GB971763A - Device for transmitting signals over an acoustical delay line - Google Patents

Device for transmitting signals over an acoustical delay line

Info

Publication number
GB971763A
GB971763A GB595461A GB595461A GB971763A GB 971763 A GB971763 A GB 971763A GB 595461 A GB595461 A GB 595461A GB 595461 A GB595461 A GB 595461A GB 971763 A GB971763 A GB 971763A
Authority
GB
United Kingdom
Prior art keywords
delay line
source
width
feb
trigger pulses
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
GB595461A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Publication of GB971763A publication Critical patent/GB971763A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
    • H03K3/26—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback
    • H03K3/30—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using a transformer for feedback, e.g. blocking oscillator
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
    • H03H9/30—Time-delay networks
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
    • H03H9/30—Time-delay networks
    • H03H9/36—Time-delay networks with non-adjustable delay time

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)
  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)

Abstract

971,763. Electromechanical delay lines; transistor blocking oscillator circuits. STANDARD TELEPHONES & CABLES Ltd. Feb. 17, 1961 [Feb. 18, 1960], No. 5954/61. Headings H3T and H3U. The input transducer of an electromechanical delay line comprises a blocking oscillator having a pair of inductively coupled windings 2, 3 wound around the delay line. The oscillatory circuit includes a PNP transistor T connected in common emitter configuration, the emitter being connected to a source of +6 v. through a resistance R1 the value of which determines the pulse width. The collector is connected to a source of trigger pulses over a circuit comprising two diodes G1, G2 which limit the collector voltage and rectify the trigger pulses. Further limitation is effected by diode G3 connected to a source of - 6 v. The delay line 1 consists of stranded nickel wire and is mounted at each end within a plastic tube supported on an insulative sheet which serves at the same time as a printed-circuit board for the input and output. The width of the coil is made equal to twice the width of the pulse multiplied by the speed of sound in nickel. Specifications 781,901, 781,902 and 887,977 are referred to.
GB595461A 1960-02-18 1961-02-17 Device for transmitting signals over an acoustical delay line Expired GB971763A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE39578 1960-02-18

Publications (1)

Publication Number Publication Date
GB971763A true GB971763A (en) 1964-10-07

Family

ID=3840179

Family Applications (1)

Application Number Title Priority Date Filing Date
GB595461A Expired GB971763A (en) 1960-02-18 1961-02-17 Device for transmitting signals over an acoustical delay line

Country Status (4)

Country Link
BE (1) BE587746A (en)
DE (1) DE1176186B (en)
GB (1) GB971763A (en)
NL (1) NL260389A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL111844C (en) * 1959-10-20

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB784522A (en) * 1954-10-19 1957-10-09 Gen Electric Co Ltd Improvements in and relating to automatic telephone systems

Also Published As

Publication number Publication date
DE1176186B (en) 1964-08-20
BE587746A (en)
NL260389A (en)

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