GB708451A - Telephone key and like switches - Google Patents

Telephone key and like switches

Info

Publication number
GB708451A
GB708451A GB23484/51A GB2348451A GB708451A GB 708451 A GB708451 A GB 708451A GB 23484/51 A GB23484/51 A GB 23484/51A GB 2348451 A GB2348451 A GB 2348451A GB 708451 A GB708451 A GB 708451A
Authority
GB
United Kingdom
Prior art keywords
key
springs
moved
contact springs
operative position
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
GB23484/51A
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.)
Automatic Electric Laboratories Inc
Original Assignee
Automatic Electric Laboratories 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 Automatic Electric Laboratories Inc filed Critical Automatic Electric Laboratories Inc
Publication of GB708451A publication Critical patent/GB708451A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/24—Contacts characterised by the manner in which co-operating contacts engage by abutting with resilient mounting
    • H01H1/26—Contacts characterised by the manner in which co-operating contacts engage by abutting with resilient mounting with spring blade support
    • H01H1/28—Assembly of three or more contact-supporting spring blades
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
    • F23B2700/00—Combustion apparatus for solid fuel
    • F23B2700/011—Combustion apparatus for solid fuel with fuel shaft for steam boilers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/20—Control lever and linkage systems
    • Y10T74/20576—Elements
    • Y10T74/20636—Detents
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/20—Control lever and linkage systems
    • Y10T74/20576—Elements
    • Y10T74/20924—Controller checks

Landscapes

  • Mechanical Control Devices (AREA)
  • Telephone Set Structure (AREA)
  • Push-Button Switches (AREA)

Abstract

708,451. Switches held set and freed mechanically. AUTOMATIC ELECTRIC LABORATORIES Inc. Oct. 9, 1951 [Jan. 16, 1951], No. 23484/51 Class 38(5) A telephone key switch with a key 4 which may be moved in either direction from a central position to operate contact springs has a pair of.cantilever detent springs 10 adapted to engage notches 7 in the key to prevent the key passing the central position when it is 'flicked' back to that position from an operative position. On the other hand the key may be moved directly from one operative position to the other if it is moved slowly. The detent springs 10 normally lie outside the path of the notches 7 but they are weighted at 11 so that they move beyond their normal position on a sudden movement of the key. The key carries two rollers 5 which operate contact springs 8, 18 and, through them, other contact springs. In an operative position the roller has passed beyond a dead-centre position relative to the spring 8 or 18 and is thereby held.
GB23484/51A 1951-01-16 1951-10-09 Telephone key and like switches Expired GB708451A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US206282A US2672765A (en) 1951-01-16 1951-01-16 Lever key

Publications (1)

Publication Number Publication Date
GB708451A true GB708451A (en) 1954-05-05

Family

ID=22765708

Family Applications (1)

Application Number Title Priority Date Filing Date
GB23484/51A Expired GB708451A (en) 1951-01-16 1951-10-09 Telephone key and like switches

Country Status (4)

Country Link
US (1) US2672765A (en)
BE (1) BE506996A (en)
FR (1) FR1044080A (en)
GB (1) GB708451A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2875639A (en) * 1954-01-15 1959-03-03 Bell Telephone Labor Inc Switching device mechanism
DE1153033B (en) * 1955-10-24 1963-08-22 Adlerwerke Kleyer Ag H Device on accounting machines for the automatic adjustment of writing sheets to be introduced on the front side of the platen to the line to be written by means of conveyor rollers
US2943158A (en) * 1958-05-22 1960-06-28 Northern Electric Co Two way lever type telephone key
US3076063A (en) * 1960-03-24 1963-01-29 Gen Dynamics Corp Switching keys with cam follower means
US3317682A (en) * 1965-10-14 1967-05-02 Automatic Elect Lab Switching device with sensor for proximity switch
US3543602A (en) * 1968-11-25 1970-12-01 Robert D Riedle Lever positioning apparatus

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1508798A (en) * 1920-08-23 1924-09-16 Kellogg Switchboard & Supply Key
US2427187A (en) * 1945-05-10 1947-09-09 Kellogg Switchboard & Supply Listening and ringing key for telephone switchboards

Also Published As

Publication number Publication date
FR1044080A (en) 1953-11-13
US2672765A (en) 1954-03-23
BE506996A (en)

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