US3059059A - Marking spring arrangement for crossbar switches - Google Patents

Marking spring arrangement for crossbar switches Download PDF

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Publication number
US3059059A
US3059059A US665778A US66577857A US3059059A US 3059059 A US3059059 A US 3059059A US 665778 A US665778 A US 665778A US 66577857 A US66577857 A US 66577857A US 3059059 A US3059059 A US 3059059A
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United States
Prior art keywords
marking
spring
selecting
bow
marking spring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US665778A
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English (en)
Inventor
Bernutz Johannes
Gunst Alfred
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International Standard Electric Corp
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International Standard Electric Corp
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Filing date
Publication date
Application filed by International Standard Electric Corp filed Critical International Standard Electric Corp
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Publication of US3059059A publication Critical patent/US3059059A/en
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Classifications

    • 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
    • H01H67/26—Co-ordinate-type selector switches not having relays at cross-points but involving mechanical movement, e.g. cross-bar switch, code-bar switch

Definitions

  • This invention relates to marking spring arrangements for crossbar switches employed in telecommunication systems and particularly telephone systems.
  • crossbar switches incorporate a stationary spring set contact bank.
  • selecting bars with marking springs or marking fingers which are used for marking the desired contacts.
  • connecting bars which are arranged vertically in relation to the selecting bars.
  • the marking springs oscillate for a certain period of the order of some milliseconds, in their plane of actuation. tions of the marking springs should be as short as possible, in order to achieve proper operation during the marking process, and to achieve as short as possible selecting times.
  • each marking spring in its normal position, rests with a certain pretension on a supporting arrangement, which is individually assigned to it and is arranged on the selecting bar.
  • This supporting arrangement which is made in the shape of a bow, consists of a corrosionproof wire or sheetmetal member, is mounted on the selecting bar, and follows the movement of the bar during the marking process. The arrangement ensures that during the marking process there will not be caused any friction between the marking spring and the bow-shaped member.
  • the marking spring rests with a predetermined pretension on the supporting bow, and at its free end, is slightly lifted off the bridge armature. No sooner than during the switching process the marking spring is seized by the armature of the connecting magnet and is utilized for the actuation of the respectively marked contact assembly, whereby this spring is lifted off its supporting arrangement.
  • FIG. 1 shows an arrangement according to the invention comprising a marking-spring resting on a bow-like member individually assigned to this spring and mounted on the selecting bar;
  • FIG. 2 shows one embodiment of an adjustable form of supporting bow according to the invention.
  • F168. 3 through 6 show the behaviour of the markingspring arrangement according to the invention in different stages of functioning during one selecting process
  • FIG. 7 shows one embodiment and FIG. 8 shows another embodiment of an adjustable form of supporting bow according to the invention.
  • the speedy and frictionless operation of the marking spring is required, not only because in the case of multiswitches the selecting processes have to be handled successively and because, therefore, a quick completion of the individual selecting operations is desirable, but also because in cases where there are employed particularly quick acting electronic switching means, an acceleration of the selecting and switching processes becomes still more desirable. This is of a special importance because the marking spring, when resting on a fixed support with a coarse or unpolished surface, will not follow quickly enough the movements of the selecting bar during the selecting or switching operations.
  • FIG. 1 shows a portion of a multiswitch, comprising a part of the selecting bar 1 which, according to requirements, may be swivelled either in the direction A or B.
  • a marking spring 2 On this selecting bar there is mounted a marking spring 2, which is provided with an individual damping element 3. In the normal condition the marking spring rests against a wire how 6 and is mounted on the selecting bar 1.
  • the bow 6 raises the free end of marking spring slightly off the connecting bar 4.
  • the mounting of this wire bow 6 directly on the selecting bar 1 ensures that the marking spring, during the swiveling of the selecting bar in the course of the marking process, will not slide on the Supporting bow, but that when it springs back to normal, it is clamped by the frictional forces between the spring and the bow.
  • FIGS. 3-6 there is shown the behaviour of the marking spring with respect to the supporting how during the several individual phases of functioning during a selecting operation.
  • the selecting bar 1 is shown in its normal position and the marking spring 2 is lying in the middle between the two straps 7 and 7. These two straps, during the switching through process, serve to actuate the desired contact set. Depending on whether the marking spring is swivelled upwardly or downwardly either the upper or the lower contact set, not shown in the figures, will be switched through.
  • FIG. 4 shows the selecting bar 1 in the upper marking position, whereby the marking spring 2 and the bow 6 have followed the movement of the bar without having caused any mutual friction.
  • the marking spring 2 therefore, has placed itself below the upper strap 7. If the armature of the connecting magnet, not shown in this drawing, is now moved vertically in relation to the plane of the drawing, then the marking spring 2 is lifted off its support and is retained by the strap 7 and the bridge armature, so that the associated contacts (not shown) will be connected through.
  • FIG. 5 shows the condition in which the desired contact set is actuated, but the selecting bar 1 has returned to its normal position, i.e. to its mid-position.
  • the marking spring 2 will remain clamped between the armature of the connecting magnet and the strap of the actuated contact set.
  • the resilient or elastic marking spring 2 jumps back after the interruption of the connection on account of the de-energization of the connecting magnet, the oscillations of the marking spring will be dampened by the friction produced at the bow 6.
  • this bar is swivelled in the course of another selecting process in the opposite direction, viz. in this case downwardly, then there will be likewise caused no friction between the retained marking spring 2 and the associated bow 6. In this case the marking spring 2 will merely be elastically deformed (as at 2 in FIG. 6).
  • FIG. 2 there is shown a modification in which the supporting bow 6 is mounted, an adjustable tongue 8 formed in the selecting bar 1, and on which the marking spring 2 associated with the bow is also mounted.
  • the mounting of the bow to this tongue can be accomplished either by soldering or welding.
  • the tongue 8 on the bar 1 is appropriately formed on the front side, so that the tongue will be easily accessible for adjusting purposes.
  • the supporting bow 6 itself should appropriately consist of a corrosionproof wire.
  • FIG. 7 there is shown the example of an embodiment in which the supporting bow 6 is replaced by a supporting arrangement 6a consisting of one single piece of sheet metal made of corrosion-proof metal.
  • This supporting member 6a is provided at its lower end with a correspondingiy bent mounting member 9, which is attached e.g. by soldering or welding, or in any other suitable Way to the tongue-shaped member 8a of the selecting bar 1.
  • the supporting arrangement 6a is arranged with its portion 10 in parallel with the marking spring 2 and is slightly bent towards this spring at 11. This bent portion is gradually enlarged up to the edge 12, which is slightly bent backwardly, so that the spring 2 will come to lie on the slightly arched smooth surface 12a.
  • marking spring arrangement for crossbar switches used in telecommunication systems wherein said marking spring is mounted on a selecting bar, comprising an oscillation damping member individual to said marking spring and mounted on said selecting bar, said marking spring pre-tensioned to abut against said member and free to move laterally independently of said member, said damping member having a surface sufficiently large for said marking spring to abut against while said selecting bar is in any of its possible positions and said marking springis in selecting position, whereby oscillation of said marking spring is inhibited during selecting or releasing operations of said marking spring.
  • damping member comprises a tongue-shaped sheet metal part of corrosion-proof material, which is provided with a bead adjacent the point of a contact of the marking spring.

