GB767915A - Mechanical filter with impedance matching discs - Google Patents

Mechanical filter with impedance matching discs

Info

Publication number
GB767915A
GB767915A GB9166/55A GB916655A GB767915A GB 767915 A GB767915 A GB 767915A GB 9166/55 A GB9166/55 A GB 9166/55A GB 916655 A GB916655 A GB 916655A GB 767915 A GB767915 A GB 767915A
Authority
GB
United Kingdom
Prior art keywords
discs
tuned
filter
attached
impedance matching
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
GB9166/55A
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.)
Collins Radio Co
Original Assignee
Collins Radio Co
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 Collins Radio Co filed Critical Collins Radio Co
Publication of GB767915A publication Critical patent/GB767915A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
    • H03H9/02—Details
    • H03H9/125—Driving means, e.g. electrodes, coils
    • H03H9/135—Driving means, e.g. electrodes, coils for networks consisting of magnetostrictive materials
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)

Abstract

767,915. Electro-mechanical filters. COLLINS RADIO CO. March 29, 1955 [June 16, 1954], No. 9166/55. Class 40 (8). An electro-mechanical filter comprises a resonant structure consisting of a number of parallel spaced discs attached to their peripheries to coupling wires 39, alternate discs 32, 34, 36, 38 being tuned to the resonant frequency, other discs 33, 35, 37 being tuned to frequencies above or below the band-pass of the filter. The off-tuned discs behave as impedance matching elements and their effect is to reduce the bandwidth of the filter. The input and output means consist of magneto-strictive rods 40, 41 which extend through coils 23 (one only shown) and are attached at their ends to discs 32, 38 respectively. The coils 11 are surrounded by brass tubes 21 above which are mounted polarizing magnets 29. The first and last discs 25, 30 are rigidly attached to the brass tubes 21 and do not form part of the vibrating system. The Specification contains a discussion of the electrical analogue of the system. Specifications 722,645 and 722,664 are referred to.
GB9166/55A 1954-06-16 1955-03-29 Mechanical filter with impedance matching discs Expired GB767915A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US437197A US2930006A (en) 1954-06-16 1954-06-16 Mechanical filter with impedance matching discs

Publications (1)

Publication Number Publication Date
GB767915A true GB767915A (en) 1957-02-06

Family

ID=23735490

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9166/55A Expired GB767915A (en) 1954-06-16 1955-03-29 Mechanical filter with impedance matching discs

Country Status (2)

Country Link
US (1) US2930006A (en)
GB (1) GB767915A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3135933A (en) * 1962-07-26 1964-06-02 Collins Radio Co M derived mechanical filter
US3699483A (en) * 1971-05-26 1972-10-17 Collins Radio Co Rugged, narrow bandwidth mechanical filter
KR20030005232A (en) 2000-03-23 2003-01-17 덴츠플라이 인터내셔널 인코포레이티드 Tooth whitening material and method of whitening teeth
US6685923B2 (en) 2001-01-25 2004-02-03 Dentsply Research & Development Corp. Tooth whitening material and method of whitening teeth

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2161593A (en) * 1935-03-29 1939-06-06 Rca Corp Band-pass filter
GB686016A (en) * 1949-03-30 1953-01-14 Rca Corp Improvements in electromechanical filters
US2617882A (en) * 1950-05-29 1952-11-11 Rca Corp Maximal flatness filter
US2693579A (en) * 1952-04-21 1954-11-02 Collins Radio Co Longitudinal support of mechanical filter
US2656516A (en) * 1952-08-14 1953-10-20 Collins Radio Co Filter using transverse supporting means
US2762985A (en) * 1952-09-20 1956-09-11 Rca Corp Mechanically resonant filter devices
US2774042A (en) * 1953-04-29 1956-12-11 Bell Telephone Labor Inc Electromechanical wave filter
US2777999A (en) * 1953-05-07 1957-01-15 Collins Radio Co Frequency rejection system for mechanical filter
US2802992A (en) * 1953-05-07 1957-08-13 Collins Radio Co Elimination of spurious response in an electromechanical filter
US2821686A (en) * 1955-07-15 1958-01-28 Rca Corp Mechanical filters including rejectors

Also Published As

Publication number Publication date
US2930006A (en) 1960-03-22

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