GB722664A - Electro-mechanical filters - Google Patents

Electro-mechanical filters

Info

Publication number
GB722664A
GB722664A GB166953A GB166953A GB722664A GB 722664 A GB722664 A GB 722664A GB 166953 A GB166953 A GB 166953A GB 166953 A GB166953 A GB 166953A GB 722664 A GB722664 A GB 722664A
Authority
GB
United Kingdom
Prior art keywords
discs
peripheries
input
rods
output
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
GB166953A
Inventor
Melvin Louis Doelz
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
Priority to GB166953A priority Critical patent/GB722664A/en
Publication of GB722664A publication Critical patent/GB722664A/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
    • H03H9/46—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)

Abstract

722,664. Magneto-strictive filters. COLLINS RADIO CO. Jan. 20, 1953, No. 1669/53. Class 40 (8). An electromechanical filter comprises a series of discs 14-20 joined by a number of rods 21 attached, e.g. by welding, to their peripheries, magnetostrictive input and output driving rods 13, 22 being attached to the peripheries of the outermost discs 14, 20 and extending respectively through input and output coils 12, 23. The input and output rods 13, 22 are polarized by permanent magnets 15, 26. The thickness and diameter of the discs determine the resonant frequency of the system and each disc is tuned separately before assembly. They are preferably made from a nickel-iron alloy having a high Q and zero thermo-elastic coefficient. For a pass band centring on 455 kc/s. the end discs are tuned to 455.8 kc/s. and the inner discs to 455.2 kc/s. The filter may be supported from the nodal rings on the end discs 14, 19. Alternatively the rings may be'clamped loosely about their peripheries. Specification 703,144 is referred to.
GB166953A 1953-01-20 1953-01-20 Electro-mechanical filters Expired GB722664A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB166953A GB722664A (en) 1953-01-20 1953-01-20 Electro-mechanical filters

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB166953A GB722664A (en) 1953-01-20 1953-01-20 Electro-mechanical filters

Publications (1)

Publication Number Publication Date
GB722664A true GB722664A (en) 1955-01-26

Family

ID=9725996

Family Applications (1)

Application Number Title Priority Date Filing Date
GB166953A Expired GB722664A (en) 1953-01-20 1953-01-20 Electro-mechanical filters

Country Status (1)

Country Link
GB (1) GB722664A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1214810B (en) * 1960-02-15 1966-04-21 Telefunken Patent Mechanical high frequency filter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1214810B (en) * 1960-02-15 1966-04-21 Telefunken Patent Mechanical high frequency filter

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