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Патент USA US3063686

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Nov. 13, 1962
3,063,676
M. E. ROBINSON
AIRPORT FORM PIN FULLER
Filed April 22. 1960
5 Sheets-Sheet 1
,
INVENTOR.
MMImce E. koliysalv
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Nov. 13, ‘1962
‘ 3,063,676‘
M. E. ROBINSON
AIRPORT FORM PIN FULLER
Filed April‘ 22, 1960
_ 5 Sheets-Sheet 2
INVENZ'OR.
MAM/‘cc E. Kali/V800‘
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BY
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Nov. 13, 1962
M. E. ROBINSON
3,063,676
AIRPORT FORM PIN FULLER
Filed April 22, 1960
5 Sheets-Sheet 3
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INVENTOR.
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BY
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Nov. 13, 1962
3,063,676
M. E. ROBINSON
AIRPORT FORM PIN FULLER
Filed April 22, 1960
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5 Sheets-Sheet 4
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Nov. 13, 1962
3,063,676
M. E. ROBINSON _' '
AIRPORT FORM PIN FULLER
Filed April 22, 1960 _
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INVENTQR.
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,4 77-04419:
United States Patent O?lice
1
2
tion will be apparent from the following detailed descrip
tion and appended claims, reference being had to the ac
companying drawings forming a part of the speci?cation
wherein like reference numerals designate corresponding
3,063,676
AERPGRT FSRM PW FULLER
3,063,676
Patented Nov. 13, 1962
_
Maurice E. Robinson, Lakewood, Ohio, assignor to The
Cleveland Forrngrader Co., Avon, ()hio, a corporation
parts of the several views.
of Ohio
In the drawings:
Filed Apr. 22, 196i}, Ser. No. 23,935
FIG. 1 is a perspective view of an airport form pin
6 Qiaims. (Cl. 254-21)
puller made in accordance with the principles of the in
vention and showing the machine in an operative position
This invention relates to improvements in the pin puller
art, and more particularly to a new and improved pin
at work on a roadway;
puller machine especially adapted for removing pins from
FIG. 2. is a side elevational view of the structure illus
trated in FIG. 1, taken in the direction of the arrow
airport runway concrete forms. it is common practice
when building concrete roads for aircraft runways and
-
marked 2;
the like to pour the concrete between metal forms which
FIG. 3 is a rear elevational view of the structure illus
are secured in place by a plurality of steel pins or stakes 15 trated in FIG. 1, taken in the direction of the arrow
which are driven through suitable holes in the forms.
marked 3;
Machines have been provided heretofore for removing
FIG. 4 is a partial top plan view of the structure illus
trated in FIG. 3, taken along the line 4—4 thereof and
looking in the direction of the arrows;
FIG. 5 is a fragmentary elevational sectional View of
the structure illustrated in FIG. 4, taken along the line
5-5 thereof, and looking in the direction of the arrows;
FIG. 6 is a fragmentary elevational sectional view of
the concrete form pins to reduce the time and labor in
volved in this operation. However, the pin puller ma
chines have heretofore been adapted for use on conven
tional vehicle roads for use in pulling pins from forms for
building such roads. An example of such a vehicle road
pin pulling machine is the stake puller machine shown
in United States Patent No. 2,928,654. An aircraft run
the structure illustrated in FIG. 4, taken along the line _
way is formed to a greater thickness as compared to the 25 6-6 thereof, and looking in the direction of the arrows;
thickness of a vehicle road and, accordingly, the forms
and,
used for making aircraft runways are taller and wider
FIG. 7 is a fragmentary, elevational sectional view of
than the forms used when building roads. The pins used
the structure illustrated in FIG. 4, taken along the line
in securing aircraft runway concrete forms in place are
7—7 thereof, and looking in the direction of the arrows.
