GB1020038A - A selective frequency responsive device - Google Patents

A selective frequency responsive device

Info

Publication number
GB1020038A
GB1020038A GB4645663A GB4645663A GB1020038A GB 1020038 A GB1020038 A GB 1020038A GB 4645663 A GB4645663 A GB 4645663A GB 4645663 A GB4645663 A GB 4645663A GB 1020038 A GB1020038 A GB 1020038A
Authority
GB
United Kingdom
Prior art keywords
reed
alternating
terminals
cause
mass
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
GB4645663A
Inventor
Wilfred Gerhard Olscher
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.)
Philips Components Ltd
Original Assignee
Mullard Ltd
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 Mullard Ltd filed Critical Mullard Ltd
Priority to GB4645663A priority Critical patent/GB1020038A/en
Publication of GB1020038A publication Critical patent/GB1020038A/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
    • H03H9/24—Constructional features of resonators of material which is not piezoelectric, electrostrictive, or magnetostrictive

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Reciprocating Pumps (AREA)

Abstract

1,020,038. Electromechanical filters. MULLARD Ltd. Nov. 25, 1963, No. 46456/63. Heading H3U. A frequency selective filter comprises a flexible magnetizable reed 1, a core 6 for alternately magnetizing the reed in opposite directions upon the application of an alternating electrical input at terminals 7 and permanent or electromagnets 4, 5 to cause the reed to vibrate in synchronism with the alternating magnetization thereof, the reed 1 being secured at one end to a mass 2 to which its vibrations are transmitted and the mass carrying a ceramic piezo-electric transducer 8 from which an output can be derived. The reed has a natural resonant frequency; alternating currents of this frequency applied to terminals 7 cause a largeamplitude vibration of the reed and a corresponding large-amplitude output from the transducer 8.
GB4645663A 1963-11-25 1963-11-25 A selective frequency responsive device Expired GB1020038A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4645663A GB1020038A (en) 1963-11-25 1963-11-25 A selective frequency responsive device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4645663A GB1020038A (en) 1963-11-25 1963-11-25 A selective frequency responsive device

Publications (1)

Publication Number Publication Date
GB1020038A true GB1020038A (en) 1966-02-16

Family

ID=10441346

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4645663A Expired GB1020038A (en) 1963-11-25 1963-11-25 A selective frequency responsive device

Country Status (1)

Country Link
GB (1) GB1020038A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011088874A1 (en) 2010-12-16 2012-07-05 Thermo Fisher Scientific (Bremen) Gmbh Devices and methods for ion mobility spectrometry

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011088874A1 (en) 2010-12-16 2012-07-05 Thermo Fisher Scientific (Bremen) Gmbh Devices and methods for ion mobility spectrometry
DE102011088874B4 (en) * 2010-12-16 2015-07-02 Thermo Fisher Scientific (Bremen) Gmbh Apparatus and method for ion mobility spectrometry

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