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Патент USA US3099304

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July 30, 1963
c. M. RlVELY ETAL
3,099,296
METHOD OF BENDING AND SETTING ELONGATED ARTICLES
Griginal Filed Aug. 11. 1958
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July 30, 1963
c. M. RIVELY ETAL
3,099,296
METHOD OF BENDING AND SETTING ELONGATED ARTICLES
Original Filed Aug. 11. 1958
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BY
July 30, 1963
c. M. RIVELY ETAL
3,099,296
METHOD OF‘ BENDING AND SETTING ELONGATED ARTICLES
Original Filed Aug. 11. 195B
3 Sheets-Sheet 3
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so 46 an 44
INVENTORS
("Z/WE‘ M. P/l/ELYand
Ema/9R0 GOES/‘V
BY 2 g i
'
8‘,
?UUE/VEV.
United states 2. atent Uhice
3,699,296
Patented July 30, 1953
1
3,0993%
METHOD OF BENDING AND SETTING
ELUNGATED ARTICLES
Clair M. Rively, Rockaway, and Edward Gorski, Bloom
?eld, N.J., assignors to Westinghouse Electric Corpora
tion, East Pittsburgh, Pin, a corporation of Pennsylvania
Original application Aug. 11, 1958, Ser. No. 754,490. Di
vided and this application June 17, SW59, Ser. No.
is further operable to move along the portion of the lead
wire to be bent to incrementally decrease the distance be
tween the point of protrusion and the point of application
of the bending force and to bend such portion against
the stationary member, thereby substantially forming the
desired bend until such distance approaches the thickness
of the elongated article, whereupon the movable member
squeezes the bend in such elongated article against the
stationary member thereby completing the bend and up
2 Claims. (Cl. Mil-71.6)
setting the metal at the bend and giving the latter a per
10
manent set.
The present invention relates to the bending of elon
825,628
gated articles and, more particularly, to a method and
apparatus for bending and setting the lead wires of in
candescent lamps.
Heretofore, ?lament mounts for vertical-?lament type
incandescent lamps have been fabricated on a conven
For a better understanding of the invention reference
should be had to the accompanying drawings wherein like
numerals of reference indicate similar parts throughout
the several views and wherein:
FIG. 1 is a front-elevational view of a lead-wire bending
and setting station of an automatic mount-making ma
tional mount-making machine of the type shown in US.
Patent No. 1,907,532, issued May 9, 1953, to J. Flaws, Ir.
At one of the work stations of such machine, a right angle
bend is formed in each of the lead wires (preparatory for
chine and showing the position of the lead-Wire bending
and setting devices of the present invention, a portion
of the turret of such machine and a head supported by said
the mounting of the vertically disposed ?lament) by bend
turret for carrying a stem therein, after such head has
ing apparatus of the type shown in German Patent No.
844,588. Forming tools of this type tend in some in
stances to shear, rather than to bend, the lead wires into
the desired right-angle con?guration. In addition, a sep
arate forming tool must be utilized for each size of the
lead wire to be bent. Owing to the spring-back of the
been indexed into the bending and setting station.
FIG. 2 is a vertical-sectional view along the line 11-11
lead wire after the bending operation (which spring-back
varies with the temper of the individual lead wires) lead
wires bent in the same die are not necessarily identical in
shape after bending.
Hence, it is necessary to employ a
setting tool at the next work station to set the right-angle
bend. This setting operation is accomplished by a ?rst
pair of jaws which grip the portion of the lead wires at
of FIG. .1 in the direction of the arrows and showing
the details of the left-hand lead-wire bending and setting
device, as viewed in FIG. 1.
FIG. 3 is a plan view along the line III-III of FIG. 1
in the direction of the arrows with the lead wires shown
in section.
FIG. 4 is a fragmentary vertical-sectional view similar
to FIG. 2 after the bending and setting device has been
moved to position the locating slots therein about the
lead wire of the stem preparatory for the bending and
setting operation.
and below the bend and a second pair of jaws which grip
FIG. 5 is a perspective view of the bending and setting
the bent end of the lead wires and which stretch such bent
end against the side of the ?rst pair of jaws (serving as
an anvil) thereby setting the metal at the bend. Due
to the amount of pressure which must be exerted by the
second set of jaws on the lead Wires to effect the lead
wire setting operation, the bent end of such lead wires is
often deformed by the force exerted by the second set of
jaws thereon and in some instances the wire is weakened
at the bend by such excessive force. In addition, this
method of bending the lead wires requires the use of
an extra work station and the added setting tool.
