U.S. patent number 3,622,938 [Application Number 04/882,083] was granted by the patent office on 1971-11-23 for electric power distribution device.
This patent grant is currently assigned to Matsushita Denko Kabushiki Kaisha. Invention is credited to Yoshiyuki Ishida, Masamichi Ito.
United States Patent |
3,622,938 |
Ito , et al. |
November 23, 1971 |
ELECTRIC POWER DISTRIBUTION DEVICE
Abstract
The invention provides a connector means adaptable for both
mutual interconnection between electric power distribution ducts
and power feed-in connection of a feed-in member to one of the
ducts. The means comprises an insulative base member having at
least one endwise projection and containing at least a pair of
contactors extending in the same endwise direction. When the means
is engaged to an end of the duct, said projection fits in a
longitudinal space between respective opposing conductors in the
duct or respective conductors and respective sidewalls of a duct
housing so as to have the means mechanically held to the duct end,
while said contactors enter into resilient electric contact with
the respective conductors of the duct. When the connector means is
used for the power feed-in connection, the contactors are connected
at the other end to power source lines and, when used for the
mutual interconnection of ducts, the means is provided with the
projections and contactors respectively symmetrically extending in
both endwise directions.
Inventors: |
Ito; Masamichi (Kadoma-shi,
JA), Ishida; Yoshiyuki (Kadoma-shi, JA) |
Assignee: |
Matsushita Denko Kabushiki
Kaisha (Osaka, JA)
|
Family
ID: |
27282959 |
Appl.
No.: |
04/882,083 |
Filed: |
December 4, 1969 |
Foreign Application Priority Data
|
|
|
|
|
Dec 10, 1968 [JA] |
|
|
43/108135 |
Mar 6, 1969 [JA] |
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44/20239 |
Mar 10, 1969 [JA] |
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44/21501 |
Mar 6, 1969 [JA] |
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|
44/20239 |
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Current U.S.
Class: |
439/115;
439/207 |
Current CPC
Class: |
H01R
25/145 (20130101) |
Current International
Class: |
H01R
25/00 (20060101); H01R 25/14 (20060101); H01r
013/60 () |
Field of
Search: |
;339/14,20-24 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Champion; Marvin A.
Assistant Examiner: Hafer; Robert A.
Claims
What we claim is:
1. A connector device for electric power distribution ducts having
respectively a pair of opposing longitudinal conductors
respectively held in a duct housing through a pair of insulative
members positioned to insulate said conductors from said duct
housing, said conductors being laterally spaced from each other to
form a longitudinal space therebetween within said housing, said
conductors and said insulating members extending longitudinally
beyond one end of the duct housing, said connector device
comprising a base member of an insulative material provided with at
least one longitudinal projection on one end thereof and a pair of
longitudinal grooves substantially along each sidewall, the other
end of said base member being adapted to receive leads from an
electric source, a pair of resilient contactor members respectively
fitted in each of said grooves of said base member and forming
contacting parts extending longitudinally along opposite sides of
said projection and terminating short of the end of said
projection, said contactor members having terminal members at the
ends opposite the ends forming said contacting parts for connecting
said contactor members to said leads, and a single unitary covering
member removably attached to said base member and covering the
entirety of said contactor members, said projection of the base
member being complementary to said longitudinal space formed
between said conductors so that, when the connector is engaged to
an end of the duct, said projection is closely fitted in said
longitudinal space for firm mechanical coupling between the
connector device and the duct, said resilient contactor members
being positioned to engage only the longitudinal extensions of said
opposed surfaces of said conductors when said projection is fitted
in said space, said contactor members also being laterally spaced
from said projection so as to be deflected inwardly toward said
projection upon engagement with said conductors whereby the
contactor members are biased away from each other and toward said
conductors to maintain firm electrical contact with said
conductors.
2. The connector device according to claim 1, in which said base
member is provided with another longitudinal projection at its
opposite end to said projection so as to be symmetrical therewith,
and said contactor members are provided with symmetrical contacting
parts at both ends.
3. The connector device according to claim 1, in which said housing
of the duct is made of a metal and is provided with at least one
longitudinal hollow space between inner sidewalls of the housing
and outer sidewalls of said insulative material for the
conductors.
4. The connector device according to claim 1, in which said housing
of the duct is made of a metal, and said base member of the
connector device is provided with a grounding means fixed thereto
at its outer sidewall and extending in at least one endwise
direction of the device, so that when the device is engaged to an
end of the duct said grounding means is brought into contact with
the metal housing of the duct.
