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Патент USA US2120146

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June 7, 1938.
E, w. HALVORSEN ET AL
2,120,146
SPRING WINDING MACHINE
Filed Oct. 29, 1957
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E. w. HALVORSEN El‘ AL
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SPRING WINDING MACHINE
Filed Oct. 29, 1937
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June 7, 1938.
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June 7, 1938.
2,120146
E. W. HALVORSEN El‘ AL
SPRING WINDING MACHINE
Filed Oct. 29, 1937'
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June 7, 1938.
‘
E. w. HALVORSEN ET AL
2,120,146
SPRING WINDING MACHINE
Filed oct. 29, 1937
1:1
1'1
s Sheets-Sheet 5
Patented June 7, 1938
2,120,146
UNITED STATES PATENT OFFICE
2,120,146
SPRING WINDING MACHINE
Elmer W. Halvorsen and Arthur C. Nlgro, Tor
rington, Conn., assignors to The Torrington
Manufacturing Company, Torrington, Conn., a
corporation of Connecticut
Application October, 29, 1937, Serial No. 171,752
23 Claims. (Cl. 153-67)
The present invention relates to spring wind
ing machines of the type adapted to produce what
are commonly known as torsion springs, i. e.,
springs having coiled bodies of different lengths
Ol and diameters, with their projecting ends formed
line 8--8 of Fig. 2, with associated parts shown
in elevation.
Fig. 9 is a. vertical sectional view along the
line 9—-9 of Fig. 2, on an enlarged scale.
Fig. 10 is a view in front elevation, on an en
or bent to suit various purposes for which the
larged scale, of the mechanism for cutting the
springs may be used.
The object of the present invention is to pro
vide a spring winding machine of the above in
10 dicated type, which is characterized by the pro
vision of an improved mechanism for rotatably
driving the spindle on which the springs are
wound, whereby wide variations in the extent of
the winding operation are obtainable, rotation of
15 the spindle being controlled in accordance with
a predetermined cycle which provides ample time
for severing the wire stock following the wind
ing of a coil and for forming the projecting ends
of a spring, as desired. The machine of the
20 present invention further provides for variations
in the pitch of the springs produced and an im
proved mechanism for driving the feed rolls, so
that exactly the right amount of wire will be
fed past the winding spindle, for one end of the
25 spring about to be wound, without interference
with free movement of the stock between the
rolls during the winding operation. The ma
chine also provides improved means for sever
ing the wire, for forming its projecting ends and
wire and forming the end of a spring.
Fig. 11 is a vertical sectional view along the
30 for removing completed springs from the wind;
ing spindle. The above and other advantageous
features of the invention will hereinafter more
fully appear from the following description con
sidered in connection with the accompanying
35 drawings, in which:Fig. l is a view in side elevation of a spring
winding machine embodying the invention.
Fig. 2 is a plan view of the machine shown
in Fig. 1.
40
Fig. 3 is a vertical sectional view, on an en
larged scale, along the line 3—3 of Fig. 1.
Fig. 4 is a fragmentary sectional view on an
enlarged scale, along the line 4-4 of Fig. 1, with
4
associated parts partially in elevation, and par
tially in section.
Fig. 5 is a horizontal sectional view along the
line 5-5 of Fig. 4, looking in the direction of the
arrows.
50
Fig. 6 is a fragmentary view, showing a por
tion of the parts of Fig. 1 in different positions.
Fig. 7 is a fragmentary sectional view along
the line ‘l—‘! of Fig. 2, looking in the direction
of the arrows.
55
Fig. 8 is a fragmentary sectional view along the
line ll-ll of Fig. 10.
,
Fig. 12 is a fragmentary view in front eleva
tion, showing the mechanism for removing a com
10
pleted spring from the arbor.
Fig. 13 is a vertical sectional view along the
line l3—-l3 of Fig. 12, looking in the direction
of the arrows.
Fig. 14 is a fragmentary View, illustrating an
arrangement of gearing for reversing the direc
15
tion of the winding spindle. '
Like reference characters refer to like parts in
the different ?gures.
20
Referring ?rst to Figs. 1 and 2, the machine
consists of a table I, on which is mounted a
spindle head 2 movable on suitable ways 3. A
spindle 4 is rotatably mounted in the head 2,
and is adapted ‘to be driven by gearing 5, so as to 25
have rotative movement imparted thereto in
either direction. A lever 6 is adapted to impart
back and forth movement to the head 2 on the
Ways 3, the gearing 5 and lever 6 being oper
able by mechanisms, hereinafter described.
30
The line of feed for the wire ‘I is indicated by
the arrow in Fig. 2, the wire ‘I being fed by rolls
8 through a guide 9 at right angles to the axis
of the spindle 4. In the formation of a spring,
the wire 1 is ?rst fed between a cylindrical arbor 35
I0 and a pin ll forming part of the spindle 4,
see Fig. 3, and subsequent rotation of the spin
dle 4 causes the wire ‘I to be wound in a coil on
the arbor Ill. The length of the spring thus
wound is determined by the number of revolu 40
tions made by the spindle 4, while the pitch of
the spring is determined by the amount of rec
tilinear movement imparted to the head 2 simul
taneously with rotation of the spindle 4.
