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Патент USA US3090490

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May 21, 1963
w. D. EGNOR ETAL
3,090,480
SAMPLE CAN HANDLING MECHANISM
Filed Oct. 29, 1952
5 Sheets-Sheet 1
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INVENTORS
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May 21, 1963
3,090,480
w. D. EGNOR ETAL
SAMPLE CAN HANDLING MECHANISM
Filed Oct. 29, 1952
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May 21, 1963
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SAMPLE CAN HANDLING MECHANISM
Filed Oct. 29, 1952
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Filed Oct. 29, 1952
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May 21, 1963
w. D‘ EGNOR ETAL
3,090,480
SAMPLE CAN HANDLING MECHANISM
Filed Oct. 29, 1952
5 Sheets-Sheet 5
INVENTORE
5
BY
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United States Patent 0
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Patented May 21, 1963
2
poses. This door is normally kept closed and may be inter
3,090,480
SAMPLE CAN HANDLING MEIJHANISM
locked mechanically with door 13 so that it may be
_
William D. Egnor, Schenectady, and Gordon L. Romme,
Scotia, N.Y., assignors to the United States of America
as represented by the United States Atomic Energy
Commission
Filed Oct. 29, 1952, Ser. No. 317,502
3 Claims. (Cl. 198—209)
This invention relates generally to remotely operated
manipulative devices, and in particular it pertains to a
turntable assembly used in conjunction with the processing
opened by remote control only when door 13 is closed.
Empty containers may be removed from the turntable at
the end of the cycle by any suitable means; for example
an electrically operated crane indicated schematically at
16 (FIG. 3) may be used for this purpose horizontal and
vertical lead screws being employed to move an auto
matic hook 17 into engagement with lugs 19 on container
20 to remove the same from the turntable.
The turntable assembly which forms the ‘subject matter
of radioactive or otherwise toxic material.
In recent years a need has developed for equipment by
means of which toxic materials can be handled in safety
by remote control. In certain operations containers con
of the present invention is shown in detail in FIGS. 4-10
inclusive. With particular reference to FIGS. 4 and 5,
the assembly includes a vertical base member which is
made up of a base plate 21 which may be provided with
a central circular opening (not shown) for ease of assem
taining liquid material must be opened, the contents
stirred, sampled, weighed and removed, after which the
bly. The base plate is provided with suitable holes 22 for
bolting the plate to its supporting surface. Four vertical
emptied container must be washed and removed for
posts 23 are screwed to the base plate and serve as support
survey.
ing members for four side plates 24 which are welded
thereto, forming a box-like vertical turntable supporting
base approximately square in cross section. An annular
bearing plate 25 is held by means of four cap screws 26
to the upper ends of the four vertical posts 23. Depend
ing from the bearing plate by means of cap screws 27 is an
air cylinder 28 of conventional design. Suitable connec
tions for operating the cylinder is provided at 29 and
extend through the enclosing housing to a source of com~
It is an object of this invention to provide a remotely
operated device for moving a container in succession from
station to station and to hold the container in position at
each station while the desired operation is being per
formed.
More speci?cally, it is an object of this invention to
provide an enclosed, remotely operated turntable assembly
for supporting a plurality of containers. The assembly
is capable of both vertical and rotational movement and
pressed air.
Mounted on the upper surface of the bearing plate are
is equipped with means which limit the rotational move
three bearing blocks 30 upon which the turntable rests
ments to predetermined angular increments and means
when in its lowered position as shown in FIG. 5. As
which prevent rotation of the turntable while the con
shown in detail in FIG. 6 each bearing block comprises a
tainer is at a work station.
lower cylindrical plug 31 which ?ts into a circular opening
The invention may be more fully understood by refer
ence to the attached drawings, wherein:
35 in the bearing plate and is held in position by a set screw
32 (FIG. 5). The upper portion 33 of the block is like
FIG. 1 is a schematic elevational drawing showing the
overall relationship of the turntable assembly with its
surrounding hood and associated equipment for opening
the containers, stirring, weighing, and the like.
FIG. 2 is a schematic plan view of the device shown in
FIG. 1.
FIG. 3 is a schematic elevational view showing the
loading mechanism.
FIG. 4 is a plan view of the turntable assembly.
FIG. 5 is a cross section of the turntable assembly
wise generally cylindrical -in shape and is bored at 34 to
receive a shaft 35 upon which a ball bearing 36 is
mounted. The shaft 35 is disposed radially of the bearing
plate (FIG. 4) so that the turntable can be easily rotated
when in its lowered position as shown in FIG. 5.
