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Патент USA US3091285

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May 28, 1963
c. R. MENTZER
CRIMPING MACHINE
Filed Jan. 27, 1960
3,091,275
'‘
e Sheets-Sheet 1
INVENTOR.
CHARLES R. HENuER
May 28, 1963
c. R. MENTZER
3,091,275
CRIMPING MACHINE
Filed Jan. 27, 1960
s Sheets-Sheet 2
INVENTOR.
CHARLES R. NENTZER
May 28, 1963
c. R. MENTZER
3,091,275
CRIMPING MACHINE
Filed Jan. 27. 1960
55
a6
6 Sheets-Sheet 3
56
e3
61+
63
= ——
. .
1
e4
4
INVENTOR.
E
. 1;“
CHARLES R. NENTZER
May 28, 1963
c. R. MENTZER
3,091,275
CRIMPING MACHINE
Filed Jan. 27, 1960
6 Sheets-Sheet 4
INVENTOR.
CHARLES R. NENTZER
BY
mtymwim
May 28, 1963
3,091,275
C. R. MENTZER
CRIMPING MACHINE
6 Sheets-Sheet 5
Filed Jan. 2'7, 1960
n
XLIi
23*
V
INVENTOR.
CHARLES R. MENTZER
BY
M‘W MM
May 28, 1963
c. R. MENTZER
3,091,275
CRIMPING MACHINE
Filed Jan. 27, 1960
6 Sheets-Sheet 6
51v
INVENTOR.
Camus RMENTZER
$391,275
Patented May 28, 1963
2
FIGURES 5 and 6 are views similar to FIGURE 4 but
3,091,275
CRIMPING MACIWE
Charles R. Mentzer, Harrisburg, Pa., assignor to
All/1P Incorporated, Harrisburg, Pa.
Filed Jan. 27, 1960, Ser. No. 5,044
5 Claims. (Cl. 153-1)
showing the progressive stages of the crimping cycle and
illustrating the movement of the parts during the cycle;
FIGURES 7, 8, 9 and 10 are frontal views of the crimp
ing die and the bending arms and illustrating the relative
positions of these parts during the crimping cycle;
FIGURE 11 is a frontal view showing the feed mecha
nism and the crimping area;
FIGURE 11A is a view taken along the line 11-41 of
nectors or terminals onto the ends of wires.
An object of the invention is to provide an improved 10 FIGURE 11;
FIGURE 12 is a view taken along the line 12-—12 of
apparatus for feeding a succession of terminals or con
FIGURE 11;
nectors to a crimping station and crimping the leading.
FIGURE 13 is a perspective view showing the strip
connector onto a wire. A further object is to provide a
This invention relates to machines for crimping con
crimping apparatus having an improved wire stripping
and positioning means.
A still further object is to pro 15
vide a crimping apparatus which is particularly adapted
to apply relatively small connectors onto extremely small
diameter conductors. A still further object is to provide
an improved apparatus for crimping open-U type con
nectors and having means for bending the sides of the
connector inwardly and for subsequently crimping the
connector by application of a compressive force to the in
wardly bent sides.
shearing means and the wire shearing means;
FIGURE 14 is a fragmentary perspective view showing
the actuating linkage for the two shearing means; and
FIGURE 15 is a view taken along the lines 15-~15 of
FIGURE 5.
The disclosed embodiment of the invention is adapted
to crimp connectors in strip form as shown in in FIGURE
2 onto the ends of wires. The strip of FIGURE 2 com
prises a tape of plastic material 86, such as Mylar (poly
ethyleneterephthalate) to which connectors 88 are at
tached, as by an adhesive, at regularly spaced intervals.
These and other objects are achieved in a preferred em
bodiment of the invention comprising a bell crank lever 25 The particular connector disclosed is a simple trough-like
pivoted at its apex and having a crimping die secured to
the end of one of its arms. The other arm of the bell
crank has a resilient connection with a reciprocable rod so
that as the rod moves in a ?rst direction, the crimping die
open-U terminal having one of its sidewalls relatively high
er than the other sidewall and is particularly intended to
join an extremely ?ne (e.g. 0.002" diameter) coil wire
to a ‘lead wire which is relatively much 'heavier. In use,
is moved relatively towards a ?xed crimping anvil. 30 the two wires are placed within the connector and the
sidewalls are ‘folded over each other and crimped.
