GB402830A - Improvements in or relating to pressure wave transmitters and receivers incorporating magneto-strictive devices - Google Patents

Improvements in or relating to pressure wave transmitters and receivers incorporating magneto-strictive devices

Info

Publication number
GB402830A
GB402830A GB1647432A GB1647432A GB402830A GB 402830 A GB402830 A GB 402830A GB 1647432 A GB1647432 A GB 1647432A GB 1647432 A GB1647432 A GB 1647432A GB 402830 A GB402830 A GB 402830A
Authority
GB
United Kingdom
Prior art keywords
per cent
jacket
magnetostrictive
volume changes
pressure wave
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
GB1647432A
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 INTERNAT MARINE COMM C
Original Assignee
MARCONI INTERNAT MARINE COMM C
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 INTERNAT MARINE COMM C filed Critical MARCONI INTERNAT MARINE COMM C
Priority to GB1647432A priority Critical patent/GB402830A/en
Publication of GB402830A publication Critical patent/GB402830A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
    • B06B1/08—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with magnetostriction

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Geophysics And Detection Of Objects (AREA)

Abstract

402,830. Subaqueous audible signalling - apparatus ; acoustic reflectors. MARCONI INTERNATIONAL MARINE COMMUNICATION CO., Ltd., Marconi House, Strand, and HINTON, N. P., 57, Broughton Avenue, Finchley, both in London. June 10, 1932, No. 16474. [Classes 13 and 118 (ii).] A magnetostrictive pressure wave transmitter and/or receiver suitable for use in echo-sounding, subaqueous signalling systems, and for detecting underwater bodies, such as icebergs, comprises a body of magnetostrictive material which exhibits substantial volume changes when subjected to varying magnetizing forces, said body being immersed in a liquid medium in which wave propagation is to be effected so that pressure waves are propagated directly as a result of such volume changes. Nickel-iron alloys containing from 20 per cent to 50 per cent nickel and 80 per cent to 50 per cent iron which exhibit substantial volume changes are preferably used in carrying out the invention. Fig. 1 shows a construction in which a magnetostrictive body M adapted to be energized at its natural frequency of vibration is suspended by resilient spacing members S in a jacket J of insulating material. The bottom of this jacket is open to the sea or other liquid medium and is provided with a flange F for attachment to the ship's bottom. The disposition of the magnetic circuit and of the energizing and polarizing windings is similar to that described in Specification 402,123 and comprises E-shaped yokes Y on either side of the body M and coils L as shown. The body may have a single winding associated therewith for both transmission and reception or two separate windings may be employed one for transmission and the other for reception. Fig. 2 shows a modification in which the jacket J is dispensed with and the body is mounted horizontally within a reflector R shaped so that all waves, whether reflected or direct, are in phase.
GB1647432A 1932-06-10 1932-06-10 Improvements in or relating to pressure wave transmitters and receivers incorporating magneto-strictive devices Expired GB402830A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1647432A GB402830A (en) 1932-06-10 1932-06-10 Improvements in or relating to pressure wave transmitters and receivers incorporating magneto-strictive devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1647432A GB402830A (en) 1932-06-10 1932-06-10 Improvements in or relating to pressure wave transmitters and receivers incorporating magneto-strictive devices

Publications (1)

Publication Number Publication Date
GB402830A true GB402830A (en) 1933-12-11

Family

ID=10077988

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1647432A Expired GB402830A (en) 1932-06-10 1932-06-10 Improvements in or relating to pressure wave transmitters and receivers incorporating magneto-strictive devices

Country Status (1)

Country Link
GB (1) GB402830A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2444967A (en) * 1936-03-23 1948-07-13 Submarine Signal Co Oscillator
DE767260C (en) * 1938-11-11 1952-04-15 Atlas Werke Ag Device for sending and receiving sound waves in water
US2961638A (en) * 1955-04-25 1960-11-22 Jr Louis R Padberg Magnetostrictive electro-acoustical transducer

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2444967A (en) * 1936-03-23 1948-07-13 Submarine Signal Co Oscillator
DE767260C (en) * 1938-11-11 1952-04-15 Atlas Werke Ag Device for sending and receiving sound waves in water
US2961638A (en) * 1955-04-25 1960-11-22 Jr Louis R Padberg Magnetostrictive electro-acoustical transducer

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