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Патент USA US2406530

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Aug- 27,1946-
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_c. oysnuss'ru-z
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‘2,406,530
SAFETY DEVICE FOR STRANDERS
Filed May 19,1945
,2 Sheets-Sheetl
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INVENTOR
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CARL O. BRUESTLE
58%. m4“
Aug- 27, 1946-
c. o; BRUESTLE
2,406,530‘ '
SAFETY DEVICE FOR STRANDERS
Filed'May 19, 1945
2 Sheets-Sheet 2
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INVENTon
CARL o BRQJESTLE
BY
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ATTO
NEYS .
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Patented Aug. 27‘, 1946
‘2,406,530 ; *
"UNITED *STATES PATENT ' orrlce ‘ 7’
SAFETY DEVICE FOR STRANDERS
Carl 0. Brues'tle, Rahway, vN. J., assignor to
Syncro Machine Company, Perth Amboy, N. J .,
a corporation of New Jersey
,_ Application May 19, 1945, Serial No. 594,757’
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_ This invention relates to, improvements in
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in elevation the front end of a typical stranding
stranding or cablingv machines with special refer
machine of which a supporting girder or struc
.ence to a ‘safety, device controlled by the indi
vidual strands being formedinto- a cable for stop
ture I is a part. Mounted upon this structure
by means‘of bearings and rollers or other suit
‘ping the machine when one or vvmore strands OI able supports 3 is a large disc-like member 2 cen
trally of which is secured a shaft 3 to the end of
A more speci?c object of therinvention is the
which, not shown, power to effect rotation there
provision of a safety device for stranding“ or‘ of is applied in any suitable manner. The shaft
breaks
or
runs
out.
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cabling machines comprising an electrical switch
for each strand having a contact member con
trolled by it.
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A more detailed object of they invention is the
provision in such a safety device of means for
renderingit inoperative when desired.
Other and more detailed objects of the inven 15
tion will be apparent from the following disclo
sure of one embodiment thereof as illustrated in
the attached drawings.
7
,
4' has an axial passage through which a central
strand or core ‘C may be fed‘ longitudinally to
the die position D. Attached to, the end of the
shaft 4 is the lay plate 5 which has a series of
guides or eyepieces 6 mounted therein through
which ‘the strands W to be twisted around the core
C are guided to the die position.
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The forward portion of the guide tube for one
of the strands is shown at 1 while the forward '
.
portion ‘of the cradle for one of the other strands
W is shown at 8. The construction of this por
bination, construction, arrangement and relative 20 tion-of the machine is of special importance with '
This invention resides substantially in the com
location of parts as will be described in detatil
below.
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relationto the subject matter of this invention
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and may take any of the forms that are known in
the art of which the one illustrated is a well
In the accompanying drawings— 7
Figure 1 is a side elevational view of the front
known type. The strands pass through passages
end of a strand or section with some parts broken 25 9 in the supporting disc 2 so as'to deliver the
‘away;
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strands W to the control devices which form the
Figure 2 is a vertical, central, cross-sectional
subject matter of this invention. '
view through one of the safety devices of this in
vention;
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The contro1 devices are arranged around the
'
Figure 3 is a cross-sectional view, taken on the ,
line 3-3 of Figure 2; and
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lie in pairs at diametrically opp'ositepositions.
‘Thus it is possible to twist one or more pairs of
Figure 4 is a side elevational view of the‘struc
ture of Figure 3.
disc 2 on its forward face, as illustrated, so asto
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‘In the operation of stranding and cabling ma
chines, it is desirable to have some form of safety
device actuated when one or more of the strands
being formed into a cable breaks or runs out to
automatically stop the machine for the purpose
of repairing the break or substituting a fresh
package of strand material.
While it is not of special importance in rela
tion to this invention, it is noted that stranding
strandsW about. the core‘..C. At this point‘ it
may be noted that ‘it is not necessary, as will be
appreciated by those skilled in the art, to have a
core wire C since one or more pairs of strands
W may be twisted into spiral relationship at the
die station D without the use of a core strand.
The safety device itself is clearly illustrated in
Figures 2, 3 and 4. Each device consists of a base
40 plate III which is attached in the opening 9 to the
forward face of the disc .2 by means of cap screws
l I. The guiding and protecting tube 1 telescopes
into a central aperture in the supporting plate ID,
as clearly shown in Figure 2». Mounted in any
' a cable as represented, for example by a stranded 45 suitable manner on the plate I0 is an insulated
wire cable or a plurality of twisted insulated con
bushing l2 in which an electrical contact I3 is
ductors. It will be seen from the following dis
. mounted so as to be insulated from the machine.
Attached on or formed integral with the plate ID
closure that the subject matter of this invention
are a pair of parallel arms M in the ends of which
is applicable to the control of various forms of
machines for feeding wires, tapes, ribbons, 50 is attached a shaft upon which the guide wheel I5
is rotatably mounted and over which the strand
strands, or the like to detect breakage thereof or
W passes from the tube 1. Attached to the plate
their running out and when desired upon detec
In in any suitable manner so as to lie between
tion to e?ect stoppage of the machine.
Referring to the drawings, there is illustrated 55 the parallel arms I4 is a small bracket IE on which
and cabling machines are adapted to twist two
or morebare or insulated wires, respectively, into
is rotatably mounted an S-shaped contact mem¢
2,406,530
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event the contact arms l‘! are shifted to a position
where they may be locked in inoperative position
'ber I1 'formed from arod or wire of a suitable '
metal. The contact is proportioned so that it may
pivot on the supporting plate I6 into contact with
7 in the slotted arm 20. They will thus not inter
fere with the operation of the machine in twist
the?xed contact I3. A coil spring l8. encircles
ing four pairs of wires.
the pivotally mounted portion of the contact I‘!