Mounted on each side of the bell crank by means of a
Thereafter, the plastic tape is cut and, in the case of con
lost motion connection are a pair of levers having bending
nections between coil wires and lead wires, the tape is
arms on their ends. These bending arms, upon arrival
positioned against the coil. The cut section of tape with
at the crimping die, are adapted to move relatively to
wards each other thereby to bend the upstanding side 35 the crimped connection thereon is then secured to the
coil by means of an additional piece of adhesive tape.
walls of a U-shaped connector inwardly and to fold these
The preferred embodiment of the invention ‘is mounted
sidewalls over a wire disposed within the connector. The
in a frame comp-rising a base 2 having a pair of parallel
bending arms of these levers then move apart and the
spaced apart webs or ?anges 4, 6 which support a top
crimping die descends and applies a compressive force to
the connector to complete the crimping operation. The
preferred embodiment is adapted to feed and to crimp
connectors in strip form and to this end provides a feed
ing means actuated by the above mentioned reciproca‘ole
plate 8. This top plate does not rest directly on the
‘tops ‘of the webs but is hinged thereto as shown at '10 and
is resiliently urged downwardly in the front portion of
the machine against a stop 14 by means of a coil spring
‘12. It will be understood that a counterpart hinge to the
rod so that a single connector, the leading connector of 45
hinge 10 is provided on the opposite side of the machine
a strip, is fed to the crimping anvil during each cycle of
operation. In order to shear this leading connector from
the strip and to trim the wire portion which extends be
yond the connector after crimping, there ‘are provided
from the side shown in FIGURE 1. Top plate 8 is cut
away [as shown at 16 and a bell crank 18 is positioned in
this cut away ‘section and between the webs 4, 6. This
shears movable in planes adjacent the crimping anvil and 50 bell crank is pivotally mounted at its apex on a pin 20
which is supported by ears 22 which extend from a sup
actuated by the Ieciprocable rod which actuates the bell
port
block 24 (FIGURE 3) contained between ‘and se
crank. ‘In order to strip the end of the wire there are pro
cured to the webs 4, 6.
vided a pair of abrasive wheels adjacent the crimping
A ?rst arm 26 of the bell crank has a crimping die 28
anvil so that when the operator positions the Wire in the
secured
to its end and a second arm 30 has an enlarged
uncrimped terminal with its end extending beyond the 55
end 32 through which passes ‘a rod extension 33 of a
connector, the end is caught in these wheels and the in
piston rod 34 which, in turn, extends from a pneumatic
snlation removed therefrom. The operator can then
piston cylinder 36. The end of arm 36 of the bell crank is
withdraw a portion of the wire from the wheels so that
held between a bar 38 'on piston rod extension 33 and a
a stripped section thereof rests within the connector and
‘40. This washer is resiliently biased against bar
this stripped section is crimped and held by the connector. 60 washer
38 by means of a coil spring 42, on the end of the rod
In the drawing:
extension which is retained in place by 1a nut '44. This
FIGURE 1 is a perspective view of a preferred embodi
arrangement permits the rod 34 and extension 33 .to move
ment of the invention;
rightwardly during a portion of its stroke independently
FIGURE Q is a perspective view showing a strip of
of bell crank arm 30 ‘as is explained below. In order
connectors and showing a crimped connector on the ends 65
to prevent rightward or counterclockwise movement of
of a pair of wires;
the :arm 3% beyond the desired point, there is provided a
FIGURE 3 is a perspective view showing a bell crank
stop 46 on the base 2 which is adjustably clamped by
lever and a crimping means thereon and the pneumatic
means of a fastener 43 extending through the :base and
piston-cylinder which actuates the bell crank which forms
into a threaded opening in the stop block. An adjusting
70 screw 50 extends through the front plate of the appara
part of the preferred embodiment;
FIGURE 4 is a sectional view showing the preferred
tus and into ‘a threaded opening in the stop block 46. This
embodiment at the beginning of a crimping cycle;
3,091,275
‘
'
3
adjusting screw is threaded through the front plate at 52
so that upon loosening of fastener 48 and rotation of screw
52, the stop can be adjusted towards and away from the
front of the apparatus thereby to vary the stroke of the
bell crank.
