GB515180A - Improvements in key switching devices suitable for use in telephone systems - Google Patents

Improvements in key switching devices suitable for use in telephone systems

Info

Publication number
GB515180A
GB515180A GB15790/38A GB1579038A GB515180A GB 515180 A GB515180 A GB 515180A GB 15790/38 A GB15790/38 A GB 15790/38A GB 1579038 A GB1579038 A GB 1579038A GB 515180 A GB515180 A GB 515180A
Authority
GB
United Kingdom
Prior art keywords
cam
stop
roller
movement
key
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
GB15790/38A
Other languages
English (en)
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.)
Associated Telephone and Telegraph Co
Original Assignee
Associated Telephone and Telegraph Co
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
Priority to BE434076D priority Critical patent/BE434076A/xx
Application filed by Associated Telephone and Telegraph Co filed Critical Associated Telephone and Telegraph Co
Priority to GB15790/38A priority patent/GB515180A/en
Priority to US274385A priority patent/US2290453A/en
Publication of GB515180A publication Critical patent/GB515180A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H21/00—Switches operated by an operating part in the form of a pivotable member acted upon directly by a solid body, e.g. by a hand
    • H01H21/02—Details

Landscapes

  • Push-Button Switches (AREA)
  • Telephone Set Structure (AREA)
GB15790/38A 1938-05-26 1938-05-26 Improvements in key switching devices suitable for use in telephone systems Expired GB515180A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
BE434076D BE434076A (enrdf_load_stackoverflow) 1938-05-26
GB15790/38A GB515180A (en) 1938-05-26 1938-05-26 Improvements in key switching devices suitable for use in telephone systems
US274385A US2290453A (en) 1938-05-26 1939-05-18 Electrical key switching device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB15790/38A GB515180A (en) 1938-05-26 1938-05-26 Improvements in key switching devices suitable for use in telephone systems

Publications (1)

Publication Number Publication Date
GB515180A true GB515180A (en) 1939-11-28

Family

ID=10065497

Family Applications (1)

Application Number Title Priority Date Filing Date
GB15790/38A Expired GB515180A (en) 1938-05-26 1938-05-26 Improvements in key switching devices suitable for use in telephone systems

Country Status (3)

Country Link
US (1) US2290453A (enrdf_load_stackoverflow)
BE (1) BE434076A (enrdf_load_stackoverflow)
GB (1) GB515180A (enrdf_load_stackoverflow)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2500413A (en) * 1945-11-26 1950-03-14 Clare & Co C P Gang relay switch arrangement
US2698370A (en) * 1952-05-13 1954-12-28 Gen Control Company Electric switch
US3156789A (en) * 1961-04-06 1964-11-10 Automatic Elect Lab Lever key switch with molded lever key
US3164687A (en) * 1961-04-18 1965-01-05 Automatic Elect Lab Molded plastic lever key for locking or non-locking operation

Also Published As

Publication number Publication date
BE434076A (enrdf_load_stackoverflow)
US2290453A (en) 1942-07-21

Similar Documents

Publication Publication Date Title
GB653509A (en) Electric multi-pole switches
GB565450A (en) Improvements in and relating to electric snap-action switches
GB515180A (en) Improvements in key switching devices suitable for use in telephone systems
GB1114630A (en) Quick action electric switch
US1351161A (en) Switch
GB708451A (en) Telephone key and like switches
GB801206A (en) Improvements in or relating to electric tumbler switches
GB499496A (en) Improvements relating to electric switches for use in alternating current circuits
GB658602A (en) Improvements in operating mechanism for quick make and break electric switches
US1974310A (en) Electric switch
GB519605A (en) Improvements in snap-action electric switches
GB675844A (en) Improvements in or relating to electromagnetic relays
GB487658A (en) Improvements in and relating to electric switches operated by cams
GB827168A (en) Improvements in or relating to dolly-operated electric switches
GB413976A (en) Improvements in or relating to electric switches, more particularly tumbler switches
GB1078905A (en) A snap-action operating system in an electric switch
GB539889A (en) Improvements in mechanically operated contactor switches
GB1225963A (enrdf_load_stackoverflow)
GB783401A (en) Improvements in and relating to an electric snap-action switch
GB476584A (en) Improvements in and relating to electric key switches
GB688267A (en) Improvements in or relating to electric switches having a dolly or like pivoted operating member
GB600224A (en) Improvements in or relating to alternating current electric switches
GB714608A (en) Snap-action electric switches
GB549314A (en) Improvements in or relating to snap action electric switches
GB442969A (en) Improvements in and relating to cam-driven electric switches