The turntable disc 37 (FIGS. 4 and 5) and its backing
disc 38 are mounted on the piston 39 of the air cylinder
by means of jam nuts 40. Equally spaced at 20° inter
vals around the periphery of the turntable are eighteen
taken along line V—V——V-~V—V of FIG. 4.
notches '41 (FIG. 4) with which the turntable rotating
FIG. 6 is a cross section of the bearing block shown in
FIG. 5.
mechanism comes into engagement when the turntable
FIG. 7 is an enlarged plan view of the turntable rotat
ing mechanism.
FIG. 8 is an enlarged view of the turntable rotating
pawl;
is moved angularly. Nine large circular openings 42 are
arranged at equally spaced intervals around the turn
table 37. Each opening 42 receives a cradle assembly 43
consist-ing of an annular plate 44 secured by four cap
screws 45 to the turntable. The inner periphery of plate
44 is notched at four points 46 for cooperation with spe
FIG. 9 is a detailed view of the slotted pawl ?nger of
cially designed containers. Four dowels 47 depending
FIG. 8, and
from the plate 44 support a bottom plate 48. A coil spring
FIG. 10 is a side View of the turntable rotating pawl
55 49 covered by a cap 50‘ and anchored by a screw 51 to the
block showing the pawl blade.
bottom plate 48 serves as a means of obtaining a good
The arrangement of the turntable of the present inven
seal at the top of the containers with plate 12, allowing
tion is shown generally in FIG. 1. The turntable assem
for differences in heights of the containers, when the
bly 10 is located entirely within an enclosing protective
turntable is in the raised position (FIG. 1).
housing 11. A portion of the latter is divided by a hori
The turntable rotating mechanism is supported on a
zontal partition 12 into an upper and a lower zone. The 60
pair of brackets 52 which are secured by cap screws 53
former contains a motor driven wrench for opening con
tainers held on the turntable; means for agitating and
adding or withdrawing liquid from the opened containers,
jack for raising and lowering the agitator into the liquid,
a balance for weighing and stations for loading and un
loading containers used in the processing.
to the four vertical posts of the turntable support. A pair
of angles 54 secured to the outer ends of brackets 52 sup
port the turntable rotating assembly. The latter consists
of a base plate ‘55 (FIG. 7) provided with a longitudinal
groove 56.
A bracket 57 is mounted by screws at one end of the
As shown in FIG. 3 an air lock ‘door 13 in the housing
base
plate 55. The bracket is threaded to receive a stop
permits access to the loading hook 14, which operates in
58, a set screw being provided at 59 to hold the stop in
the manner of an ordinary extension ladder. An addi
70 position. Extending axially through the stop S18 is a guide
tional air lock door '15 is provided to cover a circular
rod 6!). One end of this rod is provided with a shouldered
opening in the horizontal partition 12 for loading pur
cap 61 to receive a coil spring 62, whereas the opposite
3,090,480
end of the guide rod is threaded for a hex nut 63. The
opposite end of the coil spring 62 bears against an adjust
ing nut 64 which is pinned to the stop 58 by a set screw 65.
ing 89 and moves links 86 in a clockwise direction (FIGS.
4 and 7) to bring the dowel pin 88 to bear against the
lower portion of the holding pawl arm 80. The notches
may be arranged as desired, however, in the illustrative
embodiment of this invention, they are placed at 20°
intervals so that each stroke of the pawl 71 rotates the
turntable by this amount.
The present turntable is arranged for nine containers.
The rotating mechanism is actuated by an air cylinder
66 of conventional design (FIG. 4) mounted on the base
plate by means of brackets 67, 68 and cap screws 6&9 and
70. Air pressure in cylinder 66 actuates the turntable
rotating pawl 71 the blade 72 of which reciprocates
Any one of the containers may be moved into any of one
in the groove 56 of the base plate.
The pawl 71 is shown in detail in FIGS. 8, 9 and 10. 10 of ?ve working stations which comprise three cutting
stations, one loading station, and one weighing station.
As shown in FIG. 8, the pawl consists of a generally L
When the turntable has ‘been rotated by this amount, by
shaped assembly 73, the longer arm of which is made hol
operation of pawl 71 it is elevated by the piston 39 of
low to accommodate a coiled spring 74. This spring
air cylinder :28. This raises the turntable off the bearing
maintains an outward pressure on pawl ?nger 75, the
latter being slotted at 76 as shown in FIG. 9 to accom 15 blocks ‘30 (FIGS. 5 and 6), the turntable being held
against rotation by means of a pin 91 (FIG. 1) attached
modate a dowel pin 77 which‘ serves to hold the pawl
attached to the partition 12 and arranged to pass through
?nger and spring in position while permitting the former
one of the holes 92 in the turntable (FIGS. 4 and 5).
