close

Вход

Забыли?

вход по аккаунту

?

Патент USA US3091848

код для вставки
June 4, 1963
H. F. HILD ETAL
METI-IOD FOR SECURING TERMINALS
Filed Oct. 2, 1959
' 3,091,838
2 Sheets-Sheet 1
.1284 k/44
'//////,/,a
a
34
I32
30-’;
20
',
v
>
5 I72
I
i
I
O
|
I
m
I.
I I I l I I I I I l l I I I I l
N.
Io:l
:
l
.L_ _
June 4, 1963
H. F. HILD ETAL
3,091,838
METHOD FOR SECURING TERMINALS
'2 Sheets-Sheet 2
Filed 00’0- 2, 1959
|
L__________________J
United States Patent 0 M1C6
1
3,091,838
METHQD FOR SECURING TERMINALS
Henry F. Hild and Siegfried E. Manecke, Indiana, Pa., as
signors to Robertshaw-Fulton Controls Company,
Richmond, Va., a corporation of Delaware
Filed Oct. 2, 1959, Ser. No. 844,100
3,091,838
Patented June 4, 1963
2
such as brass, and may have various con?gurations, one
of which is shown in FIG. 1. The terminal 10, shown
in FIG. 1, has a male connector portion 16 extending
upwardly of the aperture 12 in the casing 14. The male
connector 16 has a length and width of suitable dimen
sions, which dimensions are primarily determined by the
female connector (not shown) that will be used in the
electrical circuit.
This invention relates to method for securing terminals
A main body portion 18 of the terminal 10‘ is located
to a casing and, more particularly, to securing ?at plate 10 beneath the male connector portion 16 of the terminal
male terminals to a molded plastic casing.
10 and substantially between the sidewalls 20 of the aper
It has been the practice to secure a ?anged electrical
ture ‘12. The main body portion 18 has a width which
terminal to a relatively thin-walled casing by overlapping
is slightly greater than the base width of the male con
portions of the terminal so as to engage one surface of
nector portion 16. The depth of the main body portion
a wall. Generally, this practice of securing a terminal 15 18 of the terminal 10 is greater than the thickness of the
4 Claims. (Cl. 29-15555)
to a casing has been referred to as “staking.”
To secure the ?anged terminal to an aperture in the
casing, 21 sharp-edged punch is used to overlap a portion
of the body of the terminal, closely adjacent to the pe
riphery of the aperture in the casing wall, so as to form
outwardly extending ?anges which secure the terminal
to the wall. However, as the terminal is generally made
of a malleable metal, such as brass, it is relatively soft
and easily split when subjected to shearing stresses. In
addition, the sharp-edged punch used for peeling the
wall of the casing 14.
A small area on each side of
the main body portion 18 extends above the upper sur~
face 22 of the wall of the casing 14, to form shoulders 24.
Beneath the main body portion 18 of the terminal are
oppositely disposed ?ange portions 26 which extend out~
wardly from the longitudinal length of the terminal 10.
The ?ange portions 26 of the terminal '10 are of su?icient
width and depth to prevent the terminal 10 from being
inserted completely through the aperture 12 in the thin
wall of the casing 14.
Beneath the main body portion 18 and the ?anged
portions 26 of the terminal ‘'10, there is a downwardly
extending projection. This projection of the terminal 10
terminal is not resiliently mounted and, therefore, trans
mits a high impact shock to the terminal when the sharp
edged punch is actuated.
Another di?iculty in staking terminals to a thin-walled
is the terminal connector 28 to which electrical conduc
casing is the extreme accuracy with which the sharp 30 tors (not shown) can be secured by numerous means, one
edged punch must be positioned prior to actuation. Gen
of which is soldering. The terminal connector 28 can
erally, the punch has at least two edges that engage sub
have numerous con?gurations, but for representative
stantially oppositely disposed side portions of the termi
nal. If the punch is not properly positioned, one edge
will engage the associated side portion of the terminal;
while the other edge will engage the surface of the wall
of the casing. In this event, the casing can easily be
broken by the impact. Also, should the punch initially
be positioned to unevenly engage opposite sides of the
terminal, then uneven stresses will be imposed upon the
terminal upon impact. These uneven stresses will be
transmitted to the casing to crack the thin wall upon
which the terminal is mounted.
purposes is substantially rectangular.
A jig 30 is shown by dotted line con?guration in FIG.
1. The jig 30 can be of any known type and is used
primarily to support and position the terminal 10 in the
aperture .12 so that the upper edges 32 of the ?anges 26
of the terminal abut against the lower surface 34 of the
thin-walled casing 14.
As shown in FIG. 2, a cylindrical punch 36, having a
concentric cylindrical cavity 38 bored in the central por
