close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2407373

код для вставки
"Sept. 10,1946.-~
_ 'E’.G.JOHANSSON
_ ’
_'2,407,372
DISCONNECT FOR ELECTRICAL'TERMINAL BLOCKS,
F'iled Jan: 6, 1945
]
éSheets-Sheet 1
'éh/akarwsam
'
_ Sept. 1704,. 1946.
'
1
'
v
J74
.
'
_
v
\
‘Jan.
'
_
PISCONNECT
|_:. GVJOHANss'ON
FOR ELECTRICAL
'
'
2,407,372
TERMINAL BLOCKS
Fil_ed ‘Jan. 6, ‘1945
07.14;" "
.
’
v
'
v
ésheexs-shept 2
4,?~
45
®.
' $41
fry/2M’
ié'mi?ela'msan' '
MMVW
'
Patented Sept. 10,‘ 1946
'
UNITED
2,407,372
STATE S
PATENT OFFICE
2,407,372
DISCQNNECT FOR ELECTRICAL TERMINAL
BLOCKS
Ernest G. Johansson, Belmont, Mass, assignor to
Anchor Manufacturing Company, Boston,
Mass, a corporation of Massachusetts
Application January 6, 1945, Serial No. 571,615
11 Claims, (of. zoos-15s)
1
2
In meter boxes for service entrance installa
Fig. 2 is a side elevation of the test block
with its conductors held in contact with each
tions and the like it is customary to provide a
other by the connector;
test block for use in testing the meter from time
Fig. 3 is a similar view showing the connector
to time. In making these tests the service wires
'
and load wires are temporarily disconnected from 5 in open circuit position;
Figs. 4 and 5 are top and side views of a modi
the meter while it is being tested.
Objects of the present invention are to pro
?ed test block;
‘
,
Figs. 6 and 7 are top and. side views of an
vide a test block which is simple and economical
other modi?ed test block; and
‘
in construction, which is e?icient and facile in
Fig. 8 is a circuit diagram.'
7
use, which permits the .meter to be disconnected 10
The particular embodiment of thev invention
quickly and easily, which minimizes the danger
illustrated in Figs. 1, 2 and 3 comprises a meter
of short-circuit or injury to the operator, which
box I having the upper portion of its front side
canbe repaired without disassembling the en
closed by a wall 2 provided with an opening
tire block, which provides good electrical con
ductivity Without danger of overheating, and 15 through which projects the glass cover 3 of the
meter and having a doorv4 .to close‘the lower
which is generally superior to prior test blocks.
portion of its front side, theldoor being hinged
According to the present invention the block
to the sides of the box at 6 so as to swing down
comprises two conductors, preferably in the form
,wardly to the open position shown in Fig. 1.
of straps, means for supporting the conductors in
spaced overlapping relationship, a connector'piv 20 The test block mounted in the lower portion
of the box. comprises a block 1 of insulation
otally mounted on one conductor to swing into
and out of conducting position relative‘to the ' mounted on the back 8 of the box through the
other conductor, a head on the connector which
medium of a metal plate 9 which is secured to
the back by means of rivets II. The block ‘I is
overlaps the second conductor when the connec
tor is swung into said conducting position, and 25 secured to the plate 9 by means of bolts [2 hav
ing their heads seating in recesses I3 in‘ the front
means on the connector for moving the head so
that the ?rst conductor can clamp the second
conductor between the head and the ?rst con
side of the block. Mounted on the front side
of the block are four pairs of conductors l4 and
I5, the conductors being held in place by screws
ductor, one of the conductors being ?exible to
permit it to move toward the other conductor 30. I 6 extending through the block from the back
and threading into the portions of the conduc
in response to said movement of the head.
tors, which engage the front of the block.
Preferably the connector comprises two heads
Mounted on each conductor I4 is a U-shaped
member I‘! having its legs extending into a re
a threaded connection, one head being cylindri
cal and one conductor having a cylindrical bear 35 cess in the front of the block 1 and having open
ings l8 in its legs to receive the conductor l4.
ing vin which the cylindrical head rotates to
Threaded into the yoke is a screw l9 adapted to
swing the other head into‘and'out of overlap
clamp a wire against the conductor M. The up
ping relation to the other conductor, the thread
7 per end of the conductor I4 extends forwardly
ed connection serving as the aforesaid means for
moving one head toward the other, head. In 40 away from the block 1 and is then bent rear
wardly to form a cylindrical bearing 2|, the for
the preferred embodiment the cylindrical bear-1
ward side of the bearing being provided with a
ing is formed by bending one of the strap con
central circumferential slot 22. Mounted in the
ductors into cylindrical form and the shank ex
bearing 2| is a cylindrical head 23 and threaded
tends through a circumferential slot in the bear
ing and threads into the cylindrical head, where 45 into the cylindrical head through the slot 22 is
by the cylindrical head may be slipped endwise
a shank 24 having a head 26 fast to its forward
end. The conductor l5 has a forward part ex
out of the cylindrical bearing after the shank
tending approximately parallel to the block ‘I,
has been threaded out of the cylindrical head.
This'permits ready replacement or repair of the
the lower end of this forward part overlapping
parts subjected to the most wear.
~ 50 the upperend of the conductor 14 but being
For the purpose of illustration typical embodi
spaced therefrom as shown in Fig. 3. The lower
' endoflsaid part is provided with a slot 26 to
ments of the invention are shown in the accom
panying drawings in which
.
receive the shank 2,4 and means 21 are provided
to connect the conductor l5 with a conductor
Fig. 1 is a front elevation of a meter box with‘
55 ‘28 leading to the meter.
the front cover open;
and a connecting shank joined to one head by I
2,407,372
r,
:3
When the connector 24 is in the position shown
in Fig. 3 the circuit is open. To close the circuit
the connector is swung to a position perpendic
4
than the full cross-sectional area of the conduc
tors.
Constructions like those of Figs. 4 to 7 afford
ular to the block ‘I and then threaded into the
the further advantage that the two terminal
cylinder 23 to clamp the conductor 55 against
conductors have correspondingly shaped faces
disposed in approximate parallelism so that con
the conductor Hi. The head 26 seats flatwise on
the upper side of strap is, the cylindrical head
23 engages the cylindrical bearing of strap I4
throughout almost its entire circumference and
tact is established throughout a wide area when
the two conductors are clamped together in face
to face contact.
of course the parts are drawn tightly together 10 ' From the foregoing it will be understood that
the cylindrical portions of the aforesaid cylindri
when the connector is threaded into the head.
cal bearings and heads need not extend through
23. Thus excellent conductivity is established.
180°. Thus in Fig. 5 the cylindrical portion of
Moreover the ?exibility of the conductor 25 tends
the bearing in strap 32 extends only through ap
to pull the heads away from each other thereby
eliminating the need of a lock-washer to prevent 15 proximately 180". However it is desirable that
substantial portions of the parts he cylindrical
accidental rotation of the head 26 even when it
to provide better electrical contact and to guide
is not tightly seated in clamping position. To
the swinging movement more accurately.
open the circuit it is necessary merely to loosen
It should be understood that the present dis
the connector 26 and swing it to the position
closure is for the purpose of illustration only and
shown in Fig. 3, the flexibility of the conductor
that this invention includes all modi?cations and
25 opening the circuit automatically and abrupt
equivalents which fall within the scope of the ap
ly. After the circuits have been opened the me
pended claims.
ter may be tested in the usual way by connecting
I claim:
the test apparatus to the posts l9 and 21.
1. An electrical terminal block comprising ?rst
The modi?cation shown in Figs. ll and 5 com
and second conductors, means for supporting the
prises a block 3| carrying two conductors 32 and
conductors in spaced relationship with one con
33 and terminal posts 35 and 35. The forward
ductor overlapping the end of the other conduc~
end of the conductor 32 is shaped to form a bear
tor, said end having a recess, a connector pivot
ing which is cylindrical throughout 180°. Fitting
in the bearing is a cylindrical head 35 and 30 ally mounted on the ?rst conductor to swing into
and out of said recess, a head on the connector
threaded into the head 36 is a shank 37 having a
which overlaps the second conductor when the
head 38. To open the circuit the shank 3‘? is
connector is swung into said recess, and means on
unscrewed to the position shown in Fig‘. 5 and
the connector for moving said head toward the
then swung to the broken line position. By shap
?rst conductor to clamp the second conductor be
ing the conductor 33 as shown in Fig. 5 it has
tween the head and the ?rst conductor, one of
somewhat more ?exibility than the correspond
the conductors being ?exible to permit it to move
ing conductor 15 in the ?rst embodiment.
toward the other conductor in response to said
The modi?cation shown in Figs. 6 and 7 is like
movement of the head.
that shown in Figs. 4 and 5 except in that the
2. An electrical terminal block comprising two
conductors t2 and 43 are shaped differently to 40
conductors, means for supporting the conductors
make a device which is somewhat more compact
in spaced overlapping relationship, and a con
and in which each conductor is flexible toward
nector including two heads and av connecting
and from the other.
shank joined to one head by a threaded connec
In the circuit diagram shown in Fig. 8, l4 and
tion, one head being cylindrical and one conduc
i5 represent the conductors M and I5 of the ?rst
tor having a cylindrical bearing in which the cy
embodiment or the conductors 32 and 33 of the
lindrical head rotates to swing the other head in
second embodiment of the conductors 42 and 1S3
to and out of overlapping relation to the other
of the third embodiment. The three conductors
conductor, one conductor being ?exible to per
44 constitute the supply circuit and the conduc
mit it to move toward the other conductor when
tors £35 constitute the load circuit. The meter
the heads are drawn toward each other by said
coils are indicated at 45 and the connections be
threaded connection, whereby the two conduc
tween the meter and the meter socket are indi
tors may be clamped together in good conduct
cated at 41, the illustration involving a meter of
ing relationship or permitted to spring apart in
the plug-in type.
From the foregoing it will be evident that the 55 open circuit relationship.
