FR2244245A1 - Noise suppressing screening for power supply transformers - uses perforated steel plate for suppression in quiet rooms e.g. office - Google Patents

Noise suppressing screening for power supply transformers - uses perforated steel plate for suppression in quiet rooms e.g. office

Info

Publication number
FR2244245A1
FR2244245A1 FR7426332A FR7426332A FR2244245A1 FR 2244245 A1 FR2244245 A1 FR 2244245A1 FR 7426332 A FR7426332 A FR 7426332A FR 7426332 A FR7426332 A FR 7426332A FR 2244245 A1 FR2244245 A1 FR 2244245A1
Authority
FR
France
Prior art keywords
suppression
power supply
transformer
screening
office
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.)
Withdrawn
Application number
FR7426332A
Other languages
English (en)
French (fr)
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.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
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 International Business Machines Corp filed Critical International Business Machines Corp
Publication of FR2244245A1 publication Critical patent/FR2244245A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/33—Arrangements for noise damping
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/36—Electric or magnetic shields or screens
    • H01F27/363—Electric or magnetic shields or screens made of electrically conductive material

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
  • Regulation Of General Use Transformers (AREA)
  • Housings And Mounting Of Transformers (AREA)
FR7426332A 1973-09-14 1974-07-25 Noise suppressing screening for power supply transformers - uses perforated steel plate for suppression in quiet rooms e.g. office Withdrawn FR2244245A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA181,059A CA1010979A (en) 1973-09-14 1973-09-14 Magnetic field shielding for acoustic noise control

Publications (1)

Publication Number Publication Date
FR2244245A1 true FR2244245A1 (en) 1975-04-11

Family

ID=4097813

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7426332A Withdrawn FR2244245A1 (en) 1973-09-14 1974-07-25 Noise suppressing screening for power supply transformers - uses perforated steel plate for suppression in quiet rooms e.g. office

Country Status (7)

Country Link
JP (1) JPS5055827A (enExample)
CA (1) CA1010979A (enExample)
CH (1) CH571760A5 (enExample)
DE (1) DE2441547A1 (enExample)
ES (1) ES430022A1 (enExample)
FR (1) FR2244245A1 (enExample)
IT (1) IT1017110B (enExample)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2646010A1 (fr) * 1989-04-07 1990-10-19 Bosch Siemens Hausgeraete Transformateur haute tension, en particulier pour appareils menagers
FR2831383A1 (fr) * 2001-10-24 2003-04-25 Bosch Gmbh Robert Circuit imprime pour un appareil de commande ou une barrette de connexion

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5332449U (enExample) * 1976-08-26 1978-03-20
DE2939533C2 (de) * 1979-09-28 1983-08-25 Siemens AG, 1000 Berlin und 8000 München Schallgedämpftes elektrisches Bauelement, insbesondere Drossel

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2646010A1 (fr) * 1989-04-07 1990-10-19 Bosch Siemens Hausgeraete Transformateur haute tension, en particulier pour appareils menagers
FR2831383A1 (fr) * 2001-10-24 2003-04-25 Bosch Gmbh Robert Circuit imprime pour un appareil de commande ou une barrette de connexion

Also Published As

Publication number Publication date
DE2441547A1 (de) 1975-04-24
CA1010979A (en) 1977-05-24
CH571760A5 (enExample) 1976-01-15
IT1017110B (it) 1977-07-20
ES430022A1 (es) 1976-09-16
JPS5055827A (enExample) 1975-05-16

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Legal Events

Date Code Title Description
ST Notification of lapse