therefore disposed outwardly a greater distance from the 30
Referring now to the drawings, a pin puller machine
edge of the poured concrete than the corresponding pins
for securing ordinary road forms. Stake puller machines
made in accordance with the principles of the invention
is illustrated in operative position on an aircraft runway
of the type disclosed in the aforementioned patent em
10. As shown in FIGS. 1, 2. and 3, the numeral 11 gen
ploy a revolving lever structure for removing the form
erally designates a concrete runway side form which is
pins, but such structure is not adapted to remove form 35 illustrative of one of many types used in laying runways
pins which are disposed outwardly any great distance
and the like. The illustrated form comprises the inner
from the edge of the poured concrete. Accordingly, it is
vertical leg portion 12 and the integral horizontal foot
the primary object of the present invention to provide a
portion 13. The form portions 12 and 13 are normally
pin puller machine especially adapted for use in remov
made from steel plates. The outer edge of the foot plate
ing aircraft runway concrete forms which are provided 40 13 is upturned to form a channel edge having the vertical
with securing pins disposed at a greater distance from
portion 14 and the horizontal upper portion 15. The
the edge of the concrete than those used in ordinary road
form leg and foot portions are strengthened by a plurality
forms.
of diagonally disposed interconnecting channel braces
It is another object of the present invention to provide
16. The upper edge of the vertical leg 12 is formed in
an improved pin puller machine which is especially 45 the shape of an integral channel, as indicated by the nu
adapted for airport concrete form pin removal purposes
meral 17. The runway forms are adapted to be secured in
but which is not limited thereto and which is compact and
place on the roadbed by means of a plurality of pins or
rugged in construction, lightweight, efficient in operation,
stakes 18 which are driven through suitable holes as 19
self-propelled and operable by one person who may ride
and 20 in the braces 16 and the foot plate 13, respectively.
on the machine.
50
As shown in FIGS. 1 through 4, the pin puller machine
vIt is a further object of the present invention to pro
of the present invention comprises a wheel supported
vide a novel pin puller machine which is powered by a
truck generally indicated by the numeral 21 which in
small gasoline engine which is adapted to power an oscil
cludes a substantially rectangularly shaped frame. The
lating puller arm that extends outwardly beyond the edge ‘
truck frame comprises the horizontal transversely dis
of the poured concrete whereby the arm may be quickly 55 posed front and rear channel rails 22 and 24, respec
and easily engaged with a pin for removal thereof by
tively, which are interconnected by the longitudinally dis
means of a suitable grappling member. The pin puller
machine of the present invention is also provided with an
adjustable support means which rides on the outer edge of
posed left side channel rail 23. The frame further in
cludes the longitudinally disposed channel rail 25 which
interconnects the front and rear rails 22 and 24 along the
right side of the frame. The outer right side of the
frame comprises the front and rear longitudinal spaced
apart channel rails 27 and 26, respectively, which are
the concrete form so as to eliminate any possibility of the
machine turning over while pulling pins.
It is a still further object of the present invention to
provide a pin puller machine which is completely mechan
interconnected by the horizontal vertically spaced apart
ical in construction and operation and which includes a 65 angle and plate members 28 and 29, respectively. The
longitudinal rail 25 is spaced apart inwardly from the
four-wheeled truck upon which the operative structure is
last mentioned rail structure and it is interconnected by
carried and which truck is adapted to operate with two
a plurality of short transverse channel rails as 25a. The
of the wheels in contact with the inner edge of the con
various aforementioned frame elements are ?xedly
crete form, whereby the pin pulling force is transmitted
secured together by any suitable means as by Welding.
through said two wheels through the concrete forms to 70
As shown in FIGS. 3 and 4, the left side of the truck
the roadbed.
21 is supported by a pair of wheel assemblies generally
Other objects, features and advantages of this inven
indicated by the numerals 30 and 31. The wheel assent
3,063,676
carried by the vertically spaced apart plates 34. The
A
which is ?xedly mounted on the gear reducer input shaft
73. The gear reducer is indicated in FIG. 4 by the
numeral 74 and is ?xedly mounted on the longitudinal
upper ends of the plates 34 are integrally connected by
frame plate 75 by any suitable means, as by the screws 76.
3
'bly '30 comprisesrthe longitudinally spaced wheel 32
which is rotatably mounted on the axle 33 operatively
the horizontal plate 35 which is rotatably supported by
the horizontal plate 36 by means of the bolt 37.