It is the general object of the present invention to avoid
and overcome the foregoing and other di?iculties of and
objections to prior art practices by the provision of an
devices of the present invention having portions of the
lead-wire guides and lead-wire strippers removed for the
sake of clarity and showing the position of such devices
after the latter have been positioned about the lead wires
preparatory to the bending and setting operation.
FIG. 6 is a perspective view of a preferred embodiment
of one of the bending and setting dies.
FIG. 7 is a view of FIG. 6 of an alternative embodi
ment of one of the bending and setting dies.
FIG. 8 is an enlarged vertical-sectional view along the
lines VIII—VIII of FIG. 5 in the direction of the arrows
and showing the details of the bending and setting de
vice.
FIG. 9 is a view similar to FIG. ‘8 illustrating an in
improved method and apparatus for bending and setting 50 termediate position of the gripping jaw and bending ‘and
elongated articles.
setting die, wherein the gripping jaw has engaged the
Another object of the present invention is the provision
lead wire positioned in the vertical locating slot within
the stationary portion of the bending and setting device.
of apparatus for bending the lead wires of incandescent
lamp mounts to a desired con?guration, which apparatus
FIG. 10 is a fragmentary vertical-sectional view show
is adapted to bend a wide range of lead-wire sizes and
which will not shear the lead wires at the bend.
A further object is the provision of apparatus at one
work station of an automatic ?lament mount-making ma
ing the position of the parts after the bending and
setting die has engaged the lead wire at a point relatively
distant from the point of protrusion of the lead Wire
from the stationary portion of the device.
chine which apparatus is adapted to perform both the
FIG. 11 is a view similar to FIG. 10* and showing the
bending and the setting operations on the lead wires of 60 position of the pants after the bending and setting die
incandescent lamps.
has incrementally decreased the distance between the
The aforesaid objects of the invention, and other objects
point of protrusion and the point of application of the
which will become apparent as the description proceeds
bending force so that the portion of [the lead wire to be
are achieved by providing a bending and setting device
bent has been substantially formed into the desired bend
located at a station of the stem-making machine, which 65 and such distance has approached the diameter of the
device has a stationary member from which the elongated
lead wire.
article protrudes and a movable member operable to
FIG. 12 is a view similar to FIGS. >10 and 1-1 and show
apply a bending force to the portion of the elongated
ing the further continued movement of the bending and
setting die to squeeze the bend against the stationary
portion of the bending and setting device to complete
the bend and upset the metal at the bend thereby giving
article to be bent at a point relatively distant from the
point of protrusion of such portion to initially provide
a relatively large bending radius (thereby preventing the
shearing of the elongated article). The movable member
such bend a permanent set.
3,099,296
3
FIG. 13 is an enlarged fragmentary vertical-sectional
view along the line XIII-XIII of FIG. 12 and showing
diagrammatically the application of the setting forces to
the bend and illustrating with the horizontal dotted arrows
the direction of the resultant deformation of the bend
between the stationary portion and the bending and
setting die.
FIG. 14 is a view similar to FIG. 13 showing the
4
44 (FIGS. 1 and 1042), one side of which is formed
in the forward face of each of the adjacent die blocks 36‘
(FIGS. 3 and 5). The other side of the vertical locating
slots 44 is formed by an anvil 45 removably mounted on
the die block 36 to provide a stationary forming means
for the bending and setting operation. Although the
anvil 45 may be an integral part of the die block 36, for
purposes of replacement it is ‘advisable to make it a sep
radial application of the squeezing forces and the direc
arate and removable part as shown in FIG. 3. The for
tion of the deformation when the bending and setting die 10 ward movement of the carriage 32 and die blocks 36 fnom
the position shown in FIG. 3 to the position shown in FIG.
shown in FIG. 7 is utilized.
FIG. 15 is a side-elevational view of a ?nished lamp
5, positions these locating slots 44 about the lead wires
mount fabricated on the automatic mount-making ma
16, thereby aligning the latter in such die blocks 36 pre
chine with which the bending and setting devices of the
paratory for the bending and setting operation. To pre
present invention are associated.
