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Патент USA US2409673

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Oct. 22, 1946.
W. C. EWALDSON
STRAND F ORMING AP
Filed March 15
2,409,670 _
PARATUS
2 Sheets-Sheet l 1
, 1945
INVENTOR
mg. EWALDSON
8)’
J52?
TTO RNEY
Oct. 22, 1946.
w_‘¢_ EWALDSQN '
_
2,409,670
, STRAND FORMING APPARATUS
Fi]_.ed March 15, 19,45
2 Sheets-Sheet 2
TTORNEY
Patented Oct. 22,1946
‘2,409,670
"‘ UNITED . STATES “ PATENT OFFICE‘ i
' Waldemar C. Ewaldson, Millington, .N.‘J., assignor
to Western Electric Company, Incorporated,
New‘York; N. Y., a corporation ‘of New York
Application March 15, 1945','seria1 No. 582,970
.9, ‘Claims. (01. 28-1) .
1
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‘
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paratus, and more particularly toapparatus for
forming switchb‘oar'dcables.
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2
the ends of the ‘latter ‘being supported in parallel
members 22 of a lever 23. The shaft 2| is ?xed
invention relates to strand forming ap
in position by a set screw 24. ‘The lever 23 is
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pivotally mounted upon a shaft 26‘, the outer ends
of which are mounted in apertures in the sides II I.
An ‘upwardly projecting arm ‘21 of the lever .23
supports a cam block 28 which is positioned to
i In the manufactureof switchboard equipment,
it has been found advantageous to provide the
cables, with their groups of electrical conductors
which are to complete the necessary electrical
connections with the various electrical units, to
ride upon the periphery of a cam 39.
The cam
36 is mounted upon a shaft 3| and has a peripheral
be ‘substantially ?at and with given dimensions
so that they may be ‘easily positioned in the 10 contour as illustrated in Fig. l: with the peripheral
surface thereof ‘beginning at a low portion 32,
‘and having a’cons'talnt rise to its highest portion
33. “The s‘haft‘3l is j-ournalled in suitable bear
switchboard structures consuming a minimum of
space therein.
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7
An object of the invention is ‘to provide a strand
ings 34 in the sides II, and has a dial 35 ?xedly
forming apparatus which is simple in structure
andhighly efficient in compressing strands into 15 mounted upon the ‘forward end thereof. vThe dial
‘35 ‘is divided adjacent its periphery by gradua
predetermined cross sectional contours of given
thicknesses.
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I
v.
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tions “3'6 which are to indicate one hundredths of
‘an‘in‘ch‘the ‘thickness to which the strand or ma
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With this and ‘other ob'jectsin View, the inven
terial is to be reduced while passing between the
rollers M and 2!)‘. The graduations 36 are there
‘fore spaced proportionately to the varying con
tour of the cam 30 so that, by positioning a given
graduation adjacent a pointer.38,..it will be known
tion comprises a strand forming apparatus par
ticularly adapted for ‘forming cables and‘includ
ing‘ a rotatable roller with a- fixed axis, cooperat
ing with a companion roller, the latter being
mounted on a‘ movable axis, parallel to the ?xed
"that a given portion of the ‘cam ‘surface 39*wi11
to compress a strand into a given cross sectional Ni t1 be ‘adjacent’ the cam block 28 to locate the roller
"axis and under ‘a predetermined variable pressure
21] a ‘selected measured distance from the roller
.14. The dial 315 is provided with a handle 35,
by the :aid of which it may be ‘manually rotated
in either direction relative to the pointer 38. ‘The
pointer 38 is mounted upon a housing 40 which
is a part of the cover I2. The housing 40 includes
aplunger 4| positioned to engage the back of the
dial 35 and apply a predetermined braking‘ or
holding force to the dial through the aid of a
contour during‘the advancement of the strand.
Other objects and ‘advantages will be apparent
from the ‘following detailed description when con
sidered in conjunction with the accompanying
drawings, wherein
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’
"Fig. 1‘ is a ‘front elevational view of one species
of theinventionj
Fig. 2
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a 'front elevational view of the ‘struc
ture shown in Fig. 1, portions thereof being broken
10 L!
‘away while others are shown‘ in section; _
Fig. 3 is an "enlarged fragmentary front ele
vational view of the dial and pointer of the struc
ture‘shown in Fig. 1;
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Fig. 5 is a fragmentary sectionalview taken
along the 1ines'5—5 of Fig. 4.