A spring S is shown as having been wound on 45
the arbor ill in Fig. 10, and after the winding
operation, the spring is severed from the wire
1 by means of a tool I! cooperating with the
end of the wire guide 9. A second tool l3 coop
erates with the tool l2 in order to form the pro 50
jecting end of the spring just severed, in a man
ner hereinafter described. The completed spring
is then removed from the arbor I0 by a stripping '
?nger l4, after which the spindle 4 is retracted
and comes to rest in a position with the space 55
2,190,146 .
between the arbor ill and pin II in alinement
with the wire guide 8. The rolls 8 then again
feed a predetermined length of wire, to initiate
another cycle of spring winding and forming
operations.
Having thus described the general function and
operation of the essential elements entering into
the production of springs by the machine, there
will next be described, in the order named, (a)
10 the spindle driving mechanism, (b) the pitch
control mechanism, (0) the feed roll mechanism,
(It) the wire cutting and end forming mechanism,
and (e) the spring stripping mechanism.
Spindle driving mechanism
15
As best shown in Fig. 3, the spindle 4 is rotat
ably mounted in bearings i6 provided by the head
2. A bolt i6 extending through the spindle 4
cooperates with a threaded opening l1 in a ta
20 pered extension I 0a. of the winding arbor ill to
the block 3| may be moved between the ways 32
on the arm 33.
The screw 31 is received in a
threaded opening 38 extending through the block
3|, and an unthreaded portion 31a at 'one end
of the screw is supported in an opening pro
vided in a plate 38 secured at the upper end of
the arm 33. The screw 31 is held against longi
tudinal movement in the plate 39 by means of a
collar 40 and a cap 4|, enclosing the end of the
screw. The cap 4| provides a squared tool-re 10
ceiving portion 42, accessible through an open
ing 43 in the table I, so that the screw 31 can
be readily turned to cause shifting of the block
3| on the arm 33, and thereby change the posi
tion of the roller 23 in the raceway 28 of the
segment 23.
As previously pointed-out, the raceway 28 of
the segment 23 extends at an angle to the pivotal » I
axis of the segment, and the angle is such that
the raceway 28_is exactly parallel to the ways 32 20
lock the arbor in position, so that in effect it of the arm 33 when the parts
forms part of the spindle 4. The outside of the of Fig. 1. In this position,
spindle 4 provides elongated teeth I8 in mesh ‘nearest the axis of the cam
with the teeth of a driving gear l9 mounted on a ‘is at one end of its throw,
26 shaft 20 located below the ways 3, on which the
head 2 is moved. Therefore, the spindle 4 and
arbor H) are adapted to be rotatably driven simul
taneously with rectilinear movement of the spin
dle head 2.
The shaft 20 carries a pinion 5’ forming part
30
of the train of gearing 5 shown in Fig. 1, which
terminates in a gear 5"’ mounted on a shaft 2|
below the table I. The shaft 2| carries a pinion
22, which is‘ in mesh with teeth 23a provided at
36 the end of a segment 23 pivotally mounted on a
occupy the position
the cam roll 36 is
26, the segment 23
and the spindle 4
occupies such a position that the space between
the-winding pin II and the winding arbor I0 is in
exact alinement with the wire guide 3. Conse
quently, when the screw 31 is turned to cause
shifting of the block 3| for the purpose of vary
ing the number of revolutions made by the spin 30
dle 4 during one complete revolution of shaft 21,
no movement is imparted to the segment 23, and
the arbor l0 and pin || remain stationary, in
readiness for the feeding of wire at the start of
the operating'cycle of the machine. As long as 35
shaft 24 supported by the machine base 25. The
the raceway 28 remains parallel to the ways 32,
segment 23 is adapted to have a back and forth
movement imparted thereto from a cam 26
mounted on a drive shaft 21, and the invention
such adjustments can be made at will, and the
length of the raceway "is such that the throw
of the segment 23 can be varied to cause the
winding of springs having from one to thirty con 40
40 contemplates an adjustable driving connection
- between the segment 23 and the cam 26. By
this connection, the amplitude of movement of
the segment 23 can be readily varied to so con
trol the degree of rotation of the winding spin
45 dle 4 as to make it possible for the machine op
erator to very accurately determine the number
of convolutions in springs wound on the arbor l0.
As best shown in Figs. 1, 4 and 5, the segment
v23 provides a track or raceway 28, which extends
50 at an angle to the pivotal axis of the segment 23,
for a purpose which will later appear. The track
28 receives a roll 23 mounted on a stud 30 form
ing part of an adjusting block 3|, slidable be
tween ways 32 provided by one face of an arm
55 33, pivotally mounted on a shaft 34 extending
beneath the table I. The free end of the arm
33 carries a stud 35, on which is mounted a roll
36 received in the track 26a of cam 26. 'With
the parts occupying the position of Fig. 1, it is
60 evident that the roll 36 will be nearest the axis
of rotation of‘ the cam 26, and that as the shaft
21 turns through one revolution, ‘the cam roll arm
volutions.
;
Let it now be assumed that the adjusting block
3| has been initially set to produce springs con
taining an intermediate number of convolutions
between the maximum and minimum obtainable, 45
as for example, ?fteen, and it is desired to pro
duce springs having one more coil. It is then
only necessary to turn the shaft 21 so that the
parts occupy the position of Fig. 6, with the cam
roll 36 farthest removed from the axis of the
shaft 21.