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  • Electromagnets (AREA)
US665778A 1956-06-28 1957-06-14 Marking spring arrangement for crossbar switches Expired - Lifetime US3059059A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEST11348A DE1017213B (de) 1956-06-28 1956-06-28 Anordnung fuer Markierfedern an Koordinatenschaltern

Publications (1)

Publication Number Publication Date
US3059059A true US3059059A (en) 1962-10-16

Family

ID=7455366

Family Applications (1)

Application Number Title Priority Date Filing Date
US665778A Expired - Lifetime US3059059A (en) 1956-06-28 1957-06-14 Marking spring arrangement for crossbar switches

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US (1) US3059059A (en(2012))
BE (1) BE558637A (en(2012))
CH (1) CH351639A (en(2012))
DE (1) DE1017213B (en(2012))

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3387106A (en) * 1965-08-27 1968-06-04 Plessey Co Ltd Slide action switch mechanism

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1161955B (de) * 1960-09-14 1964-01-30 Zaklady Wytworcze Urzadzen Tel Markiermechanismus fuer Koordinatenmehrfachschalter in Fernmeldeanlagen, insbesondere Fernsprechvermittlungsanlagen
BE633997A (en(2012)) 1962-06-26

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9874C (de) * A. J. BIRJUKOW in Odessa und A. WERNICKE in Halle a. d. Saale Macerations- und Diffusionsgefäfse für Rübenschnitzel oder andere Substanzen, mit horizontaler Durchflufsbewegung der auslaugenden Flüssigkeit
US2039630A (en) * 1935-07-20 1936-05-05 Bell Telephone Labor Inc Selective switch
US2117702A (en) * 1936-10-06 1938-05-17 Bell Telephone Labor Inc Switching mechanism
US2166764A (en) * 1936-10-10 1939-07-18 Bell Telephone Labor Inc Switching mechanism
US2735896A (en) * 1956-02-21 Damping means for selecting fingers

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2577067A (en) * 1948-02-17 1951-12-04 Kellogg Switchboard & Supply Crossbar switch
US2611827A (en) * 1949-12-03 1952-09-23 Kellogg Switchboard & Supply Crossbar switch

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9874C (de) * A. J. BIRJUKOW in Odessa und A. WERNICKE in Halle a. d. Saale Macerations- und Diffusionsgefäfse für Rübenschnitzel oder andere Substanzen, mit horizontaler Durchflufsbewegung der auslaugenden Flüssigkeit
US2735896A (en) * 1956-02-21 Damping means for selecting fingers
US2039630A (en) * 1935-07-20 1936-05-05 Bell Telephone Labor Inc Selective switch
US2117702A (en) * 1936-10-06 1938-05-17 Bell Telephone Labor Inc Switching mechanism
US2166764A (en) * 1936-10-10 1939-07-18 Bell Telephone Labor Inc Switching mechanism

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3387106A (en) * 1965-08-27 1968-06-04 Plessey Co Ltd Slide action switch mechanism

Also Published As

Publication number Publication date
DE1017213B (de) 1957-10-10
CH351639A (de) 1961-01-31
BE558637A (en(2012))

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