GB714118A - Improvements in or relating to electromechanical vibrators - Google Patents

Improvements in or relating to electromechanical vibrators

Info

Publication number
GB714118A
GB714118A GB1624352A GB1624352A GB714118A GB 714118 A GB714118 A GB 714118A GB 1624352 A GB1624352 A GB 1624352A GB 1624352 A GB1624352 A GB 1624352A GB 714118 A GB714118 A GB 714118A
Authority
GB
United Kingdom
Prior art keywords
winding
transformer
conductive
magnetic
electromechanical
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
GB1624352A
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.)
Philips Electronics UK Ltd
Original Assignee
Philips Electronics UK Ltd
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
Priority to NL313249X priority Critical
Application filed by Philips Electronics UK Ltd filed Critical Philips Electronics UK Ltd
Publication of GB714118A publication Critical patent/GB714118A/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H03BASIC ELECTRONIC CIRCUITRY
    • H03HIMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
    • H03H9/46Filters
    • H03H9/62Filters comprising resonators of magnetostrictive material
    • HELECTRICITY
    • H03BASIC ELECTRONIC CIRCUITRY
    • H03HIMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
    • H03H9/02Details
    • H03H9/125Driving means, e.g. electrodes, coils
    • H03H9/135Driving means, e.g. electrodes, coils for networks consisting of magnetostrictive materials
    • HELECTRICITY
    • H03BASIC ELECTRONIC CIRCUITRY
    • H03HIMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
    • H03H9/22Constructional features of resonators consisting of magnetostrictive material

Abstract

714,118. Electromechanical impedances. PHILIPS ELECTRICAL INDUSTRIES, Ltd. June 27, 1952 [July 2, 1951; July 2, 1951], No. 16243/52. Class 40 (8) An electromechanical vibrator which may be used as a tuned impedance arm or as a filter comprises a hollow magnetostrictive member made of solid, highly-permeable non-conductive material and having rotational symmetry about an axis, one member being laced in a polarizing magnetic field substantially parallel with said axis and linked with a winding which sets up a tangential oscillatory field in the member to cause it to execute torsional vibrations. An annulus 1, Fig. 1, is arranged in a polarizing field Ho produced by the permanent magnets 3 and 4 held in the ferro-magnetic support circuit 11, 12, 13. A winding 2 supplied with alternating current is arranged about a section 10 of member 1, with the result that member 1 is set in torsionl vibration. Member 1 is supported in its nodal plane by means of studs 7 and 8. In modifications, the circuit producing the permanent field Ho and the method of supporting member 1 may be altered to produce a more compact construction, as in Figs. 3, 4 and 8 (not shown). The impedance characteristic of these four forms of the device is as shown in the curve a of Fig. 2. The initial impedance Zo shown in Fig. 2 can be compensated by the use of two coils 2, 2' (Fig. 5), coupled together by a suitably proportioned transformer 15 so that the input current, for example, traverses the winding 2 and the primary of transformer 15 in opposite sense, and for example traverses the winding 2 and the secondary of transformer 15 in the same sense. A modification comprises two vibrator members 1, 1<SP>1</SP> (Fig. 6) each supported in their nodal planes by means not shown, the input winding 2 being arranged around member 1, and the output winding 2' around member 1'. Members 1 and 1<SP>1</SP> are mechanically intercoupled by the non-magnetic elements 18, 19 and 20 and the band-pass characteristic of Fig. 7 is obtained. The solid non-conductive material of which one annulus is made may be a nickel-zinc ferrite and the permanent magnets may be made of the non-conductive material referred to in Specification 708,127, [Group XXXV]. Specification 664,174 also is referred to.
GB1624352A 1951-07-02 1952-06-27 Improvements in or relating to electromechanical vibrators Expired GB714118A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
NL313249X 1951-07-02

Publications (1)

Publication Number Publication Date
GB714118A true GB714118A (en) 1954-08-25

Family

ID=19783704

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1624352A Expired GB714118A (en) 1951-07-02 1952-06-27 Improvements in or relating to electromechanical vibrators

Country Status (7)

Country Link
US (1) US2692344A (en)
BE (2) BE512514A (en)
CH (1) CH313249A (en)
DE (2) DE969549C (en)
FR (2) FR1068674A (en)
GB (1) GB714118A (en)
NL (5) NL170958B (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2770782A (en) * 1952-08-30 1956-11-13 Rca Corp Frequency selective coupling system
GB775432A (en) * 1954-06-23 1957-05-22 Marconi Wireless Telegraph Co Improvements in or relating to magneto-strictive resonators
US2876419A (en) * 1954-12-01 1959-03-03 Bell Telephone Labor Inc Magnetostriction devices
BE554942A (en) * 1956-02-14
NL114040C (en) * 1957-03-22
DE1616692B1 (en) * 1962-03-22 1970-03-05 Telefunken Patent Frequency-selective arrangement in the manner of an electromagnetic filter that can be used as a delay chain
DE1279863B (en) * 1962-07-28 1968-10-10 Ibm Deutschland Electroacoustic converter for a torsional vibration transmitting delay line
US3283184A (en) * 1963-11-04 1966-11-01 Phillips Petroleum Co Detonation pickup

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2249835A (en) * 1937-11-11 1941-07-22 Bell Telephone Labor Inc Magnetostrictive vibrator
US2452531A (en) * 1943-05-31 1948-10-26 Hartford Nat Bank & Trust Co Process of manufacturing a magnetic material and magnetic core
GB576275A (en) * 1944-01-10 1946-03-27 High Duty Alloys Ltd Improvements in apparatus for exciting or detecting torsional oscillations in elastic bodies
US2521136A (en) * 1949-04-28 1950-09-05 Commerce National Bank Of Hydrophone

Also Published As

Publication number Publication date
BE512514A (en)
FR64457E (en) 1955-11-10
NL170958B (en)
NL83690C (en)
DE970150C (en) 1958-08-21
DE969549C (en) 1958-06-19
NL162356B (en)
US2692344A (en) 1954-10-19
CH313249A (en) 1956-03-31
BE521272A (en)
NL162357B (en)
NL77918C (en)
FR1068674A (en) 1954-06-30

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