close

Вход

Забыли?

вход по аккаунту

?

Патент USA US3080789

код для вставки
March 12, 1963
L. A. BUCHALTER
3,080,779
INDENTING TOOL
Filed May 2. 1961
FIG.|
2 Sheets-Sweet~ 1
FIG.2
INVENTOR.
LLOYD A. BUCHALTER
BY/
M
' ATTO NEY
March 12, 1963
|_. A. BUCHALTER
3,030,779
INDENTING TOOL
Filed May 2, 1961
2 Sheets-Sheet 2
1/
FIG-3 /\
\f $3 3
4c.
.1
%%
4o
3/
ii/
3
33
a2
' /
54*“
a
PIC-3.6
M
\ \VL
a”
‘
6’
"”"""'
\38
INVENTOR.
MM
LLOYD A. BUCHALT
ATTORNEY
'
Unite States Patent 0
r'
Ice
.
3,080,779
Patented Mar. 12, 1963
1
2
3,080,779
FIG. 1 is a front view of a tool embodying this inven—
tion in the closed position;
_
FIG. 2 is a rear view of the tool of FIG. 1 in the open
INDENTING TOOL
Lloyd A. Buchalter, Ridge?eld, Conan, assignor to Burndy
Corporation, a corporation of New York
Filed May 2, 1961, Ser. No. 107,231
8 Claims. (Cl. 81-15)
position;
FIG. 3 is an edge view partially in section taken along
line 3—-3, with the indentor assembly omitted;
FIG. 4 is a detail of FIG. 2 showing the tool in the
This invention relates to a die set tool, and more partic- ’
ularly to a multi-indent tool for electrical connectors.
closed position;
indenting tools for electrical connectors are well known. 10
Various types of indents have been utilized, e.g., a full
5—5; and
circumferential indent, a single indent, opposed indents,
FIG. 5 is a section through FIG.‘ 2 taken along line
.
.
FIG. 6 is a section of ‘the indentor assembly alone,
taken along line 6—6 of FIG. 1.
Turning to the ?gures, it will be seen that the tool in
cludes a frame 1 and a pair of side plates 2, 3, bonded
and multiple indents. A full circumferential indent is
difficult to accomplish; generally the result is an oval
cross~section rather than a circle, and there is little keying 15 thereto and a sheet metal handle 4 secured to said side
of the connector to the conductor. A single indent re
quires a very deep indent to secure the connector to the
conductor, and results in a gross distortion of the connec
tor cross-section. Opposed indents permit the use of a
plates by screws 5. Slidable in the frame 1 is a ram 6.
The ram and the frame provide a die assembly receiving
recess 7 therebetween. 'The ram has a slot 8 cut into its
lower portion into which the upper end of a movable
medium depth indent, but again distort the connector. 20 ,handle 9 is pivotally mounted by means of a ram hole
10, handle hole 11 and pin 12. A parallel pair of toggle
Multiple opposed indents produce the most desirable re
links 13, 14 are disposed within the side plates 2, 3 and
sult of permitting indents of minimum depth and mini
mum distortion of the connector.
on each side of the movable handle 9.
The links 13, 14
are pivoted to the frame side plates by a pin 15 and to
dents, it is necessary that the connector at all times be 25 vthe movable handle by a pin 16. The handle is biased
into its open position by a tension spring 17 pinned at 18
centered between the indentors, and that all indentors
.to the side plates 2, 3 and at 19 to the toggle links 13, 14.
apply uniform motion to the connector, thus producing a
The pin 15 has a slot 20 therein, in which is disposed a
symmetrical cross-section in the connector.
ratchet 21, which is pivotally mounted to pin 15 by a pin
The prior multiple indent tools did not always accom~
plish this result. Corrosion or foreign particles in the 30 22. The ratchet 21, which is biased by a spring 23 pinned
to the frame side plates at 24, and to the ratchet at 25,
tool would interfere with the symmetry of the indenting
cooperates with teeth 26 on the movable handle 9 in a
process. Also, if the connector did not offer uniform
known manner to ensure the complete closure of the
resistance to indenting around its entire periphery, a non
handle 9 before it maybe reopened.
symmetrical indent would result.
A die assembly carrier 27 is slidably disposed on the
It has recently been proposed to provide an indenting 35
rear face of the ram 6 and the frame 1. The carrier 27
tool wherein the connector is at all times disposed equally
comprises a plate 28, to which is bolted the indentor
between the upper and lower dies; wherein the connector
assembly 29, and a pair of legs 30, 31. An object of the
is at all times disposed equally between the indentors; and
hereinafter described structure is to maintain the carrier
wherein the rate of indentation of the individual indentors
may be positively controlled. This tool comprises a 40 27, and thereby its indentor assembly 29, centrally be
To maximize the advantages of multiple opposed in
frame having a ?rst rack, a ram having a second rack, and
tween the frame 1 and ram 6 during their relative move
a die holder assembly having a pinion which concurrently
meshes with both racks.
This rack and pinion tool admirably serves the purposes
ment.
for which it was intended.
However, the accurately cor
related racks and pinions are expensive to produce.
It is, therefore, an object of this invention to provide
an improved tool of the type above described, but which
Each carrier leg has a hole 32 therein.
A dumb
bell shaped link 33, having a central stud 34 which pivots
in the hole 32, is mounted on each leg. The ends 35, 36
of each dumbbell link are shaped to a circular pro?le. A
pair of upstanding guides 37, 38 are formed integral with
the frame 1 to provide a channel in which the circular