15 vent the lead wires 16 from being wedged in the locating
Although the principles of the invention are broadly
slots 44 after the bending and setting operation and to
applicable to the bending of elongated articles, such as
permit removal of the bent lead wires 16 from these locat
ing slots 44, stationary strippers 46 are mounted on the col
wire and strip, and the setting of such bends, the in
vention is particularly adapted for use in conjunction
umns 42 and have their operating ends positioned behind
with the bending of the lead wires of incandescent
the stationary guide 318 in registry with the locating slots
lamp stems preparatory for the mounting of a vertically
44.
disposed ?lament thereon and hence it has been so illus
Since the locating slots 44 are reciprocated about the
tr-ated and will be so described.
strippers ‘46 and the lead wires 16 of successive stems 14
With speci?c reference to the form of the invention
during each index of the mount-making machine (not
illustrated in the drawings and referring particularly to 25 shown), excessive wear in these locating slots 44 is pre
FIGS. 1 and 2, a turret of a conventional mount-making
vented by adjustably mounting removable guide plates 48
machine (not shown, but of the type shown in the above
mentioned US. Patent No. 1,907,532) is indicated gen
enally by the reference numeral 191. This turret is
adapted to support a plurality of conventional stem
su-pporting heads 12 which are indexable there-by through
a like number of work stations (not shown) by a con
44 in the die block 36. These guide slots 50‘ position the
strippers 46 and the lead wires 16 in the locating slots: 44
ventional indexing mechanism (not shown, but of the
(FIG. 5) and backwardly by a carriage-reciprocating
on the top of the die blocks 36, which guide plates 48 are
provided with guide slots 50‘ aligned with the locating slots
and hence absorb most ‘of the resultant contact wear when
the carriage 32 and die blocks 36 \are moved forwardly
type shown in U.S. Patent No. 2,569,852, issued October
mechanism.
35
2, 1951, to J. H. Green).
Carriage-Reciprocating Mechanism
After a stem 14 (FIGS. 1, 2 and 15) has been trans
This
carriage-reciprocating
‘mechanism comprises a ver
ferred from an adjacent stem-making machine (not
tical cam 52 (FIGS. 2, 3 and 4) supported ‘for vertical
shown) to a head v12 at a ?rst station (not shown) of the
reciprocating movement by an arm 54 carried by an op‘
support wires 16 of the stem 14 are pushed back at a 40 erating plunger 56 of an operating mechanism (utilized
to actuate both the carriage-reciprocating mechanism and
second station (not shown) to permit the heating of the
mount-making machine, electrical lead-in and ?lament
end of the arbor 1-8 at three later stations (not shown)
the bending and setting devices of the present invention,
preparatory to the formation of a button 20 on the end of
as hereinafter explained in detail).
the arbor 1'8‘ and the insertion of the support wires 22
therein at the next station (not shown). At subsequent
stations (not shown) the lead wires 16 are repositioned
and the ends thereof are trimmed and ?attened. Hooks
roller 58 (FIGS. 2, 3 and 4) mounted on the carriage 32
in spring-‘biased engagement with the vertical cam 52, a
compression spring 60 is contained within a suitable hole
in a spring retainer 62 (mounted on the left-hand portion
of the mounting bracket 28, as viewed in FIGS. 2 and 4)
and such spring surrounds an aligning pin 64 projecting
24 are formed in the tnimmed ends of the lead wires 16
In order to hold a
at ‘another station (not shown) whereupon the stem 14
is indexed into the lead-wire bending and setting station 50 from a suitable plate a?ixed to the lower left-hand end of
the carriage 32.