The roll 23 on the block 3| has then
swung the segment 23 to the left from the posi
tion of Fig. l,'so that the winding spindle 4 is at
the other extreme of its movement, with a pre
determined number of coils wound on the arbor
Ill. It is obvious that the raceway 28 is then no
longer parallel to the ways 32 on the cam roll
arm 33, so that turning of the adjusting screw
'31 to shift the block 3| away from the pivotal
axis of the segment 23 will actually result in turn 60
ing the segment 23 farther to the left. There
fore, turning the adjusting screw 31 will have the
33 will have an oscillatory movement imparted result of turning the arbor ill, so that the ma
thereto about its pivot shaft 34.- This movement chine operator can actually see another coil
65 of the arm 33 will be transformed into oscillatory formed on the spring, should it be desired to add
movement of the segment 23 about its pivot 24 another turn. When such an adjustment has
through the operation of the roll 29, and the am
been made, as for example to increase the num
plitude of movement of the segment 23 will de ' ber of coils from ?fteen to sixteen, continued op
pend upon the position of the block 3| betwe n eration of the machine will result in the pro—
\
duction of springs with the desired number of
70 the ways 32 on the arm 33.
In order to vary the amplitude of movement of \\ coils, without further adjustment of any other
the segment 23, and consequently the number of parts. By reason of the above described relation
turns through which the spindle 4 is rotated as between the raceway 28 on the segment and the
ways 32 on the cam roll arm, it is possible to
the segment 23 swings in one direction, an ad
75 justing screw 31 is provided, by means of which make basic adjustments to wind more or less 75
3
2,120,140
arbor in will .be returned to its original position
coils in a spring, without turning the arbor w.
‘
and to make minor adjustments to increase the for the formation of the next spring.
In order to vary the amplitude of movement
number of coils on a spring already formed, by
actually turning the arbor to see that the desired‘ of the spindle head 2 and thus control the pitch
of the springs being wound, the pitch cam 55 is
adjustment has been made.
In order to reverse the direction of winding by angularly adjustable about its pivot 56 on the
the arbor it, the gear 5"’ may be turned around slide 51. To this end, the opposite end ofthe
so that itshub will space its teeth from gear 5' slide 5'! carries a bracket 63 secured by screws
on shaft 25, as shown in Fig. 14. A gear‘ 5", ‘54, with a'portion Gila-overhanging the end of
10 with teeth wide enough to meshv with both gears the cam 55, and spaced therefrom, see‘ Fig. 1. 10
The bracket 63 has a center of curvature about
5' and 5"’ is then mounted on a stud so as to
reverse the rotation of the spindle 3, as compared the pivot 55 of the cam 55, and a similarly curved
clamping strip 55 ?ts closely between the over
to Fig. 1.
As previously pointed out, movement of the hanging portion Btaand the upper surface of the
15 spindle head 2, accompanied by rotation of the cam 55. A number of studs 66 are' threaded 15
through the portion 53a andserve to press the
arbor it, will result in the coils of the spring be
ing wound either close together or spaced apart strip 55 against the cam 55, and so clamp it in
in accordance with the degree of such movement, any desired angular position about its pivot 55.
and there will next be described the mechanism
20 for controlling this movement to accurately de
termine the pitch of the springs being wound.
Pitch control mechanism
As previously pointed out, back and forth move
25 ment of the spindle head 2 on the ways 5 is ac;
complished by means of a pitch lever 5,‘ one end
of which is slotted at 54 to embrace a pin 135 car
ried by a block 55, see Fig. 1. The block 55 is
Therefore, the cam 55 provides means for im
parting the desired pitch to springs being wound 20.
on the arbor it, in either direction. Should it be
desired to wind 2, ?at spring with its convolu
tions all lying in the same plane, the cam 55 is
clamped in position with the sides of the track 54
in exact parallelism with the ways 58, on which 25
the pitch slide reciprocates.
By reason of the direct connection of the pitch‘
control slide 57 with the segment 23, axial- move—
mounted on a screw shaft til, extending between
30 a pair of'spaced lugs 68 provided by the spindle
ment of the arbor i0 is synchronized with its ro
tative movement, so that springs will be wound 30
with a uniform pitch for a. given setting of the
the screw shaft 5? to determine the initial posi
tion of the arbor for the start of the coiling oper
35 ation. The block is then clamped in the desiredé
justment of the cam 55 about the axis of rotation
of the axial roll 52 on the pitch lever 6, provides
for a wide range of pitch control. It is also ap
parent that movement of the roll 52 for a given
setting of the cam 55 is substantially multiplied
at the free end of the lever B, so that a very small
movement of the segment 23 and slide 57 can
be translated into a considerably greater axial
movement of the arbor Hi to obtain the necessary
pitch when winding springs of a very small num
head 2, as best shown in Fig. 2. In setting up
the machine, the block ‘35 is adjusted by turning
position by a bolt 539, which tends to draw to
gether split portions of the block 55 upon the
screw shaft 5?. Movement of the spindle head
2 is then entirely dependent upon turning of the
lever 5 to control the pitch of the spring being
wound.
.
'
The opposite end of the pitch lever B is piv
otally supported by a stud 50 carried by a bracket
5! overhanging the table I, the length of the lever
being such that a relatively small angular turn
45
ing movement about the pivot 5|) will result in
a considerable rectilinear movement of the spin—
dle head 2 at the free end of the lever. Turning
movement is imparted to the lever 5 by means
50
55
of a roll 52 carried by a stud 53 intermediate
the ends of the lever B, the roll 52 being received
in a track 56 provided by a pitch cam 55. The
pitch cam 55 underlies the lever S, and as best
shown in the sectioned portion of Fig. 1, is piv
oted at one end on a stud 55 carried by a pitch
control slide 5?.