5. The connector device according to claim 1, in which said housing
of the duct is made of a metal, said base member is provided with a
grounding means fixed thereto at its outer sidewall and in at least
one endwise direction of the device, and said endwise extending end
of the grounding means has a roughened surface, so that when the
device is engaged to an end of the duct said roughened surface of
the grounding means scratches the inner surface of said metal
housing so as to closely contact with the housing.
Description
This invention relates in general to electric power distribution
device to desired positions in working area and, more particularly,
to connection mechanisms for connecting power feed-in caps to
beginning ends of power distribution ducts from which the power can
be distributed in branches to certain desired positions in the
working area and, also, for connecting respective ones of such
ducts to each other.
In connecting respective ones of conventional-type distribution
ducts of the kind referred to, there have been used connecting
plates separately prepared, each of which would be engaged from
left and right sides in each of connecting portions of the ducts
respectively butted end to end as aligned with respect to their
center line. With these connecting plates thus engaged, connecting
metal members for conductors will be moved into midportion of the
connecting portions, then fastened by means of plus screwdriver and
lastly a window screening plate will be fitted in position on the
upper surface. The connecting operation is thus completed and,
consequently, the operation has involved such defect that the same
has been troublesome. The present invention has been suggested to
remove such defect as above.
A main object of the present invention is, therefore, to provide a
novel connector means for the distribution duct, which is capable
of connecting in an electrically and mechanically tight manner by a
simple fitting-in operation of the duct and a feed-in cap
member.
Other objects and advantages of the present invention will become
clear upon reading the following disclosures of the present
invention detailed with reference to the accompanying drawings, in
which:
FIG. 1 is a perspective view of a feed-in cap and a distribution
duct of the present invention, the former of which is shown as
disassembled into its respective parts and the latter of which is
shown only with its end, both being of a basic arrangement of the
connector means according to the present invention.
FIG. 2 is a perspective view of the feed-in cap and distribution
duct shown in Fig. 1 as connected to each other.
FIG. 3 is a plan view of the feed-in cap and distribution duct of
Fig. 2, the cap being shown as partly cut off to show the
connecting state between them.
FIG. 4 is a perspective view of the feed-in cap having a grounding
plate as disassembled and the distribution duct.
FIG. 5 is a plan view of the feed-in cap and distribution duct of
FIG. 4, the cap being shown as partly cut off to show the
connecting state between them.
FIG. 6 is a perspective view of a connecting means, shown as
disassembled, for connecting respective ones of the distribution
ducts to each other and two of the distribution ducts to be
connected.
FIG. 7A is a plan view of the connecting means and the distribution
ducts as connected to each other by the former, which is shown as
partly cut off to show the connecting state.
FIG. 7B is a side view of the connecting means and ducts shown in
Fig. 7B.
It should be understood here that, while the present invention will
be disclosed with reference to certain preferred embodiments as
illustrated, the invention should not be limited to the particular
embodiments but rather should include all possible modifications,
alterations and equivalent arrangements within the spirit and scope
of the invention as defined in the appended claims.
References shall be made first to basic or fundamental structure of
the electric power distribution duct labeled as A in Figs. 1
through 3, to which the connector means of the present invention is
applied. Throughout the drawings, the ducts as well as the
connector means are shown as turned over with their normal lower
upside for the purpose of better understanding.
Referring to Figs. 1 through 3, conductor-holding frame member a
comprising insulators 1 of a lateral U-shaped in section
respectively holding conductors 2a and 2b at their inner wall so as
to have the conductors 2a, 2b opposed to each other, is received
inside a housing b made of a metal and having an open slit 3 at its
normal lower surface for mounting plug members (not shown) to the
duct. Tail end, as well as beginning end, of said frame member a is
substantially projected out of corresponding end of said housing
b.
Further in Figs. 1 through 3, C is a feed cap having the
fundamental structure of the connector means according to the
present invention. At the forward end of this feed-in cap C to be
engaged in the duct A, a pair of side projections 3a and 3b and a
center projection 4 are formed so as to be projected. Said side
projections 3a and 3b are formed in a shape capable of being
engaged respectively in each of spaces g.sub.1 and g.sub.2 remained
between respective outer sidewalls of the conductor-holding frame
member a and respective inner sidewalls of the housing b, and said
center projection 4 is so shaped as to be capable of being engaged
in a central hollow section g.sub.3 in the frame member a of the
duct A. Inside the center projection 4, terminal plates 7a and 7b
having integrally formed contact pieces 6a and 6b, respectively,
are fixed by means of driving rivets 8a and 8b as isolated from
each other by an isolating wall 5. Said terminal plates 7a and
7with grooves 9a and 9b, respectively, into which clamp screws 11a
and 11b having terminal washers 10a and 10b screwed thereto,
respectively, are mounted. An end of each power supply wire (not
shown) will be inserted between each of the terminal plates 7a and
7b and the washers 10a and 10b and then the clamp screws 11a and
11b will be fastened so that the supply wires will be connected to
the terminal plates 7a and 7b. Further behind the mounting position
in the cap C of the above terminal plates 7a and 7b, that is,
substantially adjacent the other rear end of the cap C, there are
provided holes 12 and 13 for leading the power supply wires into
the cap. The contacting pieces 6a and 6b respectively formed
integrally with the terminal plates 7a and 7b are provided with
externally arcuated portions 14a and 14b at their respective
forward end which extending in reverse direction to the other rear
end at which the supply wires are led in the cap. At the base
portion of the center projection 4, a screw hole 15 is provided in
the cap C and a covering 17 is mounted over the cap C by means of a
mounting screw 16 screwed into said screw hole 15.
The connection between the above-described distribution duct A and
feed-in cap C will be established as shown in Fig. 3. That is, the
side projections 3a and 3b of feed-in cap C are fitted into the
spaces g.sub.1 and g.sub.2 of the duct A, respectively, the center
projection 4 is fitted into the hollow section g.sub.3 of the duct
A, so that the both members will be connected together and, in this
connected state, the arcuated portions 14a and 14b of contact
pieces in the feed-in cap C are resiliently brought into contact
with the conductors 2a and 2b of duct A, respectively, so that
required electric connection between the terminal plates 7a and 7b
receiving power supply from the supply wires and the conductors 2a
and 2b will be positively established and, at the same time,
mechanical joint relation of the feed-in cap C to the duct A will
be also able to be retained in a firm condition.
FIG. 4 shows another embodiment of the present invention, in which
an electric grounding plate member is additionally provided in the
embodiment as shown in Figs. 1 through 3. In this second
embodiment, the grounding plate 18 additionally mounted to the
feed-in cap C is formed to be provided with an inwardly arcuated
forward end 18a, an outwardly raised wedge portion 18b adjacent
said forward end 18a and a laterally extending wide portion used as
a terminal plate part 18c at the other end. In the middle of body
portion 18d, the grounding plate 18 is further provided with
mounting holes 18e.
The above grounding plate 18 will be placed in a complementary
recess 19 provided at outer wall of one of the side projections 3a
and 3b (in the illustration, the recess 19 is shown as provided on
the projection 3b) with its body portion 18d as engaged in the
recess 19, so that outer surface of the plate 18 will be on the
same plane with that of the projection 3a or 3b. The plate 18 is
then fixed to the cap C by means of rivets driven into the cap C
through the holes 18e. In the terminal plate part 18c, there is
provided a screw hole for engaging therein a clamp screw 20 so that
a separate grounding conductor will be able to be connected to the
plate 18 by said clamp screw 20 as fastened.
Referring to FIG. 5, in which the connecting state of the feed-in
cap C and the duct A in FIG. 4 is shown, it will be seen that the
arcuate forward end 18a of the grounding plate 18 is inserted in
the space g.sub.2 inside the duct A. This insertion of the arcuate
end 18a is carried out in such manner that the same will be
slidingly brought into contact with the metal housing b along its
inner wall of the duct A. At this time, the raised wedge portion
18b will be inserted into the same space g.sub.2 of the metal
housing b while scratching its inner wall. Therefore, even when the
wall gets rusted or is coated with such a bad conductor agent as a
paint or the like, the wedge portion 18b will be effective in
scratching off such bad conductor member from the wall so as to
retain a positive electric connection between the housing b and the
grounding plate 18. Thus, the metal housing b of the duct will be
effectively connected to the grounding conductor through the
grounding member 18, so that any accidents of electric shocks due
to electric leakage to the housing will be well prevented from
occurring.
Referring now to FIG. 6, a further embodiment in which the
connector means of the present invention is utilized for jointing
two of the distribution ducts A.sub.1 and A.sub.2 for electric
connection, will be described. It will be appreciated that in this
embodiment the ducts A.sub.1 and A.sub.2 are formed exactly in the
same structure with that of the duct A as described in the
foregoing.
