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Патент USA US2105933

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Jan. 18, 1938.
F. c. SPENCER
" 2,105,933
.DEVICE FOR ATTACHING MEMBERS
' Filed Nov. 18, 1956
Patented Jan. 18, 1938
2,105,933
UNITED STATES PATENT OFFICE>
2,105,933
DEVICE FOR ATTAOHING MEMBERS
Frank C. Spencer, Westfield, N. J., assignor to
Western Electric Company, Incorporated, New
York, N. Y., a corporation of New York
Application November 18, 1936, Serial No. 111,382
6 Claims. lol. 287-20)
This invention relates to devices for attaching is disclosed in the above referred to patent, and
members, and more particularly to a device for forms no part of this invention, only such parts
locking tubular flyer arms to driving heads of thereof are illustrated which are necessary to a
full understanding of the present application of
strand twisting machines of the general type dis
.5- closed in the H. H. C. Grondahl Patent 1,263,405 the invention. Referring to the drawing, a ro- 5
tatable bracket or driving head is indicated at I0,
of April 23, 1918.
Objects of this invention are to provide an ehi
cient and practical device for attaching to its sup
port a tubular machine element subjected to great
lo centrifugal stresses during motion.
In accordance with the above objects, the in
vention in one embodiment thereof as applied to
the attaching of tubular flyer arms to driving
heads of strand twisting machines of the afore
mentioned type, contemplates a device wherein a
supporting bracket fixed to the driving head is
formed with a recess to receive half the cross
section of the tubular arm and a clamping plate
also recessed to receive the other half of the arm
(j, are provided with aligned similar channels »in
their opposed recessed faces extending at right
angles to and intersecting the recesses.
Entered
in the end of the arm is a hollow block having
diametrically opposed grooves or peripheral
9;, channels aligned with the channels in the bracket
and clamping plate, the aligned channels receiv
ing locking pins. In locking the parts, the hollow
block is fitted in the end of the tubular arm which
is then laid in the bracket recess with a locking
30 pin in its channel. Thereafter the recessed
clamping plate with a locking pin in its channel
is laid over the arm and fastening screws are
driven home which serve to defiect opposite wall
portions of the tubular arm into the channels of
gr, the block by the interposed locking pins, thus se
curely locking the arm to its supporting bracket
and plate.
>Other objects and advantages of this invention
will more fully appear from the following detailed
40 description, taken in connection with the ac
companying drawing, wherein
Fig. 1 is a central vertical section of an attach
ing device embodying the features of this inven
tion, the parts being shown in locked relation;
45
Fig. 2 is a similar `view showing the parts in
position ready to be locked together;
Y
Fig. 3 is a fragmentary sectional view taken on
the line 3-3 of Fig. 1, and
Fig. 4 is a fragmentary elevational view of Fig.
5o l looking toward the right and downwardly on a
line perpendicular to the face of the bracket.
In the drawing the invention is shown as appli
cable to a strand twisting machine such as is used
in the manufacture of telephone cable. Since the
55 twisting machine is of a well-known type, such as
which carries a plurality of tubular yoke or flyer
arms II, the head and arms being shown frag
mentarily. Since the driving head Ill and the
flyer arms II carried thereby are rotated at a lo
high rate of speed in the operation of strand
twisting, the arms will consequently be subjected
to great centrifugal stresses tending to pull away
from their points of support on the driving head.
The flyer arms I I, only one of which isy shown, are 35'
securely locked to the driving head It by an at
taching device comprising a split bracket, indi
cated at I2 and I3, the part I3 acting as a clamp
ing plate in the final locking of the elements to
gether. Each bracket part is provided with a re
cess I4 for receiving half the cross section of the
tubular iiyer arm II, which in the present in
stance, as shown in Figs. 3 and 4, is larger in cross
section in one direction than the other. The
bracket part I2 is formed with an arm which is
I,
attached to the head iû by screws I‘I and the 20
clamping plate I3 is secured to the part I2 by
screws I8.
Within the end of the tubular liyer arm II,
which is locked to the bracket part I2, is fitted a
hollow block or plug I9 having a slight taper from
its upper end to its lower end, as viewed in Figs. 1,
2 and 4, the lower end having a snug fit in the
arm, and the upper end is only enough larger that
it will have a tight lit when driven into the tubu- r
lar member. Preferably the lower end of the 3"
block I9 is bifurcated as shown (Fig. 4). The
member I9 is provided with a strand passage 2i]
suitably shaped throughout its length to permit ,
the twisted strands to pass therethrough without
deleterious friction.
Formed in the block I9 are
diametrically opposed peripheral channels or
grooves 2|, of arcuate shaped contour, which ex
tend transversely thereof, and at right angles to
the bracket recesses I4.
The bracket parts I2
_
and I3 are provided upon their inner faces with
channels 24 of circular contour and aligned with
the channels 2| of the block IS, the channels 24
intersecting the recesses I4 of the bracket parts.
The channels provide open grooves in the recesses 50
and terminate in drilled holes extending to the
exterior of the bracket parts I2 and I3. Tightly
fitted in each of the channels 24 is a locking key
or pin 25 which projects for substantially one
half of its length and cross-sectional area into 65
2
2,105,933
the recess I4, as clearly shown in Figs'. 1 and 2,
due to the channel 24 intersecting the recess I4.