As best shown in Fig. '7, the slide 51 is slidably
mounted between ways 58 provided by a slotted
base 59, the table I providing a slot 65 through
60 which extends a lug 58, forming part of the slide
51. The lug 5! is connected by a link 82 to the
upper end of the segment 23, as shown in Fig. 1,
so that oscillatory movement of the segment 23
by the cam 25 is converted into reciprocatory
65 movement of the slide 51. When the pitch cam
55 occupies a position in which the cam track
55 extends at an angle to the Ways 58 for the
pitch slide 5?, as shown in Fig. 2, it is evident
that movement of the slide 51 to the left, as
viewed in Fig. 1, will result in the pitch lever B
being turned about its axis to move the spindle
head 2 on its ways 3, and so impart a certain
degree of pitch to the coils being wound on the
arbor I. On movement of the slide 51 to the
75 right of the return swing of the segment 23, the
pitch cam 55.
Furthermore, the angular ad
ber of coils.
,
In the preceding description, reference has
been made to the feeding of wire ‘I by the rolls 45
8 at the start of the spring winding operation,
when the arbor occupies the position of Fig." 3,
and before the segment 23 is moved by the cam
25 to turn the spindle 4. Any such movement of
the feed rolls 8 must be closely timed in the oper
ating cycle, and the mechanism for driving the
feed rolls 8 so that they will frictionally engage
and feed the wire at just the proper time, will
50'
next be described.
55
Feed roll mechanism
As best shown in Fig. 4, the shaft 27 carrying
the cam 25 extends beneath the table I, and
carries at its other end a bevel gear 61 in mesh
with a bevel gear 68 on a shaft 69 extending up 60
wardly through the table I.
The shaft 69 is
connected by bevel gears 10 to a cam shaft ‘H
extending across the table I at right angles to
the drive shaft 2'1, as shown in Fig. 2. The shaft
27 is driven from a suitable source of power, such 65
as an electric motor M, located in the base 25,
as shown in Fig. 1. The motor M is connected
by belts l2 and pulleys T3 to a shaft 14, connected
by gearing ‘E5 to teeth 16 formed on a circular
portion of the cam 25. A lever 17, pivoted at 18, 70
provides an operating portion "a, accessible from
the front of the machine for turning the lever,
and thereby operating a clutching device 19 as
sociated with the pulley 13, as indicated in dotted
lines in Fig. 2. _ Obviously, the shaft 21 carrying 75
4
2,120,140
the cam 28, could be driven directly from any
the stop I88, cooperating with the bracket I 85.
source of power other than the motor, the main
As the shaft 1| rotates, a projection I 88a of the
cam I88 engages the roll II8 to force the plunger
I I3 inside the sleeve I I2, thereby compressing the
spring H4 and tending to turn the bracket I85
about its pivot I88. While the spring I81 resists
turning ‘of the roll bracket, the positive force
under the cam I88 acting through the compressed
spring H4 is sufficient to turn the bracket and
cause the left-hand roll 8, as viewed in Fig. 9, to 10
press against the other roll 8 and so grip the wire
between.
consideration being that the shaft 21 and the
cam shaft 1| be so connected that they rotate
at the same rate of speed.
As best shown in Figs. 2, 8 and 9, the shaft 1I
carries a cam 88, adapted to impart a reciproca
tory movement to a slide 8| connected by a link
82 to an arm 83. The arm 83 is pivotally mount
10 ed on a stud 84, carried by a bracket 85 surround
ing a shaft 88, on which is mounted one of the
feed rolls 8. The arm 83 provides a raceway 81
The cam I88 is so formed and so timed with
in which is received a roll 88 mounted on a stud
respect to the cam 88, that the wire 1 is gripped
between the rolls 8, just before movement of the 15
88 forming part of a block 88. The block 88 is
15 slidable between ways 8| extending longitudinal
ly in a segment 82 pivotally mounted on a stud
slide'8I, acting through the arm 83 and segment
82, imparts rotative movement to the rolls 8.
Therefore, when the rolls 8 rotate in unison in
opposite directions, indicated by the arrows in
Fig. 2, a predetermined length of wire will be fed 20
between the arbor I8 and pin II. The rolls stop
83. The opposite end of the segment 82 provides
teeth 84 in engagement with the teeth of a pinion
85 mounted on the feed roll shaft 88. As best
shown in Fig. 9, the shaft 88 also carries a gear
88 in mesh with a gear 81 mounted on a shaft 88
as the slide 8| comes to rest, whereupon the roll
II8 leaves the cam projection I88a and the roll
carrying the other feed roll 8. Movement of the
segment 82 about its pivot 83 is caused by turning
cam 88. Such movement of the segment 82 is
transformed into rotative movement of the roll
bracket I85 returns to its original position against
the stop I88, with the wire no longer gripped be 25
tween the rolls. The above described feeding of
the wire takes place while the arbor I8 is sta
shaft 88, and the other roll shaft 88 is turned
in unison therewith, in the opposite direction of
tionary, since at that time the roll 38 on the arm
33 is received in a dwell on the winding cam 28,
of the arm 83 about its pivot 84 in response to
reciprooatory movement of the slide 8| by the
rotation by the gears 88 and 81.