(FIGS. 1 and 2) where a right-angle bend is formed at
As shown in FIG. 2, the aforesaid operating plunger 56
the end of each lead wire 16 by a pair of bending and
is connected by a link 66 to a cam lever (not shown) held
setting devices of the present invention located at such
in spring-biased engagement in the usual manner with
station, in prepanation for the subsequent mounting of
a rvertically disposed ?lament 26 (FIG. 15) in the hooks 55 an operating cam (not shown) which may be on the main
cam shaft of the mount-making machine. Such operating
24 of the bent and set lead wires 16.
plunger 56 is vertically reciprocable in a suitable bush
The means utilized to provide a supporting structure
ing 68 provided in the mounting bracket 28 by the above
for the bending and setting devices of the present inven
mentioned operating mechanism. To prevent lateral
tion comprises a mounting bracket 28‘ (FIGS. 1, 2, 3, 4
and 5) secured to frame portions 30‘ (FIGS. 1 and 2) of 60 movement of the operating plunger 56 during its recipro
cation by the operating mechanism, the arm 54 rides on a
the mount-making machine (not shown). This mount
suitable guide 70 mounted between left-hand ?ange por
ing bnacket 28 has a pair of guide blocks 34 a?ixed to
tions of the mounting bracket 28, as viewed in FIG. 2.
its upper surface, "as viewed in FIGS. 1 and 3, in which
At a predetermined time after the stem 14 has indexed
a carriage 32 of the bending and setting devices is slid
ably mounted, thereby permitting the carriage 32 and a 65 into the lead-wire bending and setting station, and the lead
wires 16 have been preliminarily aligned by the stationary
die block 36 adjustably secured to each side of such
guides 38 in registry with the locating slots 44 and the
carriage 32 to be moved toward and away from the lead
guide slots 50, the operating cam. (not shown) on the
wires 16 of a stem 14, while the latter are positioned at
aforesaid main cam shaft of the mount-making machine
the lead-wire bending and setting station.
As a head 12 and a stem 14 are indexed into the lead
wire bending and setting sation, the lead wires 16 ride
along a stationary guide track 38 (FIG. 3) mounted on
supports 40 projecting from columns 42 upstanding from
the guide blocks 34 and such lead wires are approximately
70 causes the operating plunger 56 and the vertical cam 52
to move upwardly a distance a (FIGS. 2 and 4) from the
solid-line position shown in FIG. 2 to the solid-line posi
tion shown in FIG. 4, thereby causing the roller 58 and
the carriage 32 to move to the left (as viewed in such
positioned thereby in registry with vertical locating slots 75 ?gures) 'a distance a’ with attendant positioning of the
3,099,296
5
locating slots 44 and the guide slots 50 ‘about the lead
wire strippers 46 and the lead wires 16 preparatory for
the bending and setting operation by the bending ‘and set
ting devices of the present invention.
Bending and Setting Devices
Since the bending and setting devices of the present
bending surface 94 on the upper face of a frusto-Wedge
like forward portion of the bending and setting die 72
engages the lead wire 16 at a point “A,” the point of ap
plication of the bending force. To provide satisfactory
operation of the bending and setting die 72, the bending
surface 94 is desirably inclined at an angle ,8 (FIG. 11),
suitably about \15°. To reduce maintenance costs the
invention are identical in structure and operation but bend
bending and setting die 72 is provided with a bending sur
the two lead wires in opposite direction, it is deemed su?i
face 94 at each end and when one such surface 94 wears,
cient to describe such devices with respect to the left 10 the die is merely reversed in the slot 77 and the bending
hand bending and setting device, as viewed in FIG. 1,
and shown in detail in FIGS. 6v and 8 through 12.
In addition to the anvil 45 the bending and setting de
and ‘setting operation continued.
