GB412616A - Improvements in telephone systems - Google Patents

Improvements in telephone systems

Info

Publication number
GB412616A
GB412616A GB37047/32A GB3704732A GB412616A GB 412616 A GB412616 A GB 412616A GB 37047/32 A GB37047/32 A GB 37047/32A GB 3704732 A GB3704732 A GB 3704732A GB 412616 A GB412616 A GB 412616A
Authority
GB
United Kingdom
Prior art keywords
relay
over
relays
register
operates
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
GB37047/32A
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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 Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Publication of GB412616A publication Critical patent/GB412616A/en
Expired legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A21—BAKING; EDIBLE DOUGHS
    • A21D—TREATMENT OF FLOUR OR DOUGH FOR BAKING, e.g. BY ADDITION OF MATERIALS; BAKING; BAKERY PRODUCTS
    • A21D2/00—Treatment of flour or dough by adding materials thereto before or during baking
    • A21D2/02—Treatment of flour or dough by adding materials thereto before or during baking by adding inorganic substances
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/40—Signalling arrangements; Manipulation of signalling currents whereby duration of pulse or interval between two pulses is variable

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Food Science & Technology (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
  • Interface Circuits In Exchanges (AREA)
GB37047/32A 1931-12-31 1932-12-31 Improvements in telephone systems Expired GB412616A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE412616X 1931-12-31

Publications (1)

Publication Number Publication Date
GB412616A true GB412616A (en) 1934-07-02

Family

ID=20309575

Family Applications (1)

Application Number Title Priority Date Filing Date
GB37047/32A Expired GB412616A (en) 1931-12-31 1932-12-31 Improvements in telephone systems

Country Status (3)

Country Link
BE (1) BE412616A (OSRAM)
FR (1) FR748397A (OSRAM)
GB (1) GB412616A (OSRAM)

Also Published As

Publication number Publication date
BE412616A (OSRAM)
FR748397A (OSRAM) 1933-06-30

Similar Documents

Publication Publication Date Title
GB412616A (en) Improvements in telephone systems
US2300186A (en) Telephone system
US2262595A (en) Telephone system
US2131568A (en) Telephone system
US2131572A (en) Telephone system
US2516645A (en) All-relay automatic and manual telephone system having butt-in and alarm features
US2676313A (en) Pulse counting relay system
GB581284A (en) Improvements in or relating to telephone systems
US2351766A (en) Telephone system
US2686841A (en) Block coupler
US3085133A (en) Connector with automatically controlled ringing
GB302200A (en) Improvements in or relating to automatic or semi-automatic telephone systems
US2033283A (en) Signaling system
US2071547A (en) Signaling system
US1670303A (en) Automatic telephone system
US2773938A (en) Trunk circuit
GB300497A (en) Improvements in or relating to telephone systems
US1528806A (en) Telephone-exchange system
US1730981A (en) Telephone system
US1632010A (en) Automatic telephone system
US2916554A (en) Telephone system
US1917390A (en) Telephone system
US1842602A (en) Automatic telephone system
US2918530A (en) Telephone system comprising multi-function dial back adapter for operator connections and toll ticketing in non-recorder exchanges
US2529364A (en) System for controlling automatic signaling for telephone lines