tion of the punch 36, is depicted as being partially low
ered over the male connector portion 16 of the termi
nal 10.
Edge 40 is formed at the junction of a cylindrical sur
onto the surface of the casing.
face 39 of the cavity 38 and a bottom beveled surface 42
Another object of this invention is to spin a shoulder
of punch 36. Beveled surface 42 is of frusto-conical
portion of a terminal onto the upper surface of a thin
form being inclined at a slight angle relative to a plane
walled casing under a relatively light, uniformly distrib
normal to the axis of rotation of the punch 36. The an
50 gular inclination of the beveled surface 42 will depend
uted impact operation.
A further object of this invention is to fasten electri
upon the material from which the terminal is made.
cal terminals to a thin-walled casing in a rapid, inexpen
Edge 40 will engage the upper edge 44 of the shoulder
sive manner.
24 immediately adjacent to the base width of the male
Other objects and advantages will be apparent from
connector portion 16, when there is a downward motion
the following description of the invention taken in con 55 of punch 36. Edge 40 will cut into shoulder 24, and
nection with the accompanying drawings wherein:
beveled surface 42 will peel the cut metal outwardly.
FIG. 1 is an elevation view, partly in section, of a
It will also be apparent that the cavity 38 of the punch
terminal positioned in a thin-walled casing;
36 must be cylindrical in form. The diameter of the
FIG. 2 is a view similar to FIG. 1 of the terminal and
cavity 38 is determined by the amount of material to
punch;
60 to be peeled from the shoulder 24 of the terminal 110,
FIG. 3 is a view of the terminal and punch in operative
and the width of the male connector 18 of the terminal 10.
An object of this invention is to secure terminals to a
thin-walled casing by peening a portion of the terminal 45
relationship;
In FIG. v2, the circular punch 36 is diagrammatically
shown as being resiliently mounted by means of spring
FIG. 4 is an end view, partly in section, of the terminal
and punch after the spinning and peening operation; and
FIG. 5 is a plan view of the terminal after the spinning
46. Punch 36 is mounted to a drive mechanism (not
and peening operation.
speeds; and, in addition, the drive mechanism impartsv
Referring more particularly to FIG. 1, there is shown a
?at terminal post 10 inserted and positioned in a slit aper
ture 12 of a thin-walled casing 14. Thin-walled casing
14 can be molded from any known phenolic plastic hav
ing good structural and electrical insulation properties.
The terminal 10 is stamped out of a ?at sheet material,
shown) that will rotate or spin punch 36 at variable
a rectilinear reciprocating motion to punch 36 so that:
the punch has rapid longitudinal movement in two directions. The spring 46 will limit the impact pressure of
punch 36 in the downward direction to a constant value..
As shown in FIG. 3, a quick, rapid, light impact blow
of punch 36 in the downward direction combined with
3,091,838
4
peen the shoulder portion 24 of the main body 18 of the
terminal .10 away from the male connector portion 16.
The beveled edge 42 of the punch 36 will curl the peeled
ing the terminal with the flange abutting against the eas
ing wall and the terminal post projecting through the
aperture and outwardly of the wall, simultaneously cut
ting and spinning the projecting portion of the terminal
shoulder portion 24over so as to form an upper ?ange
post away from the main body thereof until the spun
48 to the main body 24 of the terminal 10. It is to be
noted that the curled and peened shoulder 24 will form
a ?ange 48 on the upper surface 22 of the wail of the
portion engages the casing wall, and further cutting and
spinning the projection portion while simultaneously
peening the spun portion into evenly stressed engagement
with the casing wall.
the spinning action of punch 36 will evenly peel and
casing 14.
2. The method of securing a ?anged terminal post in
The jig 30 will force the ?ange 26 of the terminal 10 10
an a ertured casing wall which comprises, positioning
into engagement with the lower surface 34 of the thin
the terminal with the ?ange abutting against the casing
walled casing ‘14 to insure proper engagement with the ‘
wall'and the terminal post projecting through the aper
lower surface 34 of the wall. vIn addition, the peeling
ture and outwardly of the wall, simultaneously cutting
and spinning action of the punch 36 will draw as much
of the shoulder portion 24 of the main body 18 of the 15 and spinning the projecting portion of the terminal post
until the spun portion curls toward and engages the cas
terminal 10 out'of the aperture 12 as is exposed to fur
ther insure a tight engagement between the upper sur