Referring to Fig. 2, it will be apparent that upon
the clamping plate I 3 of the bracket being drawn
Ul
into position against the bracket part I2 by
tightening the screws I8 that the locking pins 25
will deñect inwardly opposite portions 26 of the
wall of the tubular flyer arm, II, theY deflected
portions being pressed into thechannels 2| of the
10 block I9 which serves as a die or anvil to shape
the wall portions about the locking pins.
channels in the members having locking pins
entered therein and abutting the periphery of
the tube, and means for clamping the members
together to cause said locking pins to deform the
wall of the tube into the channels of said means
to firmly attach the tube to the members.
3. A device for locking a tube to a two part
support, comprising a hollowplug having spaced
peripheral transverse channels iitted in the tube,
the support parts having recesses cooperating 10
, to receive the tube therein and transverse chan
To lock the tubular flyer arm II to the split
bracket, the hollow tapered block I9may be ñrst
nels intersecting the recesses and aligned with
the> channels in said plug, locking pins in the
fitted in the end of the arm With the channels 2I
channels in the support parts, said pins abutting
predeterminedly positioned relative thereto and y the periphery òf the tube, and means for clamp 15
the arm is then positioned in the recess I4 of the . ing the support parts together to cause said lock
bracket part I2 (Fig. 2), the channel 24 thereof
being aligned with the channel 2I of the block
I9 which carries a locking pin 25. The recessed
clamping plate I3 carrying a locking pin 25 in its
channel 24 is then laid over the arm II and the
fastening screws I8 are driven home. As -the
screws I8 are threaded intoV the bracket part I2
the locking pins 25 are pressed against the op
posite wall portions 25 of the arm yII which por
tions are deformed and deñected into the chan
nels 2I of they block I9 and when fully deflected,
as shown in Fig. 1, serve to- securely lock the
arm II to its supporting split bracket.y It will
30 be obvious in the particular application of the
invention that the deñected VWall portions 26 of
the arm II which are locked to the split bracket
and extend at right angles to the direction of the
clamping action of the plate I3, which clamps
the arm between the bracket parts I2 and I3,
will provide a maximum resistance to centrifugal
Y stresses'set- up tending to pull the arm away from
the bracket.
Although the invention herein described and
„ illustrated is particularly well adapted for= use in
strand twisting machines, it will be understood
that the invention is capable of many other
modifications and applications and is to be lim
ited only by the scope of the appended claims.
What is claimed is:
Y
`
1. A device for attaching-a tube to supporting
members, comprising means having spaced peri
pheral transverse channels ñtted within the tube,
the members having recesses cooperating to re
50 ceive the tube therein andtransverse channels
intersecting the recesses and aligned with the
channels in said means, the channels in the
members having locking means entered therein
abutting the periphery of the tube, and means
55 for clamping the members together to cause said
locking means to deform the Wall of the tube
into the channels `cf said means to ñrmly attach
the tube to the members.
2. A device for attaching a tube to supporting
60 members, comprising means'having diametrically
ing pins to deiiect the wall of the tube into the
channels of said plug to iirmly lock the tube to
' the support.
4.
A device for locking flyer arms of oblong 20
tubular cross-section to a driving two part sup
port, comprising a hollow wedge fitting the inner
periphery of the tubular flyer arm, said wedge
having diametrically opposed transverse chan
nels formed in its longer outer peripheral sides, 25
the support parts having recesses cooperating to
receive the flyer arm therein and transverse
channels intersecting the recesses and aligned
with the channels in saidf wedge, locking> pins
ñtted in the channels of the support parts. and 30
abutting the periphery of the flyer arm, and
means for drawing and retaining the support
parts together to cause said locking pins to de
ñect the wall of the tubular flyer arm into. the
channels of said- wedge to firmly lock. the tubular I
flyer arm to the driving support.
5; A device for attaching a hollow member toI
supporting members, comprising means having a.
transverse channel ñtted within the hollow mem,
ber, the supporting members having recesses co
operating to receive the hollow member therein,
one of the supporting members having a trans
verse channel intersecting the recess ther-eo!> op
posite the channel'in said means, the channelin
the supporting member having locking means 45
entered therein, and means for clamping the sup
porting members together to cause said' locking
means to deform the wall of the hollow member
into the channel of said means ñtted in the hol
low member to ñrmly attach the latter member 50
to the supporting members.
6. A device for locking a. hollow member to a
two part support, comprising a plug having a
transverseV channel iitted within the member;
the support parts havingv recesses cooperating 55
to receive the member therein, one of the sup
port parts having a transverse channel inter
secting the recessthereof opposite the channel
in said plug, a locking pin in the channeliof the
opposite peripheral transverse channels fitted
support part, and means-for clampingA the sup 60
port parts together to 'cause said pin to, deflect
within the tube, the members having recesses co
the wall of the member into the channel voiîf‘said
operating to receive the tubeY therein and- trans
plug to firmly lock the member to the support.,
verse channels intersecting the recesses and
65 Aaligned with the channels in said means, the
FRANK C. SPENCER’.
65
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