US2719280A - Echo sounders - Google Patents

Echo sounders Download PDF

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Publication number
US2719280A
US2719280A US215200A US21520051A US2719280A US 2719280 A US2719280 A US 2719280A US 215200 A US215200 A US 215200A US 21520051 A US21520051 A US 21520051A US 2719280 A US2719280 A US 2719280A
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US
United States
Prior art keywords
voltage
condensers
condenser
discharge
relay
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 - Lifetime
Application number
US215200A
Other languages
English (en)
Inventor
Rolfe Denis Hugh
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.)
Marconi Sounding Device Co Ltd
Original Assignee
Marconi Sounding Device Co Ltd
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 Marconi Sounding Device Co Ltd filed Critical Marconi Sounding Device Co Ltd
Application granted granted Critical
Publication of US2719280A publication Critical patent/US2719280A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H03K3/53—Generators characterised by the type of circuit or by the means used for producing pulses by the use of an energy-accumulating element discharged through the load by a switching device controlled by an external signal and not incorporating positive feedback
    • H03K3/55—Generators characterised by the type of circuit or by the means used for producing pulses by the use of an energy-accumulating element discharged through the load by a switching device controlled by an external signal and not incorporating positive feedback the switching device being a gas-filled tube having a control electrode
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
    • G01S15/88—Sonar systems specially adapted for specific applications
    • G01S15/96—Sonar systems specially adapted for specific applications for locating fish
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
    • G01S7/523—Details of pulse systems
    • G01S7/524—Transmitters

Definitions

  • This invention relates to echo sounders and has for its object-t0 provide improved means -for producing from a comparatively low voltage source a high voltage pulse for operating an echo sounding transmitter.
  • the transmitting projector is also used for reception it is of advantage to restrict the condenser discharge to the first half cycle in order to maintain the residual magnetism of the magneto-strictive projector and leave it suitably polarized for reception.
  • One known way of doing this is to control the discharge of the condenser by a cold cathode gas filled tube arranged to be non-conducting until a suitable trigger pulse is applied to it and applying such a pulse when it is desired to transmit. With such an arrangement the main discharge continues until the current falls to zero, whereupon the tube ceases to conduct. The result is therefore, that only the first half cycle of discharge takes place as is desired.
  • tubes capable of passing peak currents of the order of from 50 to 150 amperes are necessary. So long as the operating voltage is fairly low e. g. up to about 400 volts, neon filled tubes can be satisfactorily used for currents of this order. For higher voltages,
  • the present invention seeks to overcome these difiiculties and defects and to provide improved and relatively simple arrangements employing relatively inexpensive discharge devices and capable of producing a high voltage, high peak current discharge from a relatively low voltage source, preferably the source already normally provided as the anode voltage source for the echo sounder receiver circuit.
  • 'In the preferred and simplest embodiments of the invention there are .only'two condensers and two discharge devices, which are so connected that, when the discharge devices are non-conducting, the condensers are charged in parallel through resistance inseries, but upon the application of a triggering voltage to one of the discharge devices to break it down, the voltage in the first condenser is added in series to that in the second to produce a sum voltage which is suflicient to breakdown the second discharge device and discharge both condensers in 'a :series circuit through the transmitter.
  • the relay tube 4 has its anode 6 towards the positive terminal 2 and is of a known type having, in addition to the anode, a cathode 7 and two grids 8 and 9. The grid 8 nearer the cathode is connected thereto through a resistance 10.
  • a potentiometer consisting of two further resistances 11, 12 in series is connected across the source, a condenser 13 being shunted across that of resistance 12 which is on the negative side.
  • the remaining grid 9 of the relay tube 4 is connected to the junction point of the two resistances 11, 12 through a resistance 14.
  • the anode 6 of the said relay tube 4 is connected through two parallel branch circuits to ground, the first branch circuit consisting of a first main condenser 15 in series with a resistance 16 and the other consisting of a resistance 17 in series with a second main condenser 18, these elements being in the order stated, in each case.
  • the anode 19 of a second similar gas filled relay tube 20 is connected to the junction point of the elements 17, 18 and the cathode 21 thereof is connected to the junction point of the elements 15, 16.
  • the grid 22 of the second relay tube which is nearer the anode thereof is connected through a resistance 23 to the junction point of the resistances 11, 12 and the remaining grid 24 is connected to ground through a resistance 25.
  • the said grid 24 is also connected to ground through a condenser 26 and a transmitting key 27 (or through a pair of transmitting contacts), the junction point of said condenser 26 with said key or contacts being connected to the junction point of the resistances 11, 12 through yet another resistance 28.
  • the said relay tube 4 is, however, unable to withstand this voltage-in practice, the relay tube may conveniently be chosen to break down when the voltage across it exceeds that of the supply source by about 30 voltsand accordingly itbreaks down and a voltage approaching twicethe supply'voltage appears across the transmitter coil .T, and the main condensers 15, .18 discharge therethrough in series. When the discharge current falls to zero the gas filled relay tubes extinguish and the main condensers recharge.
  • Fig. 1 may be regarded as a two stage embodiment but, as already stated, the invention may. be carried into practice with as many stages .assare desired or are necessary to obtain the required highdischarge voltage from the relatively low voltage supply source.
  • Fig. 2 there may be four main condensers here designated C1, C2, C3, C4 andfour .gas filledrelaytubes here designated R1, R2, R3,.R4, the condenserscharging in parallel so long as the .gas filled relay tubes are non-conductive.
  • the relay.tubes and condensers are connected as shown so that when the first relay tube R1 is triggered, the chargein .thefirst condenser C1 is added to the voltage across the second relay tubeRZ causing it to break down and add the sum of the voltages in the first two condensers C1, C2 to that across the third relay tube R3, which in turn breaks down and adds the sum of the voltages in the first three condensers C1, C2, C3 to that across the fourth relay tube R4 which in turn breaks down and discharges the sum voltage clue to all four condensers C1, C2, C3, C4 in series through the transmitter coil T.
  • An echo sounder transmitter arrangement comprising a voltage source, an echo sounding transmitter, a plurality of condensers, circuits including said condensers for charging said condensers in parallel from said source, a plurality of discharge devices each constituted by a cold cathode gas filled relay having a cathode, an anode and at least one triggering grid between said anode and cathode, means for applying a triggering potential to the triggering electrode of the first of said devices, circuits connecting each of said devices except the last between two of said condensers to add, when conductive, the charge voltage or voltages on the condenser or condensers on the voltage supply source side thereof, each of said devices except the first having a breakdown voltage below the sum of the charge voltage of the condensers on the voltage source side thereof, the final discharge device being connected in series with the echo sounding transmitter, wherein an input circuit is arranged between said voltage source and said first mentioned discharge device, said input circuit including a pair of resistances connected in series and connected across said

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • General Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Electrotherapy Devices (AREA)
  • Fire Alarms (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
US215200A 1950-03-27 1951-03-13 Echo sounders Expired - Lifetime US2719280A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB7661/50A GB694176A (en) 1950-03-27 1950-03-27 Improvements in or relating to echo sounders

Publications (1)

Publication Number Publication Date
US2719280A true US2719280A (en) 1955-09-27

Family

ID=9837387

Family Applications (1)

Application Number Title Priority Date Filing Date
US215200A Expired - Lifetime US2719280A (en) 1950-03-27 1951-03-13 Echo sounders

Country Status (5)

Country Link
US (1) US2719280A (fr)
BE (1) BE502084A (fr)
ES (1) ES197050A1 (fr)
FR (1) FR1034782A (fr)
GB (1) GB694176A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3424268A (en) * 1959-08-26 1969-01-28 Shell Oil Co Velocity well logging

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE954135C (de) * 1953-02-17 1956-12-13 Atlas Werke Ag Schaltungsanordnung zur Stosserregung durch Kondensatorentladung

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2110015A (en) * 1932-03-09 1938-03-01 Gen Electric Electric timing and counting device
US2167536A (en) * 1937-06-09 1939-07-25 Gen Electric Submarine signaling

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2110015A (en) * 1932-03-09 1938-03-01 Gen Electric Electric timing and counting device
US2167536A (en) * 1937-06-09 1939-07-25 Gen Electric Submarine signaling

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3424268A (en) * 1959-08-26 1969-01-28 Shell Oil Co Velocity well logging

Also Published As

Publication number Publication date
BE502084A (fr)
GB694176A (en) 1953-07-15
FR1034782A (fr) 1953-07-31
ES197050A1 (es) 1953-04-01

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