,
The degree of rotative movement imparted to
the feed rolls 8 depends upon the amplitude of
the swinging movement of the segment 82, and
such movement is in turn dependent upon the
position of the block 88 in the raceway 81. In
order to shift the block 88‘, a screw shaft 88 is
received in a threaded opening I88 in the block
88, with an unthreaded portion 88a turnable in
a plate I8I at the end of the ways 8|. The shaft
88 is held against axial movement by a collar I82
and an enlarged head I83 providing a squared
tool receiving portion I84. By turning the shaft
88, the block 88 can be shifted to vary the throw
. of the segment 82 for a given amount of turning
movement of the arm 83 by the cam 88. Thus,
the feeding of wire 1 by the rolls 8 can be closely
controlled, so as to determine the length of wire
that is fed past the arbor to provide one end por
tion of the spring that is subsequently wound by
rotation of the arbor I8.
I
As best shown in Fig. 9, the shaft 88 carrying
the left-hand feed roll 8, is mounted in a bracket
I85 pivoted at I88, so that the left-hand roll is
capable of movement toward or away from the
stationary axis of the right-hand roll 8. A spring
I81 connected at its ends to the bracket I85 and
to a fixed part of the machine, serves to yielding
ly maintain the bracket I85 against an adjust
able stop I88, so that normally the rolls 8 are not
in gripping engagement with the wire 1, and the
wire may pass freely therebetween during the
winding operation.
.
In order to cause the rolls 8 to engage the wir
with su?lcient pressure for feeding, the shaft 1|
carries a cam I88, with which cooperates a roll
II8 yieldingly mounted on an arm I I I of the roll
bracket I85. The arm carries a sleeve I I2, within
which is received a plunger II3, with the roll “8
rotatably mounted at the end of the plunger,
70 which extends through the sleeve II 2. A spring
‘II4 serves to yieldably maintain the plunger “3
in the position shown, wherein the roll II 8 is
just out of engagement with the peripheral por
tion of the cam I88. This normal position of
75 r the roll H8 is determined by the adjustment of
as shown in Fig. 1. Thus, the feed of the stock 30
takes place at the start of the winding cycle, and
the rolls 8 have released the wire by the time
the segment 23 starts to move and thus impart
rotative movement to the winding spindle 4. Aft
er the wire has passed between the released rolls 35
8 during the winding operation, the segment 82
is returned by the cam 88 to its'starting position,
but the rotation of the non-engaged rolls 8 has
no effect on the wire 1, due to the provison of a
pair of check rolls II5, which will rotate only in
the direction in which the rolls 8 turn for feeding.
As previously pointed out, rotation of the arbor
I8 in one direction, results in winding a spring
with a, predetermined number of convolutions
and of a given pitch, after which the arbor comes 45
to rest, due to another dwell on the winding cam
28. 'While the arbor I8 thus remains stationary,
the tool I2 severs the completed spring from the
wire where it leaves the guide 8, after which the
tools I2 and I3 cooperate to bend the projecting 50
end ‘of the completed spring by mechanism which
will next be described.
.
Wire severing and end forming mechanism
As best shown in \Figs. 10 and“ 11, the wire 55
guide 8 extends through a holder I I8 supported
by a bracket II8a, which also provides vertical
guideways II1 for a pair of tool slides H8 and
H8, mounted above and below the guide 8. The
slides provide seats II8a‘ and “811 for receiving 60
springs I28, bearing on a portion of the bracket
I I8, so that each slide is yieldingly held away from
the guide 8. A lever I2I pivoted {at I22 has one
end bearing on the upper surface of the slide I I8,
while its other end carries a roll I23 yieldingly 65
maintained in engagement with the periphery of
a cam I24 by the pressure of the spring I28. A
lever I25, pivoted at I28, similarly co-operates
with the lower surface of slide II8, with a roll
1| beside the cam I24.
I
70
The lower slide II8 carries the cutting tool I2,
while the upper slide II8 carries the forming tool
I3, and normally, the tools I2 and I3 remain in
the retracted positions of Fig. 11, while a spring
S is wound on the arbor I8.__in the manner pre
75
5
2,120,146
viously described. When the arbor I0 comes to
rest with a spring wound thereon, the wire ex
tends from the arbor I0 into the guide 9, be
tween the tools I2 and I3. Continued rotation
of the cam shaft ‘II, with the spring winding and
wire feeding instrumentalities at rest, then causes
the cams I28 and I24 to move the tools I2 and I3
into the dotted line position of Fig. 11.
As the slides H8 and H3 move toward the
wire ‘I, the offset portion of the forming tool I3
engages the wire at a point between the wound
spring S and the end of the guide 9, as the up
wardly moving cutting edge of the lower tool I2
severs the wire at the guide 9. This severs the
15 spring from the wire stock and continued upward
movement of the cutting tool I2 results in the
projecting end portion of the spring engaged by
the tools being bent around the offset portion of
the then stationary forming tool I 3. The cams
20 I24 and I28 then permit the slides H9 and H9
to be moved away from the wire guide 9 by the
springs I20, thereby retracting the tools I2 and
I3, and leaving a completed spring S on the ar
bor I0 with one end formed, as indicated. Ob
viously, other types of cutting and forming tools
may be employed, without departing from the in
vention; for example, the tool slides H8 and
H9 may be replaced by a multiple tool forming
head surrounding the wire guide 9, such as is
30 shown and described in the 'copending application
of Charles R. Bergevin, Serial No. 171,120, ?led
October 26, 1937. The completed spring is now
ready to be moved from the arbor I0 by a strip
ping mechanism, which will next be described.