to move inwardly and outwardly. The shorter arm 78
Upward movement of the turntable continues until the
of the pawl assembly is bored for connection with the
containers come into contact with the cutting stations
piston of the air cylinder 66. The pawl blade 72, which
(FIG. 2). The containers are guided into the cutting
moves in slot 56, is shown in FIG. 10. In operation the
station by the guide 94 (FIG. 1). At this position a
pawl ?nger engages one of the notches 41 in the periph
gasket on the container makes the seal with the partition
ery of the turntable and in moving forward, rotates the '
plates. The container may now be opened by means, for
turntable until the pawl comes to rest against the stop 58
example, of a remotely controlled wrench. When the
and its related adjusting nut, guide and spring.
desired operation is completed the turntable is lowered
A second pawl 79 serves to hold the turntable against
until it again rests upon its bearing blocks. It may then
rotational movement while the rotating pawl 71 is being
be moved by the turntable rotating mechanism to posi
withdrawn. This second pawl consists of an arm 80
tion the container for the next operation. A number of
terminating at its outer end in a pawl pin 81 (FIGS. 4, 5
operations may be performed by auxiliary equipment at
and 7), which is biased by a spring 182 into engagement
the several work stations. These operations may include
with the turntable periphery. The spring ,82 is bent
?lling or siphoning liquids into or out of the container,
around the pawl lever, then coiled around the pawl bear
stirring the contents of the container with a remotely
ing 83 and bent around a pin extending upwardly from
driven agitator or the like.
the base plate 55. ‘The bearing 83 consists of a hollow
‘In the event that it is desired to weigh the container
cylindrical extension at right angles to the pawl arm. The 35
and its contents, a weighing station may be provided as
bearing ?ts over a pin (not shown) projecting upwardly
indicated in FIGS. 1 and 2. This operation requires lift
from the base plate 55, and is secured thereto by a screw
ing the container out of its cradle by means of a weigh
85.
ing hook attached to a conventional beam balance. The
A pair of links 86 are pivotally mounted at 87 on op
posite sides of that end of the pawl arm remote from the 40 lugs 19 on the container engage the weighing hook as the
turntable is raised. The turntable is then lowered, leav
pawl pin 81. A dowel pin 88 connects the two links and
ing the container suspended from the weighing hook.
bears against the pawl arm. The other ends of links 86
When the weighing is completed, the container is disen
support a bearing 89‘, the bearing being arranged to be
gaged from the Weighing hook by raising the turntable
contacted by the pawl blade 72 when the pawl 71 is mov
until it lifts the container beyond the hooking position,
ing forward. Such action causes the links to move to the
thereby automatically opening the weighing books. The
left (FIG. 7) thereby causing the pawl arm to rotate
clockwise to disengage the pawl pin, from the peripheral
disengaged container is then free to be lowered and ro—
tated to the next station. When the cycle of ‘operations is
completed, the container 20 may be removed from the
dowel 88 normally in contact with the pawl arm as shown
turntable by means of unloading hook 17 mounted on
in FIG. 7 and to restore the links to this position once
the pawl blade 72 has broken engagement with the hear 50 crane arm '16 (FIG. 3).
Subsequent to loading the container on the loading
ing '89 in moving to the right of FIG. 7.
hook, the operation of the turntable throughout its cycle
In operation, the loading door 13 is opened and a sealed
can be controlled by an operator working in a safe area.
container is manually loaded on the loading hook (FIG.
3). Door 13 is then closed and ‘air lock door 15 is 55 The present invention provides a turntable which permits
complex operations to be performed as desired. ‘The
opened by remote control. By remote control the con
device has the further advantage of/?exibility in that the
tainer is lowered by a jack through the partition 12 and
operator can move the container to any desired work
into a cradle of the turntable assembly. The loading
station and is notrestricted to a ?xed cycle of operations.
hook is then disengaged from lugs v19 on the container
The movements of the turntable both vertically and ro
and retracted, after which the door 15 is remotely closed.
60 tationally are accurately and surely controlled by the
The turntable is now ready for rotation. This is ac
notches in the turntable. A spring 90‘ serves to keep the
complished by the turntable rotating pawl 71, the spring
loaded ?nger of which drops into notch 41 of the turn
table and moves the latter in a clockwise direction (FIG.
4) under the action of air (pressure in cylinder 66. Move
ment continues until the pawl 71 comes to rest against
elevating and rotating mechanisms while the partitioning
of the housing permits isolation of the highly contami
nated area containing equipment such as the agitator
which contacts the liquid in the container from the load
ing, weighing and turntable zones. In addition to the
the spring loaded stop assembly. At'this point in the
foregoing the turntable assembly is held ?rmly against
cycle the'pin 81 of the turntable holding pawl drops into
rotation when in its raised position so that no danger of
a notch 41 under the pressure of the spring 82 (FIG. 5).
slipping exists at the several work stations.
