FR1589566A - - Google Patents

Info

Publication number
FR1589566A
FR1589566A FR1589566DA FR1589566A FR 1589566 A FR1589566 A FR 1589566A FR 1589566D A FR1589566D A FR 1589566DA FR 1589566 A FR1589566 A FR 1589566A
Authority
FR
France
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
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 filed Critical
Application granted granted Critical
Publication of FR1589566A publication Critical patent/FR1589566A/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/26—Devices for calling a subscriber
    • H04M1/30—Devices which can set up and transmit only one digit at a time
    • H04M1/50—Devices which can set up and transmit only one digit at a time by generating or selecting currents of predetermined frequencies or combinations of frequencies

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Push-Button Switches (AREA)
  • Input From Keyboards Or The Like (AREA)
  • Electronic Switches (AREA)
FR1589566D 1967-10-19 1968-10-18 Expired FR1589566A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4764467 1967-10-19

Publications (1)

Publication Number Publication Date
FR1589566A true FR1589566A (fr) 1970-03-31

Family

ID=10445750

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1589566D Expired FR1589566A (fr) 1967-10-19 1968-10-18

Country Status (5)

Country Link
US (1) US3546619A (fr)
DE (1) DE1762919A1 (fr)
ES (1) ES359360A1 (fr)
FR (1) FR1589566A (fr)
NL (1) NL6814918A (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3725908A (en) * 1971-06-21 1973-04-03 Control Data Corp Impact transducer keyboard apparatus
US3824486A (en) * 1972-10-27 1974-07-16 Vernitron Corp Solid state switching circuit employing a selectively damped piezoelectric resonator to control a thyristor circuit

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3139476A (en) * 1964-06-30 Electrical musical string instrument
US3265992A (en) * 1961-02-24 1966-08-09 Litton Systems Inc Pulsed oscillator with start stop controls
US3423514A (en) * 1961-12-01 1969-01-21 Hohner Ag Matth Oscillating generator particularly designed for polyphonic musical instruments

Also Published As

Publication number Publication date
US3546619A (en) 1970-12-08
NL6814918A (fr) 1969-04-22
ES359360A1 (es) 1970-06-01
DE1762919A1 (de) 1970-12-23

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Legal Events

Date Code Title Description
ST Notification of lapse