In the drawing, B is a joiner utilizing the connector means
according to the present invention, and its structure substantially
corresponds to the one in which a pair of the connecting mechanism
sections in the above described feed-in cap C is arranged in
bilaterally symmetrical relation to each other. That is, the joiner
B comprises an insulator base member f provided at an end with a
center projection 21 and both side projections 22a and 22a', at the
other end with a center projection 21' and both side projections
22b and 22b', and along both sides with grooves 23a and 23b, and
contact pieces 24a and 24b to be respectively mounted in each of
said grooves 23a and 23b.
Said contact pieces 24a and 24b are so formed as to have at both
ends outwardly arcuated portions 25a and 25b and at their middle
position bent plate portions 26a and 26b, respectively. Said bent
plate portions 26a and 26b of the contact pieces 24a and 24b will
be engaged in respective recesses 27a and 27b provided on upper
surface (as in the drawing) of the insulator base member f, so that
the contact pieces 24a and 24b will be prevented from being removed
in longitudinal direction. A cover member h to be mounted over the
insulator base f for covering the same will be fixed to the base
member f by means of a mounting screw 29 screwed into a screw hole
28 made in the base member f. It will be appreciated that said
cover member h is employed for the purposes of preventing any
electroconductive part from being exposed and also preventing the
contact pieces 24a and 24b from being moved in mounting direction
of the cover member h, i.e., in vertical direction to the member
h.
The insulator base member f is also provided with a longitudinal
recess 30 at the lower surface of the member in the drawing (in
practical use, this surface will be the upper surface). Mounted in
this recess 30 is a grounding bond member D. Coupling of said
grounding member D to the base member f will be established by
means of mounting screws 35 and 36 screwed and fastened into screw
holes (33 and 34) of the bond member D through corresponding holes
31 and 32 made in the base member f. Both ends of the grounding
bond member D are brought into contact with each of the housings b
and b' of the distribution ducts A.sub.1 and A.sub.2 to be coupled
together, when the joiner B is mounted therebetween. Therefore,
electric interconnection between both the housing b and b' will be
positively carried out and required grounding work at the time of
coupling the ducts can be readily done only at one position.
Respective interconnections between the above joiner B and both of
the distribution ducts A.sub.1 and A.sub.2 are established in such
a manner as shown in FIGS. 7A and 7B. That is, the insulator base
member f of the joiner B is coupled to each of the ducts A.sub.1
and A.sub.2 in such that each of its center projections 21 and 21'
will be engaged in each of hollow sections g.sub.3 of the ducts
A.sub.1 and A.sub.2. In this coupling state, the arcuate portions
25a and 25b of contact pieces 24a and 24b extending in both endwise
directions of the joiner will be brought into resilient contact
with respective ones of the conductors 2a and 2b in each one of the
ducts A.sub.1 and A.sub.2 so as to establish a positive electric
connection between corresponding ones of the conductors of the
ducts A.sub.1 and A.sub.2 and, at the same time, a mechanically
firm and stable coupling between the joiner B and the respective
ducts A.sub.1 and A.sub.2 . The grounding bond member D secured to
reverse surface of the base member f will be brought at its both
ends into surfacial contact with each of inner surfaces of the
metal housings b, b' exposed inside the hollow sections g.sub.3 of
the ducts, so that these metal housings b, b' of separate ducts
will be made to be electrically integral with each other upon being
coupled together by means of the joiner B.
It should be appreciated here that, while the grounding bond member
D is shown to be used in the above embodiment of FIGS. 6 and 7,
such a grounding plate member 18 as shown in FIGS. 4 and 5 may also
be alternately employed. In such case, the arcuate end 18a having
the wedge 18b should be provided at the other end of the member 18,
and the terminal plate section 18c may be omitted.
It should be also noted that the side projections 3a and 3b (FIG.
1) may also be omitted if the center projection 4 or projections 21
and 21' (FIG. 6) may be formed to be of a size sufficient to
closely engage or fit in the central hollow space g.sub.3 of the
duct, or of a length sufficient to firmly maintain a stable
mechanical coupling between the connector means and the duct.
Thus, according to the present invention, the electric connection
and mechanical coupling between each of a plurality of the
distribution ducts and between the power feed-in cap and the duct
can be firmly and stably performed simply by an engaging or
fitting-in operation.
* * * * *