‘r
force may be‘ varied through the actuation of an
adjusting screw £3 threadedly disposed in a‘ nut
‘
‘ Fig. 4 is a fragmentary sectional view of an
other species of the invention; and
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‘ “
Referring now to the drawings, attention is
?rst directed to Figs. 1 to 3 inclusive. The species
of the invention shown in these ?gures includes a '
spring 42. ‘The spring 42 isdisposed in the hous
ingand in "the hollow end of the plunger M. Its
PM which closes the end of the housing 40.
40
Pressure ‘means is ‘provided to normally hold the
rollerJZil the selected measured distance from the
roller‘ 1'4. This means includes a spring 46 which.
“rests upon a member 41, the latter being disposed
upon the free end of the lever 23 and connected
thereto ‘as indicated‘at 48. An adjustable screw
frame composed of a base HI and‘vertical sides‘ I I
mounted thereon; the upper ends of‘the sides being
‘closed by a cover l2.' A roller M, having end
‘members l5 integral therewith, is mounted‘upon a
‘shaft IS, the ends ‘of which ‘are supported by
43 threadedl'y disposed in an aperture 50 of the
cover I2 is provided ‘to vary the force in the spring
bearings H, the latter being supported asillus
of thé‘invention, the strand or material to be
vformed is what is known as switchboardrcable
‘trated in Fig. 2 in apertures in the sides H; A
companion roller 20, positioned to interengage
‘the roller M ‘by extending between the end mem
‘bers ‘I35, is ‘rdtatably ‘mounted‘upon ‘a shaft ‘2|,
‘toi‘be applied to the lever 23 and, through it, to
the roller 20.
V
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' ‘Considering now the operation. of this ‘species
‘having a‘ contour, ‘after the assembling of the in
isulated electrical conductors in a sheath of se
lected materialswhich is round or oval in cross
2,409,670
3
4
section. More speci?cally the switchboard cable
convolutions of the conductors in close proximity
may be either one of two forms; one, the nor
to the pressboard core and cause them to be set
mally round form and the other, normally oval
in this position without damaging the insulating
form. The round form includes a group of insu
coverings on the conductors or the layers of
lated electrical conductors, their insulations being 5 material surrounding the conductors.
If a different type of strand or cable is to be
of a chosen group of color combinations, which
after being brought together in a cable forming
formed, the apparatus may be adjusted to vary
machine, are tied or bound together by a spiral
the desired distance between the rollers l4 and
textile wrapping, after which a double spiral
20 by rotating the dial 35 through the aid of the
wrapping of paper is applied. Over the paper, 10 handle 39 until the selected indications on the
a spiral wrapping of metal foil is added and then
dial have been moved into registration with the
another double spiral wrapping of paper, after
pointer 38.
which a longitudinal wrapping of a corrugated
relative to the braking or holding means, the cam
30 in moving relative to the cam block 32 causes
tape is applied and ?nally abraided covering of
textile material. The cable in this condition is
then passed through a bath of paint or other
During this movement of the dial
movement of'the lever 23 about its pivot 26, and
therefore varies the position of the roller 20 a
measured distance indicated by the dial at the
pointer from the roller M. The apparatus is now
in condition for operation, which operation may
suitable material and after the cable has been
allowed to dry, it is advanced between the rollers
l4 and 20. In the other form of cable, shown in
the drawing, the chosen group of electrical con 20 be performed in the same manner as previously
ductors with their insulated coverings of selected
described through the advancement of the mate
code colors are served spirally about a pressboard
rial between the rollers.
core which is a strip of ?exible material approxi
The species of the invention shown in Figs. 4
mately 1%" wide. The wires are secured to the
and 5 is identical with that shown in Figs. 1, 2,
core by spiral textile serving, after which a de 25 and 3 with the exception of the handle 39 and
sired number of spiral servings of paper tape are
the braking means including the plunger 4|, the
applied, over which the longitudinal forming of
housing 42, and the other structure embodied
the corrugated tape and the braided textile cov
therein. In place of the housing 40, a plate 60 is
ering are applied. This cable is also passed
?xed to the adjacent side H, by suitable means
through the paint bath and after drying it is in 30 such as screws SI, and supports a pointer 62 posi
readiness to pass between the rollers l4 and I5.
tioned to register with indications 63 and 64 on a
In either instance,- it is desirable that the cable
dial B5. The dial 65 is mounted upon a shaft 66
be reduced in thickness so that its space back of
the switchboard will be no greater than the thick
which supports a cam (not shown) identical with
the cam 30. Associated with the cam, is a struc
ness of the jack strip to which its conductors are 35 ture identical with that shown in Figs. land 2.
