CH457564A - Tastengesteuerter Zweifrequenz-Tongenerator - Google Patents

Tastengesteuerter Zweifrequenz-Tongenerator

Info

Publication number
CH457564A
CH457564A CH112767A CH112767A CH457564A CH 457564 A CH457564 A CH 457564A CH 112767 A CH112767 A CH 112767A CH 112767 A CH112767 A CH 112767A CH 457564 A CH457564 A CH 457564A
Authority
CH
Switzerland
Prior art keywords
key
operated
tone generator
frequency tone
frequency
Prior art date
Application number
CH112767A
Other languages
English (en)
Inventor
Gasser Lorenz
Original Assignee
Int Standard Electric Corp
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 Int Standard Electric Corp filed Critical Int Standard Electric Corp
Publication of CH457564A publication Critical patent/CH457564A/de

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)
  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
  • Selective Calling Equipment (AREA)
  • Lock And Its Accessories (AREA)
  • Transmitters (AREA)
CH112767A 1966-01-28 1967-01-25 Tastengesteuerter Zweifrequenz-Tongenerator CH457564A (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEST024918 1966-01-28

Publications (1)

Publication Number Publication Date
CH457564A true CH457564A (de) 1968-06-15

Family

ID=7460326

Family Applications (1)

Application Number Title Priority Date Filing Date
CH112767A CH457564A (de) 1966-01-28 1967-01-25 Tastengesteuerter Zweifrequenz-Tongenerator

Country Status (7)

Country Link
US (1) US3526724A (de)
CH (1) CH457564A (de)
DE (1) DE1487960C3 (de)
FR (1) FR1509533A (de)
GB (1) GB1155765A (de)
NL (1) NL6701462A (de)
SE (1) SE324594B (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3831015A (en) * 1972-06-08 1974-08-20 Intel Corp System for generating a multiplicity of frequencies from a single reference frequency

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL242923A (de) * 1958-09-08
DE1185665B (de) * 1963-09-14 1965-01-21 Standard Elektrik Lorenz Ag Tastengesteuerter Mehrfrequenz-Tongenerator
US3284577A (en) * 1963-10-10 1966-11-08 Substation apparatus employing a multi- frequency signaling arrangement

Also Published As

Publication number Publication date
SE324594B (de) 1970-06-08
GB1155765A (en) 1969-06-18
NL6701462A (de) 1967-07-31
DE1487960C3 (de) 1973-11-22
US3526724A (en) 1970-09-01
DE1487960A1 (de) 1969-02-27
DE1487960B2 (de) 1973-05-03
FR1509533A (fr) 1968-01-12

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