The
plate 36 is ?xedly secured to the longitudinal channel
rail 23 by any suitable means as by welding. The hori
zontal plate 35 has an outward horizontal extension 38.
The wheel assembly 31 is constructed in the same man
ner as- the wheel assembly 30 and the corresponding parts
'are marked with similar reference numerals followed by
the small letter a.
The wheel assemblies 30 and 31
are adapted to ride on the concrete 10.
As shown in FIGS. 3 and 4, the extensions 38 and 38a
are hingedly connected to the interconnecting bar or
arm 40 by means of the bolts 39 and 3%, respectively.
The arm 40 is adapted to be moved substantially for
wardly and backwardly so as to turn the wheels 32 and
32a for steering purposes. The arm 40 is actuated by
" means of the steering lever 41, which has the outer end
thereof hingedly connected to the arm 40 by means of
The gear reducer output shaft 77 has ?xedly mounted
thereon a drive sprocket '78'for driving the roller chain
79 which in turn drives the spocket 80 ?xedly mounted
on the input shaft 81 of the transmission 82. The trans
mission 82 is ?xedly mounted on the plate 75 by any
suitable means, as by the bolts 83. The clutch output
shaft 84- carries a ?xedly mounted sprocket 85 which
drives the roller chain 86 which in turn drives the
sprocket 37 mounted on the inner end of the drive wheel
shaft 54. As shown in FIGS. 2 and 3, the transmission
15 82 is adapted to be operated by means of the control
the bolt 42. The'steering lever 41 extends through the
horizontal slot 43 in the vertical plate 44 which is ?xedly
secured to the channel rail 23 as by Welding. The slot
43 is wider than the lever 41 to permit sideward move
ment therein. Extended inwardly from the vertical plate
" 44 is the horizontal .arm 45 to the inner end of which
is hingedly connected, at the central point thereon, the
steering lever 41 by means of the bolt 46. It will be
seen that the operator may turn the wheels 32 and 32a
about their mounting bolts 37 and 37a by moving the
lever 41 forwardly or backwardly to pivot it about the
bolt 46 which in turn moves the arm 40* forwardly or
backwardly. As shown in FIGS. 1 and 2, the operator
may ride on the machine by means of the seat 49 which
is secured to the rear end of the truck 21 by means of
the channel bars 48 and 49.
As shown in FIGS. 1 and 2, the right side of the truck
21 is supported by the front and rear wheels 50 and 51
which are adapted to ride on the channel 17 which forms
‘the upper end of the form leg 12. The wheel 50 is
'rotatably mounted on the horizontal axle 52 which is
?xedly secured by any suitable means to the longitudinal
outer channel member 27. The wheel is retained on
the shaft 52 by any suitable means, as by the cotter key
53. The right rear wheel 51 is the drive wheel .and is
v?xedly secured to the transverse horizontal drive shaft
‘54 by any suitable means, as by the lock screws 55.
“The shaft '54 is suitably journalled in the bearings 56 50
and 57 which are operatively mounted in the channels
25 and 26. The truck wheels 32, 32a, 50 and 51 are
' preferably providedwith rubber tires.
As shown in FIGS. 4 and 5, the power means for the
lever 83.
The transmission 82 may he of any conven
tional type adapted to provide a forward, neutral, and
reverse action in the aforementioned power drive system.
The gear reducer 74 may also be of any conventional
type. It will be seen from the aforedescribed drive sys
tern that the operator may sit on the seat 49 and control
the self-propelled drive system of the pin puller machine.
As shown in FIGS. 5 and 7, the shaft 63 is adapted to
be disconnected from the driving sprocket 62 by means
of a suitable clutch generally indicated by the numeral
89. The clutch 89 is adapted to be operated by the
lever 9%.
It will be seen that the drive shaft 63 may
be disconnected from the engine 58 during starting opera
tions and the like.