A pair of bending arms 56 are disposed ‘on each side
of crimping die :28 and are secured at their upper ends
to the ends of levers 58. These levers are clamped inter
mediate their ends against flat surfaces 62 on the opposite
sides of the bell crank by means of spring washers 63
and a bolt 64 which extends through circular openings in
the levers and an arcuate slot 66 in the bell crank. This
arrangement permits 'aboth relative motion oat the bell
crank with respect to the levers and movement of thebell
4
at 98 on a pin which in turn is mounted in front of plate
54. The other arm 1% of the bell crank is normally
biased downwardly in FIGURE 11 by means of a coil
spring 102 secured at its end to the base of the machine
fname. The apex of the bell crank provides a flat face
to ‘which is secured a leaf spring 104, the end of which
is engaged by a cm 166 mounted rotatably on a pin 133
extending from the base 2 of the frame. As shown in
FIGURE 12, upon clockwise movement of this cam
1%, the end of the leaf spring 194 will be moved left
wardly in FIGURE 11 resulting in clock-wise motion
of the bell crank ‘0n pivotal axis 98. This motion im
parts a rightward movement to feed ?nger 90 to feed
the strip of terminals rightwardly towards the crimping
crank independently of the levers. The levers additionally 15 anvil. Cam M96 is actuated by means of a bar 110 secured
‘are pivotally mounted on pin 20 and have end portions
61 which extend rearwardly beyond the bell crank and
are secured to a block 60 so that they move in unison.
A stop 68, which is adapted to contact block 60 and pre
to an extension 112 on the previously mentioned bar 33.
It will thus be apparent that upon motion of the piston
rod towards the front of the ‘apparatus and leftwardly in
FIGURE 4, the cam 106 will be rotated in a clockwise
vent counterclockwise motion of the levers beyond a pre 20 direction and this will cause clockwise movement of
determined point, is supported by means of a U-shaped
the bell crank and rightward movement of the feed ?nger.
bracket 70 which is secured to the webs 4, 6 of the
On the return stroke of the piston rod 34, spring 102 is
(frame. An additional stop 72 is provided to prevent
effective to cause counterclockwise motion ‘of the bell
clockwise motion of the levers beyond a predetermined
point and this stop is engaged by an adjustable screw 73 25 crank and retract the feed ?nger so that it will be posi
tioned behind the next adjacent terminal on the strip to
which extends through block 69. Stop 72 in turn is sup
feed this next terminal to the crimping anvil at the end
ported on a cross bar 74 which is secured to the support
of the forward stroke.
block 24.
The length of the stroke of the feed ?nger can be ad
As best shown in FIGURE 7, the bending arms extend
justed
by means of stop screws 113 threaded through the
parallel to the sides of the crimping die and are inwardly 30
opposite sides of channel 114. As shown best in FIG
directed at 80. These arms normally extend beyond the
URE 11A, bell crank arm 96 comes to rest against these
crimping die and have lower parallel extensions 81 in
stops at the limits of its stroke in both directions. It
wardly curved ‘at their tips :as shown at 32 and having
should be added that the leaf spring 104 on the bell crank
heels v3.3 to limit their movement towards each other.
In use, these arms are required to move relatively towards 35 renders it unnecessary to adjust the position of cam 106
when the stroke is changed. If this cam overtravels
each other during counterclockwise motion ‘of the bell
(continues to rotate after the edge of the bell crank arm
crank in order to :bend the sidewalls of the terminal in
comes to rest against the righthand stop 113 in FIGURE
wardly. To this end the levers themselves have a re
11A), the leaf spring will merely be resiliently stressed
silient bias inwardly towards the bell crank but are held
in the positions shown in FIGURE 7 by virtue of screws 40 to a slight extent.
