US3060274A - Code relay selector - Google Patents

Code relay selector Download PDF

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Publication number
US3060274A
US3060274A US703901A US70390157A US3060274A US 3060274 A US3060274 A US 3060274A US 703901 A US703901 A US 703901A US 70390157 A US70390157 A US 70390157A US 3060274 A US3060274 A US 3060274A
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United States
Prior art keywords
code
bars
relay
selector
rocking
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Expired - Lifetime
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US703901A
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English (en)
Inventor
Alexandersson Harald Valdemar
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Telefonaktiebolaget LM Ericsson AB
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Telefonaktiebolaget LM Ericsson AB
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H67/00—Electrically-operated selector switches
    • H01H67/22—Switches without multi-position wipers
    • H01H67/32—Switches without multi-position wipers having a multiplicity of interdependent armatures operated in succession by a single coil and each controlling one contact or set of contacts, e.g. counting relay

Definitions

  • the selectors used in telephone equipment can, considering the fundamental performance of the contacts, be divided into two groups; namely selectors with sliding contacts and selectors with push contacts.
  • the last mentioned group of selectors are usually regarded as the better type but have been difficult and expensive to manufacture and install in small spaces.
  • the most popular of the push contact selectors is the cross bar switch, in which relays are placed along two rectangular co-ordinates. The size of these selector switches is mainly determined by the space requirement of the relay magnets. It is, therefore, an object of the present invention to provide a selector, which embodies the good contact properties and operating velocity of the cross bar switch, but which may be manufactured at a relatively low cost and can be installed 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 selected by a code system consisting of a number of movable code bars running along the relays and being controlled by a number of code magnets.
  • the present invention is mainly characterized by providing each spring set of these connecting relays with a rocking arrangement to control the adjustment of the code system and which in dependence hereof can be related to the code system in such a way that the rocking arrangement of the armature of the connecting relay is disengaged from the code system and is set to adjust its spring set.
  • the code system will in this way be completely disengaged so that it can be used for adjustment of other spring sets.
  • FIG. 1 shows a front view of the whole selector
  • FIG. 2 a section through the selector
  • FIG. 3 a perspective view of a detail of the selector.
  • FIG. 4 shows a detail of a modified selector.
  • the selector is supported upon a mounting plate 1 upon which ten connecting relays 2 with associated armatures 3 are fixed.
  • a multiple 4 which is fixed on the plate 1 by a U-shaped plate girder 5 that is coextensive with the plate 1.
  • Each multiple consists of a number of wire spring sets situated close to each other, seventeen such wire spring sets being shown for purposes of illustration.
  • One such wire spring set is shown in FIG. 2 to include twelve stacked wire springs 6 and a lifting bar 7, which actuates these twelve springs.
  • the rear terminal portions of the wire springs are fixed in insulating plates 8 while the front portions thereof can usually make contact with a corresponding number of bars in a fixed bar stand 9. These twelve bars extend across the multiple in parallel relationship.
  • An L-shaped rocking lever 10 is mounted upon a pivot shaft 11 beneath each lifting bar 7 of the selector, and are retained in a rest position by individual springs 12. and a rocking iron strip 13 running along the selector.
  • Movable code bars 14 running along the selector are mounted upon the U-shaped girder 5. These bars consist of thin steel tapes, which at the upper edge are provided with teeth or grooves according to a code system 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 displaces the respective control bar. Such control of the bars is well known in the art (see for instance Patent 2,317,469).
  • the selector operates in the following way:
  • rocking lever actuated within the corresponding multiple is lifted but no other.
  • the rocking lever in its turn lifts the associated lifting bar 7 and the contact springs 6 controlled by this lifting bar.
  • the rocking lever is disengaged from the code bars as shown by the second rocking lever from the right in FIG. 3, and as soon as the rocking iron strip 13 returns to its initial position, all the corresponding rocking levers are lifted from the code bars which rocking levers then go back and return to their rest positions, when the code magnets 15 are demagnetized. Only the actuated rocking lever and its movable contact spring remain in an active position, until the corresponding armature is released.
