US2476778A - Magnetostrictive device - Google Patents
Magnetostrictive device Download PDFInfo
- 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
- Authority
- US
- United States
- Prior art keywords
- members
- magnetostriction
- magnetostrictive
- vibrating element
- sign
- 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 - Lifetime
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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
- 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)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR955361D FR955361A (ko) | 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 |
Family
ID=24728907
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US679914A Expired - Lifetime US2476778A (en) | 1946-06-28 | 1946-06-28 | Magnetostrictive device |
Country Status (2)
Country | Link |
---|---|
US (1) | US2476778A (ko) |
FR (1) | FR955361A (ko) |
Cited By (11)
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 |
EP1035596A2 (en) * | 1999-03-05 | 2000-09-13 | Honda Giken Kogyo Kabushiki Kaisha | Super magnetostrictive actuator |
Citations (2)
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 |
-
0
- FR FR955361D patent/FR955361A/fr not_active Expired
-
1946
- 1946-06-28 US US679914A patent/US2476778A/en not_active Expired - Lifetime
Patent Citations (2)
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 (12)
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 |
EP1035596A2 (en) * | 1999-03-05 | 2000-09-13 | Honda Giken Kogyo Kabushiki Kaisha | Super magnetostrictive actuator |
EP1035596B1 (en) * | 1999-03-05 | 2009-04-08 | Honda Giken Kogyo Kabushiki Kaisha | Super magnetostrictive actuator |
Also Published As
Publication number | Publication date |
---|---|
FR955361A (ko) | 1950-01-14 |
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