It is desirable to provide some type of hold down de
78 in the levers which bear against the opposite sides of
vice for lightly pressing the strip of terminals into the
the crimping die. Recesses 76, which ‘function as cam
channel shaped feed path on the upper face of the front
ming surfaces, are provided on the sides of the crimping
plate
54. To this end, there is provided an L-shaped
Edie which are opposed to the levers. As the bell crank
rotates, block 60 contacts stop 68 and further movement 45 bracket 120 secured to channel 114 and having a leaf
spring 122 on its end which extends downwardly toward
of the levers and bending arms towards the anvil is pre
the terminal feed path and parallel to the path as shown
vented. Thereafter, the bell crank continues to move in
in FIGURE 11.
a counterclockwise direction as viewed in FIGURE 4
A shear, for shearing the strip of plastic material 86 V
and the crimping die moves downwardly towards the
interval relative to the levers. During this dwell of the 50 at a point adjacent the crimping anvil, is provided in the
form of a shear blade 124 having an opening in its end
through which the strip is adapted to pass. This shear
FIGURES 7 and 8, and the ends 81 of the bending arms
blade extends through a slot in the front plate and is
also move inwardly towards each other to bend the side
mounted on a slide member 126 which is held against
walls of the terminal towards each other. Upon further
movement of the crimping die, the bending arms are 55 a bracket 128 on the front plate of the frame, the face
1of the front plate being recessed for the accommodation
cammed apart by the cam surfaces 76 of the crimping die
of this slide. The slide is reciprocated by means of a
so that crimping die can be pressed against the terminal
lever 130 (FIGURE 14) which in turn is secured to a
to complete the crimp. It will be understood that the
rod 134 extending parallel to, and in back of, the front
levers 58 should be clamped by the spring washers 63
against the ?at surfaces 62 ‘on the bell crank with su?‘i— 60 plate. Rod 134 has a clamping block 136 on its end
which is slotted at 138 for the reception of the ?attened
cient force to ensure the movement of the levers and the
end 140 of a control rod 142 to rwhich it is pivotally con
bell crank as a unit during the initial stages of the stroke,
nected. Control rod 142 is slidably supported in bearing
however, the clamping pressure should not be unduly
blocks 144 on the outside surface of web‘ 4 to permit mo
high in order to permit the relative motion, shown in
FIGURES 7-10, between the levers and the bell crank. 65 tion'parallel to the motion of the piston rod 34. Rod
142 is retracted during the last portion of the rightward
Referring now to FIGURES 1, 11 and 12, the feed
stroke of the piston rod as viewed in FIGURE 4 by
mechanism for feeding the terminal strip comprises a
levers, the screws 78 move into recesses 76 as shown in
feed ?nger 90 which is adapted to push the strip from
means of an arm or extension 145 on plate 38-.
This
plate engages a collar 147 secured to the rod 142 and
a source (not speci?cally shown) along a channel 84
on the upper edge of the front plate 54 of the machine 70 pushes it rightwardly, during the ?nal stages of the
frame. This ?nger is pivoted at 92 to one arm 96 of
a bell crank lever and has a torsion spring 94 ?tted into
a slot in its base which normally biases the ?nger in a
clockwise direction as viewed in FIGURE 11. The bell
stroke, against the compression of a spring 149 interposed
between the one bearing block 144 and the collar 147. It
will be appreciated that only a very slight amount of
movement of this rod is needed to actuate the shear 124.
