GB411356A - Improvements in or relating to apparatus for determining the distance between two or more stations - Google Patents

Improvements in or relating to apparatus for determining the distance between two or more stations

Info

Publication number
GB411356A
GB411356A GB28393/33A GB2839333A GB411356A GB 411356 A GB411356 A GB 411356A GB 28393/33 A GB28393/33 A GB 28393/33A GB 2839333 A GB2839333 A GB 2839333A GB 411356 A GB411356 A GB 411356A
Authority
GB
United Kingdom
Prior art keywords
sound
operated
distance
waves
wireless
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
GB28393/33A
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.)
MEAF Machinerieen en Apparaten Fabrieken NV
Original Assignee
MEAF Machinerieen en Apparaten Fabrieken NV
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 MEAF Machinerieen en Apparaten Fabrieken NV filed Critical MEAF Machinerieen en Apparaten Fabrieken NV
Publication of GB411356A publication Critical patent/GB411356A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G01S11/00—Systems for determining distance or velocity not using reflection or reradiation
    • G01S11/16—Systems for determining distance or velocity not using reflection or reradiation using difference in transit time between electrical and acoustic signals

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
  • Geophysics And Detection Of Objects (AREA)

Abstract

411,356. Distance-measuring apparatus. NAAMLOOZE VENNOOTSCHAP MACHINERIEEN-EN-APPARATEN FABRIEKEN, 30, Croeselaan, Utrecht, Holland. Oct. 13, 1933, No. 28393. Convention date, Nov. 25, 1932. [Class 118 (ii).] In a system for measuring distance by the time lag between sound waves and wireless waves, the electrical current serving to feed the sound source modulates the wireless waves as soon as the acoustic transmitter is connected in circuit. As shown in Fig. 1, the motor 1 drives generator 2 which feeds the sound emitter 3 and transformer 7. When the circuit is completed by cam 5 the sound emitter is operated and current flows through transformer 7, which supplies current to the wireless transmitter 8 in rhythm with the sound signals. Fig. 2 illustrates an embodiment in which an air sound emitter 12 and an under water sound emitter 21 are operated in turn, the wireless transmitter being operated in synchronism with both emissions. Specification 372,750 is referred to.
GB28393/33A 1932-11-25 1933-10-13 Improvements in or relating to apparatus for determining the distance between two or more stations Expired GB411356A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE411356X 1932-11-25

Publications (1)

Publication Number Publication Date
GB411356A true GB411356A (en) 1934-06-07

Family

ID=6430357

Family Applications (1)

Application Number Title Priority Date Filing Date
GB28393/33A Expired GB411356A (en) 1932-11-25 1933-10-13 Improvements in or relating to apparatus for determining the distance between two or more stations

Country Status (1)

Country Link
GB (1) GB411356A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1669775A1 (en) * 2004-12-08 2006-06-14 Nederlandse Organisatie voor toegepast-natuurwetenschappelijk Onderzoek TNO Method and system for determining the location and/or speed of at least one swimmer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1669775A1 (en) * 2004-12-08 2006-06-14 Nederlandse Organisatie voor toegepast-natuurwetenschappelijk Onderzoek TNO Method and system for determining the location and/or speed of at least one swimmer
WO2006062399A1 (en) * 2004-12-08 2006-06-15 Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek Tno Method and system for determining the location and/or speed of at least one swimmer

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