried by said looped member, a
for advancing articles along said line of pans compris
crank arm ?xedly secured to said rock shaft a cony
ing oppositely from said loop beyond said line of pans
in the retracted position of said carriage to over a
supply station, means arranged to lock said scale pans
arm and having a universal joint connection with said
stud, means connected to rotate‘said looped drive mem 50 in operative position and including a movable actuating
necting rod axially slidably engaged with said crank
member, means carried by said carriage and recipro
ber, said jaws projecting oppositely from said loop be
said scale pans in inoperative position and including an
cable therewith to engage and actuate said actuating
member while said carriage is at one end of its longi
tudinal travel, and means for delivering articles to said
operating member, cam means reciprocable with said 55
supply station. _
yond said line of pans in the retracted position of
said carriage to over a supply station, means to lock
carriage and engageable with said operating member
10. In an article grading machine having a plurality of
While said carriage is at the ends of its longitudinal
travel, and means for delivering articles to said supply
grading devices with aligned pans arranged to grade and
said looped drive member, an elevator reciprocable
vertically between said flights at said supply station,
longitudinally along the line of said pans, a carriage slid
ably supported on said slide, a longitudinal rock shaft
rotatably mounted in said carriage and secured in opposed
discharge articles of different grades, means for advanc
ing articles along said line of pans comprising a frame
station including a conveyor having ?ights, means con
nected to advance said conveyor in timed relation to 60 supporting said devices and including a slide extending
and means connected to actuate said elevator in timed
'
thrust engagement with the carriage, a gear on said rock
for advancing articles along said line of pans compris
ingly engaged with one of said operating shafts, jaw
arms projecting from said operating shafts, elongated
relation to said looped drive member.
S. In an article grading machine having a plurality 65 shaft, a pair of jaw operating shafts rotatably mounted
on said carriage, gears on said operating shafts meshed
of Weighing scales with aligned scale pans arranged to
with each other, the gears on said rock shaft being driv
weigh and discharge articles of different weights, means
ing a frame supporting said scales and including a slide
extending longitudinally along the line of said pans,
a carriage slidably supported on said slide, a longitu
dinal rock shaft rotatably mounted in said carriage and
secured in opposed thrust engagement with the car
riage, a gear on said rock shaft, a pair of jaw operating
shafts rotatably mounted in said carriage, gears on said 75
jaws with opposed faces carried on said jaw arms over
said pans for lateral opening and closing motion with
respect to articles on the pans, means supporting a hori
zontal rectangularly looped ?exible drive member at one
end of said line of pans, a stud carried by said looped
member, a crank arm ?xedly secured to said rock shaft.
2,872,040
a connecting rod axially slidably engaged with said crank
on said carriage, driven rock shafts mounted on said
carriage and on which said jaws are mounted, said driven
arm and having a universal joint connection with said’
stud, means connected to rotate said loop, said jaws pro
11. In an article grading machine having a plurality of
rock shafts being geared to said driving rock shaft to be
simultaneously opened and closed, a series of aligned re
ceivers disposed in alignment with said jaws to receive
work translated by the jaws, and means for reciprocating
said carriage and actuating said driving rock shaft com
prising sprockets ‘disposed in a rectangular group beyond
grading devices with aligned pans arranged to grade and
discharge articles of different grades, means for advancing
the end of the stroke of said jaws, driving means for one
of said sprockets, a chain trained upon said sprockets
articles along said line of pans comprising a frame sup
and provided with a knuckle member, a crank arm- on
porting said devices and including a slide extending longi
tudinally along the line of said pans, a carriage slidably
engaged with said arm and having a universal joint en
jecting oppositely from said loop beyond said line of pans
in the retracted position of said carriage to over a sup
ply station, and means for delivering articles to said sup-.
ply station.
said driving rock shaft, and a connecting rod telescopingly
supported on said slide, a longitudinal rock shaft rotatably
mounted in said carriage and secured in opposed thrust
gagement with said knuckle member.
engagement with the carriage, a gear on said rock shaft,
ciprocatingly mounted carriage, a support for a plurality
a pair ‘of jaw operating shafts rotatably mounted on said
carriage, gears on said operating shafts meshed with each
other, the gears on said rock shaft being drivingly en
gaged with one of said operating shafts, jaw arms pro
of objects to be graded, coacting elongated jaws having
opposed work gripping resilient faces, a driving rock shaft
14-. In a grading machine, the combination of a re
mounted on said carriage, driven rock shafts mounted on
said carriage and onwhich said jaws are mounted, said
driven rock shafts being geared to said driving rock shaft
to simultaneously open and close said jaws, a series of
aligned receivers disposed in alignment with said jaws .