It will be understood therefore that variations in
to be connected, These cables, therefore, serve
the position of the dial G5 with respect to its
to connect the terminals of the jack strips of one
switchboard unit to the terminals of a similar
pointer 62 will cause variations in the position of
jack strip of another switchboard unit. As the
a roller such as 20 with respect to a roller such
strand or cable, indicated at 52, is advanced be 40 as l4, for reducing the thickness of a strand or
tween the guide members 53, it will be reduced in
material to a given thickness and therefore to a
thickness, as illustrated in Fig. 2, to the chosen
given width.
dimension.’ It is natural to assume that a cable
The dial 65 is apertured at 61 to receive a mem—
of a given structure when reduced to a chosen
ber 68, the latter having an eccentrically dis
thickness will have a given width as the material 4 posed aperture 69 therein. A rod T0 is disposed
of the cable will ?ow laterally between the rollers
in the aperture and is keyed in place as at ‘H for
to an overall width, depending ?rst upon the
axial movement in the aperture and for connec
quantity of material in the cable, and the dis
tion with the member so that rotation of the rod
tance of the rollers I4 and 20 from'each other.
will cause rotation of the member in its aperture
Therefore, as the material or cable is formed 50 61. A handle or gripping portion 12 is mounted
as it advances between the ?xed roller l4 and
upon the outer end of the rod 10 while the inner
the roller 23, the latter, although variable in this
end has a reduced portion 13 receivable in any
selected one of a multiplicity of grooves 14 in the
instance, remains at a ?xed position under nor
plate 60. Through the aid of a spring 75, the
mal conditions unless there should be an abnor
mal quantity of material at a portion in the
rod ‘:0 is normally urged to the right to force
strand of cable. When such a condition exists,
the end 13 into a selected one of the grooves 14.
the roller .20.,may be moved with the lever 23
t is possible, however, to move the rod through
about the axis of the shaft 26 and against the
the aid of the handle 12 to remove the end 13
force present in the spring 46 until the abnormal,
from any groove 14 in which it is disposed. The
portion in the strand or cable has passed from
grooves or recesses 14 are of like given widths
between the rollers. When this condition occurs,
substantially equal to the diameter of the end
the apparatus will automatically reset itself, the
13 and disposed radially about the shaft -66 so that
roller ZOreturning to the selected position with
their longitudinal center lines Will lie in radial
respect to the roller I4 so that the remainder of _ planes with the indications 63.
the strand or cable will be reduced to the chosen
When a pointer ‘H of a member 18, mounted
dimension. There is no- detrimental disturbance
upon the member 68, is at its zero (0) position
to the cable during its advancement between the
(Fig. 5), dial with its associated mechanism may
rollers l4 and 20. During the initial forming of
be moved to a selected indication 63 by pulling
the cable, particularly the servingof the con
outwardly upon the handle 12 and through the
ductor wires spirally about the pressboard core,
aid of the handle moving the dial to the predeter
the resilient nature of the conductors will tend
mined indication ‘63. By this adjustment, it will
to cause them to project outwardly wherever pos
be known that the rollers are a given distance
sible to create an oval cross-sectional contour for
apart, which distance is the number of one
the cable. The pressure applied to the cable will
hundredths of an inch as indicated by the dial at
move these outwardly projecting portions of the 75 the :pointer._ To vobtain a ?ner adjustment, after
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2,409,670
the selected main indication 63 has been posi
tioned adjacent the pointer 62, the handle may
be rotated to rotate the pointer 11 to register with
any of the indications 80, that is, from the zero
(0) to the nine (9) position to cause the member
68 to continue movement of the‘ dial an addi
tional distance and through a ?ner adjustment
6
movable with the cam and relative to the pointer
to indicate the distance between the rollers, and
means cooperating with the dial to hold the cam
at any selected position relative to the element.
5. A strand forming apparatus comprising a
5
main roller mounted for rotation upon a ?xed
axis, a companion roller, an element to support
which is divided into 1/1000 of an inch, to further
the companion roller, means to support the ele
vary the measured distance of the roller 20 from
ment for movement of the companion roller rel
the roller [4. Thus, with this species of the in 10 ative to the main roller,- a cam actuable to move
vention, the same result may be accomplished as
the element to move the companion roller to
has been described in connection with the species
positions measured distances from the main
shown in Figs. 1 to 3 inclusive, but with a ?ner
roller, whereby a strand advanced between the
adjustment of the position of the roller 25} with
rollers will be reduced to a thickness equaling
respect to the roller [4.