Advantageously, means are provided to trim the por
crank to which the ?nger is attached is pivotally mounted 75 tion of the wire which extends beyond the terminal after
3,091,275
it has been crimped. In the preferred embodiment such
means is provided in the form of a wire shear 152 which
extends through a slot in the front plate and is dis
posed within the recess in the front plate. This wire shear
is secured at its end to a hub 152 pivotally mounted on
6.
within the terminal and the operator actuates the pneu
matic piston cylinder. Thereafter, the piston rod moves
rightwardly as viewed in FIGURE 4 and the bell crank
is rotated in a counterclockwise direction. The bending
arms move downwardly and then inwardly as the se
quence of operation shown in FIGURES 7-9 is followed
a pin 153 and has an arm 154- extending downwardly
and the upstanding sidewalls of the terminal are ‘bent par
therefrom and lleftwardly as viewed in 13. This arm is
tially inwardly towards each other. After this inward
slotted at its end ‘for the accommodation of a cam fol
bending of the sidewalls, the arms move outwardly again
lower 156 which is adapted to be engaged by a cam 15%
on blade holder 126. A leaf spring ‘16% mounted on 10 and the crimping die presses the terminal against the anvil
to ?rmly set these sidewalls and secure the terminal onto
support 129 normally biases ~arm 154 in a clockwise di
the wire end. After the terminal has ‘been crimped, and
rection as viewed in FIGURE 13 but permits counter
the end of the bell crank has come to rest against stop 46,
clockwise motion of the arm. Thus, upon downward
the piston rod 34 continues to move rightwardly and is
motion of the blade holder 126, hub 152 is rotated
in a counterclockwise direction against the force of spring 15 permitted to .do so by virtue of the resilient coupling 42,
4%) ‘between the arm of the bell crank and the piston rod.
160 and the shearing edge of the blade 1‘52 passes rela
During this ?nal portion of the rightward stroke, the rod
tively downwardly into the slot through which it ex
142 is moved rightwardly thereby to actuate the Wire
tends and severs the end of the wire.
shear and the strip shear. During this period the wire
Extremely ?ne wires on which the instant machine
will be held by the abrasive wheels so that it can be
is adapted to operate are frequently coated with a varnish
sheared in a precise location relative to the strip. After
type insulation which must be removed in the vicinity
the piston rod 34 reaches the end of its rightward stroke
of the crimp, and these wires ‘are difficult to position
it immediately returns and causes the bell crank to rotate
within the terminal, particularly if the terminal is rela
in a clockwise direction thus raising the crimping and the
tively small as in the instant circumstances. In order to
both strip and position the wire, there is provided a pair 25 bending arms. During this reverse stroke, the stop 72 is
effective to prevent movement of the levers 61, 58 beyond
of stripping wheels 162, 164 in front of the bell crank
a predetermined position and the crimping die moves rela
and directly behind the anvil portion of the channel 84.
These stripping wheels are mounted on the ends of
tively upwardly with respect to the pins 76 (FIGURE 7).
As a result the bending arms and the crimping die at the
shafts 166, 168 which are rotatably supported in blocks
170, 172. Block 170 is pivoted at its rearward end 30 end of the stroke are positioned in a relative position
shown in FIGURE 7. During the ?nal portion of the
to block 172 and the two blocks are held apart as shown
vforward
stroke of the ram, cam- 106 (FIGURE 12) is
in FIGURE 1 by the wheels themselves. Thus as the
rotated as described above to feed the next adjacent ter
wheels progressively wear down in use, the block 17%
minal up to the crimping anvil area of the front plate.
moves downwardly relative to the block 172 to maintain
The salient overall advantage of the invention is that it
the spacing between the wheels. It should be added at 35
this point that the purpose of providing a hinged mount
ing for the upper plate 8 is to permit adjustment of
this plate so that the wheels will be positioned with
their line [of tangency in the plane of the crimping anvil.
A pulley 176 on the end of shaft 168 is connected by
is particularly adapted to crimp extremely small connec
tors onto the ends of extremely ?ne wires which can not
be handled by the heretofore known types of crimping
devices. Several features of the invention contribute to
the ability ‘of this preferred embodiment to handle such
wires. As mentioned above, the abrasive Wheels hold
means of a belt 178 to the pulley 18% on the end of a
the wire so that it can ‘be precisely positioned relative to
shaft extending from a motor 182 so that these wheels
the terminal, an operation which would otherwise be
are continuously rotated during use. It will be apparent
extremely di?icult because of the delicacy of the wires
that the upper one of the wheels is turned only by virtue
of its frictional contact with the lower wheel although 45 and the small size of the uncrimped ‘connectors. The
preferred embodiment is also adapated to feed and to
if desired, a direct drive for both of these stripping wheels
shear terminals of the particular type shown in FIGURE
can be provided.
