US2769880A - Contact device for cross bar switches - Google Patents

Contact device for cross bar switches Download PDF

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Publication number
US2769880A
US2769880A US515502A US51550255A US2769880A US 2769880 A US2769880 A US 2769880A US 515502 A US515502 A US 515502A US 51550255 A US51550255 A US 51550255A US 2769880 A US2769880 A US 2769880A
Authority
US
United States
Prior art keywords
bar
contact
contact springs
lifting bar
selecting
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
US515502A
Other languages
English (en)
Inventor
Holmqvist Gert Erik Olof
Bjorklund Bengt Erik
Dietsch Arne Kurt
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 US2769880A publication Critical patent/US2769880A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

  • Figs. 1a and lb show a contact device, in which the lifting bar actuates the contact springs directly, on one hand in un-actuated and on the other in actuated position.
  • Fig. 3 shows a modification of the invention, the selecting bar thereby giving the lifting bar an initiating movement by a direct touch.
  • 1 is a supporting sheet to which a spring set 5 together with other spring sets comprised in the same vertical row, but not shown on the drawing, are fixed.
  • contact springs 51-50 and a lifting bar 6 of insulating material with a spring 7 fixed to the lifting bar belong to each spring set 5.
  • a selecting bar 4 which is mounted at the upper and lower ends of the supporting sheet in bearing devices which are not shown on the figures.
  • the spring 7 is rigidly squeezed on the lifting bar 6 and is turnably mounted in a hole 41 in the selecting bar 4. Between the selecting bar and the lifting bar the spring 7 forms an elastic lever.
  • the lifting bar 6 is suspended on the upper contact spring 51 and is provided with holes 62-60 for the other contact springs.
  • Figs. 2a and 2b the contact springs 51-5'2 press upwards and are kept against the lower part of the holes in the block 2 by means of an additional spring 9 and an additional lifting bar 8 of insulating material.
  • the movable lifting bar 6 with the elastic lever '7 is suspended on the spring 9 and is used for lifting the spring 9. In rest position the lifting bar 6 is pressed against the support 11 by means of the spring 7.
  • the selecting bar 4 is pulled downwards, the lifting bar 5 is swung round its suspension point, and its lower part is pushed against the support 31 on the opergting bar 3, if said operating bar is in rest position, or against the edge 32, if the operating bar is actuated.
  • Fig. 1 and Fig. 2 show how said support may be replaced by a support 42 which is fixed to the selecting bar 4. This causes that, when the selecting bar is pulled downwards, the support 42 will cooperate with the spring 7 and initiate the oscillatory movement of the lifting bar 6. Owing to this the lifting bar is prevented from being wedged between the contact springs, or from not starting to move because of the friction against the supporting sheet 1.
  • the operating bar 3 has another embodiment and the block 2 as well as the spring set 5 has been arranged for 12 contact springs.
  • a contact device characterized by a support being attached to the movable selecting bar, against which support the lifting bar is pressed by said elastic lever, when the selecting bar and the lifting bar are in rest position, and which support co-operates with the elastic lever, when the selecting bar is actuated, in order to swing the lifting bar in the plane of the contact springs.

Landscapes

  • Push-Button Switches (AREA)
US515502A 1954-07-09 1955-06-14 Contact device for cross bar switches Expired - Lifetime US2769880A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE2769880X 1954-07-09

Publications (1)

Publication Number Publication Date
US2769880A true US2769880A (en) 1956-11-06

Family

ID=20427206

Family Applications (1)

Application Number Title Priority Date Filing Date
US515502A Expired - Lifetime US2769880A (en) 1954-07-09 1955-06-14 Contact device for cross bar switches

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US (1) US2769880A (enrdf_load_html_response)
BE (1) BE539663A (enrdf_load_html_response)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2903520A (en) * 1957-05-28 1959-09-08 Gen Telephone Lab Inc Multiple relay assembly
US2928915A (en) * 1955-06-11 1960-03-15 Vigren Sten Daniel Arrangement in polarized relays
US3001023A (en) * 1957-04-23 1961-09-19 Ericsson Telefon Ab L M Selecting means in cross bar switches
US3024610A (en) * 1956-04-26 1962-03-13 Monarch Machine Tool Co Electrical control system
US3098888A (en) * 1961-03-21 1963-07-23 Electro Voice Electrical musical instrument
US3217284A (en) * 1963-08-12 1965-11-09 Amp Inc Miniature contact assembly for plugboards
US3555228A (en) * 1968-04-13 1971-01-12 Nippon Musical Instruments Mfg Contact spring synchronizing switch assembly
US3614360A (en) * 1968-12-03 1971-10-19 Ericsson Telefon Ab L M A multiple contact switching device for crossbar switches

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2928915A (en) * 1955-06-11 1960-03-15 Vigren Sten Daniel Arrangement in polarized relays
US3024610A (en) * 1956-04-26 1962-03-13 Monarch Machine Tool Co Electrical control system
US3001023A (en) * 1957-04-23 1961-09-19 Ericsson Telefon Ab L M Selecting means in cross bar switches
US2903520A (en) * 1957-05-28 1959-09-08 Gen Telephone Lab Inc Multiple relay assembly
US3098888A (en) * 1961-03-21 1963-07-23 Electro Voice Electrical musical instrument
US3217284A (en) * 1963-08-12 1965-11-09 Amp Inc Miniature contact assembly for plugboards
US3555228A (en) * 1968-04-13 1971-01-12 Nippon Musical Instruments Mfg Contact spring synchronizing switch assembly
US3614360A (en) * 1968-12-03 1971-10-19 Ericsson Telefon Ab L M A multiple contact switching device for crossbar switches

Also Published As

Publication number Publication date
BE539663A (enrdf_load_html_response)

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