GB219604A - Improvements in sound detecting apparatus - Google Patents

Improvements in sound detecting apparatus

Info

Publication number
GB219604A
GB219604A GB354524A GB354524A GB219604A GB 219604 A GB219604 A GB 219604A GB 354524 A GB354524 A GB 354524A GB 354524 A GB354524 A GB 354524A GB 219604 A GB219604 A GB 219604A
Authority
GB
United Kingdom
Prior art keywords
amplifier
contacts
detecting apparatus
microphones
walker
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
GB354524A
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.)
WALKER SIGNAL AND EQUIPMENT CO
Original Assignee
WALKER SIGNAL AND EQUIPMENT CO
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 WALKER SIGNAL AND EQUIPMENT CO filed Critical WALKER SIGNAL AND EQUIPMENT CO
Priority to GB354524A priority Critical patent/GB219604A/en
Priority to FR577420D priority patent/FR577420A/en
Publication of GB219604A publication Critical patent/GB219604A/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)
  • Rehabilitation Tools (AREA)

Abstract

219,604. Walker Signal & Equipment Corporation, and Walker, W. L. Feb. 11, 1924. Contact. - An apparatus for detecting sounds, particularly subaqueous sounds, comprises microphones A which can be connected in various ways by a switch S through an amplifier B and relay C to a receiver D. The microphone leads are connected to four fixed contacts 15 - - 18 and the amplifier leads to two fixed contacts 19, 20 and these contacts cooperate with further groups of contacts carried by a rotatable cylinder 71. The internal wiring of the latter is such that in the four positions of the cylinder the microphones are connected to the amplifier in series, in parallel, or one at a time.
GB354524A 1924-02-11 1924-02-11 Improvements in sound detecting apparatus Expired GB219604A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB354524A GB219604A (en) 1924-02-11 1924-02-11 Improvements in sound detecting apparatus
FR577420D FR577420A (en) 1924-02-11 1924-02-18 Improvements to sound wave detection devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB354524A GB219604A (en) 1924-02-11 1924-02-11 Improvements in sound detecting apparatus

Publications (1)

Publication Number Publication Date
GB219604A true GB219604A (en) 1924-07-31

Family

ID=9760345

Family Applications (1)

Application Number Title Priority Date Filing Date
GB354524A Expired GB219604A (en) 1924-02-11 1924-02-11 Improvements in sound detecting apparatus

Country Status (2)

Country Link
FR (1) FR577420A (en)
GB (1) GB219604A (en)

Also Published As

Publication number Publication date
FR577420A (en) 1924-09-05

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