2 which are extremely small and are secured to a plastic
The stripping wheels 162, 164- may be of any desired
strip. The shearing means operates while the terminal
type suitable for the wire being used. ‘One type of strip
ping wheel which is particularly adapted for extremely
?ne wire is composed of a plurality of ?bre glass discs,
each disc being made up of a plurality of radially extend
ing strands. Stripping wheels of this type will remove all
of the varnish type insulation on an extremely ?ne wire
is clamped securely by the crimping die and the crimping
ram on the end of the bell crank provides means to bend
the sides of the terminal inwardly as well as to crimp the
sides after they have been partially bent together. It
will be appreciated that the extremely small terminals re
quired for ?ne wires can not be bent inwardly and down
wardly by a single die as is common practice with termi
nals for larger sized wires.
Changes in construction will occur to those skilled in
with a relatively larger diameter lead wire in a terminal.
the art and various apparently different modi?cations and
To accomplish this, the operator ?rst inserts the end of
the fine wire over the anvil portion of the front plate until 60 embodiments may be made without departing from the
scope of the invention. The matter set forth in the fore
its end is engaged by the stripping wheels. These wheels
going description and accompanying drawings is offered
tend to draw the wire inwardly of the machine and in
by way of illustration only. The actual scope of the in
doing so will remove the varnish type insulation. It is
vention is intended to he de?ned in the following claims
necessary for the operator to feed a length of ?ne wire
suf?cient to extend from ‘the line of tangency of the wheels 65 when viewed in their proper perspective against the prior
art.
to the terminal positioned on the anvil. After this length
I claim:
of wire has been drawn between the wheels, the operator
1. Apparatus for crimping open-U type electrical ter
withdraws the ?ne wire by pulling on it until a stripped
minals in strip form onto wires, said apparatus compris
portion is positioned over the uncrimped terminal on the
anvil. It is an advantage that during the entire operation 70 ing. an anvil, means for feeding a succession of terminals
in strip form to said anvil, a bell crank pivotally mounted
this extremely ?ne wire is held taut by the wheels thereby
without damaging the wire itself.
In use, the operator will generally wish to strip the end
of an extremely ?ne wire and crimp this ?ne wire along
facilitating the operation of positioning it relatively over
the uncrimped terminal. After the wire has been stripped
and positioned over the terminal in this manner, the sec
at its apex, at crimping die on ‘one arm of said bell crank
whereby upon rotary motion of said bell crank said crimp
ing die is moved relatively towards and away from said
ond wire, usually a larger diameter lead wire, is positioned 75 anvil, a strip shearing blade disposed adjacent said anvil
3,091,275
7
and movable in a plane extending transversely of the plane
of said strip and past said strip at a location between the
leading terminal of said strip on said anvil and the next
adjacent terminal to sever said leading terminal from said
strip, actuating linkage for said blade, a reciprocable rod,
lost motion means for engaging said rod with said actu
ating linkage during the terminal portion of the stroke of
8
terminal feed means and said rod for actuating said ter
minal feed means during return movement of said rod
in a direction opposite to said ?rst direction.
4. Crimping apparatus for crimping open-U type con
nectors comprising, a ?xed anvil, a crimping die movable
relatively towards and away from said anvil, a pair of
bending arms disposed on opposite sides of said crimp
said rod in one direction, a resilient connection between
ing die and having tip portions normally extending be
said rod and the other arm of said ‘bell crank, and a stop
yond said die towards said anvil, portions of said arms
vfor said bell crank arm to prevent movement thereof 10 being held frictionally ‘against the sides of said crimping
after crimping of said- terminal whereby, upon movement
die whereby said arms are normally movable with said
of said rod in said one direction said bell crank is ?rst
die but said die is movable relative to said arms when
rotated to crimp said terminal, and said strip shearing
said arms are held against movement, said arms being
blade is then actuated while said crimping die dwells to
resiliently biased inwardly towards said die, stop means
sever said strip.