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Electrically it will be seen that the contact arm n
I j and is biased so as to normally urge it into en.
.l_ 11 is-grounded on the machine ‘forming one side of
gagement with .thecontact l3. This bias results
from the fact that one end of the spring "lies
against the support l6 and a longer end 18' en-'
,the ‘circuit to be controlled by the saiety device
'The'leads, not shown, for the insulated contacts
10' l3 will be extended to a slip ring, not shown, in
gages the contact l1. The strand W is fed
sulated from the machine by means of which the
through the upper loop of the Contact II, as clear
other control circuit wire is connected through av
71y illustrated in the drawings, so that when the I fixed insulated brush, not shown. It is, of course,
strand is under normal feeding tension it will
apparent that the'control circuit may be used for
hold the contact I‘! in the position shown in‘Fig; '
any number‘ of‘ purposes as, for example, to op
ure 2 against the resistance of thebiasing springf',_15 erate
a signal device or suitably constructed
I8 tending to move it in a counterclockwise direc
switcheswfor shutting off the power which operates
tion (Figure 2) into engagement'with- the ‘?xed
the entire machine so that if a strand is broken it
contact
l3.
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"can be repaired or if it has run out its supply '_ ,
' The S-shaped contact I‘! has its lower leg eit
reel can be replenished, '
tended, as shown in Figure 3, so that it may be slid
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to those? skilled in the‘art‘that the’is'ubj‘ect mat‘
line position shown in Figure l3'to the'dotted'im
sition in the same ?gure; A collar l9ris secured
' ter~of this ~ invention; is capable of "somevariation
without departure from thel scope thereofiand i‘.
do not,’ therefore,‘ desire" to" bejlimited other than‘
as required by the appendedclai'ms. Q‘
to the extended armof'thecontact so ‘as ‘to-lie
against'the pivotal support when thecontact is
.
' From ‘the ‘above‘description it will be apparent
transversely 'in‘its ‘pivotal~ supportjfrom the full
25
tlius'shifted. Attached to or'formingpartgof'the
- What is v‘claimed is t " ,
support I 6 ' is" an ' arm ?'2 ll‘ vhaving ‘a. slot! extending
lying the‘ slot ‘as is best‘ seen from ‘Figures? and ‘4.
' 1‘. In astrand feed'ng‘machine, the‘combina
tion-including a guidemember vover ‘which the
' When .the contact I‘! is in-full line position itmay
sulated electrical contactmounted-adjacent said
inwardly from its upper facei'and‘ an car 21 over
pivot in its ‘support ‘under the ends of the spring
i8. ‘On the other han'djwhen it is shifted to the
do'tted'line position shown in ‘Figure 3"it' lies in
strand‘ is'fed in the direction-of its length, an in—
" guide member, and a'movablecontact arm biased
towards engagenientVWith'jsaid?xed contact and
positioned adjacent the path of‘ travel ‘0f’, the
the slot‘ in"the_'arm M20 and when'moved behind
‘strand to said'guide member was tobe'engaged '
the ear 2| isheldi‘by'gth'e springjla in a slotted
position out of‘, engagementjwith" the contact l3,
as clearly shown by the‘righthandd'otted position
bythelstrand and held- against-its‘bias out ofen
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gag-ement - with the ?xed ’ contact; whereby ‘upon
breakage or running out-of the-strand the mov
v of Figure 2.
said- mov
The‘ normalop'eration of this device-is already ' j able {contact engages-fthe?xedrcontact,
beingetransversely shiftableand 'a
clear from the ‘descriptionjabove; 'Whenj’in'use‘ 40 ablecontact
locking member forming a" seat 'therefor into
the strand‘W holds .thecontact'arm l1‘ out ‘of en
gagement with vthe contact 13 either until it‘ is
broken or runs out whereupon spring "[8 'move's'it
into engagement with the contact l3.“ '
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which it may be shifted transversely.
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2. In a strand» feeding’v machine?as_'top ‘motion
switch comprising‘ anin‘sulatede electrical {contact
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mounted adjacent the path- of travel of tlreistrand,
:Since a stranding machine" of‘‘ this .typefis 45Y a movable contact arm, means forlpivotallygand
adapted ‘to'handle‘any number‘of p'airs'of strands v'slid'ably
supporting ‘said contact arm'so-as to be
within its capacityjit' willv be desirable'frequently
' 'engag'edlb'y the strand, resilient means for'lbiasing
when ‘using 'a lesser “number ‘of ~pairs‘ ‘than the
maximum capacity of'the machine'tobe able to
render the control device 11 ‘inoperativejAs'sume
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‘ing for ‘descriptive purposes that" the machine is
ing a lockrfor holding said arm ‘out 3of'eng'ageé
ment with said contactwhenshifted into ‘engage
vcapable of handling eight pairs'o'f strands and ‘it
merit therewith, said resilient means ‘serving-to
is ‘desired to twist a cable having ‘only ‘four pairs
" of strands, it‘is apparent ‘that every'other safety
device ‘must be rendered ‘inoperative: "In that
‘said arm into engagement with said contact-"when
the strand breaks orgruns out, and‘ means-form
' hold said arm in said seat. -
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CARL v“0,. "BRéUl-iisTLiE.
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