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 systemsInfo
- 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
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.
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) |
-
1935
- 1935-06-01 GB GB3263236A patent/GB459287A/en not_active Expired
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 |