ES359360A1 - Dispositivo de senalizacion de tono. - Google Patents

Dispositivo de senalizacion de tono.

Info

Publication number
ES359360A1
ES359360A1 ES359360A ES359360A ES359360A1 ES 359360 A1 ES359360 A1 ES 359360A1 ES 359360 A ES359360 A ES 359360A ES 359360 A ES359360 A ES 359360A ES 359360 A1 ES359360 A1 ES 359360A1
Authority
ES
Spain
Prior art keywords
oscillators
piezo
signalling device
tone signalling
electric reed
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
ES359360A
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.)
Nokia Spain SA
Original Assignee
Alcatel Espana SA
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 Alcatel Espana SA filed Critical Alcatel Espana SA
Publication of ES359360A1 publication Critical patent/ES359360A1/es
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)
ES359360A 1967-10-19 1968-10-19 Dispositivo de senalizacion de tono. Expired ES359360A1 (es)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
ES359360A1 true ES359360A1 (es) 1970-06-01

Family

ID=10445750

Family Applications (1)

Application Number Title Priority Date Filing Date
ES359360A Expired ES359360A1 (es) 1967-10-19 1968-10-19 Dispositivo de senalizacion de tono.

Country Status (5)

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

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 (es) 1969-04-22
FR1589566A (es) 1970-03-31
DE1762919A1 (de) 1970-12-23

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