This holds the turntable against backward movement 70
We claim:
while the rotating pawl 71 is being retracted by its piston.
1. A remotely operable turntable assembly for han
On the next forward movement of the rotating pawl 71,
dling radioactive material comprising a protective housing
‘the pin 81 is automatically released from its notch to
including a horizontal partition subdividing a portion
permit further rotation of the turntable. This release is
thereof into an upper relatively uncontaminated zone
accomplished when the pawl blade 72 engages the bear 75 and a lower relatively contaminated zone; a turntable
3,090,480
disc within the lower zone mounted for rotational and
vertical movement; a series of notches arranged at spaced
intervals around the periphery of the turntable disc; at
least one cradle supported by the turntable disc and ar
ranged to receive a container; remotely operable pneu
matically actuated means consisting of an air cylinder
having a vertically movable piston connected with and
supporting the turntable disc; said piston being construct
relationship with the rotating pawl, and a spring biased
turntable holding pawl having a pin engageable with the
turntable disc to prevent back rotation thereof when the
rotating pawl is being withdrawn from its fully extended
position.
3. A remotely operable turntable assembly for handling
radioactive material comprising a protective housing in
cluding a horizontal partition subdividing a portion there
ed and arranged to raise and lower the turntable disc;
of into an upper relatively uncontaminated zone and a
a dowel pin depending from the horizontal partition and 10 lower relatively contaminated zone; a turntable disc within
engageable with one of a series of openings in the turn—
table disc to prevent rotation thereof when in its raised
the lower zone mounted for rotational and vertical move
ment; a series of notches arranged at equally spaced in
tervals around the periphery of the disc; a plurality of
position; a bearing plate supported below the turntable
disc; a plurality of bearing blocks mounted on said hear
cradles supported by the turntable disc at equally spaced
ing plate and arranged to limit downward movement of 15 intervals and arranged to receive a plurality of containers;
and to rotatably support the turntable in its lowered posi
remotely operable pneumatic means connected with and
tion; and turntable rotating means operable when the
supporting the turntable disc, said means including a pis
turntable is in its lowered position, said rotating means
ton connected with the turntable disc for raising and lower
comprising a pawl engageable with said notches in the
ing the same; a vertical base member supporting the pneu
turntable disc and pneumatically operable means con
nected in driving relationship with the pawl.
2. A remotely operable turntable assembly for handling
radioactive material comprising a protective housing in
cluding a horizontal partition subdividing a portion there
matic means; a dowel pin depending from the horizontal
partition and engageable with one of a series of openings
in the turntable disc to prevent rotation thereof when in
its raised position; a bearing plate supported on the base
member below the turntable disc; a plurality of bearing
of into an upper relatively uncontaminated zone and a 25 blocks mounted on said bearing plate and arranged to
lower relatively contaminated zone; a turntable disc within
the lower zone mounted for rotational and vertical move
ment; a series of notches arranged at spaced intervals
around the periphery of the turntable disc; at least one
cradle supported by the turntable disc and arranged to re
ceive a container; remotely operable pneumatically actu
ated means consisting of an air cylinder having a vertical
limit downward movement of and to rotatably support
the turntable in its lowered position; and turntable rotat—
ing means operable when the turntable is in its lowered
position, said means being mounted on brackets secured to
said base member and comprising a spring loaded rotating
pawl engageable with said notches in the turntable disc,
pneumatically actuated means connected in driving rela~
tionship with the rotating pawl, and a spring biased turn
table holding pawl having a pin engageable with the turn
ly movable piston connected with and supporting the turn~
table disc, said piston being constructed and arranged to
raise and lower the turntable disc; a dowel pin depending 35 table disc to prevent back rotation thereof when the rotat
from the horizontal partition and engageable with one of
ing pawl is being withdrawn from its fully extended
a series of openings in the turntable disc to prevent rota
tion thereof when in its raised position; a bearing plate
supported below the turntable disc; a plurality of bearing
blocks mounted on said bearing plate and arranged to 40
limit downward movement of and to rotatably support the
turntable in its lowered position; and turntable rotating
means operable when the turntable is in its lowered posi_
tion, said rotating means comprising a spring loaded rotat
ing pawl engageable with said notches in the turntable 45
disc, pneumatically actuated means connected in driving
position.
References Cited in the ?le of this patent
UNITED STATES PATENTS
616,737
1,335,221
Schuster _____________ __ Dec. 27, 1898
Christensen __________ __ Mar. 30, 1920
1,386,299
Wright et al ____________ __ Aug. 2, 1921
1,567,126
2,515,086
Erion ________________ __ Dec. 29, 1925
Hess et a1 _____________ __ July 11. 1950
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