US2476778A - Magnetostrictive device - Google Patents

Magnetostrictive device Download PDF

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Publication number
US2476778A
US2476778A US679914A US67991446A US2476778A US 2476778 A US2476778 A US 2476778A US 679914 A US679914 A US 679914A US 67991446 A US67991446 A US 67991446A US 2476778 A US2476778 A US 2476778A
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United States
Prior art keywords
members
magnetostriction
magnetostrictive
vibrating element
sign
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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
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US679914A
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English (en)
Inventor
Smoluchowski Roman
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.)
General Electric Co
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General Electric Co
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Filing date
Publication date
Priority to FR955361D priority Critical patent/FR955361A/fr
Application filed by General Electric Co filed Critical General Electric Co
Priority to US679914A priority patent/US2476778A/en
Application granted granted Critical
Publication of US2476778A publication Critical patent/US2476778A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • B06B1/085—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with magnetostriction using multiple elements, e.g. arrays

Definitions

  • the present invention relates to magnetostrictive devices and more particularly to the vibratnetostriction of even the most suitable magnetic material is relatively small, any application requiring a high intensity impulse requires a vibrating element of considerable length and hence, a vibrator of considerable size.
  • One of the objects of my invention is to pro-.- vide a new and improved magnetic device which has a greater effective magnetostriction per unit length of the device.
  • Another object of my invention is to provide a new and improved magnetostrictive vibrator.
  • a further object of my invention is to provide a new and improved vibrating element for a magnetostrictive vibrator.
  • Still another object of my invention is to provide a new and improved arrangement of magnetic materials having opposite characteristics of magnetostriction so that a greater effective magnetostriction per unit length is secured.
  • FIG. 1 is a front elevation partly in section of a degasing apparatus illustrating one application of a magnetostrictive vibrator embodying my invention
  • Figure 2 is a perspective view of a vibrating element illustrating one embodiment of my invention
  • Figure 3 is a perspective view of a vibrating element with the individual members bent lengthwise to add stiffness to the members
  • Figure 4 is a sectional view of a vibrating element comprising thin concentric members for 2 maximum stifi'ness
  • Figure 5 is a perspective view of a vibrating element formed in a helix to obtain maximum magnetostrictlon accruing from length of the element.
  • apparatus for degasifying liquids which comprises a base I, a liquid receptacle or crucible 2 on a platform 3 supported by a vibrating element 6 attached to base I and platform 3 and axially disposed within a coil 5 of a magnetostrictive vibrator 6.
  • Coil 5 of the magnetostrictive vibrator 6 may be connected by conductors l and 8 to any suitable source of alternating current or voltage and when energized by such a source, platform 3 is reciprocated vertically on guide rods 9 fixed to the base l.
  • Such reciprocation or agitation of the liquid within the crucible 2 effects a mechanical separation of entrapped gas.
  • FIG. 2 diagrammatically illustrates a vibrat ing element comprising three flat members III,-
  • members l0 and I2 are of a magnetostrictive material having a positive sign of magnetostrictive material while member H is of a material having a negative sign of magnetostriction.
  • positive sign of magnetostriction I mean that the material has that property of expanding its dimensions upon being energized magnetically and conversely by negative sign of magetostriction
  • any material having a positive sign of magnetostriction would be suitable for members 10 and I2. However, I have found that an alloy containing 50% iron and 50% cobalt is particularly suitable. Another material which I have found to have a good positive magnetostrictive characteristic is an alloy containing 20-80% cobalt, 0.5-1.0% vanadium and the balance iron. Any material having a negative characteristic of magnetostriction is suitable for the intermediate I have found that leaving a slight space between members is quite satisfactory although it is obvious that other means may be employed.
  • Figure 3 of the drawing diagrammatically illustrates a modification of the vibrating element illustrated in Figure 2 comprising members i3 and i having a positive magnetostrictive characteristic and member it having a negative magnetostrictive characteristic, all of which have been bent at an angle forming, in effect, a channel extending lengthwise of'the members.
  • a third modification illustrated by Figure 5 of the drawing comprises an arrangement of three elongated flat members formed into a helix.
  • a member 20 of negative sign of magnetostriction is spaced intermediate two members I9 and 2
  • the three flat members are connected with suitable spacing in the same manner as described for Figure 2 and the assembly is bent as a unit into a helix.
  • this form of vibrating element it is possible to combine a maximum magnetostrictive effect per unit length of vibrating element with maximum length of vibrating element.
  • the present vibrating element will find particularly useful application in magnetostrictive vibrators for degasifying oils, and molten metals it is also satisfactory for use in high frequency impulse generators and when energized by a direct current voltage or current would be suitable as a latching device.
  • a magnetostrictive vibrator comprising a plurality of mechanically connected V shaped members of opposite sign of magnetostriction, said members being alternately arranged.
  • a magnetostrictive vibrator comprising a plurality of members of opposite sign of magnetostriction, said members being alternately arranged and describing a helix.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
US679914A 1946-06-28 1946-06-28 Magnetostrictive device Expired - Lifetime US2476778A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR955361D FR955361A (en, 2012) 1946-06-28
US679914A US2476778A (en) 1946-06-28 1946-06-28 Magnetostrictive device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US679914A US2476778A (en) 1946-06-28 1946-06-28 Magnetostrictive device

