GB541680A - Improvements in or relating to echo sounding apparatus - Google Patents

Improvements in or relating to echo sounding apparatus

Info

Publication number
GB541680A
GB541680A GB21769/39A GB2176939A GB541680A GB 541680 A GB541680 A GB 541680A GB 21769/39 A GB21769/39 A GB 21769/39A GB 2176939 A GB2176939 A GB 2176939A GB 541680 A GB541680 A GB 541680A
Authority
GB
United Kingdom
Prior art keywords
pointer
magnet
contact
electromagnet
zero
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
GB21769/39A
Other languages
English (en)
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.)
ARNOLD NICKELSEN
Original Assignee
ARNOLD NICKELSEN
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 ARNOLD NICKELSEN filed Critical ARNOLD NICKELSEN
Publication of GB541680A publication Critical patent/GB541680A/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
    • G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
    • G01S1/72—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using ultrasonic, sonic or infrasonic waves

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Control Of Direct Current Motors (AREA)
GB21769/39A 1938-10-08 1939-07-26 Improvements in or relating to echo sounding apparatus Expired GB541680A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE541680X 1938-10-08

Publications (1)

Publication Number Publication Date
GB541680A true GB541680A (en) 1941-12-08

Family

ID=6559367

Family Applications (1)

Application Number Title Priority Date Filing Date
GB21769/39A Expired GB541680A (en) 1938-10-08 1939-07-26 Improvements in or relating to echo sounding apparatus

Country Status (2)

Country Link
BE (1) BE435558A (enrdf_load_stackoverflow)
GB (1) GB541680A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2567193A (en) * 1945-08-07 1951-09-11 Standard Telephones Cables Ltd Indicator for direction finders

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2567193A (en) * 1945-08-07 1951-09-11 Standard Telephones Cables Ltd Indicator for direction finders

Also Published As

Publication number Publication date
BE435558A (enrdf_load_stackoverflow)

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