GB459287A - Improvements in or relating to wiper switches such as are used in automatic telephone systems - Google Patents

Improvements in or relating to wiper switches such as are used in automatic telephone systems

Info

Publication number
GB459287A
GB459287A GB3263236A GB3263236A GB459287A GB 459287 A GB459287 A GB 459287A GB 3263236 A GB3263236 A GB 3263236A GB 3263236 A GB3263236 A GB 3263236A GB 459287 A GB459287 A GB 459287A
Authority
GB
United Kingdom
Prior art keywords
vertical
magnet
relay
relating
telephone systems
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
GB3263236A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB3263236A priority Critical patent/GB459287A/en
Publication of GB459287A publication Critical patent/GB459287A/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
    • H01H67/02—Multi-position wiper switches
    • H01H67/14—Multi-position wiper switches having wipers movable in two mutually perpendicular directions for purpose of selection
    • H01H67/16—Multi-position wiper switches having wipers movable in two mutually perpendicular directions for purpose of selection one motion being rotary and the other being parallel to the axis of rotation, e.g. Strowger or "up and around" switches

Landscapes

  • Structure Of Telephone Exchanges (AREA)

Abstract

459,287. Automatic exchange switches. STANDARD TELEPHONES & CABLES, Ltd., and GOULD, J. R., 63, Aldwych, London. June 1, 1935, No. 32632/36. Divided out of 459,233. [Class 40 (iv)] To enable the vertical magnet VM of a twodirectional switch to act as a relay during the rotary movement, the switch is modified so that, on the first rotary step, the magnet is relieved of the vertical-ratchet load and a cam RC moves a pivoted member RL to close rotary off-normal contacts NR and to couple by means of an arm BR the vertical-magnet armature VA to a set of relay contacts vm. A groupselector circuit requiring no other relay is described, and is identical with one described in Specification 459,233.
GB3263236A 1935-06-01 1935-06-01 Improvements in or relating to wiper switches such as are used in automatic telephone systems Expired GB459287A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3263236A GB459287A (en) 1935-06-01 1935-06-01 Improvements in or relating to wiper switches such as are used in automatic telephone systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3263236A GB459287A (en) 1935-06-01 1935-06-01 Improvements in or relating to wiper switches such as are used in automatic telephone systems

Publications (1)

Publication Number Publication Date
GB459287A true GB459287A (en) 1937-01-01

Family

ID=10341656

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3263236A Expired GB459287A (en) 1935-06-01 1935-06-01 Improvements in or relating to wiper switches such as are used in automatic telephone systems

Country Status (1)

Country Link
GB (1) GB459287A (en)

Similar Documents

Publication Publication Date Title
GB459287A (en) Improvements in or relating to wiper switches such as are used in automatic telephone systems
GB593050A (en) Improvements relating to automatic telephone systems
GB1369669A (en) Line circuits for communication systems
GB230763A (en) Improvements in or relating to telephone exchange systems
GB468040A (en) Improvements in or relating to electric summating apparatus
GB781133A (en) Improvements in and relating to electric couplings
GB207219A (en) Automatic telephone system and switching apparatus therefor
GB687763A (en) Improvements in circuit-arrangements for use in automatic signalling systems for engaging a common device
GB560396A (en) Improvements in step-by-step switches particularly for automatic telephone systems
GB228824A (en) Electric switches for telephone systems
GB804295A (en) Improvements in or relating to contact spring pile-ups
GB736262A (en) Improvements in automatic telephone exchange equipment
GB609194A (en) Improvements in or relating to impulse storage and repeating devices, such as are used in automatic telephone systems
GB922125A (en) Improvements in or relating to electrical control circuits
GB720624A (en) Improvements in or relating to electrical contact spring mountings
GB207483A (en) Automatic telephone system and switching apparatus therefor
GB516629A (en) Improvements in or relating to circuit arrangements for the remote control of motors in telegraph systems
GB494582A (en) Improvements in or relating to telegraph switching systems
GB284766A (en) Improvements relating to automatic and semi-automatic telephone systems
GB242713A (en) Improvements in automatic telephone systems
GB267610A (en) Improvements in automatic or semi-automatic telephone systems
GB317531A (en) Improvements in or relating to telephone systems
GB1024196A (en) Circuit arrangement for pabxs with key-dialling and tie-lines to other pabxs
GB296424A (en) Circuit arrangement for double duty selectors in telephone installations
GB284399A (en) Improvements in coil holders as used in wireless receivers