Publications (1)

Publication Number Publication Date
US2476778A true US2476778A (en) 1949-07-19

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Family Applications (1)

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US679914A Expired - Lifetime US2476778A (en) 1946-06-28 1946-06-28 Magnetostrictive device

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US (1) US2476778A (en, 2012)
FR (1) FR955361A (en, 2012)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2621260A (en) * 1947-01-24 1952-12-09 Sykes Adrian Francis Electrical sound recording, reproducing, and like apparatus
US2920529A (en) * 1952-05-23 1960-01-12 Blythe Richard Electronic control of optical and near-optical radiation
US3174130A (en) * 1960-05-27 1965-03-16 Ralph S Woollett Magnetostrictive flexural-mode electromechanical transducer
US3349304A (en) * 1965-04-05 1967-10-24 William J Wachter Longitudinal movement mechanism
US3360109A (en) * 1966-03-21 1967-12-26 Sigma Engineering Service Inc Bowl feeder
US3439199A (en) * 1965-05-26 1969-04-15 Gunnar M Bergstrand Magnetostrictive unit
US3488587A (en) * 1966-04-04 1970-01-06 Honeywell Inc Magnetostrictive electromechanical galvanometer apparatus
US3740674A (en) * 1972-01-06 1973-06-19 Us Navy Scroll transducer
US4160232A (en) * 1973-04-19 1979-07-03 Westinghouse Electric Corp. Low frequency dipole hydrophone transducer
US4160231A (en) * 1973-04-19 1979-07-03 Westinghouse Electric Corp. Low frequency dipole hydrophone transducer
EP1035596B1 (en) * 1999-03-05 2009-04-08 Honda Giken Kogyo Kabushiki Kaisha Super magnetostrictive actuator

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US436514A (en) * 1890-09-16 Telephone-relay
US1889153A (en) * 1928-08-17 1932-11-29 Pierce George Washington Acoustic electric energy converter

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US436514A (en) * 1890-09-16 Telephone-relay
US1889153A (en) * 1928-08-17 1932-11-29 Pierce George Washington Acoustic electric energy converter

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2621260A (en) * 1947-01-24 1952-12-09 Sykes Adrian Francis Electrical sound recording, reproducing, and like apparatus
US2920529A (en) * 1952-05-23 1960-01-12 Blythe Richard Electronic control of optical and near-optical radiation
US3174130A (en) * 1960-05-27 1965-03-16 Ralph S Woollett Magnetostrictive flexural-mode electromechanical transducer
US3349304A (en) * 1965-04-05 1967-10-24 William J Wachter Longitudinal movement mechanism
US3439199A (en) * 1965-05-26 1969-04-15 Gunnar M Bergstrand Magnetostrictive unit
US3360109A (en) * 1966-03-21 1967-12-26 Sigma Engineering Service Inc Bowl feeder
US3488587A (en) * 1966-04-04 1970-01-06 Honeywell Inc Magnetostrictive electromechanical galvanometer apparatus
US3740674A (en) * 1972-01-06 1973-06-19 Us Navy Scroll transducer
US4160232A (en) * 1973-04-19 1979-07-03 Westinghouse Electric Corp. Low frequency dipole hydrophone transducer
US4160231A (en) * 1973-04-19 1979-07-03 Westinghouse Electric Corp. Low frequency dipole hydrophone transducer
EP1035596B1 (en) * 1999-03-05 2009-04-08 Honda Giken Kogyo Kabushiki Kaisha Super magnetostrictive actuator

Also Published As

Publication number Publication date
FR955361A (en, 2012) 1950-01-14

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