end 35 of the dumbbell links 31 may horizontally slide.
An upstanding rectangular area is formed on the rack to
is much more economical to produce.
Another object of this invention is to provide an indent 50 provide guide surfaces 39, 40 for the carrier legs 30, 31.
Upstanding from the rectangular area are a pair of inte
ing tool wherein the rate of travel of the indentors may
be positively controlled by the frame, ram, die holder
assembly, and a novel linkage therebetween.
A feature of this invention is an indenting tool com
prising a frame, a ram, a die holder assembly, and a link
gral guides 41, 42. A pair of U-shaped shims 43, 44 may
be disposed within the guides 41, 42 to provide a channel
in which the circular ends 36 of the dumbbell links 33
may horizontally slide.
Since the pivot stud 34 of the links is centrally located
pivotally mounted to said die holder assembly and mov
between the centers of the circular ends of the links, it
able therewith along a first axis and slidably mounted to
will be seen that the pivot stud, and thereby the die car
said frame and ram and constrained against movement
rier, will positively undergo one-half of any relative move
relative thereto along said ?rst axis, but free for move
60 ment between the frame 1 and the ram 6.
ment relative thereto along a second axis.
Should it be desired to have the die carrier positively
These and other objects and features of this invention
undergo a relative movement of less than oneahalf, ‘it
will become more apparent by reference to the following
description taken in conjunction with the accompanying.
-is merely necessary to use a link having a suitably non
drawings, in which:
‘centered'pivot stud.
'
‘
'
370801779
3
4
understood that it is not con?ned to the particular forms
A link cover plate 45 is secured to the upstanding
guide 42 by a. pin 46 and a screw 47 to retain the dumb
or uses shown and described, the same being merely
illustrative, and that the invention may be carried out
in other ways without departing from the spirit of my
bell links and shims in place and to act as a rearward
guide for the ram. A pair of plates 48, 49 are integral
invention, and, therefore, I claim broadly the right to
with the front of the frame to overlap the ram and act
employ all equivalent instrumentalities coming within
the scope of the appended claims, and by means of which,
as a frontward guide for the ram.
As may be seen in FIGS. 1 and 6, the removable in
objects of my invention are attained and new results ac
dentor assembly 29 includes a die body 50 having a trans
complished, as it is obvious that the particular embodi
verse bore 51 to accommodate a connector (not shown),
and a plurality of radial cutouts to accommodate in 10 ments herein shown and described are only some of the
many that can be employed to attain these objects and
dentors disposed therein. ‘Each cut-out accommodates
a wire indentor 53 and a shroud indentor 54.
accomplish these results.
The in
I claim:
1. A tool for compressing an article, comprising: a
dentors may be of rectangular cross-section, and may, if
desired, be integral with each other. A coil spring 55 is
mounted adjacent each indentor and has an end 56 15 frame having a force applying surface; a ram having a
force applying surface proximately disposed in opposi
thereof engaged in a slot 57 in the indentor to bias the
indentor away from the connector bore 51 and its other
tion to said frame force applying surface; said ram being
disposed for movement towards said frame force apply
ing surface; a movable article carrier disposed between
limits the outward movement of the spring end 56. A
cover plate 60 is secured, as by screws 61, to the die body 20 said frame force applying surface and said ram force
applying surface; and an interconnecting means inter
50 and serves to cover the die assembly receiving recess
connecting said frame, ram and article carrier to posi
7 in the tool when the die assembly is installed in the
tively move said article carrier towards one of said force
tool. The die assembly is secured to the tool by the
applying surfaces at a rate having a given relation to the
screws 62 ?xing the die body 50 to the carrier plate 28.
The sets of indentors, each including an indentor 53 25 rate at which said ram force applying surface moves to
wards said frame force applying surface; wherein said
and 54, which are biased outwardly by coil springs 55,
interconnecting means is a link which is pivoted between
abut symmetrically angled cam surfaces 63 and 64 formed
end 58 abutting the die body 50. A restraining pin 59
its ends to said article carrier, and which has one end se
When the ram
cured to said frame in a direction parallel to the relative
is moved from the open position shown in FIG. 2 to the
closed position shown in FIGS. 1 and 4 the cam, surfaces 30 movement of said carrier and said frame, and which has
the other end secured to said ram against movement rel
63 and 64 force their associated indentor sets, each in
on the ram 6 and frame 1 respectively.
ative to said ram in a direction parallel to the relative
cluding an indentor 53 and 54, through the die body 50.
movement of said carrier and said ram.
The indentors enter the connector receiving bore 51,
2. A tool for compressing an article, comprising: a
and indent the connector (not shown).