As shown in FIGS. 1, 2 and 3, the pin puller machine
is provided with a pair of form guide rollers, generally
indicated by the numerals 92 and 93, which are adapted
to roll against the outer side of the ?ange 17. When op
erating the pin puller machine, the operator toes the left
‘wheels 32 and 32a outwardly slightly so that the rollers
92 and 93 ride against the edge of the ?ange 17. As
shown in FIG. 2, the roller 92 comprises the vertical
cylindrical tube 94 which is ?xedly mounted to the truck
by any suitable means, as by welding, at the right rear
corner of the truck. Adjustably mounted through the
tube 94 is the threaded rod 95. The rod 95 is held in any
adjusted vertical position in the tube 94 by the nuts 96
and 97. Suitably rotatably mounted on the lower end of
the rod 95 is the roller 98 which engages the outer face
of the ?ange‘ 17. The roller member 93 is constructed
similarly to roller 92 and the corresponding parts thereof
are marked with similar reference numerals followed by
the small letter “a.” The roller member 93 is ?xedly
mounted on the truck 21 at the front right corner thereof.
As shown in FIGS. 1, 2 and 3, the means for pulling
the pins 18 comprises a transversely disposed puller arm
99 which is formed from an elongated bar which is T
shaped in cross section. The arm 99 is pivotally mounted
at a substantially central point thereof on the longitudinal
‘pin puller machine comprises an engine, generally indi 55 ly horizontally disposed shaft 100 which is carried be
'cated by the numeral 58, which is preferably a nine
“horsepower, ‘four cycle gasoline engine, and engines_of
tween the vertical plates 101 and 102. The plates 101
and 102 are longitudinally spaced apart and are ?xedly
secured to the truck 21 by any suitable means. As shown
“this type are readily available on. the market. The engine
in FIG. 1, a pair of pin grappling brackets 103 and 104
"58 is ?xedly mounted on the front end of the truck by
‘any suitable means and includes the output shaft 59 on 60 are suspended from the outer end of the puller arm 99
so as to overlay the form pins 13. As shown in FIG. 3,
‘which is ?xedly mounted, by any suitable means, the
the puller arm 99 extends outwardly of the cement 10and
drive sprocket 60. The sprocket 60 drives the roller
over the runway form 11.
“ chain 61 which is meshably engaged with and drives the
As shown in FIG. 1, the grappling bracket includes the
“ driven sprocket 62 which is ?xedly mounted on the longi
tudinally disposed shaft 63. As shown in FIGS. 4 and 65 horizontal plate 106 which is integral with the vertical
arm 105. Plate 106 has a U-shaped slot 107 extending in
- 7, the shaft 63 is rotatably mounted in the bearing mem
wardly from the outer side thereof for reception of a form
‘* bers 64, 65, and 66 which are ?xedly mounted on the
pin 18. The vertical arm 105 is hingedly connected by the
vertical transverse plates 67,v 68 and 69, respectively.
pin 108 to a suitable cable 109. The upper end of the
The plates 67, 68 and 69 are longitudinally spaced apart
cable 109 is hingedly connected by the bolt 110 to the
and are ?xedly mounted on the truck frame by any suit
lower end of the lever 111, the upper end of which is
able means as by welding. As shown in FIG. 7, the
pivotally connected by the bolt 112 to the vertical portion
rear end of the’ shaft 63 extends through the plate 67
of the puller arm 99. It will be seen that the afore
and has'?xedly mounted thereon the pulley wheel 70.
described structure provides a pin grappling means which
'As ‘shown in FIGS. 3 and 4, the pulley wheel 70 drives
the belt 71 ‘which in turn drives the pulley wheel 72 75 is swingably connected to the outer end of the puller arm
5
3,063,676
99. The bolt 112 may be mounted in any one of the holes
113, as desired, to suit the location of the pins 18 in the
forms 11. The outer grappling means carrying the
bracket 104 is marked with similar reference numerals
followed by the small letter “a.”
