Note : Les descriptions sont présentées dans la langue officielle dans laquelle elles ont été soumises.
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The invention relates to an electrical circuit device.
According to the invention, there is provided an
electrical circuit device comprising an insulating housing
containing ~our pairs of switch poles and two pairs of
electrical contacts, each contact pair for pluggably receiving
an electrical component therebetween, a first pole of each
pole pair having a terminal portion projecting out of the
housing, the second pole of each pole pair being formed
integrally with an individual one of the electrical contacts,
and the second pole of one pole pair formed integrally
with one of the pairsof contacts being formed integrally
with one o a fifth pair of sw$tch poles, the other one
of which is formed integrally with the second pole of
one of the pairs of poles formed integrally with the other
lS pair of contacts.
An example of the invention will now be described
with reference to the accompanying drawings in which:-
Figure 1 ls a perspective view of a DIP circuit
device;
Figure 2 is a cross-section taken along the lines
2-2 o Figure l;
Figure 3 is a cross-section taken along the lines
3-3 of Figure l;
Figure 4 is a plan view partly in cross-section;
Figure 5 is a plan view of metal strip electrical
switch poles and electrical contacts in blank form;
Figure 6 is an equivalenk circuit;
Figure 7 is a diagram showing combinations of series
and parallel interconnections of the electrical components
or impedances within the DIP according to the present
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invention; and,
Fig~re 8 is a perspective view of the base of the
device.
The DIP device includes a moulded dielectric base 2
and a separately moulded dielectric cover 4 which is
joined thereto by ultrasonic welding or by adhesive.
Metal strip pieces 6 (Figure 5) are moulded directly into
the dielectric base portion 2 as shown in Figure 4
using a conventional technique.
The strip 6 comprise a pair of switch poles 8 and 10
separated from each other by a gap 12, forming part of a
first switch A. The switch pole 8 has an integral elongate
portion 14 which forms an electrical terminal which projec~s
out of the base 2 and which may be bent subsequently as
shown in Figure 1 to depend from the base 2 to provide
an electrical terminal for plugging the DIP into a printed
circuit board (not shown). A pair of electrical contacts
16 and 18 are separated from each other by a parting
line 20. Contacts 16 and 18 are adapted to be bent at
right an~les along dotted lines 22 and 24, respectively.
The switch pole 10 o~ the switch A is integrally joined
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by a metal strip poxtion 26 to the contact 18. A second
swltch B is formed with metal strip switch poles 28 and
30, separated from each other. The pole 30 is provided
with an integral electrical terminal 32 which forms another
electrical terminal for the DIP, similar to the terminal 14
a~ shown in Figure 1. The switch pole 28 is integrally
joined by a metal strip portion 35 to the contact 16.
Another switch C includes spaced metal strip switch poles
36 and 38. The switch pole 36 is integrally joined to
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the switch pole 28 by a metal strip portion.
Another switch D comprises a pair of spaced metal
strip swi~ch poles 42 and 44. The switch pole 42 is
provided with an i~ltegral elongate electrical terminal
46 similar to each of the terminals 14 and 32. The
swltch pole 44 is integrally joined to the switch pole
38 by a metal strip portion 48. Adjacent the switch D,
the metal strip 6 is provided with a pair of metal strip
electrical contacts 50 and 52 separated from each other
by a parting line 54 and adapted to be bent along the
dotted lines 56 and 58, similarly to the contacts 16 and
18. The contact 52 is integrally joined by a metal strip
portion 60 to the switch pole 44. An adjacent switch E
is formed by a pair of spaced metal strip-form electrical
lS switch poles 62 and 64 similar to the switch poles 28
and 32. The switch pole 64 includes an integral terminal
66 similar to the electrical terminals 14, 32 and 46. The
swltch pole 62 is integrally joined by a metal strip portion
68 to the electrical contact 50. ~n adjacent switch F lg
also formed from a pair of spaced metal strip contacts
70 and 72. The contact 70 is joined integrally by a
metal portion 74 to the switch pole 62. An adjacent switch
G is formed by a pair of spaced metal strip electrical
switch poles 76 and 78 similar to the switch poles 8 and lO.
The switch pole 76 includes an integral projecting
elongate~electrical terminal portion 80 similar to the
electrical terminal 14. The switch pole portion 78 is
joined by an integral metal strip portion 82 to the switch
pole 72. An adjacent pair of metal strip electrical
contacts 84 and 86 are separted by a paxting line 88 and
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8802
are bent similarly to the contacts 16 and 18. The
contact ~6 is ~oined integrally with the switch pole 78
by an integral metal strip portion 90, Another switch H
is formed by a pair of spaced metal strip electrical switch
poles 92 and 94 similar to the switch poles 28 and 30. The
switch pole 94 includes a projecting elongated integral
electrical terminal portion 96 similar to the terminal
portion 32. The switch pole 92 is provided wlth an integral
metal strip portion 98 which integrally joins the switch
pole 92 and the electrical contact 84.
As shown in Figures 1, 2 and 4, each of the switch
poles 10, 30, 38~ 44, 64, 72, 78 and 94 are formed with
arcuate raised portions lOo. As shown in Figure 2, with
regard to the switch poles 8 and 10, and also applying
in respect to each other pair of switch poles, a switch
carriage 102 is provided. The switch carriage 102 is
formed with a dielectric body 104 which carries a metal
strlp switch contact 106 having integral depending and
diagonally projecting spring legs 108. The free ends 110
of the spring legs electxically engage corresponding switch
poles 8 and 10 when the carriage 102 is located as in
Figure 2. The switch is in closed position allowing an
electrical circuit to be completed from the switch pole
8 through the spring legs 108 to the switch pole 10. The
carriage 102 is further provided with a knob 112 which is
integral with the body portion 104 and projects through a
corresponding slot 114 in the cover 104.
The arcuate portion 100 provides a retention stop
against which the arcuate free end 110 registers when the
. 30 switch carriage is in the position shown in Figure 2.
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To move the switch to an open position, the carriage
is manually shifted from left to right in Figure 2, ~he
free end 110 of a corresponding spring leg 108 will ride
over the projection 100 of the contact 10. The other
arcuate free end 100 will slide off the contact 8 and rest
on a dielectric projection 116 formed integrally with the
base 2 keeping the contact free end 110 disengaged from
the switch pole 8 thereby providing an open circuit. Any
other type of operating member can be substituted for the
particular one shown.
Figure 3 illustrates contacts 16 and 18 which are
bent into L-shaped configurations to provide oppositely
facing metal strip portions 118. Thus, as shown in Figure 4
the contacts 16, 18, 50, 84 and 86 are similarly bent to
provide opposed metal strip portions 118 of the contacts.
As shown in Figures 3 and 8 the base 2 of the DIP
package 1 is integrally moulded from insulating material
with a plurality of rectangular recesses or cavities 120
having sidewalls 122 and exposing correspond$ng pairs of
the metal strip portions 118 therein. As sho~m in Figure 3
an electrical circuit component 124 is plugged between
the spaced portions 118 of the contact 16 and 18. The
component 124 may be a resistor, capacitor, inductor or
any other type of electrical circuit component or electrical
impedance. The electrical component selected may be
soldered or bonded to the contact portions 118 if desired
and potted in the cavities with epoxy.
As indicated in Figure 4, the switch contacts 16 and
18 can receive a first impedance Zl~ the contac~ 50 and 52
can receive a second electrical component or impedance Z2~
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and the switch contacts 84 and 86 can receive a third
impedance Z3.
Figure 7 illustrates the equivalent circuits obtained
with the identified switches closed.
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