In operation the operating cycle of the tool is initiated 35 frame having a force applying surface; a ram having a
force applying surface proximately disposed in opposition
from its open position as shown in FIG. 2 with the handles
to said frame force applying surface; said ram being dis~
4 and 9 spread apart and the connector and wire to be
posed for movement along a ?rst axis towards said frame
crimped are inserted ‘between the indenters. With the
force applying surface; a movable article carrier disposed
handles extended the ram 6 is in the down or lower posi
tion and the bearing ends of the indenters extend into 40 for movement along said ?rst axis between said frame
force applying surface and said ram force applying sur~
contact with the bearing surfaces 63 and 64. Spring 17
face; and an interconnecting means interconnecting said
frame, ram and article carrier to positively move said
article carrier towards one of said force applying surfaces
is in a relaxed position and ‘spring 23 is in a neutral posi
tion with the pawl 21 in a neutral position. End 36 of
the dumbbell links are down.
As handle 9 starts to
close toward handle 4 it loads spring 17 and the handle 45 at a rate having a given relation to the rate at which said
ram force applying surface moves towards said frame
through a double toggle arrangement pivots about point
force applying surface; wherein said interconnecting
12 while simultaneously pivoting about point 16. Thus
the distance between points 15 and 12 increases causing
means is a link which is pivoted between its ends to said
article carrier, and which has one end secured to said
the ram 6 to raise forcing the indenters inward ‘as hear
50 frame against ‘movement relative to said frame along said
ing surfaces 63 and 64 approach the center.
?rst axis, and which has the other end secured to said
Under normal circumstances, including the absence
ram against movement relative to said ram along said
of foreign particles in the die assembly and tool generally,
?rst axis.
the indentors should close symmetrically, producing a
3. A tool according to claim 2 further including a plu
symmetrical crimp. However, to ensure that the die
rality
of compression members carried by said article
55
body is at all times equally spaced between the frame and
carrier and disposed for movement through said carrier
to compress an article carried therein; some of said plu
rality of compression members disposed to abut said frame
ways travel one-half the distance undergone by the ram
force applying surface and others of said plurality of
6 with respect to the frame .4. The carrier 27 is directly
coupled to the link studs 34 and the die body 50 is ?xedly 60 compression members disposed to abut said ram force
ram, the dumbbell link arrangement described above has
been provided. The dumbbell link pivot studs 34 al
applying surface, said compression members adapted to be
moved by said force applying surfaces to compress the
carried article.
ram and frame cam surface parts 63 and 64. As the tool
4. A tool according to claim 3 wherein said link pivot
is closed, the ram approaching the head of the frame, the
dumbbell links and slots will at all times maintain the 65 is centrally located between said two link ends, whereby
said carrier is positively maintained at equal distances be
die body 50 in the desired centered relationship. Thus,
tween said frame force applying surface and said ram
a symmetrical indentation must uniformly result.
secured to the carrier 27. When the tool is ‘in the open
position the die body 50 is centered with respect to the
force applying surface.
As mentioned previously, should it be desirable to
’
5. A tool according to claim 3 wherein said article
change the rate of travel of the individual indentors, for
example, due to the necessity ‘of crimping a connector 70 carrier comprises a die block having an article receiving
cavity; a plurality of radially extending cavities in said
which does not have polar symmetry, it is merely neces
block; an indentor disposed in each of said radial cavities
sary to move the dumbbell link pivot stud from its cen
and movable relatively through said radial cavity and into
tral location on the link; and if desired, to change the
said article receiving cavity.
shape of angles of the individual cam surfaces.
6. A tool according to claim 3 wherein said radial
I have thus described my invention, but I desire it
a
8,080,779
6
cavities are equally angularly spaced about the periphery
of said article receiving cavity.
7. A tool according to claim 3 wherein said article
receiving cavity is centered in said die block and said
indentors are of equal lengths and have ends normally
projecting out of said radial cavities remote from said
article receiving cavity.
8. A tool according to claim 5 wherein when said ram
force applying surface is moved towards said frame force
applying surface, said surfaces abut said projecting in~
dentor ends and move said indentors towards the center
of said article receiving cavity.
References Cited in the ?le of this patent
UNITED STATES PATENTS
2,914,976
2,921,618
3,021,738
Demler _____________ __ Dec. 1, 1959‘
Fuller _______________ __ Jan. 19, 1960
Anderson et al _________ __ Feb. 20, 1962
Документ
Категория
Без категории
Просмотров
0
Размер файла
516 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа