US2782270A - Contact spring group in electromagnetic connecting apparatus - Google Patents

Contact spring group in electromagnetic connecting apparatus Download PDF

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Publication number
US2782270A
US2782270A US395541A US39554153A US2782270A US 2782270 A US2782270 A US 2782270A US 395541 A US395541 A US 395541A US 39554153 A US39554153 A US 39554153A US 2782270 A US2782270 A US 2782270A
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United States
Prior art keywords
bar
spring
contact
comb
contact spring
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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
US395541A
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English (en)
Inventor
Wiberg Eric Axel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Application granted granted Critical
Publication of US2782270A publication Critical patent/US2782270A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/54—Contact arrangements
    • H01H50/56—Contact spring sets
    • H01H50/58—Driving arrangements structurally associated therewith; Mounting of driving arrangements on armature

Definitions

  • the present invention refers to electromagnetic connecting apparatus, especially telephone relays. It relates more exactly to contact spring groups for such apparatus, in which the fore, free ends of the springs are provided with toothed lifting bars for movable contact springs. Said bar is usually mounted between two additional springs, the object of which is to control the bar and determine its right position within the group. The object of the invention is to obtain better room in the group by making at least one of said additional springs superfluous. This is achieved by one of the movable contact springs being provided with a device for locking the lifting bar in said contact spring.
  • Fig. 1 is a perspective view of a contact spring group mounted on a relay.
  • Figs. 2, 3 and 4 illustrate in perspective different phases of the assembly of the lifting bar.
  • Fig. 5 shows the lifting bar.
  • Figs. 6, 7 and 8 show, in a detail of a movable contact spring provided with a locking device, the same phase of the assembly of the bar as in Figs. 2, 3 and 4.
  • the contact spring group shown in Fig. 1 is mounted on the yoke 3 of a usual electromagnetic telephone relay, the core 1 and the armature 2 of which are indicated on the drawing.
  • the group is constituted by a number of contact springs, which are in a known manner fastened in part of their length and electrically insulated from each other within a pile 4.
  • the free fore ends of the springs, which are provided with contacts, are kept at a determined distance from each other by means of a supporting bar 5 of insulating material provided with teeth and having a predetermined position in relation to the pile 4.
  • a toothed lifting bar 11 also of insulating material, for the transmission of the movement of the armature 2 to the movable contact springs 17, 18 of the group.
  • Such a supporting bar is mounted between two additional springs.
  • Such an additional spring 13 is shown in Fig. 1 highest in the group.
  • the other additional spring usually lies lowest in the group.
  • said last mentioned spring is replaced by a locking device for the lifting bar 11 on one of the movable contact springs 18.
  • said locking device consists of a recess 12, Figs. 6, 7 and 8, thus shaped on the fore part of the spring 18, that at assembly the lifting bar 11 is locked by means of'said recess.
  • the lifting bar 11, Fig. 5, is provided with a number of teeth 15, and between said teeth there are grooves 16, one or several of which are narrow, depending on to which one of the springs in the group 2,782,270 Patented Feb.
  • the lifting bar 11 is placed in the back of the holes or recesses in the contact springs 17, 18, 19, as shown in Fig. 2 and the detail of the spring 18 in Fig. 6.
  • the upper part of the bar is thereby made to rest against the contact point of the springs and is somewhat rotated, thereby attaining an intermediate position, shown in Fig. 3 and Fig. 7.
  • the end position shown in Fig. 4 and Fig. 8 is attained.
  • the teeth of the bar thereby come to lie under the movable contact springs 17 and 18, whereas the rigid springs 19 are not fastened to the bar.
  • the upper part of the bar will mesh into a rectangular hole 14, in the additional upper spring 13.
  • Said hole constitutes the control for the upper part of the bar during the lifting movement caused by the armature 2 and prevents a further rotation of said bar. Since the bar is now prevented from rotating, it cannot leave the recess 12 of the lower movable contact spring. Owing to the shape of said recess the bar can move neither forwards nor backwards. Since, further, the groove 16 in Fig. 5, in which the spring 18 has been introduced, is negligibly wider than the thickness of the spring, the position of the bar is definitely fixed. When the armature operates, the bar 11 moves upwards and carries with itself all the movable contact springs, which have been given a slight initial tension downwards, so as to restore the bar 11 to initial position when the armature releases.
  • the bar has been locked to the lower movable spring 18. It may naturally be locked to some other spring, for example the one which lies right opposite another of the narrow grooves 16 on the bar, Fig. 5.
  • the proposed locking device needs not either necessarily be shaped as the proposed recess 12. It may consist of a recess having some other shape or of some flap on the spring, which is moved into a groove on the bar, or of some other suitable device for determining the position of the bar.
  • the additional spring 13 may also be omitted.
  • Said upper contact spring is thereby provided with a recess corresponding to the recess 14 and the lifting bar with. an upper tooth, which after the mounting of the bar in end position forms a shoulder for said movable upper contact spring.
  • a switching device of the class including a plurality of substantially stationary switching blades and a plurality of coacting movable switching blades alternately stacked in spaced relationship electrically insulated from each other, each of said switching blades having a free contact end and an intermediate slot, and an axially movable lifting comb extending through said slots and engaging with its teeth the movable blades for flexing the latter into and out of engagement with the stationary blades upon movement of said comb, one movable switching blade with an intermediate slot having an approximate peripheral outline of two rectangles in longitudinally and laterally staggered relationship, one of said rectangles defining a guide portion and the other a retaining portion, the maximum width of the slot being wider than the thickness of the comb and the maximum length of the slot being longer than the width of the comb, the combined peripheral outline of the slot portions and the peripheral outline of the comb being correlated so as to permit movement of the comb from the guide portion into the retaining portion by lateral dis placement of the comb towards the contact end of the respective blade and
  • a switching device according to claim 1 wherein the edge of the rectangles adjacent to the contact end of the respective blade includes a slanted wall portion facilitating axial turning of the comb.
  • a switching device according to claim 1, wherein the comb includes two teeth spaced by an axial distance fitting the thickness of the blade having said slot formed with the guide portion and the retaining portion.
  • a switching device comprising an additional stacked blade having an opening fitting the respective comb end in said nested position of the comb thereby forming said locking means.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Connections Arranged To Contact A Plurality Of Conductors (AREA)
  • Contacts (AREA)
  • Electromagnets (AREA)
US395541A 1952-12-22 1953-12-01 Contact spring group in electromagnetic connecting apparatus Expired - Lifetime US2782270A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE741037X 1952-12-22

Publications (1)

Publication Number Publication Date
US2782270A true US2782270A (en) 1957-02-19

Family

ID=20321894

Family Applications (1)

Application Number Title Priority Date Filing Date
US395541A Expired - Lifetime US2782270A (en) 1952-12-22 1953-12-01 Contact spring group in electromagnetic connecting apparatus

Country Status (5)

Country Link
US (1) US2782270A (enrdf_load_stackoverflow)
BE (1) BE525139A (enrdf_load_stackoverflow)
DE (1) DE973535C (enrdf_load_stackoverflow)
FR (1) FR1089722A (enrdf_load_stackoverflow)
GB (1) GB741037A (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2892053A (en) * 1957-05-09 1959-06-23 Essex Wire Corp Electromagnetic relay
US2939932A (en) * 1956-09-01 1960-06-07 Int Standard Electric Corp Relays with guided contact spring
US2939937A (en) * 1957-02-15 1960-06-07 Ericsson Telefon Ab L M Lifting card

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR913417A (fr) * 1944-09-04 1946-09-10 Ericsson Telefon Ab L M Groupes de ressorts de contact pour relais et analogues
DE804220C (de) * 1948-10-02 1951-04-19 Telefonbau & Normalzeit Gmbh Anordnung fuer Kontaktfedersaetze
DE813060C (de) * 1948-10-02 1951-09-06 Normalzeit G M B H Kontaktfedersatz fuer Fernmeldeanlagen
US2606958A (en) * 1946-05-09 1952-08-12 Kellogg Switchboard & Supply Multicontact relays
US2632065A (en) * 1948-11-02 1953-03-17 Automatic Telephone & Elect Electrical switching apparatus
US2665352A (en) * 1948-04-10 1954-01-05 Itt Contact-spring switch assembly

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2279811A (en) * 1940-06-19 1942-04-14 Bell Telephone Labor Inc Relay
US2301472A (en) * 1940-06-19 1942-11-10 Bell Telephone Labor Inc Switching mechanism

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR913417A (fr) * 1944-09-04 1946-09-10 Ericsson Telefon Ab L M Groupes de ressorts de contact pour relais et analogues
US2606958A (en) * 1946-05-09 1952-08-12 Kellogg Switchboard & Supply Multicontact relays
US2665352A (en) * 1948-04-10 1954-01-05 Itt Contact-spring switch assembly
DE804220C (de) * 1948-10-02 1951-04-19 Telefonbau & Normalzeit Gmbh Anordnung fuer Kontaktfedersaetze
DE813060C (de) * 1948-10-02 1951-09-06 Normalzeit G M B H Kontaktfedersatz fuer Fernmeldeanlagen
US2632065A (en) * 1948-11-02 1953-03-17 Automatic Telephone & Elect Electrical switching apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2939932A (en) * 1956-09-01 1960-06-07 Int Standard Electric Corp Relays with guided contact spring
US2956140A (en) * 1956-09-01 1960-10-11 Int Standard Electric Corp Electromagnetic relay spring assembly
US2939937A (en) * 1957-02-15 1960-06-07 Ericsson Telefon Ab L M Lifting card
US2892053A (en) * 1957-05-09 1959-06-23 Essex Wire Corp Electromagnetic relay

Also Published As

Publication number Publication date
FR1089722A (fr) 1955-03-21
DE973535C (de) 1960-03-24
GB741037A (en) 1955-11-23
BE525139A (enrdf_load_stackoverflow)

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