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Патент USA US3047054

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July 31, 1962
3,047,042
H. ESCH
CRIMPING APPARATUS
Filed Oct. 21, 1958
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3,047,042
Patented July 31, 1962
1
2
pression of the connector with which he is working will
3,047,042
.
result.
CB‘JG APPARATUS
'
Generally, the compressing or deforming die members
are provided with V-shaped working surfaces. One of
Henry Esch, Newark, Ohio, assignor to Kaiser Aluminum
& Chemical Corporation, Oakland, Calif., a corpora
tion of Delaware
the die members is movable toward the other die mem
ber in a guillotine-like fashion such that the V-shaped
working surfaces de?ne a diamond-shaped aperture which
Filed Oct. 21, 1958, Ser. No. 768,763
4 €laims. (Cl. 153-1)
is reduced in size as the one die member moves relative
This invention relates to compression tools. More
to the other. A suitable housing is provided for the die
particularly, the invention is concerned with a tool for 10 members and one of the die members preferably is held
compressing sleeve-type connectors such as are used in
stationary while the other is actuated through the medium
forming compression connections between the ends of elec
of a hydraulic motor or the like.
trical conductors, terminal ends and conductors, and the
Turning now to a detailed description of the device
like.
de?ned in the present invention, reference is made to the
There are presently available on the market a wide 15
variety of compression tools for producing compression
of sleeve'type connectors of deformable material which
appended drawings forming a part of the-speci?cation,
and wherein
PEG. 1 is a perspective View of a hydraulically oper
are collapsed to form a mechanical bond between con
ated compression tool for sleeve-type connectors de?ning
ductors, wires, etc., and the connector or terminal end,
the invention, the stop means used therewith being shown
as the case may be. While these existing tools are effec
tive to produce the desired ultimate result, namely com
20 as removed therefrom, and
FIG. 2 is a partial, sectional view of the die assembly
utilized in the device as shown in FIG. 1.
di?’iculty with such existing compression tools has re
Referring now to FIG. 1, it may be seen that the
sulted from the fact that the compression type connectors
connector compressing tool includes a hydraulic or pneu
with which they are used will vary in size, i.e., the 25 matic cylinder assembly 10 within which there is a
inside and outside diameter of the connector will vary
movable piston and piston rod 16, as is conventional.
according to the size of the electrical conductor or
The rod or working end 12 of the cylinder 10‘ is externally
' pression of the-sleeves about the conductor, one inherent
threaded. A housing 14, of generally rectangular con
the like to which it is applied. Since such compression
tool's utilize dies to deform the connectors, it has been
necessary for the suppliers of such tools to provide with
each tool various sets of dies comprised of a series of
longest dimension of the rectangularly shaped housing
complementary die parts, each of which is adaptable for
16 (FIG. 2).
?guration, is secured to the threaded end 12 such that the
parallels the direction of movement of the piston rod
The longest side 16' of housing 14 is
provided interiorly with a pair of longitudinal grooves
use with a given size of connector. Die sets are expensive
and in addition, much time must be devoted to changing
or recesses 18, 18’. These grooves 18, 18' are so posi
die sizes each time the described compression tools are 35 tioned that a plane passed through their centers would
used on a smaller or larger size of connector than that
also bisect the center line of piston rod 16 and de?ne
longitudinal guides for a movable die member 20. Die
for which the tool may be “set-up” for at any given
moment.
Additionally, it has been customary for each
member 2%} is connected to piston rod 16 by any suitable
manufacturer to provide his own die sets with a par
means, such as a pin 25' or the like.
ticular con?guration whereby the die sets of one manu
facturer are not readily interchangeable with those of
another.
16 moves, die member 29 will also move in the housing
a thickened plate-like member of such a thickness as to
The present invention, however, contemplates that a
?t snugly within and yet be slidable along the guide slots
Thus, as the rod
14 longitudinally thereof. Die member 20 is essentially
single tool may be made available for use with all kinds 45 18 and 18'. As seen in FIG. 2, three edges of the plate
of compressible sleeve-type connectors, regardless of
source, or size and without expensive die sets. This tool
like die 2% are planar while the fourth edge comprises
the working face thereof. This latter face is com
prised of a pair of coplanar land portions 22 interrupted
by a central V-shaped portion comprised of outwardly
tion of the connector is produced. The dies for this 50 diverging surfaces 24 and 26. As will also ‘be apparent,
requires only a simple change of a pin-type stop to
assure that only the exact amount of necessary deforma
tool may be actuated by the same type of hydraulic or
pneumatic motor used with other tools by a simple con
the working face of this die 20, hereinafter referred to as
the male die member, is opposite to that edge of the die
member which is connected to the piston rod 16 such that
version step.
movement of this rod in response to pressure in the
The stated results are accomplished by providing-a
pair of die members having properly con?gured compres 55 cylinder assembly 10 will cause it to move toward or
away from the bottom or end wall 17 of housing 14.
sion surfaces. These members are so mounted in op
As seen in FIG. 2, the end of the housing 14 de?ned
posed relation to each other whereby they will de?ne an
by base or bottom wall 17 and portions of side Walls
opening such that, as the die members are moved one
16’ is also provided with a die member 30, hereinafter
relative to the other, the size of the opening between
referred to as the ‘female die member. The die member
the compressing surfaces thereof will be varied. Associ
3% may be comprised of a solid body of generally cube
ated with one of the die members are removable selectively
like form partially bisected by a slot 32 roughly corre
adjustable stop means such that movement of the other
sponding in width to slots 18 and 18' or alternatively,
may be formed of identical members so spaced as to
die member relative to the ?rst mentioned die member
will be limited. Thus, the size of the ?nal opening that 65 de?ne slot 32 therebetween. This slot 32 is of such a
dimension and so disposed as to readily receive the nar
is de?ned between the compressing surfaces of the die
row dimension of male die 20, thus permitting the male
members will be limited to a desired minimum to produce
die member 20 to move freely into and out of the
precise controlled compression of each connector regard
{female die member 50. Die member 30 is also pro
less of its size. The stopmeans is so correlated with
vided with a V-shaped working face de?ned by out
wire size that an operator need know only the Wire 70 wardly divergent surfaces 34 and 36. This working face
size. He can adjust the stop means to that wire size
and be assured that the exact desired amount of com
is so disposed as to be in opposed face-to-face relation
with respect to the working face of male die 20 such
>
—
1‘
3,047,042
3
that there is de?ned between the two die members a gen
erally diamond-shaped aperture. Preferably, female die
‘30, whether a single unitary part or two identical parts,
is ?xed, as by bo1ts33, to the bottom wall 17 of hous
ing 14. As movable male die 20 is forced toward the
female die 3%, the size of the diamond-shaped aperture
will decrease.
If no restraint is provided, the size of .
‘this aperture could be reduced to zero.
While it is true thata device as thus described could
compress sleeve-type connectors, it has been found that
excessive as well as too limited compression of such
connectors is detrimental to good bonding of a connector
7 to a cable, wire, etc. .To prevent over compression,
' while assuring proper compression, some means must be
sizes. It will also be apparent that various other changes
and modi?cations than those mentioned may be made,
all of which are within the purview of the instant inven
tion. The invention, therefore, is limited only to the
extent it is de?ned in the appended claims wherein
What is claimed is:
'
.
