GB788617A - Improvements in or relating to crossbar switches - Google Patents

Improvements in or relating to crossbar switches

Info

Publication number
GB788617A
GB788617A GB20872/55A GB2087255A GB788617A GB 788617 A GB788617 A GB 788617A GB 20872/55 A GB20872/55 A GB 20872/55A GB 2087255 A GB2087255 A GB 2087255A GB 788617 A GB788617 A GB 788617A
Authority
GB
United Kingdom
Prior art keywords
finger
bar
july
cross
hold
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
Application number
GB20872/55A
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.)
AT&T Corp
Original Assignee
Western Electric Co Inc
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 Western Electric Co Inc filed Critical Western Electric Co Inc
Publication of GB788617A publication Critical patent/GB788617A/en
Expired legal-status Critical Current

Links

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

Landscapes

  • Input From Keyboards Or The Like (AREA)
  • Tumbler Switches (AREA)
  • Push-Button Switches (AREA)

Abstract

788,617. Cross-bar switches. WESTERN ELECTRIC CO., Inc. July 19, 1955 [July 22, 1954], No. 20872/55. Class 40 (4). In a cross-bar switch having select bars such as 1 and hold bars such as 2, a projection 3 is provided on the hold bar 2 or on an adjacent part of the switch frame to lie in the path of a flexible selecting finger 4. The projection causes the selecting finger to rebound on to the bevelled portions 22, 25 of a contact operating card 16 when the finger is released from an upper or lower operated position and thereby reduces the risk of an overthrow from one operating position to the other. A flexibly mounted helical coil may surround the finger to damp its oscillation. U.S.A. Specifications 2.039,630, 2,066,465 and 2,117,702 are referred to.
GB20872/55A 1954-07-22 1955-07-19 Improvements in or relating to crossbar switches Expired GB788617A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US445056A US2827518A (en) 1954-07-22 1954-07-22 Damping means for crossbar switch selecting finger

Publications (1)

Publication Number Publication Date
GB788617A true GB788617A (en) 1958-01-02

Family

ID=23767441

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20872/55A Expired GB788617A (en) 1954-07-22 1955-07-19 Improvements in or relating to crossbar switches

Country Status (6)

Country Link
US (1) US2827518A (en)
BE (1) BE539957A (en)
DE (1) DE1041541B (en)
FR (1) FR1125437A (en)
GB (1) GB788617A (en)
NL (2) NL195746A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3474207A (en) * 1968-01-22 1969-10-21 Northern Electric Co Damping spring for select bars in crossbar switches

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2039630A (en) * 1935-07-20 1936-05-05 Bell Telephone Labor Inc Selective switch
US2118935A (en) * 1936-08-06 1938-05-31 Bell Telephone Labor Inc Switch mechanism
US2117702A (en) * 1936-10-06 1938-05-17 Bell Telephone Labor Inc Switching mechanism
US2490665A (en) * 1944-03-01 1949-12-06 Kellogg Switchboard & Supply Automatic telephone switch
US2535769A (en) * 1948-02-19 1950-12-26 Automatic Elect Lab Switch of the crossbar type

Also Published As

Publication number Publication date
BE539957A (en)
US2827518A (en) 1958-03-18
NL195746A (en)
DE1041541B (en) 1958-10-23
FR1125437A (en) 1956-10-30
NL96549C (en)

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