BE819732A - TRACKS FOR HEAVY LOADS - Google Patents

TRACKS FOR HEAVY LOADS

Info

Publication number
BE819732A
BE819732A BE148372A BE148372A BE819732A BE 819732 A BE819732 A BE 819732A BE 148372 A BE148372 A BE 148372A BE 148372 A BE148372 A BE 148372A BE 819732 A BE819732 A BE 819732A
Authority
BE
Belgium
Prior art keywords
tracks
heavy loads
loads
heavy
Prior art date
Application number
BE148372A
Other languages
French (fr)
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
Publication of BE819732A publication Critical patent/BE819732A/en

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
    • H04Q1/446—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency
    • H04Q1/448—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency with conversion of a single frequency signal into a digital signal

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Measuring Frequencies, Analyzing Spectra (AREA)
  • Connection Of Plates (AREA)
BE148372A 1973-09-11 1974-09-10 TRACKS FOR HEAVY LOADS BE819732A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4587773A GB1482629A (en) 1973-09-11 1973-09-11 Tone detectors

Publications (1)

Publication Number Publication Date
BE819732A true BE819732A (en) 1974-12-31

Family

ID=10438949

Family Applications (1)

Application Number Title Priority Date Filing Date
BE148372A BE819732A (en) 1973-09-11 1974-09-10 TRACKS FOR HEAVY LOADS

Country Status (4)

Country Link
BE (1) BE819732A (en)
ES (1) ES429964A1 (en)
GB (1) GB1482629A (en)
IT (1) IT1020760B (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4164036A (en) * 1977-12-07 1979-08-07 Honeywell Inc. Quadrature correlation phase reversal pulse detector
US4216463A (en) * 1978-08-10 1980-08-05 Motorola, Inc. Programmable digital tone detector
FR2451691A1 (en) * 1979-03-16 1980-10-10 Thomson Csf FREQUENCY COMPARATOR CIRCUIT AND SELECTIVE CALLING DEVICE COMPRISING SUCH A CIRCUIT
JPS59140739A (en) * 1983-01-31 1984-08-13 Sony Corp Control signal detecting circuit
US4698769A (en) * 1985-02-04 1987-10-06 American Telephone And Telegraph Company Supervisory audio tone detection in a radio channel
US4783845A (en) * 1985-12-20 1988-11-08 Itt Aerospace Optical Digital tone squelch detector

Also Published As

Publication number Publication date
GB1482629A (en) 1977-08-10
ES429964A1 (en) 1976-09-16
IT1020760B (en) 1977-12-30

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Legal Events

Date Code Title Description
RE Patent lapsed

Owner name: MOLYNEUX G.

Effective date: 19860930