1. In a compression tool for deforming sleeve-type
connectors, a ?rst die means and a second die means,
means for moving said ?rst die means relative to said
second die means, a housing for supporting both of said
die means and provided with guide means for guiding said‘
?rst die means during the movement, thereof toward and
away from'said second die means, said ?rst die means
having coplanar land portions and each of said die means
provided whereby, for a given size connector, the, mini 15 being provided with generally V-shaped working’ faces
disposed in cooperating opposed face-to-face relationship
mum dimensions that can be de?ned between the work
so as to de?ne a contractible Work—receiving aperture
ing faces vof the die members 2%} and 30 are limited to
therebetween, and selectably disposed stop meanspro
the exact desired value. To this end, female die mem
vided on said second die means for selectively engaging
ber'30 is provided with a plurality of small related aper
and limiting the movement of said ?rst die meanswith
tures 40. These apertures project through female die
respect to said second die means, said step means com
member 30 in a direction normal to the central’ plane
prising a plurality of pairs of linearly spaced stop aper
of the slot 32 such that a pin member inserted within
tures and pin means insertable into selected pairs of said
these apertures will pass across slot 32. Preferably, the
spaced apertures and engageable with the land portions
pin used, as shown in FIG. 1, is a U-shaped readily‘ma
nipulatable pin 45 having two parallel arms 46. Each 25 of said ?rst die means, the relationship of said spaced
stop apertures being so correlated with thework-receiving
arm registers with a separate aperture 40 in the female
aperture de?ned between the ?rst and second die means
die member 30 such that as die member 29 moves guil
whereby the minimum to which said work-receiving aper
lotine-like into cfemale' die 30 the coplanar lands 22 of
ture can be reduced is a function of a pair of the stop
‘
In so doing, of course, 30 apertures in which the pin means is inserted.
die 20 ‘will hit each leg of the pin simultaneously to limit
the movement of the male die 20.
amond-shaped so-called “working aperture.”
2. A compression device, for deforming sleeve-like
compression connectors'comprising a piston and cylinder
The present invention contemplates, therefore, that the
pairs of linearly spaced stop pin apertures 4% be so ar
ranged that ;a de?nite relation exists between the working
faces of the die members, their position and wire size.
assembly, a housing ?xed to the said assembly, a ?rst
die means disposed in said housing and connected to said
piston and cylinder assembly so as to be energized there
by, a second die means removably but rigidly mounted
this pin also acts to limit the minimum size of the di
Thus, each pair of cooperating apertures for stop pin
within said housing, guide means in said housing for said
45 canbe assigned a wire size number, such as #1, #2,
?rst die means, said second die means also having a slot
which is in alignment with the guide means of said hous
ing whereby said ?rst die means may move into and
out of said second die means, each of said die means
#6, as is conventional. As a result, the minimum open
ing that will be de?ned between the working faces of
the die members 20, 30 at any one time will be such
having generally V-shaped working faces disposed in co
as to correspond exactly to the correct compression of
operating opposed ‘face to face relationship de?ning there
any connector that is to be used for ‘any one of these
between a generally rectangular work-receiving aperture
given sized wires, cables or the like. Thus,>all one, has
the dimensions of which can be varied by movement of
to do to change \from one wire size to the other and thus
adapt the tool {for connectors of the proper size is to 45 said ?rst die means toward and away from said second
die means, coplanar land portions on said ?rst die means,
move the stop pin 45 intorthe correspondingly identi?ed
pair of stop apertures‘40 and the tool is ready for use.
Although the basic tool ‘forming a manifestation of the
invention has been thus described, it will become apparent
and stop means comprising a plurality of pairs of spaced
apertures in said second die means and a pin selectively
that various modi?cations and changes in detail can be
inserta-ble in predetermined pairs of said spaced apertures,
said stop meansslbeing engageable by the coplanar land
For example, the hydraulic motor assembly it?
portions of said ?rst die means whereby the movement
7 made.
in the drawing is the same as that used on standard
pipe benders. On the other hand, this motor could be
speci?cally designed for use with the dies or alternatively,
it could be an air powered or even an impact type motor
if desired.