face 32 of the terminal ?ange 26 and. the lower surface
'34 of the thin-walled casing 14. The action of the
resilient spring 46 on the punch will equalize the pressure
on the bevelededge 42 to thereby insure that each peened
shoulder 48 will be subjected to the same light oscillatory
ing wall and further cutting and spinning the projecting
portion while simultaneously peening the spun and curled
portion of the terminal post into evenly stressed engage
ment with the casing wall.
7
3. The method of securing a ?at plate ?anged terminal
post in a slit aperture in a casing wall which comprises,
positioning the terminal with the ?ange abutting against
the casing wall and the terminal post projecting through
The male terminal .10 is shown‘ in FIG. 4, with the 25 the aperture and outwardly of the wall, simultaneously
cutting and spinning oppositely disposed projecting por
punch 36 partially withdrawn from its. lowermost stroke.
impact motion of the punch 36; and, in addition, to the
spinning motion of the punch.
tions of the terminal post until the spun portions engage
said casing wall, to overlap the longitudinal ends of the
slit aperture, and further cutting and spinning the project
to form a tab 50 which is not in alignment with the flat 30 ing portions while simultaneously peening the spun por
tions of the terminal post into evenly stressed engage
surface of the terminal 10. For purposes of representa
ment with the casing wall closely adjacent to the longitu
tion, the peened shoulders in FIGS. 3 and 4 have been
dinal ends and sides of the slit aperture.
enlarged relative to their true representations. In actu
4.7 The method of securing a ?at plate flanged terminal
ality, the uppermost portion 52 of the peened shoulder
It is to be noted that the peened shoulder 48, due to
the spinning action, overlaps the upper surface 22 of the
casing 14 immediately adjacent to the aperture 12 so as
is substantially level with the upper surface 22 of the
casing @14 and could be considered as being flared into
the upper surface of the casing.
‘
As shown in FIG. 5, the peened shoulder 48 is spread
out over'the adjacent surface of the thin-walled casing
14, and is, in e?ect, twisted slightly from the ?at plane
of terminal 10 so that the terminal 10 cannot be with
drawn from the aperture 12.
Although not shown in the drawings, it will readily
be apparent that a substantially circular terminal having
a ‘circular shoulder about the male connector portion of
the terminal could also be subjected to the action of the
post in a slit aperture in a casing wall which comprises,
positioning the terminal with the ?ange abutting against
the casing wall and the terminal post projecting through
the aperture and outwardly of the wall, simultaneouslyr
cutting and spinning oppositely disposed shoulder por
tions of the terminal post until the spun portions curl
toward and engage the casing wall, to overlap the longi
tudinal ends of the slit aperture, and further cutting and
spinning the projecting portions while simultaneously
peening the spun and curled portions of the terminal
post into evenly stressed engagement with the casing
wall.
punch as previously described. The circular terminal
will have its shoulder spread out to overlap the area im
mediately adjacent to a circular aperture in the thin
References’ Cited in the ?le of this patent
UNITED STATES PATENTS
walled casing.
In addition, it is to be realized that numerous terminals
can be mounted in a single jig, so that each terminal is
inserted through an appropriate aperture in the casing.
In this manner, several punches can be mounted on one
drive mechanism so that the numerous terminals can be 55
fastened to the casing in one operation.
While only one embodiment of the invention has been
shown and described herein, it will be apparent that nu
merous modi?cations and changes can be made without
departing from the scope of the invention as de?ned in,
the appended claims.
We claim:
1. The method of securing a ?anged terminal post
in an apertured casing wall which comprises, position
4. ‘
1,234,395
2,396,082
‘2,404,051
Schmidt _____________ __ July 24, 1917
Bugg _________________ __ Mar. 5, 1946
Ginter ______________ __ July 16, 1946
2,524,420
Blampin _.___' _________ __ Oct. 3, 1950
2,682,849
Wright ______________ __ July 6, 1954
2,692,422
2,779,998
‘2,782,392
Pierce _______________ __ Oct. 26, 1954
Bailey ________________ __ Feb. 5, 1957
Stolle ________________ __ Feb. 19, ‘1957
2,802,257
2,914,745
Holtzapple __________ __ Aug. 13, 1957
Krol et a1. __________ __ Nov. 24, 1959
.
625,654
FOREIGN PATENTS
Germany ____________ __ Feb. 13, 1936
.iha_.
Документ
Категория
Без категории
Просмотров
0
Размер файла
400 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа