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Патент USA US3060284

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Oct- 23, 1962
Filed Dec. '19, 1957
4 Sheets—Sheet l
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Oct. 23, 1962
Filed Dec. 19, 1957
4 Sheets-Sheet 2
Oct. 23, 1962
Filed Dec. 19, 1957
4 Sheets-Sheet 3
Oct. 23, 1962
Filed Dec. 19, 1957
4 Sheets—Sheet 4
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United States Patent O??ce
Patented Oct. 23., 1962
Harald Valdemar Aiexandersson, Lidingo, Sweden, as
signor to Telefonaktiebolaget L M Ericsson, Stockholm,
§wetien, a corporation of Sweden
for each connecting relay 2, so that the grooves in all the
code bars in front of a selected lifting bar coincide in a
certain determined position of the code bars relative to
each other. These code bars have two different positions,
a rest position and a working position and are controlled
by code magnets 15, the number of which are equal to
the number of bars. Control of the bars is effected by
individually connecting the bars to magnets 15 by means
of extensions 31 so that magnetization of each magnet
The selectors used in telephone equipment can, con 10 displaces the respective control bar. Such control of the
sidering the fundamental performance of the contacts, be
bars is well known in the art (see for instance Patent
divided into two groups; namely selectors with sliding
2,317,469). In the shown embodiment there are six
contacts and selectors with push contacts. The last men
code magnets each controlling a bar, of which only four
tioned group of selectors are usually regarded as the bet
are shown in FIGS. 2 and 3. The capacity of the code
ter type but have been dif?cult and expensive to manufac 15 system, i.e. the number of the setting positions for the
ture and install in small spaces. The most popular of
bars, is equal to 2}‘, where n is the number of bars.
the push contact selectors is the cross bar switch, in which
The selector operates in the following way:
relays are placed along two rectangular co-ordinates.
First a certain combination of code magnets 15 is actu
The size of these selector switches is mainly determined
ated, and the corresponding bars are moved to their work
lFiied Dec. 19, 1957, Ser. No. 763,991
@iairns priority, application Sweden Dec. 29, 1956
4 Claims. (Cl. 179-2754)
by the space requirement of the relay magnets. It is,
ing positions. Then the rocking iron strip 13 is turned
therefore, an object of the present invention to provide a
by means of magnets 16 placed on the ends of the strip.
selector, which embodies the good contact properties and
operating velocity of the cross bar switch, but which may
The springs 12 pressing against the rocking levers 10‘, urge
be manufactured at a relatively low cost and can be in
stalled in a relatively small space.
Another object of the present invention is to provide a
selector having a number of connecting relays, mounted
in a row upon a mounting plate and each provided with
a number of spring sets arranged in parallel, the spring
set to be actuated by the armature of a relay, being se 30
the upper horizontal arms thereof against the upper edge
of the bars 14, and as they are received within the grooves
of the code bars, the lower perpendicular arms of the
rocking levers are brought forward and somewhat over
an edge of the armature 3 as shown by the second arm 10
from left in FIG. 3. As the code bars are shaped in the
same way for each connecting relay with associated multi
ple, a corresponding rocking lever within each multiple
lected by a code system consisting of a number of mova
will be so displaced.
ble code bars running along the relays and being con
ond from the right in FIG. 3, is attracted, the rocking
lever actuated within the corresponding multiple is lifted
If now an armature 3, e.g. the sec
trolled by a number of code magnets.
The present invention is mainly characterized by pro
but no other. The rocking lever in its turn lifts the as
viding each spring set of these connecting relays with a 35 sociated lifting bar 7 and the contact springs 6 controlled
rocking arrangement to control the adjustment of the code
by this lifting bar. At this time the rocking lever is
system and which in dependence hereof can be related
disengaged from the code bars as shown by the second
to the code system in such a way that the rocking arrange
rocking lever from the right in FIG. 3, and as soon as the
ment of the armature of the connecting relay is disengaged
rocking iron strip 13 returns to its initial position, all the
from the code system ‘and is set to adjust its spring set.
corresponding rocking levers are lifted from the code bars
The code system will in this way be completely disengaged
which rocking levers then go back and return to their
so that it can be used for adjustment of other spring sets.
rest positions, when the code magnets 15 are demag
The invention will be described with reference to the
netized. Only the actuated rocking lever and its movable
accompanying drawings, which show an example of a se
contact spring remain in an active position, until the cor
lector according to the invention. FIG. 1 shows a front 45 responding armature is released.
view of the whole selector, FIG. 2 a section through the
The code Ibar slots can be ‘brought into register be~
selector and FIG. 3 a perspective view of a detail of the
selector. FIG. 4 shows a detail of a modi?ed selector.
The selector is supported upon a mounting plate 1
upon which ten connecting relays 2 with associated arma
tures 3 are ?xed. For each such relay 2 there is a multi
neath any selected other lever 10 in the manner described
and such lever can then be moved ‘as explained for the sec
ond lever from the right.
The code system can now be used again to select a new
wire spring set of another connecting relay in the same
ple 4, which is ?xed on the plate 1 by a U-shaped plate
way as described. This can also be done, even if a
girder 5 that is coextensive with the plate 1. Each
rocking lever is restored in an active position at the ?rst
multiple consists of a number of wire spring sets situated
actuating connecting relay, as this rocking lever is dis
close to each other, seventeen such wire spring sets be
engaged from the code bars. In each multiple with seven
ing shown for purposes of illustration. One such wire
teen parallel wire groups of twelve vertical springs, and
spring set is shown in FIG. 2 to include twelve stacked
with each wire group being used for connection of twelve
wire springs 6 and a lifting bar 7, which actuates these
incoming interconnecting lines, it is possible to obtain
twelve springs. The rear terminal portions of the wire
sixteen twelve-line outgoing wire groups.
springs are ?xed in insulating plates 8 while the front 60 Instead of only one spring set being actuated by a con
portions thereof can usually make contact with a corre
necting relay, two spring sets can, of course, be actuated
sponding number of bars in ‘a ?xed bar stand 9. These
by the same relay, if so-called group selection in the mul
twelve bars extend across the multiple in parallel relation
tiple is to be applied. In such a case the code system is
ship. An L-shaped rocking lever 10‘ is mounted upon a
divided in two groups, one group including four code
pivot shaft 11 beneath each lifting bar 7 of the selector, 65 magnets, which select the individual spring set and one
and are retained in a rest position by individual springs 12.
group comprising two code magnets, which select the
and a rocking iron strip 13 running along the selector.
spring group set. Six incoming lines are then, for in
Movable code bars 14 running along the selector are
stance, connected in parallel, on one hand, to six upper
mounted upon the U-shaped girder 5. These bars con
contact springs in the ?rst wire spring set and, on the
sist of thin steel tapes, which at the upper edge are pro
other hand, to six lower contact springs in the second
vided with teeth or grooves according to a code system
spring set. If now, for instance, six incoming lines are to
be connected to six lower outgoing lines in any of the
?fteen remaining spring sets within the same multiple,
the code bars will be adjusted in such a way that at the
operation of the corresponding connecting relay, the sec
ond rocking lever is lifted up and actuating its contact
spring set, and the code bars ‘are adjusted so that a fur
ther rocking lever is operated and actuates one of the re
maining ?fteen contact spring sets. In this way a set of
incoming lines (six lines) can thus be connected to any
lar reference to the construction shown in the drawing, it
is to be understood that such is not to be construed as
imparting limitations upon the invention, which is best
de?ned by the claims appended hereto.
I claim:
1. A code relay selector comprising, in combination, a
plurality of aligned connecting relays mounted upon a
mounting plate, a plurality of parallel wire spring sets
associated with each of said relays, a plurality of code
of twice ?fteen outgoing Wire groups (each having six l0 bars movable relative to each other and extending along
side said connecting relays, code magnets and controlling
wires). Thus the multiple gets thirty, six-line output
groups. In a similar way each multiple can be divided
the movement of each one of said code bars relative to
for instance in three or four groups. In the preceding
the others, a rocking lever associated with each one of
said wire spring sets, means controlling the state of ener~
case the multiple will contain three times fourteen, four
line output Wire groups and in the latter case four times 15 gization of said connecting relays, said relays in one state
thirteen, three-line outgoing groups. The suggested code
relay selector can thus work in a similar way as a cross
bar switch.
The code relay selector can also be constructed in
such a way that the spring sets are actuated, when the
connecting relays are released. By this operation cer
tain advantages appear from a constructive view. Upon
of energization acting upon said rocking levers to rotate
the same toward said code bars, placement of said bars in
predetermined alignment relative to each other moving
said associated rocking levers into engagement with said
code bars, changing said connecting relays to the other
state of energization lifting said rocking levers from said
code bars to actuate each of said associated wire spring
closing, a relay armature can cause all rocking levers as
sociated with the relay to control the adjustment of the
2. A code relay selector comprising, in combination, a
plurality of aligned connecting relays mounted upon a
mounting plate, a plurality of parallel wire. spring sets as
sociated with each of said relays, a plurality of code bars
movable relative to- each other and extending alongside
said connecting relays, code magnets for controlling the
code system. Thereby the rocking levers selected by the
code system come in such a position that at the release
of the armature they are actuated by the armature and
engage the associated spring sets. Moreover the relay
armatures can be constructed so that in a released position
they disengage all non-actuated rocking levers from the 30 movement of each one of said code bars relative to the
code system for use in the next selecting movement.
others, a rocking lever associated with each one of said
An example of the foregoing construction is shown in
FIG. 4. Instead of the knife-edge relay used according
Wire spring sets, energization of said connecting relays
to FIG. 2 a connecting relay 20 of a flat armature type
is provided. The selector is constructed in the manner
levers toward said code bars, predetermined relative align
shown in FIG. 1 by a number of such connecting relays sit
ciated rocking levers into engagement with said code bars,
and de-energization of said connecting relays lifting said
uated close to each other. The relay armature 21 includes
an angularly related leg 22‘, which in the released posi
tion of the armature according to FIG. 4 presses against
all rocking levers controlled by the relay 20 so that they
do not rest against the code system bars 23. When a
relay is energized and its armature 21 is actuated, all as
sociated rocking levers 26 are turned and make contact
acting upon said rocking levers to rotate said rocking
ment of said code bars causing movement of said asso
rocking levers from said code bars to actuate each said
associated wire spring set.
3. A code relay selector as set forth in claim 2, where
in said rocking levers of each said connecting relay are
normally urged toward an initial position out of engage
ment with said code bars.
4. A code relay selector as set forth in claim 2, further
with the code system by the springs 24. The selected
rocking levers continue into the grooves in the bars 23 45 comprising an armature means associated with each con
of the code system. When the relay becomes de-ener
necting relay for returning the respective spring set to an
gized, these rocking levers are lifted up by the spring 25
initial position in response to reenergization of the respec
through the leg 22 in a similar way as described in con
nection to FIG. 2. The rocking arrangements, which do
not engage within the grooves of the code bars, are turned
by the leg 22 so that they return to the position shown in
FIG. 4-. The code system‘ will in this way be disengaged.
While this invention has been described with particu
tive connecting relay.
References Cited in the ?le of this patent
Lundkvist et a1 _________ __ July 8, 1958
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