NL237530A - - Google Patents

Info

Publication number
NL237530A
NL237530A NL237530DA NL237530A NL 237530 A NL237530 A NL 237530A NL 237530D A NL237530D A NL 237530DA NL 237530 A NL237530 A NL 237530A
Authority
NL
Netherlands
Application number
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 of NL237530A publication Critical patent/NL237530A/xx
Application filed filed Critical

Links

Classifications

    • 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
    • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
    • H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Relay Circuits (AREA)
NL237530D 1959-03-25 1959-03-25 NL237530A (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CA728283T
NL237530A NL98374C (zh) 1959-03-25 1959-03-25

Publications (1)

Publication Number Publication Date
NL237530A true NL237530A (zh)

Family

ID=76269553

Family Applications (2)

Application Number Title Priority Date Filing Date
NL237530D NL237530A (zh) 1959-03-25 1959-03-25
NL237530A NL98374C (zh) 1959-03-25 1959-03-25

Family Applications After (1)

Application Number Title Priority Date Filing Date
NL237530A NL98374C (zh) 1959-03-25 1959-03-25

Country Status (5)

Country Link
US (1) US3088057A (zh)
JP (1) JPS3718204B1 (zh)
BE (1) BE588951A (zh)
CA (1) CA728283A (zh)
NL (2) NL237530A (zh)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3252141A (en) * 1961-07-31 1966-05-17 Omnitronic Corp Fail-safe control system

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2379631A (en) * 1940-07-05 1945-07-03 Landis & Gyr Ag Remote control installation

Also Published As

Publication number Publication date
US3088057A (en) 1963-04-30
CA728283A (en) 1966-02-15
BE588951A (nl) 1960-09-23
NL98374C (zh) 1961-06-15
JPS3718204B1 (zh) 1962-11-22

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