GB225932A - Improvements in electric switching apparatus suitable for use in telephony - Google Patents
Improvements in electric switching apparatus suitable for use in telephonyInfo
- Publication number
- GB225932A GB225932A GB2281123A GB2281123A GB225932A GB 225932 A GB225932 A GB 225932A GB 2281123 A GB2281123 A GB 2281123A GB 2281123 A GB2281123 A GB 2281123A GB 225932 A GB225932 A GB 225932A
- Authority
- GB
- United Kingdom
- Prior art keywords
- contacts
- telephony
- common
- switching apparatus
- apparatus suitable
- 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
- H01H67/22—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
- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
Abstract
225,932. Relay Automatic Telephone Co., Ltd., and Ward, F. M. Sept. 11, 1923. Selectors.-Energization of a magnet m selects a set of contacts C by bringing a resilient member W common to two magnets beneath a blade D so that the contacts are operated upon energization of a common relay M by a bar B on its armature. A. The armature A also controls independent contacts, and the members W carry indicators K. When several relays M are combined, corresponding magnets m are connected in a. common circuit. Specifications 141,005 and 141,006 are referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2281123A GB225932A (en) | 1923-09-11 | 1923-09-11 | Improvements in electric switching apparatus suitable for use in telephony |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2281123A GB225932A (en) | 1923-09-11 | 1923-09-11 | Improvements in electric switching apparatus suitable for use in telephony |
Publications (1)
Publication Number | Publication Date |
---|---|
GB225932A true GB225932A (en) | 1924-12-11 |
Family
ID=10185425
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2281123A Expired GB225932A (en) | 1923-09-11 | 1923-09-11 | Improvements in electric switching apparatus suitable for use in telephony |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB225932A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2499553A (en) * | 1946-02-27 | 1950-03-07 | Ericsson Telefon Ab L M | Selector |
US2577067A (en) * | 1948-02-17 | 1951-12-04 | Kellogg Switchboard & Supply | Crossbar switch |
-
1923
- 1923-09-11 GB GB2281123A patent/GB225932A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2499553A (en) * | 1946-02-27 | 1950-03-07 | Ericsson Telefon Ab L M | Selector |
US2577067A (en) * | 1948-02-17 | 1951-12-04 | Kellogg Switchboard & Supply | Crossbar switch |
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