3. An electrical terminal block comprising two
connector may be removed merely by unscrew
conductors, means for supporting the conductors
ing the bolt from the cylindrical head and then I
in spaced overlapping relationship, and a con
slipping the head endwise out of its bearing.
nector including two heads and a connecting
Thus the connectcr,_which is the part of the
block subjected to the most wear, may be re 60 shank joined to one head by a threaded connec
tion, one head being cylindrical and one conduc
placed easily without disassembling the entire
tor comprising a strap bent into a cylindrical
block.
bearing in which the cylindrical head rotates to
An important feature of the invention consists
swing the other head into and out of overlapping
in that the terminal conductors (l4 and [5 or 32 65
relation to the other conductor, one conductor
and 33 or 42 and 43) engage each other so that
being flexible to permit it to move toward the
current may ?ow directly from one to the other
other conductor when the heads are drawn to
through only a single junction. Thus the con
ward each other by said threaded connection,
nection offers less resistance to current ?ow than I
whereby the two conductors may be clamped to
in prior terminal blocks where the current must 70 gether in good conducting relationship or per
?ow through an intermediate conductor and
mitted to spring apart in open circuit relation
therefore through two junctions.
ship.
Another advantage consists in that, while the
4. An electrical terminal block comprising two
terminal conductors are slotted, the cross-sec
conductors, means for supporting the conductors
tional area of the current path is nowhere less 75 in spaced overlapping relationship, and a con
2,407,372
3
hector including two heads and a connecting
shank, one head being cylindrical and one con
ductor having a cylindrical bearing in which the
cylindrical head rotates to swing the other head
into and out of overlapping relation to the other
conductor, one conductor being ?exible to per
mit it to move toward the other conductor when
the heads are drawn toward each other by said
threaded connection and said shank extending
through a circumferential slot in said bearing
and threading into the cylindrical whereby the
cylindrical head may be slipped endwise out of
said cylindrical bearing after the shank has been
threaded out of the cylindrical head.
6
, swing into and out of conducting position rela- “
tive to the other conductor, a head on the con
nector which overlaps the second conductor
when the connector is swung into said conduct
ing position, and means on the connector for
moving said head toward the ?rst conductor to
clamp said faces in direct contact with each
other, one of the conductors being ?exible to per- i
mit it to move toward the other conductor in re
sponse to said movement of the head.
8; An electrical terminal block comprising two
conductors, means for supporting the conduc
tors in spaced overlapping relationship, and a
connector including two heads and a connecting
shank,
one conductor comprising a strap bent in
5. An electrical terminal block comprising two to a. bearing and one’ of said heads being mount
conductors having contact faces, means for sup
ed in the bearing to swing into and out of over
porting the conductors in spaced overlapping re
lapping
relation to the other conductor.
lationship with said faces opposed to each other,
9. An electrical terminal block comprising two
a connector pivotally mounted on one conduc
conductors, means for supporting the conduc
tor to swing into and out of conducting position 20 tors
in spaced overlapping relationship, and a
relative to the other conductor, a head on the
connector including two heads and a connecting
connector which overlaps the second conductor
shank, one conductor comprising a strap bent
when the connector is swung into said conduct
into a bearing and the other conductor having a
ing position, and means on theconnector for
slot extending into it from one edge, one of said
moving said head toward the ?rst conductor to
heads being mounted in said bearing to swing
clamp said faces in direct contact with each
said shank lengthwise of said slot.
other, one of the conductors being ?exible to
10. An electrical terminal block comprising
permit it to move toward the other conductor in
two conductors, means for supporting the con
response to said movement of the head.
ductors in spaced overlapping relationship, and a
6. An electrical terminal block comprising two
connector including two heads'and a connecting
conductors having correspondingly shaped faces,
shank,
one conductor comprising a strap bent in
means for supporting the conductors in spaced
to a bearing, one of said heads being mounted in
overlapping relationship with said faces opposed
the bearing to swing into and out of overlapping
to each other, a connector pivotally mounted on
relation to the other conductor, and means for
one conductor to swing into and out of conduct 35 moving
one of said heads toward the other to
ing position relative to the other conductor, a
clamp the two conductors together.
head on the connector which overlaps the second
11. An electrical terminal block comprising
conductor when the connector is swung into said
two conductors, means for supporting the con
conducting position, and means on the connec
ductors in spaced overlapping relationship, and a
tor for moving said head toward the ?rst con 40 connector including two heads and a connecty
ductor to clamp said faces in direct contact with
ing shank, one conductor comprising a strap bent‘
each other, one of the conductors being ?exible
into a bearing and the other conductor having a
to permit it to move toward the other conductor
slot extending into it from one edge, one of said
in response to said movement of the head.
heads being mounted in said bearing to swing
'7. An electrical terminal block comprising two 45 said shank lengthwise of said slot, and means for
conductors having correspondingly shaped faces,
moving one of said heads toward the other to
means for supporting the conductors in spaced
overlapping relationship with said faces opposed
to each other in approximate parallelism, a con
nector pivotally mounted on one conductor to 60
clamp the ‘two conductors together.
ERNEST G. JOHANSSON.
Документ
Категория
Без категории
Просмотров
0
Размер файла
548 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа