GB514604A - Magnet system - Google Patents

Magnet system

Info

Publication number
GB514604A
GB514604A GB2910/38A GB291038A GB514604A GB 514604 A GB514604 A GB 514604A GB 2910/38 A GB2910/38 A GB 2910/38A GB 291038 A GB291038 A GB 291038A GB 514604 A GB514604 A GB 514604A
Authority
GB
United Kingdom
Prior art keywords
plastic
jan
rubber
soft iron
magnet
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
GB2910/38A
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.)
Deutsche Edelstahlwerke AG
Original Assignee
Deutsche Edelstahlwerke 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 Deutsche Edelstahlwerke AG filed Critical Deutsche Edelstahlwerke AG
Publication of GB514604A publication Critical patent/GB514604A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/025—Magnetic circuit

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

514,604. Telephone instruments. DEUTSCHE EDELSTAHLWERKE AKT.-GES. Jan. 29, 1938, No. 2910. Void. Convention date, Jan. 29, 1937. [Class 40 (iv)] [Also in Group XXXV] In a magnet system built up of separate components, a ferromagnetic plastic is used to obtain a low "transitional resistance " or reluctance at the joints. In the annular gap loud. speaker magnet shown, layers 2 of the plastic are placed between the surfaces of the permanent magnet 1 and the soft iron end plates 3. The whole is compressed in a press until the central pole-piece 5 is brought to the proper relationship with the upper pole plate 3, whereupon the assembly is fixed together by' the bolts 4. The surfaces of the two parts to be joined may be roughened. The plastic may consist of soft iron powder, obtained by precipitation from iron carbonyl, made into a paste with water glass, tragacanth, rubber, shellac or cement, or made into a springy, rubber-like form by admixture with a moulding powder and stamped to the desired shape from large sheets. The invention is applicable to permanent or electromagnets.
GB2910/38A 1937-01-29 1938-01-29 Magnet system Expired GB514604A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE514604X 1937-01-29

Publications (1)

Publication Number Publication Date
GB514604A true GB514604A (en) 1939-11-13

Family

ID=6548716

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2910/38A Expired GB514604A (en) 1937-01-29 1938-01-29 Magnet system

Country Status (1)

Country Link
GB (1) GB514604A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2772381A (en) * 1951-06-25 1956-11-27 Swing A Way Mfg Company Magnetic lid lifter for can openers
US4388131A (en) * 1977-05-02 1983-06-14 Burroughs Corporation Method of fabricating magnets

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2772381A (en) * 1951-06-25 1956-11-27 Swing A Way Mfg Company Magnetic lid lifter for can openers
US4388131A (en) * 1977-05-02 1983-06-14 Burroughs Corporation Method of fabricating magnets

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