  • the code bar slots can be brought into register beneath any selected other lever 10 in the manner described and such lever can then be moved as explained for the second 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 way as described. This can also be done, even if a rocking lever is restored in an active position at the first actuating connecting relay, as this rocking lever is disengaged from the code bars.
  • two spring sets can, of course, be actuated by the same relay, if so-called group selection in the multiple is to be applied.
  • the code system is divided in two groups, one group including four code magnets, which select the individual spring set and one group comprising two code magnets, which select the spring group set.
  • Six incoming lines are then, for instance, connected in parallel, on one hand, to six upper contact springs in the first wire spring set and, on the other hand, to six lower contact springs in the second spring set.
  • the code bars will be adjusted in such a way that at the operation of the corresponding connecting relay, the second rocking lever is lifted up and actuating its contact spring set, and the code bars are adjusted so that a further rocking lever is operated and actuates one of the remaining fifteen contact spring sets.
  • a set of incoming lines (six lines) can thus be connected to any of twice fifteen outgoing Wire groups (each having six wires).
  • the multiple gets thirty, six-line output groups.
  • each multiple can be divided for instance in three or four groups. In the preceding case the multiple will contain three times fourteen, fourline output Wire groups and in the latter case four times 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 certain advantages appear from a constructive view.
  • a relay armature can cause all rocking levers as sociated with the relay to control the adjustment of the code system.
  • 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.
  • the relay armatures can be constructed so that in a released position they disengage all non-actuated rocking levers from the code system for use in the next selecting movement.
  • FIG. 4 An example of the foregoing construction is shown in FIG. 4.
  • a connecting relay 20 of a flat armature type is provided.
  • the selector is constructed in the manner shown in FIG. 1 by a number of such connecting relays situated close to each other.
  • the relay armature 21 includes an angularly related leg 22, which in the released position 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.
  • all associated rocking levers 26 are turned and make contact with the code system by the springs 24.
  • the selected rocking levers continue into the grooves in the bars 23 of the code system.
  • 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 bars movable relative to each other and extending alongside said connecting relays, code magnets and controlling the movement of each one of said code bars relative to the others, a rocking lever associated with each one of said wire spring sets, means controlling the state of energization of said connecting relays, said relays in one state 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 sets.
  • 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 bars movable relative toeach other and extending alongside said connecting relays, code magnets for controlling the movement of each one of said code bars relative to the others, a rocking lever associated with each one of said Wire spring sets, energization of said connecting relays acting upon said rocking levers to rotate said rocking levers toward said code bars, predetermined relative alignment of said code bars causing movement of said associated rocking levers into engagement with said code bars, and de-energization of said connecting relays lifting said rocking levers from said code bars to actuate each said associated wire spring set.

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  • Knitting Machines (AREA)
  • Structure Of Telephone Exchanges (AREA)
US703901A 1956-12-29 1957-12-19 Code relay selector Expired - Lifetime US3060274A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE832865X 1956-12-29

Publications (1)

Publication Number Publication Date
US3060274A true US3060274A (en) 1962-10-23

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Application Number Title Priority Date Filing Date
US703901A Expired - Lifetime US3060274A (en) 1956-12-29 1957-12-19 Code relay selector

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US (1) US3060274A (enrdf_load_stackoverflow)
BE (1) BE563311A (enrdf_load_stackoverflow)
GB (1) GB832865A (enrdf_load_stackoverflow)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2842621A (en) * 1953-04-10 1958-07-08 Ericsson Telefon Ab L M Indicating device for cross bar switches

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2842621A (en) * 1953-04-10 1958-07-08 Ericsson Telefon Ab L M Indicating device for cross bar switches

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Publication number Publication date
GB832865A (en) 1960-04-13
BE563311A (enrdf_load_stackoverflow)

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