35
Spring strz'ppring mechanism
As best shown in Figs. 12 and 13, the stripping
?nger I4 is mounted at the end of an arm I29,
40
head 2 is moved to return the pin II to the po
sition which it occupies at the start of the wind
ing operation.
Operation and adjustment of the machine
Having described the various mechanisms en
tering into the machine, its operating cycle will be
brie?y described,- with reference to the form of the 10
cam 26 of Fig. 1.
Assuming that the cam roll
36 occupies the position shown the arbor I0 is then
at rest, with the space between the winding pin
I I and the arbor I04exactly in line with wire guide
9; Rotation of the drive shaft 21, and with it the 15
cam shaft 'II,'then causes the rolls 8 to imme
diately grip the then stationary wire, and feed
a predetermined length of wire past the arbor.
The arbor remains at rest during this feeding, due
to the dwell on the cam 26, at the start of the cy
20
cle. After vthe wire has been fed, ‘turning of the
segment 23 serves to rotate the arbor I0, accom- ‘
panied by rectilinear movement of the spindle
head 2, thereby winding a spring on the arbor,
having a predetermined number of convolutions
and a given pitch. These operations occur while
the segment 23 moves from the position of Fig. 1
to the position of Fig. 6.
25'
‘
At the end of the winding operation, the arbor
I0 comes to rest, due to a second dwell on the
cam 29, whereupon the cams I24 and I20 op
erate the tools I2 and I3 to cause the wire to be
severed at the guide 9, and to cause the end of the
spring to be formed. After the severance of a
completed spring, the segment 23 moves in the
opposite direction, thereby returning the spindle
head 2 to its original position, and turning the
arbor I0 in the opposite direction to the starting
pivoted at I30 on a slide I3I movable in horizontal
position, reversal of the arbor I0 being accom
ways I32 provided by a bracket I33. The strip
panied by operation of the stripping ?nger I4 to 40
remove the completed spring from the arbor III.
This completes the operating cycle, leaving the
per arm I29 provides an extension I34 below the
pivot I30, to which is connected one end of an
operating link I35, having its other end connect
ed to a lever I36. The lower end of the lever I 36
is pivoted at I31, and a spring I39, connected at
its ends to the lever I36 and to the bracket I33,
serves to maintain the lever I36 in engagement
with a roll I39 on a multiplying lever I40.
The
lever I40 is pivoted at MI. and carries a roll I42
between the roll I39 and its pivot I4I. The pull
50
of the spring I38 serves to maintain the roll I42
in engagement with a cam I43 mounted on the
shaft ‘II.
With the parts occupying the position of Fig. 12,
55
of the spring is accompanied by movement of the
arbor I0 in the same direction, as the spindle ~
the link I35 exerts a thrust on the extension I34
of the stripper arm I29, so as to turn the arm
parts in position for. the commencement of an
other cycle.
As previously pointed out, the number of con 45
volutions wound in a spring can be varied
through a Wide range, by turning the screw 31
to shift the block 3I, with the parts occupying
the position of Fig. 1, wherein the raceway 28
is parallel to the ways 32. If, ‘after winding 50
springs having a given number of convolutions
it is desired to increase the length of thesprings,
_ such adjustment can be quickly made by mov
ing the parts to the position of Fig. 6, wherein
turning of the screw 31 will result in convolu
tions being added to the spring already wound,
55
I29 about its pivot I30, and thereby maintain within the view of the machine operator. Vari
the stripping ?nger I4 in a raised position en
ations in the pitch of the springs being wound
tirely clear of a spring being wound on the arbor are readily obtained by adjusting the angle of
the pitch cam 55, with respect to the line of 60
60 Ill. The cam I43 is so timed that after a spring
has been wound on the arbor I0 and severed from movement of the slide 51. In order to vary the
the wire at the guide 9, a projection I43a engages amount of wire fed by the rolls 8, to provide for
the roll I42 and turns both levers I40 and I36 one end of the spring that is to be wound, the
to the left, as viewed in Fig. 12. When this oc ' screw shaft 99 is turned to shift the block 90.
curs, the pull of the link I35 ?rst turns the arm Movement of the block 90 varies the radius at
I29 so that it extends substantially parallel to which turning movement is imparted to the seg
the arbor I0, with the ?nger I4 engaging the com-1 ment 92 for a given movement of the slide 8I by
pleted spring on the arbor. An adjustable stop the cam 80, whereby very accurate control of the
I44 carried by the slide I3 I , limits turning move
amount of wire fed by the rolls 8 is obtained.
ment of the arm I29, so that after the arm I29
70
We claim,
engages the stop I44, further movement of the
1. In a machine of the class described a rotat
link I35 bypthe lever I36, results in movement able winding arbor, a drive shaft carrying a
of the slide I3I to the left. This causes quick re
moval of the completed spring from the arbor I0
75 by the stripping ?nger I4, even though movement
cam, a gear member for rotating said arbor and
an adjustable connection between said cam and
gear member for imparting oscillatory move 75
6
2,120,146
said arbor for a given throw imparted to said
arm by said cam, adjustment of said connection,
when said guideways are non-parallel and when
said arm is farthest from the axis of rotation
of said cam, serving to also impart angular
.m'ovement to said arbor.
9. In a machine of the class described, a frame,
ment thereto and causing said arbor to make a
predetermined number of revolutions in either
direction of rotation for each revolution of said
drive shaft.
2. In a machine of the class described a rotat
able winding arbor, a drive shaft carrying a cam,
a gear member for rotating said arbor, a piv
oted arm actuated by said cam and an adjust
able connection between said arm and gear mem
10 ber for imparting a predetermined degree of os
cillatory movement to said gear member.
3. In a machine of the class described a rotat
able winding arbor, a drive shaft carrying a
cam, a gear member for rotating said arbor, a
15 pivoted arm actuated by said cam, a connection
between said arm and gear member for impart
ing oscillatory movement to said gear member
and means for adjusting said connection to cause
said arbor to make a predetermined number of
20 revolutions in either direction of rotation for
each revolution of said cam.
4. In a machine of the class described a rotat
able winding arbor, a drive shaft carrying a cam,
a gear member for rotating said arbor, a pivoted
arm actuated by said cam, a connection between
said arm and said gear member for imparting
oscillatory movement to said gear member and
means operable without moving said arbor for
adjusting said connection to vary the humber
30 of revolutions made by said arbor for one revo
lution of said cam.
'
5. In a machine of the class described a rotat
able winding arbor, a drive shaft carrying a cam,
a gear member for rotating said arbor, a piv
35 oted arm actuated by said earn, a connection be
tween said arm and said gear member for im
parting oscillatory movement to said gear mem
ber and means operable in one position of said
cam for adjusting said connection to vary the
40 number of revolutions made by said arbor for
one revolution of said cam, said adjustment be-‘
ing accomplished without imparting rotative
movement to said arbor.
6. In a machine of the class described a ro
45 tatable winding arbor, a drive shaft carrying a
cam, a gear member for rotating said arbor pro- '
viding a guideway, a pivoted arm actuated by
said cam also providing a guideway, a.connec
tion between said arm and gear member mov
50 able in both guideways and means for adjust
ing said connection to vary the number of revo
lutions made by said arbor for a given throw im
parted to said arm by said cam.
_
'7. In a machine of, the class described a rotat
winding arbor, a drive shaft carrying a cam,
55 aable
gear member for rotating said arbor providing
a guideway, a pivoted arm actuated by said cam
also providing a guideway, a connection between
said arm and gear member movable in both
r60 guideways and means for adjusting said con
nection to vary the number of revolutions made
by said arbor for a given throw imparted to said
arm by said cam, adjustment of said connec
tion, when said guideways are in parallel rela
tion and said arm is nearest the axis of rotation
of said cam, being obtainable in the absence of
angular movement of said arbor.
,
8. In a machine of the class described a rotat
able winding arbor, a drive shaft carrying a cam,
\.
a head movable on said frame, a winding arbor
‘,rotatably mounted on said'head, a drive shaft,
a gear member for rotating said arbor, a con
nection between said drive shaft and said gear
member for imparting a predetermined degree of
oscillatory movement to said gear member, a le
ver for imparting rectilinear movement to said
arbor head and a connection between said gear 15
member and said lever, whereby axial movement
is imparted to said arbor simultaneously with its
rotative movement.
10. In a machine of the class described, a
frame, a head movable on said frame, a winding 20
arbor rotatably mounted on said head, a drive
shaft, a gear member for rotating said arbor,
a connection between said drive shaft and said
gear member for imparting a predetermined de
gree of oscillatory movement to said gear mem 25
ber, a lever for imparting rectilinear movement
to said arbor head and an adjustable connec
tion between said gear member and said arbor
head actuating lever for controlling the amount
of movement imparted to said arbor head for a 30
predetermined degree of rotative movement im
parted to said arbor by the movement of said
gear member.
11. In a machine of the class described, a
frame, a head movable on said frame, a wind
ing arbor rotatably mounted on said head, a drive
shaft, a gear member for rotating said arbor, a
connection between said drive shaft and said
gear member for imparting a predetermined de
gree of oscillatory movement to said gear mem 40
ber, a lever for imparting rectilinear movement
to said arbor head, a reciprocatory slide con
nected to said gear member and an adjustable
connection between said slide and said arbor head
actuating lever to control the degree of pivotal 45
movement of said lever for a given amount of
movement of said slide by said gear member.
12. In a machine of the class described, a
frame, a head movable on said frame, a winding
arbor rotatably mounted on said head, a drive 50
shaft. a gear member for rotating said arbor, a
connection between said drive shaft and said gear
member for imparting a predetermined degree of
oscillatory movement to said gear member, a le
ver for imparting rectilinear movement to said 65
arbor head, a reciprocatory slide connected to
said gear member, a track angularly adjustable
on said slide and a connection between said ar
bor head actuating lever and said- track for con
verting movement of said slide into pivotal move
ment of said lever to an extent determined by the
setting of said track.