This point “A” is disposed a distance a’ (FIG. 10‘) from
point “B,” the point of protrusion of the lead wire 16
vice has a movable member, such as a bending and setting
from the anvil ‘45, thereby providing initially a relatively
die 72, for bending the lead wire 16 against the anvil 15 large bending radius (namely the distance d) and pre
45 and setting such bend and a movable gripping jaw
venting the shearing of the lead wire 16 during the bend
74 movable with the bending and setting die 72 to secure
ing thereof. Thereafter, the bending and setting die 72
the lead wire 16 (positioned in the locating slot 44)
moves along the portion of the lead wire 16 which is be
against the anvil 45 before the bending and setting die 72
ing bent to incrementally decrease such distance between
engages the lead wire. To permit this movement of the
the point of protrusion (point “B”) and the point of ap
bending and setting die 72 and the gripping jaw 74 within
plication of the bending ‘force (point “A”) with attendant
the die block 36, such gripping jaw 74 is carried by the
bending of such portion against the anvil 45 until such dis
bending and setting die 72, and both are reciprocable in
tance approaches the thickness (i.e. the diameter), of the
a suitable longitudinal slot 77 (FIGS. 8 and 9) in the
lead wire 16-, as seen in FIG. 111. At this stage of the
front sidewall of the die block 36 and are slidably retained 25 bending and setting operation as shown in FIG. 11, the
therein by a retainer plate 78 af?xed to such die block
bend in the lead wire 16 has been substantially formed
36. So that the gripping jaw 74 and the bending and set
and the free end of such bent portion is lying on the bend
ting die 72 may move together until the gripping jaw 74
ing surface 94. Continued movement of the bending and
engages the lead wire 16 and thereafter the bending and
setting die 72 to the right, as viewed in FIGS. 11 and i12,
setting die 72 may continue its movement with respect 30 a distance d1 (‘from the position shown in FIG. 11, to the
to the gripping jaw 74 to perform the bending and set
position shown in FIG. 12) causes the bending and set—
ting operation on the lead wire, the bending and setting die
ting die to squeeze the bend in the lead wire 16 against
72 is provided with an upstanding pin 80 movable in a
the anvil 45 to cause flattening of the bend at the points
slot 81 in the gripping jaw 74. The left-hand shoulder
indicated by the solid arrows in FIG. 13 and deformation
of such slot 81 (as viewed in FIGS. 8 and 9) is spring 35 of such bend in the direction indicated ‘by the dotted ar
biased into engagement with such pin 80 by a spring 82
rows in FIG. 113 thus upsetting the metal in the bend to
secured within suitable apertures in the left-hand end
give the wire a permanent set, in the position indicated in
wall of the gripping jaw 74 and in a spring retaining
FIG. 12 This setting of the bend in the lead wire 16
bracket 84' lat-?xed to the left-hand end of the die block 36.
is accomplished by providing (by pressure) a stress in
The means utilized to cause the above-mentioned. move 40 the bend, which ‘stress exceeds the yield point of metal
ment of the bending and setting die 72 and the gripping
in such lead wire, thereby permanently setting the bend.
jaw 74 has a vertical cam track 84 (FIGS. 1, 2, 4 and 5)
Thereafter downward retraction of the operating plung
mounted on a cam support .86 which in turn is af?xed to
er 56 the distance b (by operation of the above-mentioned
a plunger 88 reciprocable in the carriage 32. This plunger
operating cam not shown) causes similar retraction of
88‘ is biased by a spring 96 to the “down” position shown 45 the plunger 88' (under in?uence of the spring 96 there
in FIGS. 1 and 2. Such cam track 84 has its side~wall
about) and of the cam track 84 with resultant horizontal
cam surfaces in engagement with rollers 90 projecting
retraction to the left of the left-hand bending and setting
from the bending and setting die 72.
device, as Iviewed in FIGS. 1 and 5, from the position
It will be seen from a consideration of FIGS. 2 and 4
shown in FIG. L2 to the initial position shown in the
that when the operating plunger 56 has been moved up 50 previously mentioned ?gures. The continued downward
wardly the distance a (from the solid-line position of
movement of such operating plunger 56 the distance a
FIG. 2 to the solid-line position of FIG. 4) to cause the
from the solid-line position shown in FIG. 4, to the solid
forward movement of the carriage 32 and the position
line position shown in FIG. 2, causes horizontal retrac
ing of the locating slot 44 about the stripper 46 and the
tion of the carriage 32 and the bending and setting de
lead wire 16, a pad 92 on the upper end of the operating 55 vices carried thereby away from the now bent lead wires
plunger 56 is moved into engagement with the bottom of
‘16 to permit the indexing of the head 12 out of the lead
the plunger v88. The continuous upward movement of
wire bending and setting station. Although the opera
the operating plunger 56 causes the plunger 88 to move
tion of the device ‘as above described has been restricted
upwardly a distance b, as viewed in FIGS. 1, 2 and 5,
to the movement of the parts in response to the movement
against the action of the spring 96 thereby causing simi 60 of the left-hand cam track 84, it will be understood that
lar upward movement of the cam support 86 and the cam
precisely the same operation simultaneously occurs but
track 84 carried thereby.