.
15 the distance between the rollers, and means to
Although speci?c improvements of the inven
normally hold the element in engagement with
tion have been shown anddescribed, it will be
the cam.
understood that they are but illustrative and that
6. A strand forming apparatus comprising a
various modi?cations may be made therein with
main roller mounted for rotation upon a ?xed
out departing from the scope and spirit of this 20 axis, a companion roller, an element to support
invention as de?ned by the appended claims.
the companion roller, means to support the ele
What is claimed is:
ment for movement of the companion roller rela
l. A strand forming apparatus comprising a
tive to the main roller, a cam actuable to move
main roller mounted for rotation upon a ?xed
the element to move the companion roller to posi
axis, a companion roller, an element to support 25 tions measured distances from the main roller,
the companion roller, means to support the ele
whereby a strand advanced between the rollers
ment for movement of the companion roller rela
will be reduced to a thickness equaling the dis
tive to the main roller, a cam actuable to move
tances between the rollers, and variable resilient
the element to move the companion roller to po
means to normally urge the element into engage
sitions measured distances from the main roller, 30 ment with the cam.
‘whereby a strand advanced‘between the rollers
7; A strand forming apparatus comprising a
will be reduced to a thickness equaling the dis—
main roller mounted for rotation upon a ?xed
tance between the rollers, and resilient means to
axis, a companion roller mounted upon an axis
normally urge the element to engage the cam.
movable relative to the said ?xed axis, a pointer,
2. A strand forming apparatus comprising a 35 a dial movable relative to the pointer to indicate
main roller mounted for rotation upon a ?xed
in given fractional dimensions the distance be
axis, a companion roller, an element to support
tween the rollers, means operable by the move
the companion roller, means to support the ele
ment of the dial to control the position of the
ment for movement of the companion roller rela
companion roller relative to the main roller, a
tive to the main roller, a cam actuable to move
handle to move the dial, and means under the
the element to move the companion roller to po
control of the handle to latch the dial in any of a
sitions measured distances from the main roller,
plurality of selected positions.
whereby a strand advanced between the rollers
8. A strand forming apparatus comprising a
will be reduced to a thickness equaling the dis
main roller mounted for rotation upon a ?xed
tance between the rollers, and resilient means to 45 axis, a companion roller mounted upon an axis
normally urge the element to engage the cam
movable relative to the said ?xed axis, a pointer,
means to actuate the cam.
a dial movable relative to the pointer to indicate
3. A strand forming apparatus comprising a
in given fractional dimensions the distance be
main roller mounted for rotation upon a ?xed
tween the rollers, means operable by the move
axis, a companion roller, an element to support 50 ment of the dial to control the position of the
the companion roller, means to support the ele
companion roller relative to the main roller, a
ment for movement of the companion roller rela
handle to move the dial, means under the control
tive to the main roller, a cam actuable to move
of the handle to latch the dial in any of a plu
the element to move the companion roller to po
rality of selected positions, and means operable
_ sitions measured distances from the main roller, 55 by movement of the handle relative to the dial to
whereby a strand advanced between the rollers
, further vary the distance of the companion roller
will be reduced to a_ thickness equaling the dis
from the main roller for ?ner fractional dimen
tance between the rollers, a ?xed pointer, and a
sions.
dial movable with the cam and relative to the
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9. A strand forming apparatus comprising a
pointer to indicate the distance between the 60 main roller mounted for rotation on a ?xed axis,
rollers.
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a companion roller, a support therefor movable
4. A strand forming apparatus comprising a
relative to the said ?xed axis, a Variable stop to
main roller mounted for rotation upon a ?xed
limit the movement of the support and the mov
axis, a companion roller, an element to support
able roller to predetermined variable positions
the companion roller, means to support the ele» 65 relative to the main roller, and resilient means to
ment for movement of the companion roller rel
normally urge the support toward and into en
ative to the main roller, a cam actuable to move
gagement with the stop to force the companion
the element to move the companion roller to posi
roller into any selected one of the positions,
tions measured distances from the main roller
whereby a strand advanced between the rollers
whereby a strand advanced between the rollers 70 will be reduced to a thickness equaling the dis
will be reduced to a thickness equaling the dis
tance between the rollers.
tance between the rollers, a ?xed pointer, a dial
WALDEMAR C. EWALDSON.
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