[go: up one dir, main page]

NL8005917A - Elektrodynamische geluidsomzetter. - Google Patents

Elektrodynamische geluidsomzetter. Download PDF

Info

Publication number
NL8005917A
NL8005917A NL8005917A NL8005917A NL8005917A NL 8005917 A NL8005917 A NL 8005917A NL 8005917 A NL8005917 A NL 8005917A NL 8005917 A NL8005917 A NL 8005917A NL 8005917 A NL8005917 A NL 8005917A
Authority
NL
Netherlands
Prior art keywords
core
workpiece
sound transducer
workpiece surface
spacer
Prior art date
Application number
NL8005917A
Other languages
English (en)
Dutch (nl)
Original Assignee
Hoesch Estel Werke Ag
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 Hoesch Estel Werke Ag filed Critical Hoesch Estel Werke Ag
Publication of NL8005917A publication Critical patent/NL8005917A/nl

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/22—Details, e.g. general constructional or apparatus details
    • G01N29/24—Probes
    • G01N29/2412—Probes using the magnetostrictive properties of the material to be examined, e.g. electromagnetic acoustic transducers [EMAT]

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
  • Electromagnets (AREA)
NL8005917A 1979-12-07 1980-10-29 Elektrodynamische geluidsomzetter. NL8005917A (nl)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2949256A DE2949256C2 (de) 1979-12-07 1979-12-07 Elektrodynamischer Schallwandler
DE2949256 1979-12-07

Publications (1)

Publication Number Publication Date
NL8005917A true NL8005917A (nl) 1981-07-01

Family

ID=6087836

Family Applications (1)

Application Number Title Priority Date Filing Date
NL8005917A NL8005917A (nl) 1979-12-07 1980-10-29 Elektrodynamische geluidsomzetter.

Country Status (8)

Country Link
US (1) US4337662A (it)
BE (1) BE886487A (it)
DE (1) DE2949256C2 (it)
FR (1) FR2471604A1 (it)
GB (1) GB2064772B (it)
IT (1) IT1146062B (it)
LU (1) LU82982A1 (it)
NL (1) NL8005917A (it)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8200586A (nl) * 1982-02-16 1983-09-16 Fokker Bv Omzetter van elektrische in mechanische trillingen ten behoeve van het niet-destructief onderzoek van objecten.
US4449411A (en) * 1982-04-22 1984-05-22 Magnetic Analysis Corporation Magnetic and ultrasonic objects testing apparatus
US4449408A (en) * 1982-04-22 1984-05-22 Magnetic Analysis Corporation EMAT Test apparatus having retractable probe
JPS59222409A (ja) * 1983-06-01 1984-12-14 Nippon Redarii Kk 消炎鎮痛ゲル軟膏剤
DE3401072C2 (de) * 1984-01-13 1986-04-10 Nukem Gmbh, 6450 Hanau Elektrodynamischer Wandlerkopf
DE3603153A1 (de) 1986-02-01 1987-08-06 Nukem Gmbh Anordnung fuer die zerstoerungsfreie pruefung von zylinderfoermigen werkstuecken
DE3614069A1 (de) * 1986-04-24 1987-11-12 Mannesmann Ag Vorrichtung zur zerstoerungsfreien pruefung durch ultraschall
DE3627098A1 (de) * 1986-08-09 1988-02-18 Foerster Inst Dr Friedrich Pruefeinrichtung zum zerstoerungsfreien pruefen
DE102008054250A1 (de) * 2008-10-24 2010-04-29 Institut Dr. Foerster Gmbh & Co. Kg Elektromagnetisch-akustischer Messwandler und Ultraschall-Prüfsystem damit

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB649518A (en) * 1946-05-10 1951-01-31 Sperry Prod Inc Improvements in or relating to supersonic transmitting apparatus
FR1108397A (fr) * 1954-07-06 1956-01-12 Acec Transducteur ultra-sonore pour le contrôle de matériaux ferromagnétiques
US3019637A (en) * 1959-03-24 1962-02-06 Curtiss Wright Corp Ultrasonic testing arrangement
DE2643601C3 (de) * 1976-09-28 1979-03-08 Hoesch Werke Ag, 4600 Dortmund Verfahren zur zerstörungsfreien Werkstoffprüfung mit Ultraschall unter Verwendung eines elektrodynamischen Schallwandlers
SU596917A2 (ru) * 1976-11-15 1978-03-05 Центральная научно-исследовательская лаборатория Производственного объединения "Укрнефть" Устройство дл ориентации датчика
JPS5441187A (en) * 1977-09-08 1979-04-02 Nippon Kokan Kk Device for detecting surface flaw of columnar or cylindrical metal
DE2815228C3 (de) * 1978-04-08 1980-11-27 Institut Dr. Friedrich Foerster Pruefgeraetebau, 7410 Reutlingen Prüfanordnung für die zerstörungsfreie Prüfung von metallischem Prüfgut

Also Published As

Publication number Publication date
US4337662A (en) 1982-07-06
DE2949256A1 (de) 1981-06-04
FR2471604B1 (it) 1985-01-04
FR2471604A1 (fr) 1981-06-19
DE2949256C2 (de) 1983-07-28
IT1146062B (it) 1986-11-12
BE886487A (fr) 1981-06-04
GB2064772B (en) 1983-10-19
IT8050177A0 (it) 1980-11-17
LU82982A1 (de) 1981-03-26
GB2064772A (en) 1981-06-17

Similar Documents

Publication Publication Date Title
WO2001038123B1 (en) Apparatus including eddy current braking system
NL8005917A (nl) Elektrodynamische geluidsomzetter.
HU9400916D0 (en) System for analysing tes papers
US6585140B2 (en) Driver system for reducing the speed of or dragging metal strips
KR900002944A (ko) 고속 셔틀 프린터
CA2117185A1 (en) Paper web reeling system including braking and controlled drum pressure application means
CA2408024A1 (en) Braking device for a lift
EP0876923A3 (en) Printer with a movable paper guide mechanism and method of setting recording paper in such printer
JPH01162143U (it)
US4478528A (en) Wire matrix print head assembly
US4732498A (en) Needle matrix printer
US7815283B2 (en) Printer with a movable carriage
US4121518A (en) High speed printer hammer assembly
KR200315505Y1 (it)
EP0026623B1 (en) Wire matrix print head assembly
JP2561533B2 (ja) 一定揚力供給機構
KR920700830A (ko) 와이어 장력 제어 장치
JPS5593469A (en) Dot printer head
KR900015820A (ko) 배열된 다수 요소의 상대위치를 수정하는 방법 및 상기 방법을 실시하기 위한 장치
JP2001002250A5 (ja) 給紙トレイおよび画像形成装置
TW513842B (en) Linear drive
JPS5642666A (en) Impact type dot printer
JPH04343637A (ja) テーブル移動機構
JPS6220290Y2 (it)
US3834303A (en) High speed line printing apparatus

Legal Events

Date Code Title Description
A85 Still pending on 85-01-01
BA A request for search or an international-type search has been filed
BB A search report has been drawn up
BC A request for examination has been filed
BV The patent application has lapsed