jecting from said operating shafts, elongated jaws with op
posed faces carried on said jaw arms over said pans for
lateral opening and closing motion with respect to ar
ticles on the pans, means supporting a horizontal rectan
to receive work translated by the jaws, and means for
gularly looped ?exible drive member at one end of said 25 reciprocating said carriage and actuating said driving
line of pans, a stud carried by said looped member, a
rock shaft comprising sprockets disposed in a rectangular
crank arm ?xedly secured to said rock shaft, means form
group and a sprocket chain coacting therewith, and a
ing a driving connection between said stud and said crank
crank arm on said driving rock shaft connected to said
arm to angularly rock said arm and rock shaft and recip
chain whereby the carriage is reciprocated and the rock
rocate said crank arm and carriage as said stud travels 30 shaft actuated at the ends of the carriage stroke.
around said loop, means connected to rotate said loop,
15. The combination of a reciprocatingly mounted car
said jaws projecting oppositely from said loop beyond
riage, a driving rock shaft mounted on said carriage, and
said line of pans in the retracted position of said carriage
means for reciprocating said carriage and actuating said
to over a supply station, and means for delivering articles
driving rock shaft comprising sprockets disposed in a rec
35 tangular group beyond the end of ‘the forward. stroke of
to said supply station.
12. In an article grading machine having a plurality of
said jaws, a chain trained upon said sprockets and pro
grading devices with aligned pans arranged to grade and
vided with a knuckle member, a crank arm on said
discharge articles of different grades, means for advanc
driving rock shaft, and a connecting rod telescopingly
ing articles along said line of pans comprising a frame
engaged with said arm and having a universal joint con
supporting said devices and including a slide extending 40 nection with said knuckle member.
longitudinally along the line of said pans, a carriage
16. The combination of a reciprocatingly mounted car
slidably supported on said slide, a longitudinal rock shaft
riage, a driving rock shaft mounted on said carriage, and
rotatably mounted in said carriage and secured in opposed
thrust engagement with the carriage, a gear on said rock
shaft, a pair of jaw operating shafts rotatably mounted
means for reciprocating said carriage and actuating said
45
on said carriage, gears on said operating shafts meshed
‘ with each other, the gears on said rock shaft being
driving rock shaft comprising sprockets disposed in a rec
tangular group and a sprocket chain coacting therewith,
a crank arm on said driving rock shaft connected to said
chain whereby the carriage is reciprocated and the rock
drivingly engaged with one of said operating shafts, jaw
shaft actuated at the ends of the stroke of the carriage.
arms projecting from said operating shafts, elongated jaws 50
17. The combination of, a reciprocatingly mounted
with opposed faces carried on said jaw arms ‘over said
carriage, a driving rock shaft mounted on said carriage,
pans for lateral opening and closing motion with respect
and means for reciprocating said carriage and actuating
rectangularly looped ?exible drive member at one end
said driving rock shaft at the ends of the stroke of the
carriage comprising a driving member traveling in a
of said line of pans, a crank arm ?xedly secured to said
55 rectangular path with spaced reaches of its travel parallel
to articles 011 the pans, means supporting a horizontal
rock shaft, means'forming a driving connection between
a point on said drive member and said crank arm to
to the path of travel of the carriage and other spaced
reaches transverse to the path of travel of the carriage, a
angularly rock said arm and rock shaft and reciprocate
said crank arm and carriage as said point travels around
said loop, means connected to rotate said loop, said jaws
telescopingly engaged with said crank arm and having a
crank arm on said driving rock shaft and a connecting rod
universal joint connection with said driving member.
projecting oppositely from said loop beyond said line of
pans in the retracted position of said carriage to over a
References Cited in the ?le of this patent
supply station, and means for delivering articles to said
UNITED STATES PATENTS
supply station.
13. In a grading machine, the combination of a recipro
catingly mounted carriage, a support for a plurality of 65
objects to be graded, coacting elongated jaws having op
posed work gripping faces, a driving rock shaft mounted
1,577,627
1,959,237
2,687,802
2,783,883
Webster _____________ __ Mar. 23,
Hiscock _____________ __ May 15,
Davis _______________ __ Aug. 31,
Davis ________________ __ Mar. 5,
1926
1934
1954
1957
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