GB947145A - Improvements in or relating to electromechanical filters - Google Patents

Improvements in or relating to electromechanical filters

Info

Publication number
GB947145A
GB947145A GB4170658A GB4170658A GB947145A GB 947145 A GB947145 A GB 947145A GB 4170658 A GB4170658 A GB 4170658A GB 4170658 A GB4170658 A GB 4170658A GB 947145 A GB947145 A GB 947145A
Authority
GB
United Kingdom
Prior art keywords
resonators
coupling necks
filter
necks
polytetrafluorethylene
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
GB4170658A
Inventor
Albert Russen
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB4170658A priority Critical patent/GB947145A/en
Priority to CH8198459A priority patent/CH380830A/en
Publication of GB947145A publication Critical patent/GB947145A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H3/00—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators
    • H03H3/007—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators for the manufacture of electromechanical resonators or networks
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F13/00—Apparatus or processes for magnetising or demagnetising
    • H01F13/003—Methods and devices for magnetising permanent magnets
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
    • H03H9/46—Filters
    • H03H9/48—Coupling means therefor
    • H03H9/50—Mechanical coupling means
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
    • H03H9/46—Filters
    • H03H9/62—Filters comprising resonators of magnetostrictive material

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)

Abstract

947,145. Electro-mechanical filters. STANDARD TELEPHONES & CABLES Ltd. Dec. 18, 1959 [Dec. 24, 1958], No. 41706/58. Heading H3U. An electromechanical filter comprises a plurality of torsional resonators 38, 40, 41, 42, 39 of dumb-bell form connected together by separate coupling necks 43, 44, 45, 46. The resonators can be less than half a wavelength long. The resonators 38 and 39 are circularly polarized magnetically and form the cores of transducer units having driving coils 36, 37. At least one of the coupling necks, e.g. 43 and 46 is in the form of a solid of revolution composed of three successive cylindrical sections of which the intermediate section is of larger diameter than either of the end sections. The resonators 40, 41 and 42 can be of " Ni-Span-C " (Registered Trade Mark) and the transducer resonators 38, 39 of a nickel-zinc ferrite. The coupling necks can be of brass having a force fit in an axial hole in the resonators. The filter is supported at the ends by pivots 47, 48 of polytetrafluorethylene which engage central bores in the resonators 38, 39. Intermediate support for the filter is provided by two annular bearings 49, 50 of polytetrafluorethylene surrounding the coupling necks 44, 45 and fixed in circular holes in brackets 33 and 34. Dimensions and electrical characteristics are stated.
GB4170658A 1958-12-24 1958-12-24 Improvements in or relating to electromechanical filters Expired GB947145A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB4170658A GB947145A (en) 1958-12-24 1958-12-24 Improvements in or relating to electromechanical filters
CH8198459A CH380830A (en) 1958-12-24 1959-12-18 Electromechanical filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4170658A GB947145A (en) 1958-12-24 1958-12-24 Improvements in or relating to electromechanical filters

Publications (1)

Publication Number Publication Date
GB947145A true GB947145A (en) 1964-01-22

Family

ID=10420982

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4170658A Expired GB947145A (en) 1958-12-24 1958-12-24 Improvements in or relating to electromechanical filters

Country Status (2)

Country Link
CH (1) CH380830A (en)
GB (1) GB947145A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3823470A (en) * 1970-09-29 1974-07-16 Siemens Ag Method and apparatus for trimming mechanical filters
WO2013127721A1 (en) * 2012-03-01 2013-09-06 Nctengineering Gmbh Contactless magnetization of hollow shafts

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3823470A (en) * 1970-09-29 1974-07-16 Siemens Ag Method and apparatus for trimming mechanical filters
WO2013127721A1 (en) * 2012-03-01 2013-09-06 Nctengineering Gmbh Contactless magnetization of hollow shafts

Also Published As

Publication number Publication date
CH380830A (en) 1964-08-15

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