13. In a machine of the class described, a
frame, a head movable on said frame, a winding
arbor rotatably mounted on said head, a drive
shaft, a gear member for rotating said arbor, a
connection between said drive shaft and said gear
member for imparting a predetermined degree
of oscillatory movement to said gear member, a
a gear member for rotating said arbor providing ' lever for imparting rectilinear movement to said 70
a guideway, a pivoted arm actuated by said cam arbor head, a reciprocatory slide connected to
also providing a guideway, a connection between said gear member and a connection between said
said arm and gear member movable in both slide and said arbor head actuating lever located
guideways and means for adjusting said connec- ‘ nearer the pivotal axis of said lever than the
tion to vary the number of revolutions made by point of connection of said lever to said head. 76
7
2,120, 148
14, In a machine of the class described, a
viii. In a machine of the class described, a ro
frame, a head movable on said frame, a winding tatable winding arbor, means for feeding stock
arbor rotatably mounted on said head, a drive - past said arbor when the latter is stationary,
. shaft, a gear member for rotating said arbor, a means for imparting rotative movement to said
connection between said drive shaft and said arbor for winding a length of stock thereon in
gear member for imparting a predetermined de
the form of _ a spring, said feeding means being
gree of oscillatory movement to said gear mem
displaced from the winding axis with a straight
ber, a lever for imparting rectilinear movement length of stock extending from a spring wound
to said‘ arbor head, a, connection between said on said arbor, tools operable in a vertical plane
10 gear member and said arbor head actuating lever at right angles to the line of stock feed and means 10
for converting oscillatory movement of said gear
member into rectilinear movement of said head
for operating said tools after a spring has been
and an adjustable ‘connection between said head
and said lever to determine the initial position of
gage said straight length of stock and then cause
the other tool to sever said stock and- bend the
free end of the spring still on said arbor aroun 15
15 said head and arbor. _
,
15. In a machine of the class described, a wind
wound on said arbor to cause one tool to first en
said ?rst tool.
‘
ing arbor, means for imparting intermittent ro
tative movement to said arbor, a pair of rolls
for receiving stock extending in the direction of
20 said arbor, a gear member for imparting rota
tive movement to said rolls, a pivoted arm for
imparting oscillatory movement to said gear
member and an adjustable connection between
said arm and said gear member for controlling
25 the amount of stock fed past said arbor by ro
tation of said rolls.
16. In a machine of the class described, a pair
of rotatably mounted rolls, one of which is yield
ingly supported to permit stock to pass freely be
30 tween said rolls, means for ‘imparting rotative
movement to the other of said rolls, means for
20. In a'machine of the class described, a ro
tatable winding arbor, means for feeding stock
causing the ?rst-named roll to frictionally engage
stripper normally maintained out of engagement
said stock prior to rotative movement of the
other roll in one direction of rotation to cause
feeding of said stock and means for releasing
with a spring on said arbor, means for ?rst im
said first-named roll from the stock in advance
of rotative movement of the other roll in the op
posite direction of rotation.
17. In a machine of the class described, a pair
40 of rotatably mounted rolls, one of which is yield
ingly supported to permit'stock to pass freely
between said rolls, means for imparting rotative
movement to the other of said rolls, means for
causing the first-named roll to friotionally en
45 gage said stock prior to rotative movement of the
past said arbor, means for rotating said arbor to
wind said stock thereon in the form of a spring,
means for severing a spring from said stock, a
stripper normally maintained out of engagement
with a spring on said arbor and means for im
parting a combined pivotal and rectilinear move
ment to said stripper to engage a spring on said
arbor and remove it therefrom.
21. In a machine of the class described, a ro
tatable winding arbor, means for feeding stock
past said arbor, means for rotating said arbor
to wind said stock thereon in the form of a spring,
means for severing a spring from said stock, a
parting a-pivotal movement to said stripper to
engage it with the end of a spring on said arbor
and means for next imparting a longitudinal
movement to said stripper to cause it to remove
said spring from the arbor.
‘
22. In a machine of the class described, a wind
ing arbor, a pair of rolls for receiving stock ex
tending in the direction of said arbor, means for
imparting intermittent rotative movement to said
arbor, in one direction, to cause it to wind said
stock into a coil, means for imparting intermittent
rotative movement to said rolls to feed said stock
other roll in one direction ‘of rotation to cause past said arbor in the intervals between success
, feeding of said stock, means for releasing said sive stock winding movements thereof, and means
for varying the degree of rotative movement of
?rst-named roll from the stock in advance of ro
tative movement of the other roll in the opposite said rolls to control the amount of stock fed past
direction of rotation and means for checking, said arbor by rotation of said rolls.
23. In a machine of the class described, awind
movement of the stock in a direction opposite to‘
ing arbor, a pair of rolls for receiving stock ex
its movement of feeding.
'
g
_
tending in the direction of said arbor, said rolls
18. In a machine of the class described, a ro
tatable winding arbor, means for feeding stock being normally free of said stock, means for im
55 past said~arbor when the latter is stationary, parting intermittent rotative movement to said
means for imparting rotative movement to said arbor, in one direction, to cause it to wind said
arbor for winding a length of stock thereon in stuck into a coil, means for frictionally engaging
the form of a spring, said feeding means being said rolls with said stock_ and rotating said rolls
displaced from the winding axis with a straight to feed a length of stock past said arbor when
length of stock extending from a spring wound the latter is stationary, and ‘means for varying
on said arbor, tools operable in a vertical plane the degree of rotative movement of said rolls to
at right angles to the line of stock feed and means control the amount of stock fed past said arbor
for operating said tools after a spring has been by rotation of said rolls.
‘
wound on said arbor to sever said straight length
of stock and bend the end of the spring still on
said arbor.
mm W. HALVORBIN'.
ARTHUR C. MORO
ll
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