15 ‘for preventing movement of said arms during a terminal
2. Apparatus ‘for crimping open-U type terminals in
portion of the stroke of said die towards said anvil, and
strip form comprising, a bell crank pivotally mounted
camming means acting between said die and said arms,
at its apex, a crimping die mounted on one arm of said
said camming means functioning to permit said arms to
lbell crank, a ?xed crimping anvil {or cooperation with
move by virtue of their resilient tendencies, relatively
said crimping die, means for vfeeding a succession of 20 inwardly and their tips to move relatively towards each
terminals in strip form to said anvil, a shear disposed
other during said terminal portion of said stroke, and said
adjacent said anvil for shearing the leading terminal from
camming means causing said arms subsequently to move
said strip, a reciprocable rod, said rod being resiliently
apart whereby, during said stroke, said bending arms
coupled to the other arm of said bell crank whereby
bend the sidewalls of said terminal inwardly, and said
upon movement of said rod in a ?rst direction, said bell 25 crimping die thereafter bends said sidewalls downwardly
crank is rotated and said crimping die is moved rela
Ito crimp said terminal onto a wire.
tively towards said anvil, a stop for said bell crank to
5. Crimping apparatus for crimping open-U type ‘con
prevent movement of said crimping die beyond a pre
nectors comprising, a ?xed anvil, 'a crimping die movable
determined position relative to said anvil while per
relatively towards and away from said anvil, a pair of
mitting continued movement of said rod in said ?rst di 30 bending arms carried by, and ‘disposed on opposite sides
rection after said bell crank has come to rest against
of, said crimping die, said die being movable relative
said stop, and means acting between said terminal ‘feed
to said arms upon application of a holding force to said
ing means and said rod for actuating said terminal feed
arms, said arms normally extending beyond said crimp
means ‘during return movement of said rod in a direction
opposite to said ?rst direction.
3. Apparatus for crimping open-U type terminals in
strip form comprising a bell crank pivotally mounted
at its apex, a crimping die mounted on one arm of said
ing die and being resiliently biased inwardly towards said
35 die, means for applying a :holding force to said arms
during a terminal portion of the stroke of said die to
wards said anvil, and cam means for permitting said arms
to move inwardly towards each other and for subse
bell crank, a ?xed crimping anvil ‘for cooperation with
quently moving said arms apart during said terminal
said crimping die, means for vfeeding a succession of 40 portion of said stroke whereby said bending arms in
terminals in strip ‘form to said anvil, a strip shear dis
wardly bend the sidewalls of a terminal positioned on
posed adjacent said anvil ifor shearing the leading ter
said anvil and said die thereafter bends said arms down
minal from said strip, a Wire shear disposed adjacent
wardly over the base of said terminal.
said anvil for shearing excess wire extending from said
45
terminal, a reciprocable rod, said rod being resiliently
References Cited in the ?le of this patent
coupled to the other arm of said bell crank whereby
UNITED STATES PATENTS
upon movement of said rod in a ?rst direction, said bell
1,960,788
Maroto _____________ __ May 29, 1934
crank is rotated and said crimping die is moved rela
2,255,510
Martindell __________ __ Sept. 9, 1941
tively towards said anvil, a stop ‘for said bell crank to
Andren ______________ __ Feb. 1, 1944
prevent movement of said crimping die beyond a pre— 50 2,340,448
2,366,269
Lawson ______________ __ Jan. 2, 1945
determined position relative to said anvil While per
2,436,806
Hunt _______________ __ Mar. 2, 1948
mitting continued movement of said rod in said ?rst
2,705,797
Handel ______________ __ Apr. 12, 1955
direction, means acting between said rod and both of
2,736,358
Burge ______________ __ Feb, 28, 1956
said shears 'for actuating said shears during movement of 55
said rod in a ?rst direction after said bell crank has come
to rest against said stop, and means acting between said
2,774,130
2,783,813
2,854,874
Folkenroth ___________ .._ Dec. 18, 1956
Duks ________________ __ Mar. 5, 1957
Decker ______________ __ Oct. 7, 1958
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