As shown in FIGS. 1 and 2, a positioning rod as 115 and
116 is hingedly connected to the brackets 103 and 104,
respectively, by means of the bolts 117 and 118. The
6
justable supporting means, generally indicated by the
numeral 144, which rides on the outer channel space edge
of the form plate 13 to eliminate any possibility of the
machine turning over while pulling the pins 18. The ad
justable support comprises the horizontal channel 145
which extends outwardly from the right side of the truck
21 and which is ?xedly secured thereto by any suitable
means as by welding. A vertical rod 146 is ?xedly se
rods 115 and 116 enable the operator to sit on the seat 49
cured to a vertical plate 147 which slidably engages the
and engage the brackets 103 and 104 with the pins 18. 10 front side of the channel rail 145. The plate 147 is
It will be seen that when the puller arm 99 is pivoted in a
adapted to be ?xedly secured to the rail 145 by means of
counter clockwise direction as viewed in FIG. 3, it will
the bracket member 1148 and the bolts 149. Fixedly
assume the broken line position indicated by the numeral
mounted in the lower end of the rod 146 is a sliding guide
114, whereby the brackets 103 and 104 will be moved
member comprising the horizontal plate 150 and the
upwardly to remove the pins 18 which have been engaged 15 vertical plate 151 which are adapted to slidably engage
by these brackets when the puller arm was in the solid
the form portions 15 and 14, respectively.
line position shown in FIG. 3.
As shown in FIGS. 1 and 3, the roller guide members
As shown in FIGS. 1 and 3, the inner end of the puller
92 and 93 are preferably ?xedly mounted on the arms 91
arm 99 is provided with a longitudinally extended slot
and 91a, respectively, which are in turn ?xedly secured
119 in which is slidably received the pm 120 which is 20 to thetrucks by any suitable means. As shown in FIGS.
?xedly mounted on the large sprocket wheel 121. The
3 and 4, the transmission drive chain 79 is adapted to be
sprocket wheel 121 is ?xedly mounted on the rear end
tightened, as desired, by means of the idler sprocket 152
122 of the longitudinally disposed horizontal shaft 123.
which is adjustably mounted on the bracket 153.
As shown in FIGS. 6 and 7, the shaft 123 is suitably ro
While it will be apparent that the preferred embodiment
tatably journalled in the bearing members 124 and 125 25 of the invention herein disclosed is well calculated to ful
which are carried by the vertical plates 67 and 68. The
fill the objects above stated, it will be appreciated that
sprocket wheel 121 is driven by the roller chain 126 which
the invention is susceptible to modi?cation, variation and
is in turn driven by the small sprocket 127 which is ?xedly
change without departing from the proper scope or fair
mounted on the output shaft 128 of the single revolution
meaning of the subjoined claims.
clutch generally designated by the numeral 129. The 30
clutch 129 may be of any conventional type as, for ex
ample, the type described in detail in the aforementioned
What I claim is:
1. A pin puller machine for pulling pins from a con
crete form comprising: a wheel supported truck; an en
Patent No. 2,928,654 to N. P. Dann et al. The clutch
gine mounted on said truck; a transversely disposed
129 is adapted to be operated by the lever 135 which is
puller arm rockably mounted on said truck and having
pivotally mounted on the bolt 136. The inner end of the 35 an outer and inner end, the outer end thereof extended
lever 135 is operatively connected to the rod 137 for op
sidewardly outwardly beyond one side of said truck; a
erating the clutch 129.
pin grappling means adjustably mounted on the outer end
As shown in FIG. 6, the clutch 129 is provided with
of said puller arm; drive means mounted on said truck
an input shaft 130 and the clutch shafts 128 and 130 are
and being connected to the inner end of said puller arm
suitably journalled in the bearing members 131 carried 40 for providing a rocking motion to said arm to move the
by the vertical plates 67 and 68. Operatively connected to
outer thereof upwardly and downwardly; a power system
the clutch input shaft 130 is the drive gear 132 which is in
interconnecting said engine and drive means for trans
turn driven by the idler gear 133. As shown in FIG. 7,
mitting power from‘ the engine to said drive means; an
the idler gear 133 is ?xedly connected to the rear end of
adjustable supporting means mounted on said truck and
the pulley shaft 134 which is suitably journalled between 45 extended sidewardly outwardly for sliding engagement
the vertical plates 68 and 69. Fixedly mounted on the
with the concrete form to prevent tipping of the machine
shaft 134 is the large pulley which is driven by a plurality
during a pin pulling operation; said wheel supported truck
of V-belts '139. As shown in FIGS. 4 and 7, the belts
being provided with a pair of wheels on a ?rst side thereof
139 are driven by the pulley 140 which is ?xedly mounted
adapted to ride on the concrete form and a pair of turn
on the shaft 63 which is driven by the engine 85 in the 50 able wheel on a second side thereof adapted to ride on
manner previously described.