1
, Further, to prevent shearing of a connector by reason
of sharp edges, it is often found that the edges of all
working (faces 24 and 26, and 34 and 36 of both die
members 23 and 39 may be ‘advantageously chamfered
or rounded to reduce localized shear loads which will
cause undesired shearing of a connector. Also, since
sleeve-type connectors may be used to connect “endless
cables,” it sometimes may be advantageous to form hous—
ing 14 with one portion of side wall ‘16' removed. This
would permit side entry and exit of a connector and en
able use of the tool on such installations. Slots 18 and
18' may also be continued inbottom wall 17 and a suit
able opening 50 provided therein to permit removal of
of said ?rst die means with respect to said second die.
means can be selectively controlled.
3. A compression device for deforming sleeve-like com
pression connectors comprising a piston and cylinder
assembly including a piston rod movable into and out
of said cylinder, a housing ?xed to the cylinder of said,
piston and cylinder assembly, a ?rst die means disposed
in said housing and connected to said piston rod so as
to be movable therewith, a second die means remov
ably but rigidly mounted within said housing,'said hous
ing also being provided with guide means for receiving
said ?rst die means, said second die means being pro
vided with a slot which is in coplanar alignment with
the guide means of the housing whereby, said ?rst die
means may move into and out of the second die means,
each of said die means having opposed generally V-shaped
working surfaces which form a generally rectangular
work~receiving aperture therebetween the dimensions of
die member 20 from housing 14 after die member 39 is 70 which can be varied by movement of said ?rst die means‘
removed along with removal pin 25. This latter ar
toward and ‘away from said second die means, said ?rst
rangement is preferable.
die means also having coplanar land portions on each
Having thus described the invention, it will be apparent
side of the working surfaces thereof and said second
that the device permits the use of \a single tool‘ for proper
die means having stop means, said stop means comprising
compression of sleeve-type connectors for multiple wire
a plurality of pairs of spaced stop apertures in said
3,047,042
5
second die means, a two-armed pin selectively insertable
into a predetermined matched pair of said plurality of
pairs of spaced stop apertures, the spacing of the stop
apertures being so correlated with the work-receiving
6
coplanar land portions of the movable die means, the
relationship of said’ spaced stop apertures and the work
receiving opening which can be de?ned between the
Working faces of both die means being such that the
aperture de?ned between the ?rst and second die means 5 compression that can be exerted on a connector disposed
that the minimum to which the work-receiving aperture
between said die means by movement of one die means
can be reduced is a function of the pair of stop apere
relative to the other corresponds to the desired com
pression for the size of connector that is being deformed
between said working faces as determined by the location
tures in which the said pin is inserted.
4. A compression tool for deforming sleeve-like com
pression connectors comprising a stationary die means 10 of said pin means in the spaced stop apertures of the
stationary die means.
and a movable die means, each of said die means being
provided with oppositely and angularly disposed working
References Cited in the ?le of this patent
faces de?ning therebetween a work-receiving opening of
UNITED STATES PATENTS
generally rectangular con?guration, the dimensions of
which can be varied by movement of said movable die 15 1,241,377
Herbert ____________ __ Sept. 25, 1917
means toward and away from said stationary die means,
1,677,968
Hughes ____________ __ July 24, 1928
said movable die means also being provided with co
2,783,813
Duks _______________ __ Mar. 5, 1937
planar land portions bounding the working faces thereof,
FOREIGN PATENTS
and stop means provided on said stationary die means
for selectively engaging and limiting the movement of the 20
182,992
Germany ____________ _._ May 4, 1907
movable die means relative thereto, said stop means com
80,423
522,224
87,141
Switzerland __________ __ Mar. 1, 1919
France _____________ __ July 30, 1920
Switzerland __________ __ Nov. 1, 1920
prising a series of pairs of generally linearly spaced stop
apertures on said stationary die means and a two-armed
pin means insertable into selected pairs of said spaced
526,359
Great Britain ________ __ Sept. 17, 1940
stop apertures, said pin means ‘being engaged by the 25
548,620
Canada ____________ __ Nov. 12, 1957
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