in an opposite direction in response to the reciprocal
This upward movement of the cam track 84 causes
movement of the right-hand cam track 84.
the rollers 90, the bending and setting die 72 and the grip
Thereafter the head 12 and the now bent stem 14 car
ping jaw 74 of the left-hand bending and setting device, 65 ried thereby are indexed to subsequent work stations
as viewed in FIGS. l1 and 5, to move horizontally to the
right from the position shown in FIG. 8. During such
movement the gripping jaw 74 and the bending and set
ting die 72 move from the position shown in FIG. 8 to
the position shown in FIG. ‘9, where the gripping jaw 74 70
engages the lead wire 16 and secures ‘such lead wire
against the anvil '45’. Thereafter, as indicated above, the
where in the usual manner the lead wires 16 are crirnped;
the ?lament 26 is positioned in the books 24 of the now
bent lead wires 16 and clamped therein; and the support
wires 22 are curled about the ?lament 26 and the lead
wires 16 to form the ?nished lamp mount, shown in FIG.
15.
From a consideration of FIGS. 7 and 14, it will be
bending and setting die 72 moves to the right, as viewed
come apparent that, as an alternative embodiment, a
in FIG. 9, with respect to the now stationary gripping
bending ‘and set-ting die 72a may be utilized, which die
jaw 74 until, as shown in FIG. 10, the leading edge of a 75 72a has the frusto-wedge-like forward portion thereof re
3,099,296
8,
suppont wire for an incandescent lamp without subject
ing the wire to excessive shearing stresses, which method
comprises, initially bending a portion of said ‘lead-in wire
through a relatively large radius by applying a bending
force between ‘selected points ‘on'said lead-in wire which
placed by a longitudinally disposed pyramidal-shaped
bending slot ‘98 having outwardly diverging sidewalls and
a downwardly inclined bottom inclined at the angle ,8
(about 115°) from the upper face of the die 72a. This
slot 98 more positively holds the bent portion of the lead
wire 16 in a plane de?ned by the portions, of such lead
wires which depend from the press of the stem 14.
During use of the bending and setting die 72a in the
above-described setting operation, the lead wire 16 is
' ‘are relatively distant from one another, further bending
said ‘lead-in wire while incrementally decreasing the dis
tance between the points on said lead-in wire through
which the bending force is ‘applied, continuing to bend said
slightly ?attened by the application of radial forces at 10 lead-in wire while continuing to incrementally decrease
the distance between the points on ‘said lead-in wire
the points indicated by the solideline arrows of FIG. 14
through which thebending force is applied until the bend
to produce deformation of such bend in the direction of
ing force is ‘applied between points on said lead-in wire
the dotted arrows shown in such ?gure.
which ‘are sepanated by a distance approaching the thick
It will be recognized by those skilled in the art that
the objects of the’ present invention have been achieved 15 ness of said lead-in wire, and thereafter squeezing said
lead-in wire at the bent portion to complete the bend
by the provision of an improved method and apparatus
and also to upset the metal at the bend to set the bend
for bending and setting elongated articles, such as wire
against any springback.
and strip. The apparatus of the present invention is
2. The method as speci?ed in claim 1,. wherein said
adapted to bend a wide range of sizes of such elongated
lead-in wire before bending vis initially gripped to secure
articles and will not shear the ?atter during the bending
same in predetermined position.
thereof. In addition, such apparatus performs both the
bending and setting operation on such elongated articles.
While in accordance with the patent statutes one best
known embodiment of the invention has been illustrated
and described in detaiLit is to be particularly understood 25
that the invention is not limited thereto or thereby.
This is a division ‘of ‘Serial No. 754,490; ?led August
11, 1958, now abandoned
We claim:
,
1. The method‘of forming a permanent bend in a 1irn-_ 30
ited portion of an relongaed electrical lead-in and ?lament
References Cited in theiileof this patent
UNITED STATES PATENTS
123,079
563,798
Beecher _____________ __ Jan. 30, 1872
Peters ____‘___ ‘ _______ -_ July 14, 1896
2,609,192
2,732,879
Lermont ___
Andresen __“
_____ __ Sept, 2, 1952
_____ __ Jan. 31, 1956 '
2,781,796
Dilts _____L _____ __>_____ Feb. 19, 1957
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