the concrete; steering means connected to said turnable
As shown in FIG. 5, the pin puller machine may be
wheels for turning the same to guide the truck to position
provided with a belt take-up roller 141 adjustably carried
the grappling means over the pins in a concrete form for
by the bolt 142. The bolt 142 is adjustably mounted on
pin pulling operations; at least one of said wheels being
the angle bar 143 which is extended between the vertical
a power traction wheel for moving vthe machine; and,
plates 68 and 69 by any suitable means as by welding.
drive means connecting said power traction wheel to said
When the operator wishes to remove a pair of pins 18
power system.
from the form 11, he ?rst engages the brackets 103 and
2. A pin puller machine as de?ned in claim 1, includ~
104 on the upper ends of the pins. Assuming that the
ing a pair of guide rollers adjustably mounted on said
engine 58 is operating, the operator then pivots the clutch 60 truck and adapted to ride against the concrete form outer
lever 135 to operate the clutch 129 whereby the sprocket
edge for guiding the machine along the concrete form.
wheel 121 will make one complete revolution and will
3. A pin puller machine for pulling pins from a con
move the puller arm 99 to the up position 114 and then
crete form comprising: a wheel supported truck; an en
downwardly to the solid line position shown in FIG. 3,
gine mounted on said truck; a transversely disposed puller
where it is ready for another pin pulling operation. It 65 arm rockably mounted on said truck and having an outer
and inner end, the outer end thereof extended sidewardly
will be seen that the pin puller machine is designed so
that a single operator can sit in the seat 49 and operate
beyond one side of said truck; a pin grappling means ad
the pin pulling means with his right hand and operate the
justably mounted on the outer end of said puller arm;
drive means for the machine with his left hand. The
drive means mounted on said truck and being connected
engine 58 is set at a constant speed and the pin pulling 70 to the inner end of said puller arm for providing a rock
action is initiated by operating the clutch arm 135 in the
ing motion to said arm to move the outer end thereof
aforedescribed manner.
It will be seen that the pin
pulling pressure is directed downwardly through the right
upwardly and downwardly; a drive shaft mounted on said
truck; means including a disconnect clutch interconnect
side wheels 50 and 51 onto the form ?anges 17. The
ing said engine and said shaft for transmitting power to
machine of the present invention is provided with an ad 75 the shaft; said drive shaft being interconnected to the
3,063,676
8
drive means .for rocking said puller arm by means includ
ing a belt drive mechanism and a single revolution clutch;
and, ‘means for adjusting the tension of the belts in said
.belt drive‘ mechanism.
4. A pin puller machine as de?ned in claim 3, wherein:
said wheel supported truck is provided with a pair of '
Wheels on a ?rst side thereof ‘adapted to ride on the con
crete form and a pair of turnable wheels on a second side
thereof adapted to ride on the concrete; steering means
are connected to said turnable wheels for turning the 10
same to guide the truck‘to position the grappling means
over the pins in a concrete form for pin pulling opera
tions; at least one of said Wheels being a power traction
wheel for moving the machine; and, drive means including
a clutch connecting said drive shaft to said power traction 15
wheel.
5. A pin puller machine as defined in claim 3, including
an adjustable‘ supporting means mounted on said truck
and-extended sidewaIdly-outwardly for sliding engage
'ment with the concrete "form to prevent tipping of the
machine during a pin(pulling-"operation.
6._ A pin puller machine as de?ned in claim 4, including
a pair of guide rollers‘ adjustably mounted on said truck
and adapted to ride against the concrete form outer edge
for guiding the machine along the concrete form.
References Cited in the ?le of this patent
UNITED STATES PATENTS
2,821,360
2,911,190
Marshall ____________ __ Jan. 28, 1958
Creason ______________ __ Nov. 3, 1959
2,928,654
Dann et a1 ____________ "Mar. 15, 1960
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